IEC Implementation in the Mitsubishi System FX3U PLCs. Start-Up document. Version

Transcription

1 Start-Up IEC Implementation in the Mitsubishi System FX3U PLCs Version NU.DOT, Mitsubishi Electric Europe B.V. Tel +49(0) Internet

2 Revisions history Version Date Revision Signatur Message Type 105 update (it now also takes account of QRP = 2) Updated with message Type Updated "MaxNoOfObjects" for Tx function blocks (ex TxTypeIdent5") DLT Added info about the number of steps that the basic program occupies (see Chapter 3.33) Update after KEMA Certification, the following chapters have been affected - Chapter (updated) - Chapter 2.6 (new) - Chapter 3.1 (updated) - Chapter 4 (updated, COT and COT = 10 = 44) Chapter 1.4 IEC-104 parameters (timeout) is updated. PLC now also handles W parameter Added the info that copying is also made to the L internal relays respectively W-register. This has been done to chapter 2.1, 2.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.11, 3.13 and 3: ) All SendTypeIdent- and TxTypeIdent-functionblock has been updated: - New input variabel "TableBufferMaxNoOfObj" for dynamic calculation of Table size (buffer size). - Table array size changed to [0..0]. 2) Functionblock RingBufferTypeIdent34 has been removed and SendTypeIdent34 and TxTypeIdent34 have now the exact same behaviour as type identity 35! 3) Function block ClockNoInterrupt has been updated, chapt ) Picture in Chapter 1.2 updated (Control Field Format). 5) Chapter 3.33 updated (Function Block info number of steps). 6) Corrections of text-translations! New type identification 63 added (see Chapter 3.25)! Chapter 3.34 updated, chapter 4.21 new! New chapter 2.6 ObjectAddr. DLT DLT DLT DLT DLT DLT DLT DLT DLT IEC System FX3U PLC implementation_ver (126)

3 TABLE OF CONTENTS 1 Message format General description of the communication structure Control Field Format I-format S-format U-format Quality Descriptors QualityDescriptor IEC-104 parameters (timeouts) Ring buffer RingBufferTypeIdent30 (Single point) RingBufferTypeIdent31 (Double point) Scantime test AlarmPresentation TypeIDImplemented ObjectAddr Message APCI handling Sequence handling Message Type 1- Single point information without time tag Message Type 3 - Double point information without time tag Message Type 5 - Step position information Message Type 9 - Measured value, normalised value Message Type 11 - Measured value, scaled value Message Type 13 - Measured value, short floating point value Message Type 30 - Single point information with full time tag Message Type 31 - Double point information with full time tag Message Type 32 - Step position information Message Type 34 - Measured value, normalised value (full time tag) Message Type 35 - Measured value, scaled value (full time tag) Message Type 36 - Measured value, short floating point value Message Type 45 - Single command Message Type 45 - Single command (with select verifying) Message Type 46 - Double command Message Type 46 - Double command (with select verifying) Message Type 47 Regulating step command Message Type 48 - Set-point Command, normalised value Message Type 49 - Set-point Command, scaled value...85 DLT IEC System FX3U PLC implementation_ver (126)

4 3.22 Message Type 50 - Set-point Command, short floating point value Message Type 58 - Single command with full time tag Message Type 59 - Double command with full time tag Message Type 63 - Set point command, short floating point value, with full time tag Messagee Type 70 - End of initialisation Message Type Interrogation command Message Type Clock synchronisation command Message Type Reset process command Message Type Test command with full time tag ClockInterruptXms ClockNoInterrupt SummerTime Function Block info number of steps Annexes - Message Building Message Type 1 (Single-point information without time tag) Message Type 3 (Double-point information without time tag) Message Type 5 (step position information without time tag) Message Type 9 (Measured value, normalised value) Message Type 11 (Measured value, scaled value) Message Type 13 (Measured value, short floating point value) Message Type 30 (Single-point information with full time tag) Message Type 31 (Double-point information with full time tag) Message Type 32 (Step position information full time tag) Message Type 34 (Measure value, normalised value full time tag) Message Type 35 (Measure value, scaled value full time tag) Message Type 36 (Measure value, floating point value full time tag) Message Type 45 (Single command) Message Type 46 (Double command) Message Type 47 (Regulating step command) Message Type 48 (Set-point command, normalised value) Message Type 49 (Set-point command, scaled value) Message Type 50 (Set-point command, short floating point value) Message Type 58 (Single command with full time tag) Message Type 59 (Double command with full time tag) Message Type 63 (Set-point command, short floating point value, with full time tag) Message Type 70 (End of initialisation) Message Type 100 (Interrogation command) Message Type 103 (Clock synchronisation command) Message Type 105 (Reset process command) Message Type 107 (Test command) DLT IEC System FX3U PLC implementation_ver (126)

5 1 Message format 1.1 General description of the communication structure Buffer[0] LSB MSB Number of total bytes Buffer[1]..[n] Buffer[1] LSB Start code (always 104) MSB Number of bytes Buffer[2]..[n] Buffer[2] LSB Control Field octet 1 MSB Control Field octet 2 Buffer[3] LSB Control Field octet 3 MSB Control Field octet 4 Buffer[4] LSB Message Type MSB Object number Buffer[5] LSB Cause (Cause of transmission) Buffer[6] Buffer[7] Buffer[8] Buffer[9] MSB LSB MSB LSB MSB LSB MSB LSB MSB Buffer[10] LSB Buffer[n] MSB LSB MSB Originator address ASDU address (PLC) Object address Object data APCI ASDU APDU APCI = Application Protocol Control Information ASDU = Application Service Data Unit APDU = Application Protocol Data Unit DLT IEC System FX3U PLC implementation_ver (126)

6 1.2 Control Field Format The Control field is used to define the control information (sequence handling) to prevent loss or duplication of data. Also used to start and stop the data transmission as well as monitoring of the connection. There are three types of control field formats: I-format (numbered information transfer). S-format (numbered monitoring function) U-format (unnumbered monitoring function) DLT IEC System FX3U PLC implementation_ver (126)

7 1.2.1 I-format Control Field octet 1 bit0 = 0 defines an I-format. It is used to perform numbered information transfer. It contains send-sequence number and receive-sequence number. The transmitter station increases send-sequence number when it sends any data and receiver increases receive-sequence number when it receives any data. The sending station has to hold the send APDUs in the buffer until it receives back the send sequence numbers as the receive sequence number from destination station. Message Type s 1, 3, 30, 31, 45, etc. (as described in this ) are of Type I-format! Note. When receiving an I-format, the PLC checks the "Send Sequence Number", which is obtained from the supervisory system, to be consistent with the number the PLC has received. If this is not true the PLC will try to do a reconnection of the current connection. The supervisory system may then reestablish the link S-format Control Field octet 1 bit0 = 1, bit1 = 0 defines an S-format. S-format contains only a APCI. It is used to perform numbered supervisory functions. In any cases where the data transfer is only in a single direction, S-format APDUs has to be send in other direction before timeout (t2), buffer overflow or when it has crossed maximum number of allowed I-format APDUs without acknowledgement. Example: When the PLC sends a spontaneous alarm to the active supervisory system (ie those who have sent "StartDT") they will, after a set period of time (for instance 10 seconds, adjustable in t2- param, see Chapter 1.4 for more information), send a response in the form of an S-message (with the number of messages received from PLC). When the S-message is received and the "Receive Sequence DLT IEC System FX3U PLC implementation_ver (126)

8 Number" is consistent with the number of message (I-format) that PLC has sent this is an approved response (format). If the PLC does not receive any approved (valid) response within the set time (ex 15 seconds (adjustable in t1-param, see Chapter 1.4 for more info) then the connection will try to "reconnect" and the PLC will try to resend the information when the connection is re-established. If the PLC sends for example 10 messages in a row the result will also be an S-format that is sent from the supervisory system for example after the 8th message (selectable in the W-param, see Chapter 1.4 for more info). DLT IEC System FX3U PLC implementation_ver (126)

