Voltage regulator TAPCON 240

Voltage regulator TAPCON 240 Supplement 2398420/00 Protocol description SPA-Bus

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Table of Contents Table of Contents 1 General... 5 1.1 About this document... 5 1.2 Introduction... 5 1.3 Bus and protocol definitions... 6 2 Voltage regulator connections... 7 3 Settings on the voltage regulator... 9 3.1 Interfaces on the CIC card... 9 4 Message formats... 10 5 Communication between master and slaves... 11 5.1 Data read from slave... 11 5.2 Direct data write to slave... 11 5.3 Simultaneous write to all slaves using the broadcast address... 12 6 Device data points... 13 Maschinenfabrik Reinhausen 2010 2398420/00 EN TAPCON 240 3

1 General 1 General 1.1 About this document This document describes implementation of the interface protocol SPA-Bus for the TAPCON 240. Read this description along with the technical file for the TAPCON 240. Parts of this supplement are taken from the technical description "SPA-Bus Communication Protocol V2.5" (1MRS 750076-MTD EN) from ABB. 1.2 Introduction The SPA-bus was originally designed as a fieldbus in a distributed protection, control and event reporting system. The system may incorporate slave units as protective relays, control units and alarm units connected over the SPAbus to a master unit. In addition to this the bus can be used to transfer data to and from other units of a secondary equipment system in a substation of an electrical power network. Defined in this document is the communication protocol used in communications over the SPA-bus. Maschinenfabrik Reinhausen 2010 2398420/00 EN TAPCON 240 5

1 General 1.3 Bus and protocol definitions The SPA-bus uses an asynchronous serial communications protocol (1 start bit, 7 data bits + even parity, 1 stop bit) with data transfer rate of 9.6 kb/s. Messages on the bus consist of ASCII characters. The bus can support one master and several slaves. The basic construction of the protocol assumes that the slave has no selfinitiated need to talk to the master but the master is aware of the data contained in the slaves and, consequently, can request required data. In addition, the master can send data to the slave. Requesting by the master can be performed either by sequenced polling (e.g. for event information) or only on demand. The master requests slave information using request messages and sends information to the slave in write messages. Furthermore, the master can send all slaves in common a broadcast message containing time or other data. The inactive state of bus transmit and receive lines is a logical "1". 6 TAPCON 240 2398420/00 EN Maschinenfabrik Reinhausen 2010

2 Voltage regulator connections 2 Voltage regulator connections The physical interfaces RS232, RS485 and optional fiber-optic cables are provided on the Voltage regulator for data transfer via the SPA-Bus protocol. Figure 1 CIC card 1 RS232 (9 pin female SUB-D connector) 2 RS485 3 Ethernet RJ45 (optional) 4 FH-ST or F-SMA fiber-optic cable in 850 nm or 660 nm (optional) 5 Reset key 6 TxD LED for transmit signal 7 RxD LED for receive signal 8 Clk LED for operating mode (flashes for 2 seconds) 9 Clip for connecting cable shield with functional ground Maschinenfabrik Reinhausen 2010 2398420/00 EN TAPCON 240 7

2 Voltage regulator connections RS232 RS485 Fiber-optic cable (optional) 9 pin female SUB-D connector Pin 2: TxD Pin 3: RxD Pin 5: GND 3 pin connector from Phoenix (MC1.5/3 GF 3.5) Pin 1: GND (100 Ω ground resistance) Pin 2: B (inverted) Pin 3: A (not inverted) Polarity: A > B by 200 mv corresponds to 1. A < B by 200 mv corresponds to 0. An interrupted communication line corresponds to 1. The start bit has the designation 0. Recommended terminating resistor 120 Ω. FH-ST (850 nm or 660 nm) F-SMA (850 nm or 660 nm) Table 1 Interfaces available Transfer on physical plane: Asynchronous with 7 data bits, even parity, 1 stop bit (7E1) 8 TAPCON 240 2398420/00 EN Maschinenfabrik Reinhausen 2010

