TOSVERT VF-S9 Communications Function Instruction Manual Notice 1. Make sure that this instruction manual is delivered to the end user of the inverter. 2. Read this manual before first using the communications function, and keep it handy as a reference for maintenance and inspections. * The contents of this manual are subject to change without notice. TOSHIBA SCHNEIDER INVERTER CORPORATION 2002 All rights reserved.
Preface Thank you for purchasing a Tosvert VF-S9 series of inverter. Every VF-S9 series of inverter has a communication port as standard equipment, so that data can be transmitted between it and a personal computer via an optional RS232C converter (RS2001Z) or RS485 converter (RS4001Z), cable with RS232C converter (RS20035-0). To use the communications function of the VF-S9 correctly, please read this manual carefully before use and keep it in a safe place. Also, make sure that this manual is stored close to the inverter so that it can be consulted anytime as a reference for maintenance and inspections. Notice The EEPROM (Electrically Erasable Programmable Read-Only Memory) is good for 10,000 times of reprogramming. Unless it is absolutely necessary to store data into the EEPROM, use the P command to write data into the RAM. Do not rewrite data into the same parameter stored in the EEPROM more than 10,000 times, using the W command*. (*: Command allowing you to write data into both the RAM and the EEPROM). Reference 13, 14 Examples in this manual are based on the assumption that communications take place between one inverter and one computer. If connecting two or more inverters to the same network, you will need to assign a number to each of them. Failure to do so will cause a data crash and result in a communications error. 7, 10
Contents 1. General outlines of the communications function 2 2. Data transmission specifications 3 3. Exchange of data between the computer and the VF-S9 4 3.1. Brief explanation of the sequence 4 3.2. Transmission errors 6 4. Data transmission formats 7 4.1. Data transmission formats used in ASCII mode 7 4.2. Data transmission formats used in binary mode 10 5. Data transmission commands 13 5.1. Commands available in ASCII mode 13 5.2. Commands available in binary mode 14 6. Communication parameters 16 7. Commands and monitoring from the computer 18 7.1. Communication commands (commands from the computer) 18 7.2. Monitoring from the computer 20 8. Functions 22 8.1. Timer function 22 8.2. Broadcast communications function 23 8.3. Inverter-to-inverter communications function (For V110 and later) 25 8.3.1. Proportional-speed control (For V110 and later) 27 8.4. Send wait time setting function (for V110 and later) 28 9. Examples of the use of communication commands 29 10.Examples of RS232C communication programs 31 11.Parameter data 34 11.1. Table of parameters 34 11.2. Table of trip codes 42 11.3. Alarm codes 43 Appendix 1 How to check the CPU version 44 Appendix 2 Table of data codes 44 2
1. General outlines of the communications function The TOSVERT VF-S9 series of inverters can be connected to a computer or a controller (hereinafter referred to as the computer) for data communications via RS232C converter (RS2001Z) or RS485 converter (RS4001Z), cable with RS232C converter (RS20035-0). By writing computer programs, you can monitor the operating status of the inverter, control its operation in various ways from the computer, and change and store parameter settings on floppy disks. The communications function allows the transfer of the following information. Monitoring function (used to monitor the operating status of the inverter: Output frequency, current, voltage, etc.) Command function (used to issue run, stop and other commands to the inverter) Parameter function (used to set parameters and read their settings) Additional function (Timer function allowing the detection of breaks in cables) As for data communications codes, the TOSVERT VF-S9 series of inverters support the binary (HEX) code, in addition to the JIS (ASCII) code. The communications function is designed on the assumption that the JIS (ASCII) code is used for communications between the inverter and the personal computer, and the binary (HEX) code for communications between the inverter and the microcomputer built into the controller. A communication number is used to access the desired data item. Commands and frequency instructions from the computer have priority (over those from the operation panel or terminal board.) To take advantage of this feature, however, you need to enable the mode in which commands and frequency instructions from the computer are valid, regardless of the settings of the command mode selection parameter ( ) or that of the frequency setting mode selection parameter ( ). For the way of enabling it, see 7, Commands and monitoring from the computer. The smallest unit of information that computers handle is called a bit (binary digit), which represents the two numbers in the binary system: 1 or 0. A group of 16 bits is referred to as a word, which is the basic unit of information the VF-S9 series of inverters use for data communications. One word can handle data items of 0 to FFFFH in hexadecimal notation (or 0 to 65535 in decimal notation). BIT15 BIT8 BIT7 BIT0 1 word 1 bit 3