9 1.2.3 U-format Control Field octet 1 bit0 = 1, bit1 = 1 defines a U-format. U-format contains a single APCI. It is used to perform unnumbered control functions. This is used for activation and confirmation mechanisms of STARTDT (Start Data Transfer), STOPDT (Stop Data Transfer) & TESTFR (Test APDU). TestFR = Test frame StartDT = Start data transfer StopDT = Stop data transfer act = activation (sent to PLC) con = confirmation (sent from PLC) Test frames are sent (usually every 30 seconds, adjustable in t3-param, see Chapter 1.4 for more info) by the supervisory system. This is done to ensure that communication is OK. If the supervisory system is to exchange data with PLC (ex post command for controlling the switches, the reception of alarms / events, etc it must first send a StartDT, then the data exchange (in the form of alarms / events / management, etc.) will be possible. If the PLC is waiting for receive confirmation (for ex after sending an alarm) and in the meantime, a StopDT is received, the PLC will wait first for the receive confirmation before confirmation of StopDT is made and data exchange is closed. DLT IEC System FX3U PLC implementation_ver (126)

10 1.3 Quality Descriptors The message sent to an external device (eg, Message Type 1, 3, 13, 30, 31 and 34) also contains Quality Descriptors (QD). These bits are described below: QD 0/1 Explanation Kommentar OV 1 = overflow The value of the information object is beyond a predefined range value. BL 1 = blocked The value of the information object is blocked for transmission; the value remains in the state that was acquired before it was blocked. Blocking and deblocking may be initiated e.g. by a local or a local automatic cause. SB 1 = substituted The value of the information object is provided by input of an operator (dispatcher) or by an automatic source. NT 1 = not topical A value is topical if the most recent update was successful. It is not topical if it was not updated successfully during a specified time interval or it is unavailable. IV 1 = invalid A value is valid if it was correctly acquired. After the acquisition function recognises abnormal conditions of the information source (missing or non operation updating devices) the value is then marked invalid. The value of the information object is not defined under this condition. The mark INVALID is used to indicate to the destination that the value may be incorrect and cannot be used. At the change of these bits the PLC sends the message to the external device. The function blocks have the possibility to choose if QD will be used or not. Mainly applicable to analogue value (t ex Message Type 34) DLT IEC System FX3U PLC implementation_ver (126)

11 1.3.1 QualityDescriptor Combines (according to 104 standard) Quality Descriptor signals to a data register. See also chap. 1.3 Quality Descriptors above. Name Type Explanation IV NT SB BL OV BOOL 1=invalid (=>bit7 i QD) BOOL 1=not topical (=>bit6 i QD) BOOL 1=substituted (=>bit5 i QD) BOOL 1=blocked (=>bit4 i QD) BOOL 1=overflow (=>bit0 i QD). Valid only for read ( eg. Message Type 34) QD INT Containing the above information. Note. Function blocks can have the same instance name. DLT IEC System FX3U PLC implementation_ver (126)

12 1.4 IEC-104 parameters (timeouts) There are also a number of default parameters in the PLC program that is set in the POU: "IEC_Initiations". These are: Timeout-tider t0 t1 t2 t3 Connection establishment timeout If no message is received during this time the PLC will close the connection and then reconnect again (Default = 40 sec). APDU timeout When the PLC has sent a message and response has not occurred during this period the PLC will close the connection and then reconnect again (Default = 15 sec). Acknowledgement timeout Time before acknowledge is sent in a form of a S-message, sent after receiving an I-format message that does not require a response (Default = 10 sec). Test connection timeout If no message is sent, Test frames will be sent (TestFR) after this time (Default = 20 sec). Note: The PLC does not send test frames! Parameters k w Max number of messages that can be sent without having received any response (Default = 12). After the max number is reached, stop the transfer until a response is received. Number of received messages before the response (S-format message) is sent (Default = 8). Recommendation: w should not exceed 2/3 of parameter k. DLT IEC System FX3U PLC implementation_ver (126)

13 2 Ring buffer Continuously logs change in the signal status (eg, alarms / events / break status) with full timestamp to a ringbuffer (ie R-register). Quality descriptors are also used when logging these changes. There are two Types of function blocks: RingBufferTypeIdent30 (eg alarm) and RingBufferTypeIdent31 (ON and OFF bits for 2 bit status). This function block is placed in the POU : "IEC_Interrupt_Clock" which is linked to a task with maximum interrupt internal time factor priority (is executed every 10 ms). Each object occupies 6 fileregisters. Storage to fileregisters for Double resp Single Point is explained in the table below: R[1] R[2] Object address (0..n) Signal status (SinglePoint: 0=OFF, 1=ON, DoublePoint: 0=OFF/OFF, 1=OFF/ON, 2=ON/OFF, 3=ON/ON) + Quality Descriptor (IV, NT, SB, BL) R[3] ms ( ) R[4] R[5] hours [MSB], minutes [LSB] months [MSB], days [LSB] R[6] years (eg, value "5" means the year 2005) There is also a function block AlarmPresentation used to store the last XX alarms from the ring buffer to an array of dataregisters (eg for presentation on a terminal). DLT IEC System FX3U PLC implementation_ver (126)

14 2.1 RingBufferTypeIdent30 (Single point) Function block used to log the time (timestamp) as well as the object address and the current status to the ring buffer, at the change of the signal status (single point) or QD (Quality Descriptor). Name Type Explanation InfoClockRet ARRAY [0..4] OF WORD Current time in the PLC (see also "ClockNoInterrupt ") NoOfObjects INT Number of objects (values) to read, starting from "StartAddrM" (affects the scan time of the PLC). StartAddrM INT Start address of the internal relay to be monitored\controlled. Ex M3000. StartAddrM_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. RingBufferStartRAddress INT Start address (fileregister, R-reg) of the the ring buffer in which the information begins to be logged. Ex R1003. RingBufferMaxNoR INT Max number of registers of the ring buffer. (the size of the ringbuffer). Pointer INT Write pointer to the ring buffer (use the same variable for the function block SendTypeIdent30and31). InfoMaxNoOfObj INT The maximum number of objects that are stored in a ringbuffer. (each object uses 6 fileregisters). ErrorMaxNoR BOOL Signal is activated if the set maximum number of fileregisters is incorrect (max number of fileregisters must be a multiple of 6, because each object uses 6 filregisters). DLT IEC System FX3U PLC implementation_ver (126)

15 2.2 RingBufferTypeIdent31 (Double point) Logging for example, breaker status (ON bit and OFF bit of a 2 bit status) with full timestamp. Logging takes place at the change of the internal relays status or when the data register (Quality Descriptor) is changed if it is used. Name Type Explanation InfoClockRet ARRAY [0..4] OF WORD Current time in the PLC (see also "ClockNoInterrupt ") NoOfObjects INT Number of objects (values) to read, starting from "StartAddrM" (affects the scan time of the PLC). StartAddrMOnBit INT The ON bit (of a 2 bit status) of the start address (M) to be monitored\controlled. Ex M3200. StartAddrMOnBit_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrMOffBit INT The OFF bit (of a 2 bit status) of the start address (M) to be monitored\controlled. Ex M3300. StartAddrMOffBit_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. RingBufferStartRAddress INT Start address (fileregister, R-reg) of the the ring buffer in which the information begins to be logged. Ex R3003. RingBufferMaxNoR INT Max number of registers of the ring buffer. (the size of the ringbuffer). Pointer INT Write pointer to the ring buffer (use the same variable for the function block FB_sendIdent30and31). InfoMaxNoOfObj INT The maximum number of objects that are stored in a DLT IEC System FX3U PLC implementation_ver (126)

16 ringbuffer. (each object uses 6 fileregisters). ErrorMaxNoR BOOL Signal is activated if the set maximum number of fileregisters is incorrect (max number of fileregisters must be a multiple of 6, because each object uses 6 filregisters). DLT IEC System FX3U PLC implementation_ver (126)

17 2.3 Scantime test At the logging of alarms, which have an accuracy of 10 ms, below is shown an example of how the number of alarms affects the PLC scan time. The test is performed with a FX3U-CPU. In addition to function blocks RingBufferTypeIdent30 and RingBufferTypeIdent31 we also use the ClockNoInterrupt and we copy the input signals in internal relays which are then used in function blocks. Single point (Type 30) Number of objects Double point (Type 31) Number of objects Current scantime (ms) , , , , ,1 Considerations If the number of alarms is increasead the execution time increases also and the execution time of other programs will be shorter. (this applies only when we use 10msaccuracy and these function blocks is used in an interrupt). DLT IEC System FX3U PLC implementation_ver (126)