3 Settings on the voltage regulator 3 Settings on the voltage regulator The following chapters describe how to set the parameters for communication at the relevant interface on the TAPCON 240. > Configuration > Next* > Comm. interface Depending on the product version and software, you will need to press "Next" a varying number of times to reach the "Comm. interface" menu. You will find more information on how to set the parameters in the technical file for TAPCON 240. 3.1 Interfaces on the CIC card Communication interface RS232, RS485, fiber-optic cable (optional) Baud rate communication 9.6 kilobaud SCADA address selectable between 1...999 Send delay time Delay until response is sent Fiber-optic cable light ON/OFF Definition of logical level for fiber-optic cable Table 2 Settings for interfaces Maschinenfabrik Reinhausen 2010 2398420/00 EN TAPCON 240 9

4 Message formats 4 Message formats The messages only include printable ASCII characters (0AH, 0DH, 20H,..., 7EH). Messages sent by the master are started with a begin bracket ">", and the slave messages start with characters "lf<". The master messages end with character "cr" (0DH) while the slave messages end with characters "crlf" (0DH and 0AH). The slave can use character "&" to indicate continuation of the message on the next line. The maximum total length of the message is limited to 255 characters. No restrictions are set to the number of lines as far as the message maximum length is not exceeded. Master messages are always in a single-line format. The master message has the following format: > nte/exm/m: xxxx/xxxx/xxx/xx: CC cr Start character Header Data part Checksum Stop character The slave message format is as follows: lf< nt: xxxx/xxxx/xxx: CC crlf Start characters or Header Data part Checksum Stop characters lf< nt: xxxx/xx&crlfxx/xxx: CC crlf Start characters Header where n = slave number T = message type code e = channel number e/e = first/last channel x = data category code (data type) m = data number m/m = first/last data Data part with continuation character "&" Checksum Stop characters The delimiter character ":" separates the message header from the data part and the data part from the checksum, respectively. 10 TAPCON 240 2398420/00 EN Maschinenfabrik Reinhausen 2010

5 Communication between master and slaves 5 Communication between master and slaves 5.1 Data read from slave 1. Master sends a read message 2. Slave replies with a data message Master Slave R ========> <======== D Example: Variable 7 of channel 0 (manual/auto) of slave 2 is requested by the master using message: >2R0V7:XXcr The slave replies the request by message: lf<2d:1:xxcrlf 5.2 Direct data write to slave 1. Master sends data to slave 2. Slave acknowledges data Master Slave W ========> <======== A Example: Variable 7 of channel 0 (manual/auto) of slave 2 is written with the value 1 by the master using message: >2W0V7:1:XXcr The slave replies the request by message: lf<2a:xxcrlf Maschinenfabrik Reinhausen 2010 2398420/00 EN TAPCON 240 11

5 Communication between master and slaves 5.3 Simultaneous write to all slaves using the broadcast address 1. Master sends data to all slaves (No acknowledgment is sent by the slaves.) Master Slave W ========> Example: Master sends clock message: >900WT:37.271:XXcr 12 TAPCON 240 2398420/00 EN Maschinenfabrik Reinhausen 2010

6 Device data points 6 Device data points Address Read Write Event on Event off Description 0I1 R - - - Apparent current (percentage) 0I2 R - - - Deviation (percentage) 0I3 R - - - Active current (percentage) 0I4 R - - - Actual voltage (volts) 0I5 R - - - Reactive current (percentage) 0I7 R - - - Tap position 0O10 - W - - Raise If 1 is written, the TAPCON 240 will make a switching pulse in the voltage raise direction. The TAPCON 240 has to be in manual mode. 0O11 - W - - Lower If 1 is written, the TAPCON 240 will make a switching pulse in the voltage lower direction. The TAPCON 240 has to be in manual mode. 0S1 R W - - Voltage level (volts) 0S2 R - - - Reserved value 0S3 R - - - Reserved value 0S4 R - - - Reserved value 0S5 R - - - Reserved value 0S7 R - - - Reserved value 0S9 R - - - Reserved value 0S10 R - - - Reserved value 0S11 R - - - Reserved value 0S12 R - - - Reserved value 0S13 R - - - Reserved value 0S15 R - - - Reserved value 0S16 R - - - Reserved value 0S17 R - - - Reserved value 0S20 R - - - Reserved value 0S21 R - - - Reserved value 0S22 R - - - Reserved value 0S23 R - - - Reserved value Maschinenfabrik Reinhausen 2010 2398420/00 EN TAPCON 240 13