2. Data transmission specifications Items Specifications Data transmission Half-duplex scheme Connection control Centralized control *1 scheme Synchronization Start-stop synchronization scheme Communication baud VF-S9: 9600 baud (Standard default setting) rate Selectable among 1200/2400/4800/9600/19200 baud (Operation panel/computer) *2 Data transmission ASCII mode: *2 and *3 code JIS-X-0201 (ASCII), fixed to 8 bits, even/odd/non parity Binary mode: *2 and *3 Binary (HEX) code, fixed to 8 bits, even/odd/non parity Error detecting Parity, checksum scheme Character Receive: 11 bits *4, Send: 12 bits *4 transmission format Order of bit Low-order bits transmitted first transmission Frame length Variable (to a maximum of 17 bytes) *1 : Centralized control scheme Control scheme in which the transmitting station (computer) controls the operation of all receiving stations (inverters) by means of information transferred between the transmitting station and the receiving stations. All inverters connected to the network act as slaves that operate on a request from the computer. *2 : Changes to the communication baud rate and to the parity setting do not take effect until the inverter is turned back on or reset. *3 : In ASCII mode, every message is written in 8-bit alphabetic codes conforming to JIS-X-0201 (ANSI), and transmitted with a vertical parity bit specified by JIS-X-5001 (ANSI) added to it. The parity bit, which is set to odd parity by default, can be changed to odd parity or non-parity, from either the operation panel or the computer. *4 : Here are the default character transmission formats. Characters received by the inverter: 11 bits (1 start bit + 8 bits + 1 parity bit + 1 stop bit)... Standard default setting START BIT BIT0 BIT1 BIT2 BIT3 BIT4 BIT5 BIT6 BIT7 The inverter receives one stop bit. (The computer can be set so as to send 1, 1.5 or 2 stop bits.) PARITY BIT STOP BIT Characters sent from the inverter: 12 bits (1 start bit + 8 bits + 1 parity bit + 2 stop bits)... Standard default setting START BIT BIT0 BIT1 BIT2 BIT3 BIT4 BIT5 BIT6 BIT7 The inverter sends two stop bits. (The computer can be set so as to receive 1, 1.5 or 2 stop bits.) PARITY BIT STOP BIT STOP BIT 4
3. Exchange of data between the computer and the VF-S9 3.1. Brief explanation of the sequence When an inverter is linked with a computer or when an inverter acts as a slave in inverter-to-inverter communications, it remains in wait states and acts as a slave that operates on a request from the computer or the master inverter. In inverter-to-inverter communications, the master inverter only sends data to the slave inverter(s) but not receives any data from the slave inverter(s). A start code is used to automatically identify the mode in which data is transmitted: ASCII mode or binary mode. Inverter-to-inverter communications are carried out in binary mode. For the VF-S9 (hereinafter referred to as the inverter), the inverter-to-inverter communications function is provided only for inverters with CPU version V110 or later. ASCII mode (1) In ASCII mode, the start code is (. The inverter rejects all data items entered before the (. If two or more ( are entered, the ( entered last will be judged valid and all ( entered before will be ignored. If the ( is not recognized because of a format error or for any other reason, no error code will be returned since the data is not recognized at all. In such cases, the inverter regards the data received as a transmission error, rejects it and goes back into a start code wait state. (2) When an inverter number is added behind the (, communications will take place if the number matches up with that assigned to the inverter. If not, the inverter will go back into a start code wait state. (3) The inverter stops receiving data on receipt of the CR (carriage return) code inserted in the designated position. If the size of the data transmitted exceeds the maximum allowable size (17 bytes) or if the CR code cannot be found in the designated position within 1 second, the inverter will regard the data received as a transmission error and go back into a start code wait state. (4) If no communications take place within the time specified using the timer function, the computer will regard it as a communication error and trip the inverter. The timer setting is cleared when the timer is turned on or initialized. For details, see Section 8.1, Timer function. (5) On executing the command received, the inverter returns data to the computer. The VF-S9 series of inverters are designed to process communication data during idle time when they are not performing their main task: controlling the operation of a machine. Therefore, there is no guarantee for the response time. 5