18 2.4 AlarmPresentation Stores the last XX alarms from the ringbuffer to an array of registers (eg for presentation on a terminal). Note: Each alarm object occupies 10 data registers! Name Type Explanations NoOfObjects INT The number of the most recent alarms to be read from the ringbuffer. Ex 300. RingBufferPointer INT Use the pointer used for function block RingBufferTypeIdent30. RingBufferStartRAddress INT Start address of the the ring buffer in which the information begins to be logged. Use the same value as for RingBufferTypeIdent30. RingBufferMaxNoR INT Max number of registers of the ring buffer. (the size of the ringbuffer). Use the same value as for RingBufferTypeIdent30. AlarmStartDAddress INT Start address (D-register) of the alarm information. Ex D4000. DLT IEC System FX3U PLC implementation_ver (126)

19 2.5 TypeIDImplemented Enter the Message types that are implemented / used (TRUE = Implemented) in the PLC program. If a message is sent from the supervisory system and is not implemented in the PLC, then this function block will send a response back in the form of COT = 44 (ie, "unknown Type identification ) and a negative confirmation. If this function block is not used then the PLC will only send an acknowledgment in the form of an S-message after the time t2 has expired (see Chap. 1.4 for more info). The information about the error message type which has been sent will not be available. In this example, Message Types 46, 48, 100 and 103 are implemented! DLT IEC System FX3U PLC implementation_ver (126)

20 2.6 ObjectAddr In some SCADA systems the object addresses are defined as 3 Bytes. For those SCADA systems that are not using this way of configurating the addresses this function block will help you converting the object address into those 3 Bytes the PLC are using. Example The address 500 means that Byte1=244, Byte2=1 and Byte3=0, but the function block ObjectAddr will do this calculation for you. DLT IEC System FX3U PLC implementation_ver (126)

21 3 Message 3.1 APCI handling Checks the format-type of the incoming message. Also handles the messages "StartDT" and "TestFR", which the PLC uses to send responses back. Handling the "StopDT " message is made by a different function block, "StopDTConfirmation"and is not addressed in this manual. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Destination buffer to the PLC. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send Buffer from the PLC. SFormatSend BOOL Enable the transmission of S-format message containing the sequence number "S_format_Sequence". SFormatSequence INT Sequence number to be sent in a S-format message. FormatType INT Format-Type of the incoming message. 1 = I-format, 2 = S-format, 3 = U-format SFormatRx BOOL Pulse signal that is activated if the S- format is received. S-format consists only of an APCI. SFormatTx BOOL Pulse signal that is activated if the S- format is sent by the PLC. S-format consists only of an APCI. IFormat BOOL Pulse signal that is activated if the I- format is received. The format always contains an ASDU. UFormatStartDT BOOL Pulse signal that is activated if the U- format is received and it contains a STARTDT message (ie start data transfer). DLT IEC System FX3U PLC implementation_ver (126)

22 UFormatTestFR BOOL Pulse signal that is activated if the U- format is received and it contains a TESTFR message (ie test frame). DLT IEC System FX3U PLC implementation_ver (126)

23 3.2 Sequence handling Handling of sequence numbers for message (only for I-format). This is used to prevent data loss and duplication of data. When the PLC receives a message, it increases "SequenceVReceive" (at 32,767 received messages it starts to count again from 0). When the PLC sends a message, it increases " SequenceVSend" (at 32,767 received messages it starts to count again from 0). Each time a message is sent from the PLC (only I-format) this register are copied to the control field register of the send buffer (see also chap 1.2). Name Type Explanation ConnNumber INT Specifies the connection number (ethernet), for which the processing is done. ConnOpen BOOL Signal indicating that the connection is open. ConnActive BOOL Signal indicating that the connection is active and data may be transmitted ("StartDT" has been activated). StartDTReceived BOOL This signal (StartDT) resets the register sequence. IFormatReceived BOOL Signal indicating that an I-format message has been received. SFormatReceived BOOL Signal indicating that a S-format message has been received. LatestConnReceived INT Indicates the connection number from which the last message has been received. WaitSend BOOL This signal interlocks sending of sequence data(registers) to the send buffer. RxBuffer ARRAY [0..127] OF INT Destination buffer to the PLC. TxBlock BOOL 1=Blocking the sequence of handling the sending of message. TxStatus INT Send Status Register (number of bytes to be sent). DLT IEC System FX3U PLC implementation_ver (126)

24 TxBuffer ARRAY [0..127] OF INT Send Buffer from the PLC. SequenceVSend INT Sequence index that increases with each time a message (I format) is sent (starting from zero for the value 32767) SequenceVReceive INT Sequence index that increases with each time a message (I-format) are received (starting at zero for the value 32767) AckOk Pulse signal activated if the Send sequence is OK (the number received by the supervisory system corresponds with the number that the PLC has sent.). See also chapter for more info. SequenceError BOOL Pulse signal activated if the receive sequence has an error (the number received by the supervisory system does not correspond with the number that the PLC has sent.). See also chapter for more info. TxBufferSendSequence INT Same content as the sequence register (send), above, but data is shifted one bit to the left (see Chap I- format) TxBufferReceiveSequence INT Same content as the sequence register (receive), above, but data is shifted one bit to the left (see Chap I- format) DLT IEC System FX3U PLC implementation_ver (126)

25 3.3 Message Type 1- Single point information without time tag Detects and sends the status change of internal internal relays to the supervisory system. For example, breaker status (open, not open). Without timestamp. The function block block SendTypeIdent1and3 is used to logg, at the status change of objects, single-point or double-point information without timestamp into the ring buffer (Table). Max objects can be stored in the ring buffer. Name Type Explanation TypeIdent INT Message Type, 1 or 3 (single point or double point) ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal internal relay (bit) (StartAddrMOffBit). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrMOffBit). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal internal relay (bit) (StartAddrMOffBit). NoOfObjects INT Number of internal relays in the PLC to be controlled. StartAddrMOnBit INT Not used for Message Type 1. StartAddrMOnBit_copy INT Not used for Message Type 1. StartAddrMOffBit INT Start address of the internal relay to be monitored\controlled (eg M1000). StartAddrMOffBit_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. DLT IEC System FX3U PLC implementation_ver (126)

26 EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. NumberPerScan INT Number of internal relays (bits) that are checked each scan (decrease when the CPU load is high). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 2 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent1and3 to TxTypeIdent1and3. Number of registers to allocate = 2 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent1and3 and TxTypeIdent1and3). TableReadIndex INT Read pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent1and3 and TxTypeIdent1and3). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent1and3 and TxTypeIdent1and3). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

27 TxTypeIdent1and3 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = OK to send message TypeIdent WORD Message Type, 1 or 3 (single point or double point) ASDUAddrByte2 INT PLC address (octet 2). ASDUAddrByte1 INT PLC address (octet 1). GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit) (StartAddrMOffBit). GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrMOffBit). GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit) (StartAddrMOffBit). GI_NoOfObjects INT Number of internal relays (bits) in the PLC to be controlled. GI_StartAddrMOnBit INT Not used for Message Type 1. GI_StartAddrMOffBit INT Start address of the internal relay to be monitored\controlled (eg M1000). GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1= blocking General Interrogation (GI). DLT IEC System FX3U PLC implementation_ver (126)

28 TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 2 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 59) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the function block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent1and3 to TxTypeIdent1and3. Number of registers to allocate = 2 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent1and3and TxTypeIdent1and3). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent1and3and TxTypeIdent1and3). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent1and3and TxTypeIdent1and3). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

29 3.4 Message Type 3 - Double point information without time tag Detects and sends status changes of internal relays to the supervisory system in double point information. For example, Breaker status (Open, Close). Without timestamp. The function block SendTypeIdent1and3 is looking for status changes in internal relays. Each time a change is detected it is registered into the ring buffer (Table). Max objects can be stored in the ring buffer. Name Type Explanation TypeIdent INT Message Type, 1 or 3 (single point or double point) ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit) (StartAddrMOnBit/o). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrMOnBit/o). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit) (StartAddrMOnBit/o). NoOfObjects INT Number of internal relays (objects) in the PLC to be controlled. StartAddrMOnBit INT The ON bit (of a 2 bit status) of the start address (M) to be monitored\controlled. Ex M1100. StartAddrMOnBit_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrMOffBit INT The OFF bit (of a 2 bit status) of the start address (M) to be monitored\controlled. Ex M1200. StartAddrMOffBit_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is DLT IEC System FX3U PLC implementation_ver (126)

30 used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. NumberPerScan INT Number of internal relays (bits) that are checked each scan (decrease when the CPU load is high). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 2 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent1and3 to TxTypeIdent1and3. Number of registers to allocate = 2 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent1and3and TxTypeIdent1and3). TableReadIndex INT Read pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent1and3and TxTypeIdent1and3). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent1and3and TxTypeIdent1and3). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