6 Device data points Address Read Write Event on Event off Description 0V6 R - 2 1 Local/Remote 1: Remote 0: Local The TAPCON 240 has no local/remote-switch. It can be parameterized to use an input signal for "local". 0V7 R W 3 4 Manual/Auto 1: Auto 0: Manual 0V8 R W 6 5 Parallel control 1: Parallel control mode "Circulating current" 0: Parallel control off Status 1 for "Circulating current" is fed back if parallel operation is actually active. Parallel control on/off can only be written with some versions of the TAP- CON 240 software. Normally parallel control on/off is only an indication of the actual status of the TAPCON 240. 0V9 R W - - Reserved status 11 0V11 R - 15 16 Motor drive running 0V12 R - - - Reserved 0V13 R W 21 22 Parameterizable indication no. 2 The TAPCON 240 has four parameterizable indications. These can be set to an input or to a relay. The indications will be 1 if there is a signal at the parameterized input or if the parameterized relay is ON. 0V14 R W 23 24 Reserved status 1 0V15 R - 25 26 Status of overvoltage U> 0: No overvoltage 1: Overvoltage 0V16 R - 27 28 Status of undervoltage U< 0: No undervoltage 1: Undervoltage 0V17 R - 29 30 Status of overcurrent I> 0: No overcurrent 1: Overcurrent 0V18 R - 31 32 Status of parallel control error 0: No parallel control error 1: Parallel control error 14 TAPCON 240 2398420/00 EN Maschinenfabrik Reinhausen 2010

6 Device data points Address Read Write Event on Event off Description 0V19 R W 33 34 Parameterizable indication no. 1 0V20 R W - - SI command 1 0V21 R W - - SI command 2 0V22 R W - - SI command 3 Each of the three "SI commands" sets a corresponding flag in the TAPCON 240. The status of the flags can be used like an input of the IO or UC module to activate or deactivate a function of the TAPCON 240. Example: If the "Input parallel group 1" parameter is set to "SI:cmd1" for two TAPCONs, then parallel control of these TAPCONS can be switched on/off by setting "SI command 1" on/off for both TAPCONs. 0V26 R - 45 46 Parameterizable indication no. 3 0V27 R W - - Parallel control mode "master" 0V28 R W - - Parallel control mode "follower" 0V33 R - - - Function monitoring error (15 minutes supervision) 0: No function monitoring error 1: Function monitoring error 0V35 R W - - Parallel control mode "circulating current" (status message indicating whether parallel operation is running on circulating reactive current) The TAPCON 240 has to be in parallel operation. 0V36 R W - - Parameterizable indication no. 4 0V37 R W - - Reserved status 8 0V38 R W 41 42 Reserved status 9 0V39 R W 43 44 Reserved status 10 0V40 R W - - Voltage level raise/lower Write 1 to raise voltage level one step Write 0 to lower voltage level one step The voltage level is changed in parameterized steps. Only available if the "voltage level delta" parameter in the TAPCON 240 is not zero. Maschinenfabrik Reinhausen 2010 2398420/00 EN TAPCON 240 15

6 Device data points Address Read Write Event on Event off Description 0V40 0V41 0V42 R R R W W W - - - - - - Voltage level 1 Voltage level 2 Voltage level 3 Indication/command for selected voltage level. The commands are available if the "voltage level delta" parameter in the TAPCON 240 is zero and the position of the inputs for remote control of voltage level 2/3 is off. The TAPCON 240 can be parameterized to set 32 bits in the dual port RAM to the SI module according to the signals at some IO or UC inputs. If this function is enabled, the 32 bits are sent to SPA bus as 0V50..0V81. - - - 50 This event follows an interface module reset. - - - 51 This event follows an internal event buffer overflow. Table 3 Device data points 16 TAPCON 240 2398420/00 EN Maschinenfabrik Reinhausen 2010

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