Binary mode (1) In binary mode, the start code is 2FH(/). The inverter rejects all data items entered before the 2FH(/). If two or more 2FH(/) are entered, the 2FH(/) entered last will be judged valid and all 2FH(/) entered before will be ignored. If the 2FH(/) is not recognized because of a format error or for any other reason, no error code will be returned since the data is not recognized at all. (2) If an inverter number is added behind the 2FH(/), communication will be established only when the inverter number matches. If not, the inverter will reject the data received on receiving the specified number of characters (or one second after the receipt of the data if the inverter cannot receive the specified number of characters within one second), and then it will go back into a 2FH wait state. If the inverter number does not match, the inverter will go back into a start code wait state. (3) The inverter stops receiving data on receipt of a command and the number of bytes of data specified by the command. If the inverter cannot receive the specified number of bytes of data within the specified time (1 second), it will regard the data received as a transmission error, reject it and go back into a start code (2FH) wait state. (4) If no communications take place within the time specified using the timer function, the computer will assume that a communication error has occurred and trip the inverter. The timer function is disabled when the inverter is turned on or initialized. For details, see Section 8.1, Timer function. (5) On executing the command received, the inverter returns data to the computer. The VF-S9 series of inverters are designed to process communication data during idle time when they are not performing their main task: controlling the operation of a machine. Therefore, there is no guarantee for the response time. Note It takes about 1 second for the inverter to complete the initial setup process and to get ready for communications after it has been turned on. If control power supply is cut off because of a momentary power failure, communications will be interrupted. 6
3.2. Transmission errors Table of errors The table below lists errors that may occur during communications. Error name Description Error code Impossible to execute The command is impossible to execute, though communication 0000 was established normally. Writing data into a parameter whose setting cannot be changed during operation (e.g., maximum frequency) *1, writing data into a parameter while is in progress, specifying an internal command, and so on *2 Data error Invalid data is specified. 0001 Communication There is no communication number that matches. 0002 number error Command error The command specified does not exist. 0003 (ASCII mode) No code returned (Binary mode) Checksum error The sum differs. 0004 Format error The data transmission format does not match. No code returned A parity, overrun or framing error has occurred. *3 The CR code was not received within 1 second (ASCII mode), the specified number of bytes of data were not received within 1 second (binary mode), or the communication number is of 0 to 3 digits. For example, in the case of (R11) CR, 11) CR is recognized as a communication number and the data received is judged that it contains no CR code, with the result that a format error occurs. Inverter number error The inverter number is of one digit. The inverter number does not match. (If the inverter number does not match, no processing will be carried out and no data will be returned, though it is not regarded as an error.) No code returned *1 : For parameters whose settings cannot changed during operation, see 11.1, Table of parameters. *2 : If a command error occurs, no data will be returned. However, if an internal command (M) is used, it will cause an impossible-to-execute error and an error code will be returned. *3 : Parity error : The parity does not match. Overrun error : A new data item is entered while the data is being read. Framing error : The stop bit is placed in the wrong position. 7
4. Data transmission formats 4.1. Data transmission formats used in ASCII mode A communication number is used to specify a data item, all data is written in hexadecimal, and JIS- X-0201 (ASCII (ANSI))-compliant transmission characters are used. (1) Computer VF-S9 (ASCII mode) Omissible in one-to-one communications For the W and P commands only Omissible "(" (28H) INV-NO 2 bytes CMD 1 byte Communication No. 4 bytes DATA 0 to 4 bytes "&" (26H) SUM 2 bytes ")" (29H) CR (0DH) Checksum area Omissible 1. ( (1 byte) : Start code in ASCII mode 2. INV-NO (2 bytes) : Inverter number (Omissible in one-to-one communications)... 00 (30H, 30H) to 63 (36H, 33H). Note: In ASCII mode, an inverter number should be specified in decimal. The command is executed only when the inverter number in the data received matches up with that specified from the operation panel. If the inverter number does not match or if the inverter number is of one digit, the data will be judged invalid and no data will be returned. 3. CMD (1 byte) : Command (For details, see the table below.) 4. Communication number (4 bytes) : Communication number (See 11.1, Parameter data. ) 5. Data (0 to 4 bytes) : Write data (valid for the W and P commands only) 6. & (1 byte) : Checksum discrimination code (omissible) When omitting this code, you also need to omit the checksum. 7. Sum (2 bytes) : Checksum (omissible) ASCII-coded value of the last two digits (4 bits/digit) of the sum of a series of bits (ASCII codes) from the start code to the checksum discrimination code. Ex.: (R0000&??) 28H+52H+30H+30H+30H+30H+26H=160H The last two digits represent the checksum. = 60 When omitting the checksum, you also need to omit the checksum discrimination code. 8. ) (1 byte) : Stop code (omissible) 9. CR (1 byte) : Carriage return code Details of commands and data CMD (1 byte) Write data (0 to 4 bytes) Hexadecimal number R (52H): RAM read command W (57H): RAM/EEPROM write command P (50H) RAM write command No data Write data (0 to FFFF) Write data (0 to FFFF) 8