31 TxTypeIdent1and3 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message TypeIdent WORD Message Type, 1 or 3 (single point or double point) ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrMOnBit/o) GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrMOnBit/o) GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrMOnBit/o). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrMOnBit INT The ON bit (of a 2 bit status) of the start address (M) to be monitored\controlled at General Interrogation. Ex M1100. GI_StartAddrMOffBit INT The OFF bit (of a 2 bit status) of the start address (M) to be monitored\controlled at General Interrogation. Ex M1200. GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, DLT IEC System FX3U PLC implementation_ver (126)

32 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 2 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 59) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the funtion block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent1and3 to TxTypeIdent1and3. Number of registers to allocate = 2 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent1and3and TxTypeIdent1and3). TableReadIndex INT Read pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent1and3and TxTypeIdent1and3). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable fo function blocks SendTypeIdent1and3and TxTypeIdent1and3). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register States (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

33 3.5 Message Type 5 - Step position information Send step position info (-64 to 63) to the supervisory system when they are changed or if the QD (Quality Descriptors) are changed. Whitout timestamp. The function block SendTypeIdent5 is looking for changes in data registers. Each time a change is detected it is registered into the ring buffer (Table). Max objects can be stored in the ring buffer. Name Type Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit) (StartAddrD). NoOfObjects INT Number of objects (D-registers) in the PLC to be controlled. StartAddrD INT Start address of the data register which contains the measured value (16-bit). Value must be between -64 to 63! StartAddrD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. NumberPerScan INT Number of objects to be checked every scan (reduce if the CPU load is high). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 2,5 registers. DLT IEC System FX3U PLC implementation_ver (126)

34 Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent5 to TxTypeIdent5. Number of registers to allocate = 2,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent5and TxTypeIdent5). TableReadIndex INT Read pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent5and TxTypeIdent5). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent5and TxTypeIdent5). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

35 TxTypeIdent5 sends the values from the ringbuffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrD). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrD INT Start address of the data register, at General Interrogation, which contains the value (16-bit). Value must be between -64 to 63! Ex D1300. GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 2,5 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max DLT IEC System FX3U PLC implementation_ver (126)

36 47) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent5 to TxTypeIdent5. Number of registers to allocate = 2,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent5 and TxTypeIdent5). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent5 to TxTypeIdent5). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent5 and TxTypeIdent5). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

37 3.6 Message Type 9 - Measured value, normalised value Sends measured values to the supervisory system at the change of the internal relays (bits) (rising edge of the signal only) or if QD (Quality Descriptors) are changed. No time-stamping occurs. Function block SendTypeIdent9 is looking for changes in the internal relays / data registers. Each time a change is detected it is registered into the ring buffer (Table). Max objects can be stored in the ring buffer. Name Typ e Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit) (StartAddrD). NoOfObjects INT Number of objects (internal relays (bits)) in the PLC to be controlled. StartAddrM INT Start address of the internal relay to be monitored\controlled. (Ex M1400). StartAddrM_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD INT Start address of the data register which contains the value (16- bit). Ex D1400. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. DLT IEC System FX3U PLC implementation_ver (126)

38 NumberPerScan INT Number of internal relays (bits) that are checked each scan (reduce if the CPU load is high). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 3 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent9 to TxTypeIdent9. Number of registers to allocate = 3 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent9 and TxTypeIdent9). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent9 and TxTypeIdent9). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent9 and TxTypeIdent9). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

39 TxTypeIdent9 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrD). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrD INT Start address of the data register which contains the value (16-bit), at General Interrogation. Value must be between -64 to 63! Ex D1400 GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 3 registers. DLT IEC System FX3U PLC implementation_ver (126)

40 MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 39) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent9 to TxTypeIdent9. Number of registers to allocate = 3 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent9 and TxTypeIdent9). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent9 to TxTypeIdent9). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent9 and TxTypeIdent9). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register States (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

41 3.7 Message Type 11 - Measured value, scaled value Sends measured values ( till 32767) to the supervisory system at the change of the internal relays (bits) (rising edge of the signal only) or if QD (Quality Descriptors) are changed. Whitout timestamp. Function block SendTypeIdent11 is looking for status changes in the internal relays / data registers. Each time a change is detected it is registered into the ring buffer (Table). Max objects can be stored in the ring buffer. Name Type Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit) (StartAddrD). NoOfObjects INT Number of objects (internal relays (bits)) in the PLC to be controlled. StartAddrM INT Start address of the internal relay to be monitored\controlled. (Ex M1500). StartAddrM_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD INT Start address of the data register which contains the value(16-bit). Ex D1500. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. DLT IEC System FX3U PLC implementation_ver (126)

42 NumberPerScan INT Number of internal relays (bits) that are checked each scan (reduce if the CPU load is high). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 3 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent11 to TxTypeIdent11. Number of registers to allocate = 3 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent11 and TxTypeIdent11). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent11 and TxTypeIdent11). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent11 and TxTypeIdent11). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

43 TxTypeIdent11 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrD). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrD INT Start address of the data register which contains the value(16-bit), at General Interrogation. GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 3 registers. DLT IEC System FX3U PLC implementation_ver (126)

44 MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 39) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent11 to TxTypeIdent11. Number of registers to allocate = 3 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent11 and TxTypeIdent11). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent11 and TxTypeIdent11). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent11 and TxTypeIdent11). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

45 3.8 Message Type 13 - Measured value, short floating point value Send floating-point value to the supervisory system at the change of the internal relays (rising edge of the signal) or if QD (Quality Descriptors) are changed. No time-stamping occurs. Function block SendTypeIdent13 is looking for changes in the internal relays / data registers. Each time a change is detected it is registered into the ring buffer (Table). Max 8191 objects can be stored in the ring buffer. Name Type Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit) (StartAddrD). NoOfObjects INT Number of objects (internal relays (bits)) in the PLC to be controlled. StartAddrM INT Start address of the internal relay to be monitored\controlled. (Ex M1600). StartAddrM_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes StartAddrD INT Start address of the data register which contains the floating point value. Obs: floating point value occupies 2 dataregister (32-bits). StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. DLT IEC System FX3U PLC implementation_ver (126)

46 NumberPerScan INT Number of internal relays (bits) that are checked each scan (reduce if the CPU load is high). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 4 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent13 to TxTypeIdent13. Number of registers to allocate = 4 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent13 and TxTypeIdent13). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent13 to TxTypeIdent13). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent13 and TxTypeIdent13). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

47 TxTypeIdent13 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrD). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrD INT Start address of the data register which contains the floating point value, at the General Interrogation. Obs: floating point value occupies 2 dataregister (32-bits). GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 4 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max DLT IEC System FX3U PLC implementation_ver (126)

48 29) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent13 to TxTypeIdent13. Number of registers to allocate = 4 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TblWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent13 and TxTypeIdent13). TblReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent13 and TxTypeIdent13). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent13 and TxTypeIdent13). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

49 3.9 Message Type 30 - Single point information with full time tag Send the status changes of the internal relays to the supervisory system. For ex alarm (On, Off). The information in full timestamp retrieved from the ring buffer from the function block RingBufferTypeIdent30. This ring buffer is named Single_Ringbuffer in the text below to facilitate understanding. Each time a change is detected in Single_Ringbuffer or SendTypeIdent30and31 it is registered into the ring buffer (Table) (with some modification in accordance with 104 standard before the information is then passed through the function block TxTypeIdent30and31). Max 5957 objects can be stored in the ring buffer. Name Type Explanation Block BOOL Blocks the execution of the function block. TypeIdent INT Type of message, 30 or 31 (single point or double point). ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit). NumberPerScan INT Number of objects to be checked every scan when new objects have been added to Single_Ringbuffer, ie new changes (reduce when the CPU load is high). Timeout_t1 INT T1 timeout period for receive from the supervisory system (see also Chapter 1.4 for more info). DLT IEC System FX3U PLC implementation_ver (126)

50 Acknowledge BOOL 1 = receive from the supervisory system. If receive is not obtained within timeout period t1, the PLC will try to resend the information previously submitted. ConnectionOK BOOL 1 = OK to send the message (ie the connection is established). RingBufferStartRAddress INT Start address of the the ring buffer in which the information begins to be logged. Use the same variable as for Single_Ringbuffer. RingBufferMaxNoR INT Max number of registers of the ring buffer. (the size of the ringbuffer). (ie the size of Single_Ringbuffer). Use the same as for Single_Ringbuffer. TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 5,5 registers. Pointer INT Use the pointer used for function block Single_Ringbuffer. PointerRead INT Internal pointer to keep track of the last read alert Single_Ringbuffer in this function block. PointerReadBackup INT Backup of PointerRead. If message, that was sent, do not get any acknowledge from controlling system then the PLC-system will step back to the pointer value in this register. Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent30and31 to TxTypeIdent30and31. Number of registers to allocate = 5,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent30and31and TxTypeIdent30and31). TableReadIndex INT Read pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent30and31 and TxTypeIdent30and31). TableNoOfObjects INT Number of objects in the ring buffer (Use the same variable for function blocks SendTypeIdent30and31 and TxTypeIdent30and31). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

51 TxTypeIdent30and31 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message TypeIdent WORD Message Type, 30 or 31 (single point or double point) ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrMOffBit) GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrMOffBit) GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrMOffBit). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrMOnBit INT Not used for Message Type 30. GI_StartAddrMOffBit INT Start address of the internal relay to be monitored\controlled (eg M3000) at General Interrogation. GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for DLT IEC System FX3U PLC implementation_ver (126)

52 instance). 1 object = 5,5 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 21) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the function block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent30and31 to TxTypeIdent30and31. Number of registers to allocate = 5,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent30and31and TxTypeIdent30and31). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent30and31and TxTypeIdent30and31). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent30and31and TxTypeIdent30and31). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

53 3.10 Message Type 31 - Double point information with full time tag Send the status changes of the internal relays to the supervisory system. For ex alarm (indeterminate or intermediate state, determined state OFF, determined state ON, indeterminate state). The information in full timestamp retrieved from the ring buffer from the function block RingBufferTypeIdent31. This ring buffer is named Double_Ringbuffer in the text below to facilitate understanding. Each time a change is detected in Double_Ringbuffer or SendTypeIdent30and31 it is registered into the ring buffer (Table) (with some modification in accordance with 104 standard before the information is then passed through the function block TxTypeIdent30and31). Max 5957 objects can be stored in the ring buffer. Name Type Explanation Block BOOL Blocks the execution of the function block. TypeIdent INT Type of message, 30 or 31 (single point or double point). ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit). NumberPerScan INT Number of objects to be checked every scan when new objects have been added to Double_Ringbuffer, ie new changes (reduce when the CPU load is high). Timeout_t1 INT T1 timeout period for receive from the supervisory system DLT IEC System FX3U PLC implementation_ver (126)

54 (see also Chapter 1.4 for more info). Acknowledge BOOL 1 = receive from the supervisory system. If receive is not obtained within timeout period t1, the PLC will try to resend the information previously submitted. ConnectionOK BOOL 1 = OK to send the message (ie the connection is established). RingBufferStartRAddress INT Start address of the the ring buffer in which the information begins to be logged. Use the same variable as for FB_RingBuffer_DoublePoint. RingBufferMaxNoR INT Max number of registers of the ring buffer. (the size of the ringbuffer). (ie the size of Double_Ringbuffer). Use the same as for FB_RingBuffer_DoublePoint. TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 5,5 registers. Pointer INT Use the pointer used for function block FB_RingBuffer_DoublePoint. PointerRead INT Internal pointers to keep track of the last read objects from Double_Ringbuffer in this function block. PointerReadBackup INT Backup of PointerRead. If message, that was sent, do not get any acknowledge from controlling system then the PLC-system will step back to the pointer value in this register. Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent30and31 to TxTypeIdent30and31. Number of registers to allocate = 5,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent30and31and TxTypeIdent30and31). TableReadIndex INT Read pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent30and31and TxTypeIdent30and31). TableNoOfObjects INT Number of objects in the ring buffer (Use the same variable for function blocks SendTypeIdent30and31and TxTypeIdent30and31). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

55 TxTypeIdent30and31 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message TypeIdent WORD Message Type, 30 or 31 (single point or double point) ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrMOnBit\o) GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrMOnBit\o) GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrMOnBit\o). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrMOnBit INT The ON bit (of a 2 bit status) of the start address (M) to be monitored\controlled during General Interrogation. Ex M3200. GI_StartAddrMOffBit INT The OFF bit (of a 2 bit status) of the start address (M) to be monitored\controlled during General Interrogation. Ex M3300. GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). DLT IEC System FX3U PLC implementation_ver (126)

56 TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 5,5 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 21) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the function block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent30and31 to TxTypeIdent30and31. Number of registers to allocate = 5,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent30and31and TxTypeIdent30and31). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent30and31and TxTypeIdent30and31). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent30and31and TxTypeIdent30and31). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

57 3.11 Message Type 32 - Step position information Send step position info (-64 to 63) to supervisory system when they are changed or if the QD (Quality Descriptors) is changed. With full timestamp. Function Block SendTypeIdent32 is looking for changes in data registers. Each time a change is detected it is registerd into the ring buffer (Table). Max 5461 objects can be stored in the ring buffer. Name Typ e Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay (bit) (StartAddrD). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay (bit) (StartAddrD). NoOfObjects INT Number of objects (D-registers) in the PLC to be controlled. StartAddrD INT Start address of the data register which contains the value. Value must be between -64 to 63! (7-bit). StartAddrD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. NumberPerScan INT Number of objects to be checked every scan (reduce if the CPU load is high). InfoClock ARRAY [0..4] OF Current time in the PLC (see also "ClockInterruptXms") DLT IEC System FX3U PLC implementation_ver (126)

58 WORD TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 6 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent32 to TxTypeIdent32. Number of registers to allocate = 6 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent32 and TxTypeIdent32). TableReadIndex INT Read pointer for the ring buffer (Use the same variable for function blocks SendTypeIdent32 and TxTypeIdent32). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent32 and TxTypeIdent32). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

59 TxTypeIdent32 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first data register (StartAddrD). GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first data register (StartAddrD). GI_NoOfObjects INT Number of objects in the PLC to be read at General Interrogation. GI_StartAddrD INT Start address of the data register which contains the value (16-bit), at General Interrogation. Value must be between -64 to 63! Ex D1700. GI_StartAddrD_QD INT Start address of Quality Descriptors at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking of General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 6 registers. DLT IEC System FX3U PLC implementation_ver (126)

60 MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 19) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the block. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent32 to TxTypeIdent32. Number of registers to allocate = 6 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent32 and TxTypeIdent32). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent32 and TxTypeIdent32). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent32 and TxTypeIdent32). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

61 3.12 Message Type 34 - Measured value, normalised value (full time tag) Sends measured values ( till 32767) to the supervisory system at the change of the internal relays (bits) (rising edge of the signal only) or if QD (Quality Descriptors) are changed. With full timestamp. Function block SendTypeIdent34 is looking for changes in the internal relays / data registers. Each time a change is detected it is registered into the ring buffer (Table). Max 5041 objects can be stored in the ring buffer. Name Typ e Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD). NoOfObjects INT Number of internal relays (bits) in the PLC to be controlled. StartAddrM INT Start address of the internal relay to be monitored\controlled. (Ex M1800). StartAddrM_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD INT Start address of the data register which contains the value (16-bit). Ex D1800. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. DLT IEC System FX3U PLC implementation_ver (126)

62 NumberPerScan INT Number of internal relays that are checked each scan (reduce if the CPU load is high) InfoClock InfoClockRet ARRAY [0..4] OF WORD ARRAY [0..4] OF WORD Current time in the PLC (see also "ClockInterruptXms") Current time in the PLC (see also "ClockInterruptXms") TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 6,5 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent34 to TxTypeIdent34. Number of registers to allocate = 6,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent34 and TxTypeIdent34). TableReadIndex INT Read pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent34 and TxTypeIdent34). TableNoOfObjects INT Number of objects in the ring buffer (Use the same variable for function blocks SendTypeIdent34 och TxTypeIdent34). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

63 TxTypeIdent34 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD) GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD) GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD) GI_NoOfObjects INT Number of objects in the PLC to be read at the General Interrogation. GI_StartAddrD INT First object's dataregister containing the measured value (16-bit). GI_StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 6,5 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 18) in spontaneous communication. DLT IEC System FX3U PLC implementation_ver (126)

64 BlockTx BOOL 1 = Blocks spontaneous sending of messages from the function block RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent34 to TxTypeIdent34. Number of registers to allocate = 6,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent34 and TxTypeIdent34). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent34 and TxTypeIdent34). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent34 and TxTypeIdent34). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

65 3.13 Message Type 35 - Measured value, scaled value (full time tag) Sends measud values ( till 32767) to the supervisory system at the change of the internal relays (bits) (rising edge of the signal only) or if QD (Quality Descriptors) are changed. With full timestamp. Function block SendTypeIdent35 is looking for changes in the internal relays / data registers. Each time a change is detected it is registered into the ring buffer (Table). Max 5041 objects can be stored in the ring buffer. Name Typ e Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD). NoOfObjects INT Number of internal relays (bits) in the PLC to be controlled. StartAddrM INT Start address of the internal relay to be monitored\controlled. (Ex M1800). StartAddrM_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD INT Start address of the data register which contains the value(16-bit). Ex D1800. StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. DLT IEC System FX3U PLC implementation_ver (126)

66 NumberPerScan INT Number of internal relays that are checked each scan (reduce if the CPU load is high) InfoClock InfoClockRet ARRAY [0..4] OF WORD ARRAY [0..4] OF WORD Current time in the PLC (see also "ClockInterruptXms") Current time in the PLC (see also "ClockInterruptXms") TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 6,5 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent35 to TxTypeIdent35. Number of registers to allocate = 6,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent35 and TxTypeIdent35). TableReadIndex INT Read pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent35 and TxTypeIdent35). TableNoOfObjects INT Number of objects in the ring buffer (Use the same variable for function blocks SendTypeIdent35 och TxTypeIdent35). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

67 TxTypeIdent35 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD) GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD) GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD) GI_NoOfObjects INT Number of objects in the PLC to be read at the General Interrogation. GI_StartAddrD INT First object's dataregister containing the measured value (16-bit). GI_StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). 1 object = 6,5 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 18) in spontaneous communication. DLT IEC System FX3U PLC implementation_ver (126)

68 BlockTx BOOL 1 = Blocks spontaneous sending of messages from the function block RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent35 to TxTypeIdent35. Number of registers to allocate = 6,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent35 and TxTypeIdent35). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent35 and TxTypeIdent35). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent35 and TxTypeIdent35). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

69 3.14 Message Type 36 - Measured value, short floating point value Send floating-point value to the supervisory system at the status change of the internal relays(only on the rising edge of the signal) or if QD (Quality Descriptors) are changed. With full timestamp. Function block SendTypeIdent36 is looking for changes in the internal relays / data registers. Each time a change is detected it is registered into the ring buffer (Table). Max 4368 objects can be stored in the ring buffer. Name Typ e Explanation ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrMOffBit). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrMOffBit). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrMOffBit). NoOfObjects INT Number of internal relays (bits) in the PLC to be controlled. StartAddrM INT Start address of the internal relay to be monitored\controlled. (Ex M1900). StartAddrM_copy INT Start address of the copy of the internal relay. This copy is used for the detection of signal changes. StartAddrD INT Start address of the data register which contains the floating point value. Note: each floating-value occupies 2 data registers(32-bit value). StartAddrD_QD INT Start address of Quality Descriptors. One dataregister/object. DLT IEC System FX3U PLC implementation_ver (126)

70 StartAddrD_QD_copy INT Start address of the copy of the internal dataregister. This copy is used for the detection of value changes. EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. NumberPerScan INT Number of internal relays that are checked each scan (reduce if the CPU load is high) InfoClock InfoClockRet ARRAY [0..4] OF WORD ARRAY [0..4] OF WORD Current time in the PLC (see also "ClockInterruptXms") Current time in the PLC (see also "ClockInterruptXms") TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). Table ARRAY [0..0] OF WORD 1 object = 7,5 registers. Temporary ring buffer (buffer table) for the value of SendTypeIdent36 to TxTypeIdent36. Number of registers to allocate = 7,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent36 and TxTypeIdent36). TableReadIndex INT Read pointer to the ring buffer (Use the same variable for function blocks SendTypeIdent36 and TxTypeIdent36). TableNoOfObjects INT Number of objects in the ring buffer (Use the same variable for function blocks SendTypeIdent36 and TxTypeIdent36). Maximum of objects to buffer in table is DLT IEC System FX3U PLC implementation_ver (126)

71 TxTypeIdent36 sends the values contained in the ring buffer (Table) when it is ready to send. Name Type Explanation ConnectionOK BOOL 1 = connection ready to send message ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 GI_ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD) GI_ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD) GI_ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD) GI_NoOfObjects INT Number of objects in the PLC to be read at the General Interrogation. GI_StartAddrD INT Start address of the data register which contains the floating point value, at the General Interrogation. Obs: each floating point value object occupies 2 dataregister (32-bit value). GI_StartAddrD_QD INT Start address of Quality Descriptors, at General Interrogation. One dataregister/object. GI_EnableQD BOOL 0 = Quality Descriptors not used, 1 = Quality Descriptors used. GI_Block BOOL 1 = blocking General Interrogation (GI). TableBufferMaxNoOfObj INT Max number of objects to buffer in "Table" (if no communication for instance). DLT IEC System FX3U PLC implementation_ver (126)

72 1 object = 7,5 registers. MaxNoOfObjects INT Maximum number of allowable objects in a message to be sent (max 15) in spontaneous communication. BlockTx BOOL 1 = Blocks spontaneous sending of messages from the function block RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). Table ARRAY [0..0] OF WORD Temporary ring buffer (buffer table) for the value of SendTypeIdent36 to TxTypeIdent36. Number of registers to allocate = 7,5 * TableBufferMaxNoOfObj. Note! The allocation is done in the GVL, no need to change the Table array size though! TableWriteIndex INT Write pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent36 and TxTypeIdent36). TableReadIndex INT Read pointer to the ring buffer (use the same variables for the function blocks SendTypeIdent36 and TxTypeIdent36). TableNoOfObjects INT Number of object in the ring buffer (Use the same variable for function blocks SendTypeIdent36 and TxTypeIdent36). TxBuffer ARRAY [0..127] OF INT Maximum of objects to buffer in table is Send Buffer from the PLC. GI_Start BOOL Start an General Interrogation (ie polling), sends the current status of data register (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

73 3.15 Message Type 45 - Single command. Receiving a command from supervisory system to either set or reset a internal relay. First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. The object address in the select and execute commands is checked to be identical. Execute must come after max XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay(bit) (StartAddrM) ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay(bit) (StartAddrM) ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay(bit) (StartAddrM) MaxNoOfObjects INT Max number of objects (starting from StartAddrM) StartAddrM INT Start address of the internal relay to be monitored\controlled. For example, M2000. Block BOOL Blocks the activation of internal relays (the execution of the FB). EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent45" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent45" more than once in the program (ie "wrong address objects" will not occur in that case). TimeOut INT Value of the time-out timer. Ex 4,0 sec. DLT IEC System FX3U PLC implementation_ver (126)

74 RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

75 3.16 Message Type 45 - Single command (with select verifying). Receiving a command from supervisory system to either set or reset an object. First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. At a select-command the "SelectOut" is ON for one pulse for the object. PLC then waits for the "SelectIn" to be ON for the selected object and then sends a confirmation that the selection is correct. If this signal is not activated within the timeout period (eg 4.0 sec) then the PLC sends a negative confirmation (P / N = 1, see chap. 4.13). The object address in the select and execute commands is checked to be identical. Execute must come last XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay(bit) (StartAddrM). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay(bit) (StartAddrM). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay(bit) (StartAddrM). MaxNoOfObj INT Max number of objects (starting from StartAddrM) DLT IEC System FX3U PLC implementation_ver (126)

76 StartAddrMSelectIn INT Signal to the first object indicating that the object is selected. Ex M2000. StartAddrMSelectOut INT Signal to the first object, indicating that the object must be selected. Ex M2200. This signal is only ON for one scan. StartAddrM INT Start address of the internal relay to be monitored\controlled. For example, M2300. Block BOOL Blocks the activation of internal relays. EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent45Select" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent45Select" more than once in the program (ie "wrong address objects" will not occur in that case). TimeOut INT Value of the time-out timer. Ex 4,0 sec. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

77 3.17 Message Type 46 - Double command. Receiving a command from supervisory system to either set or reset a internal relay. The object has an ON and OFF bit for 2 bit status, for example circuit breakers. First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. The object address in the select and execute commands is checked to be identical. Execute must come after max XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay(bit) (StartAddrMxxx) ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay(bit) (StartAddrMxxx) ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay(bit) (StartAddrMxxx) MaxNoOfObj INT Max number of objects (starting from StartAddrMxxx) StartAddrMOffBit INT The OFF bit (of a 2 bit status) of the start address (M) to be monitored\controlled (all the signals must be consecutively). Ex M2400. StartAddrMOffBitn INT The ON bit (of a 2 bit status) of the start address (M) to be monitored\controlled (all the signals must be consecutively). Ex M2420. Block BOOL Blocks the activation of internal relays. DLT IEC System FX3U PLC implementation_ver (126)

78 EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent46" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent46" more than once in the program (ie "wrong address objects" will not occur in that case). TimeOut INT Value of the time-out timer. Ex 4,0 sec. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

79 3.18 Message Type 46 - Double command (with select verifying). Receiving a command from supervisory system to either set or reset an object. The object has an ON and OFF bit for 2 bit status, for example circuit breakers. First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. At a select-command the "SelectOut" is ON for one pulse for the object. PLC then waits for the "SelectIn" to be ON for the selected object and then sends a confirmation that the selection is correct. If this signal is not activated within the timeout period (eg 4.0 sec) then the PLC sends a negative confirmation (P / N = 1, see chap. 4.14). The object address in the select and execute commands is checked to be identical. Execute must come last XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay(bit) (StartAddrMxxx) ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay(bit) (StartAddrMxxx) ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay(bit) (StartAddrMxxx) DLT IEC System FX3U PLC implementation_ver (126)

80 MaxNoOfObj INT Max number of objects (starting from StartAddrMxxx) StartAddrMSelectIn INT Signal to the first object indicating that the object was selected. Ex M2500. StartAddrMSelectOut INT Signal to the first object, indicating that the object must be selected. Ex M2520. This signal is only updated at the end of scan. StartAddrMOffBit INT The OFF bit (of a 2 bit status) of the start address (M) to be monitored\controlled (all the signals must be consecutively). Ex M2540. StartAddrMOffBit INT The ON bit (of a 2 bit status) of the start address (M) to be monitored\controlled (all the signals must be consecutively). Ex M2560. Block BOOL Blocks the activation of internal relays. EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent46Select" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent46Select" more than once in the program (ie "wrong address objects" will not occur in that case). TimeOut INT Value of the time-out timer. Ex 4,0 sec. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

81 3.19 Message Type 47 Regulating step command Receiving a command from supervisory system to either set the bit "higher" and reset the bit "lower" or vice versa. First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. There is the possibility to reset the internal relays ( higher - and lower -signals) if desired. The object address in the select and execute commands is checked to be identical. Execute must come last XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first internal relay(bit) (StartAddrMxxx). ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first internal relay(bit) (StartAddrMxxx). ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first internal relay(bit) (StartAddrM_xxx). MaxNoOfObj INT Max number of objects (starting from StartAddrMxxx) StartAddrMStepHigher INT First object s "higher"-signal. Ex M2600. StartAddrMStepLower INT First object s lower -signal. Ex M2620. DLT IEC System FX3U PLC implementation_ver (126)

82 Block BOOL Blocks the activation of internal relays. EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent47" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent47" more than once in the program (ie "wrong address objects" will not occur in that case). TimeOut INT Value of the time-out timer. Ex 4,0 sec. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

83 3.20 Message Type 48 - Set-point Command, normalised value Receiving a command from supervisory system to write a data value to a dataregister. First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. The object address in the select and execute commands is checked to be identical. Execute must come last XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD) ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD) ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD) MaxNoOfObj INT Max number of objects (starting from StartAddrD) StartAddrD INT Start address of the data register in which data is written. For example, D2700. Block BOOL Blocks the activation of the writing to dataregisters. EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent48" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent48" more than once in the program (ie "wrong address objects" will not occur in that case). DLT IEC System FX3U PLC implementation_ver (126)

84 TimeOut INT Value of the time-out timer. Ex 4,0 sec. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

85 3.21 Message Type 49 - Set-point Command, scaled value Receiving a command from supervisory system to write a data value ( ) to a dataregister. First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. The object address in the select and execute commands is checked to be identical. Execute must come last XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD) ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD) ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD) MaxNoOfObj INT Max number of objects (starting from StartAddrD) StartAddrD INT Start address of the data register in which data is written. For example, D2720. Block BOOL Blocks the activation of the writing to dataregisters. EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent49" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent49" more than once in the program (ie "wrong address objects" will not occur in that DLT IEC System FX3U PLC implementation_ver (126)

86 case). TimeOut INT Value of the time-out timer. Ex 4,0 sec. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

87 3.22 Message Type 50 - Set-point Command, short floating point value Receiving a command from supervisory system to write a data value (floating point) to a 32-bit dataregisters (ie DINT). First (if necessary) the supervisory (controlling) system sends a select-command with the object address to be changed, then it sends an execute command which set/reset the internal relay. The object address in the select and execute commands is checked to be identical. Execute must come last XX seconds (timeout) after the select to be valid. The PLC also check so the ASDU-address is correct and that the object number does not exceeds the setting of MaxNoOfObjects. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer in the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ObjectAddrByte3 INT Object address (octet 3) of the RTU for the first dataregister (StartAddrD) ObjectAddrByte2 INT Object address (octet 2) of the RTU for the first dataregister (StartAddrD) ObjectAddrByte1 INT Object address (octet 1) of the RTU for the first dataregister (StartAddrD) MaxNoOfObj INT Max number of objects (starting from StartAddrD) StartAddrD INT Start address of the data register in which data is written. For example, D2740. Note: Each floating point object occupies 2 dataregisters (32-bit ). Block BOOL Blocks the activation of the writing to dataregisters. EnableMultipleFB BOOL 0 = When the function block "RxTypeIdent50" only is used once in the program. 1 = Enables the use of function block " RxTypeIdent50" more than DLT IEC System FX3U PLC implementation_ver (126)

88 once in the program (ie "wrong address objects" will not occur in that case). TimeOut INT Value of the time-out timer. Ex 4,0 sec. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. Selected BOOL Signal which is activated when an object is selected. Reset after execution or when timeout. DLT IEC System FX3U PLC implementation_ver (126)

89 3.23 Message Type 58 - Single command with full time tag Same as message 45 (see Chap. 3.15), only difference is that this is also sent with full timestamp from supervisory system. PLC then returned the same time received Message Type 59 - Double command with full time tag Same as message 46 (see Chap. 3.17), only difference is that this is also sent with full timestamp from supervisory system. PLC then returned the same time received. DLT IEC System FX3U PLC implementation_ver (126)

90 3.25 Message Type 63 - Set point command, short floating point value, with full time tag Same as message 50 (see Chap. 3.22), only difference is that this is also sent with full timestamp from supervisory system. PLC then returned the same time received. DLT IEC System FX3U PLC implementation_ver (126)

91 3.26 Messagee Type 70 - End of initialisation Sends information to the supervisory system (see below "Cause_init" or "Param_mode") when StartSend is activated. Name Type Explanation BlockTx BOOL 1 = Blocks sending of messages from the function block. ConnectionOK BOOL 1 = OK to send message ASDUAddrByte2 INT PLC adress (oktet 2). ASDUAddrByte1 INT PLC adress (oktet 1). CauseOfInit INT 0 = Local power switch on 1 = Local manual reset 2 = Remote reset ParameterMode INT 0 = initialisation with unchanged local parameters 1 = initialisation after change of local parameters StartSend BOOL 1 = Sends the message with the information contained in "Cause_init" or "Param_mode". Reset automatically when sending is done. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. DLT IEC System FX3U PLC implementation_ver (126)

92 3.27 Message Type Interrogation command Receiving Interrogation command (polling) and commanding the other blocks to send all their information (without any time-stamping!). The command is given eg at communications startup. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer to the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ConnectionOK BOOL 1 = OK to send message Block BOOL Blocking (incoming message is ignored) RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Interrogation BOOL Send buffer from the PLC. Signals an Interrogation request (must be reset when Interrogation is complete). (GI = General Interrogation). DLT IEC System FX3U PLC implementation_ver (126)

93 3.28 Message Type Clock synchronisation command Message from the supervisory system with the current time. PLC sets its internal clock. PLC sends back the time that PLC had when the synchronization command was received. Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer to the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 InfoClock ARRAY [0..4] OF WORD Current time in the PLC ConnectionOK BOOL 1 = OK to send message Block BOOL Blocking transmission from the PLC. RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register(number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. ClockMs WORD Data register containing the current time in milliseconds (obtained from the function block "ClockInterruptXms"). SetSummertime BOOL Daylight saving setting is activated. Used in function blocks for PLC clock. DLT IEC System FX3U PLC implementation_ver (126)

94 3.29 Message Type Reset process command Reset command (reset of process, for example). Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer to the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 ConnectionOK BOOL 1 = OK to send message Block BOOL Blocking (incoming message is ignored) RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. GeneralReset BOOL (General reset of process) Bit set by the function block when the function is activated. 1=General reset of process. Reset manually when done!! (it is not done automatically) ResetPendingInfo BOOL (Reset of pending information with time tag of the event buffer) Bit set by the function block when the function is activated. 1=Reset of pending information with time tag of the event buffer. Reset manually when done!! (it is not done automatically) DLT IEC System FX3U PLC implementation_ver (126)

95 3.30 Message Type Test command with full time tag Name Type Explanation RxBuffer ARRAY [0..127] OF INT Receive buffer to the PLC. ASDUAddrByte2 INT PLC address octet 2 ASDUAddrByte1 INT PLC address octet 1 Block BOOL Blocking (incoming message is ignored) RxStatus INT Receive Status Register (the number of bytes received). TxStatus INT Send Status Register (number of bytes to be sent). TxBuffer ARRAY [0..127] OF INT Send buffer from the PLC. TestSequenceCounter WORD Incoming data value (test counter). DLT IEC System FX3U PLC implementation_ver (126)

96 3.31 ClockInterruptXms This function block is placed in a POU which is linked to a task with maximum interrupt internal time factor priority. The function block uses the PLC clock for date and time, but does the calculation of milliseconds (ClockMs) by it self. The clock has a resolution of 10 milliseconds. If you don t want to modify the interrupt interval in the POU, a global constant can be declared and linked to the InterruptInterval variable. Then the current time base (resolution) can be set in a single place, in the Global Variable List (GVL). Name Type Explanation InterruptInterval INT Interval at which interrupt occurs, measured in ms (10 = 10ms interrupt). SummerTime BOOL 1 = summer time (see also Chap. 3.33) ClockMs WORD Register that store milliseconds. ClockInfo ClockInfoRet DateRead ARRAY [0..4] OF WORD ARRAY [0..4] OF WORD ARRAY [0..6] OF WORD An array containing the current time in a format other function blocks can use. The same information as in ClockInfo but the information is shifted one byte for easier handling of certain types of communication. Date / Time PLC (used in the function block SummerTime, see chap 3.33). DLT IEC System FX3U PLC implementation_ver (126)

97 3.32 ClockNoInterrupt This function block has the same function as "ClockInterruptXms" but does not run on an interrupt. This function block checks the current scantime instead and updates ClockInfo". This function block has not the same good resolution (precision) compared to the function block "ClockInterruptXms". Name Type Explanation ScanTime0_1ms INT PLC scan time in 0.1ms (ex value 250 = 25.0 ms). SummerTime BOOL 1=Summer time ClockMs WORD Registers that stores the time in milliseconds ClockInfo ARRAY [0..4] OF WORD ClockInfoRet ARRAY [0..4] OF WORD An array containing the current time in a format other function blocks can use. The same information as in ClockInfo but the information is shifted one byte for easier handling of certain types of communication. DLT IEC System FX3U PLC implementation_ver (126)

98 3.33 SummerTime This function block sets a internal relay when it is summer time (last Sunday in March at until the last Sunday in October at 03.00). Name Type Explanation DateInput ARRAY [0..6] OF WORD Date/time. Date_in[x]: [0] = Year (ex. 2006) [1] = Month (ex. 12) [2] = Day (ex. 31) [3] = Hour (ex. 14) [4] = Minute (ex. 58) [5] = Second (ex. 26) SummerTime BOOL 0 = winter, 1 = summer [6] = Weekday (1 = Monday, 2 = Tuesday,..., 6 = Saturday, 0 = Sunday) DLT IEC System FX3U PLC implementation_ver (126)

99 3.34 Function Block info number of steps Number of steps for the basic program (ie function blocks below are not included) is as follows: When only 1 port is configured: approximately 3000 steps When 2 ports are configured: approximately 4600 steps (For each additional port that is configured this takes about 1600 steps) Name Steps Words Bits Timers Labels RxTypeIdent RxTypeIdent45Select RxTypeIdent RxTypeIdent46Select RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RxTypeIdent RingBufferTypeIdent RingBufferTypeIdent SendTypeIdent SendTypeIdent SendTypeIdent SendTypeIdent SendTypeIdent1and SendTypeIdent30and SendTypeIdent SendTypeIdent SendTypeIdent SendTypeIdent TxTypeIdent TxTypeIdent DLT IEC System FX3U PLC implementation_ver (126)

100 TxTypeIdent TxTypeIdent TxTypeIdent1and TxTypeIdent30and TxTypeIdent TxTypeIdent TxTypeIdent TxTypeIdent FB_TxIdent DLT IEC System FX3U PLC implementation_ver (126)

101 4 Annexes - Message Building 4.1 Message Type 1 (Single-point information without time tag) DLT IEC System FX3U PLC implementation_ver (126)

102 4.2 Message Type 3 (Double-point information without time tag) DLT IEC System FX3U PLC implementation_ver (126)

103 4.3 Message Type 5 (step position information without time tag) DLT IEC System FX3U PLC implementation_ver (126)

104 4.4 Message Type 9 (Measured value, normalised value) DLT IEC System FX3U PLC implementation_ver (126)

105 4.5 Message Type 11 (Measured value, scaled value) DLT IEC System FX3U PLC implementation_ver (126)

106 4.6 Message Type 13 (Measured value, short floating point value) DLT IEC System FX3U PLC implementation_ver (126)

107 4.7 Message Type 30 (Single-point information with full time tag) DLT IEC System FX3U PLC implementation_ver (126)

108 4.8 Message Type 31 (Double-point information with full time tag) DLT IEC System FX3U PLC implementation_ver (126)

109 4.9 Message Type 32 (Step position information full time tag) DLT IEC System FX3U PLC implementation_ver (126)

110 4.10 Message Type 34 (Measure value, normalised value full time tag) DLT IEC System FX3U PLC implementation_ver (126)

111 4.11 Message Type 35 (Measure value, scaled value full time tag) DLT IEC System FX3U PLC implementation_ver (126)

112 4.12 Message Type 36 (Measure value, floating point value full time tag) DLT IEC System FX3U PLC implementation_ver (126)

113 4.13 Message Type 45 (Single command) DLT IEC System FX3U PLC implementation_ver (126)

114 4.14 Message Type 46 (Double command) DLT IEC System FX3U PLC implementation_ver (126)

115 4.15 Message Type 47 (Regulating step command) DLT IEC System FX3U PLC implementation_ver (126)

116 4.16 Message Type 48 (Set-point command, normalised value) DLT IEC System FX3U PLC implementation_ver (126)

117 4.17 Message Type 49 (Set-point command, scaled value) DLT IEC System FX3U PLC implementation_ver (126)

118 4.18 Message Type 50 (Set-point command, short floating point value) DLT IEC System FX3U PLC implementation_ver (126)

119 4.19 Message Type 58 (Single command with full time tag) DLT IEC System FX3U PLC implementation_ver (126)

120 4.20 Message Type 59 (Double command with full time tag) DLT IEC System FX3U PLC implementation_ver (126)

121 4.21 Message Type 63 (Set-point command, short floating point value, with full time tag) DLT IEC System FX3U PLC implementation_ver (126)

122 4.22 Message Type 70 (End of initialisation) DLT IEC System FX3U PLC implementation_ver (126)

123 4.23 Message Type 100 (Interrogation command) DLT IEC System FX3U PLC implementation_ver (126)

124 4.24 Message Type 103 (Clock synchronisation command) DLT IEC System FX3U PLC implementation_ver (126)

125 4.25 Message Type 105 (Reset process command) DLT IEC System FX3U PLC implementation_ver (126)

126 4.26 Message Type 107 (Test command) DLT IEC System FX3U PLC implementation_ver (126)