(2) VF-S9 computer (ASCII mode) 1) When data is processed normally Omissible Omissible "(" (28H) INV-NO 2 bytes CMD 1 byte Communication No. 4 bytes DATA 0 to 4 bytes "&" (26H) SUM 2 bytes ")" (29H) CR (0DH) Checksum area Omissible 1. ( (1 byte) : Start code in ASCII mode 2. INV-NO (2 bytes) : Inverter number 00 (30H, 30H) to 63 (36H, 33H) The command is executed only when the inverter number in the data received matches up with that specified from the operation panel. If the inverter number does not match or if the inverter number is of one digit, the data will be judged invalid and no data will be returned. (If the inverter number is omitted from the data received, it will not be returned.) 3. CMD (1 byte) : Command The command is also used for a check when an inverter is tripped. Under normal conditions...the uppercase letter R, W or P is returned, depending on the command received: R, W or P command. When an inverter is tripped...the lowercase letter r, w or p is returned, depending on the command received: R, W or P command. (The command received is returned with 20H added to it.) 4. Communication number : The communication number received is returned. 5. Data (4 bytes) : Data The data read in is returned for the R command, while the data received is returned for the W and P commands. If the data received is composed of less than 4 digits, it will be converted into 4-digit data and returned. Ex.: (W123412) (W12340012) 6. & (1 byte) : Checksum discrimination code (omitted if it is not found in the data received) 7. Sum (2 bytes) : Checksum ASCII-coded value of the last two digits (4 bits/digit) of the sum of a series of bits (ASCII codes) from the start code to the checksum discrimination code. (If the checksum discrimination code is omitted from the data received, it will not be returned.) 8. ) (1 byte) : Stop code (If the stop code is omitted from the data received, it will not be returned.) 9. CR (1 byte) : Carriage return code Note : If the reset command is issued, the return data may be cleared halfway through the transmission, depending on the timing. 9
2) When data is not processed normally (ASCII mode) If a communication error occurs, a communication error command (N or n) and an error identification number will be returned to the computer. If the checksum code is contained in the data received, it will be added to the data to be returned. If the inverter number does not match, however, no data will be returned to avoid a data crash. Omissible Omissible "(" (28H) INV-NO 2 bytes N or n Checksum area DATA 4 bytes "&" (26H) SUM 2 bytes ")" (29H) CR (0DH) Omissible N or n (1 byte) : Communication error command The command is also used for a check when an inverter is tripped. An N is returned under normal conditions, while an n is returned when the inverter is tripped. Data (4 bytes) : Error code (0000~0004) 0000... Impossible to execute (Although communication is established normally, the command cannot be executed because it is to write data into a parameter whose setting cannot be changed during operation (e.g., maximum frequency) or the EEPROM is faulty.) 0001... Data error (The data is outside the specified range or it is composed of too many digits.) 0002... Communication number error (There is no communication number that matches.) 0003... Command error (There is no command that matches.) 0004... Checksum error (The checksum result differs.) ) (1 byte) : Stop code This code is omitted if it is not found in the data received. Examples: (N0000&5C) CR... Impossible to execute (e.g., a change of maximum frequency data during operation) (N0001&5D) CR... Data error (Data is outside the specified range.) (N0002&5E) CR... No communication number (There is no communication number that matches.) (N0003&5F) CR... There is no command that matches. (Commands other than the R, W and P commands) (Ex.: L, S, a, b, m, r, w, t...) (N0004&60) CR... Checksum error (The checksum result differs.) No data returned... Even though there is no format error (e.g., data with no CR) and the inverter number matches, there may be cases where no data is returned, depending on the timing. 10
4.2. Data transmission formats used in binary mode A communication number is used to specify a data item, data is written in hexadecimal form, and data in transmission characters are represented by binary codes (HEX codes). (1) Computer VF-S9 (Binary mode) Omissible in one-to-one communications W, P and G *1 commands only / (2FH) INV-NO 1 byte CMD 1 byte Communication No. 2 bytes Checksum area DATA 2 bytes SUM 1 byte Not omissible Details of commands and data 1. 2FH ( / ) (1 byte) : Start code in binary mode 2. INV-NO (1 bytes) : Inverter number (Omissible in one-to-one communications) 00H to 3FH The command is executed only when the inverter number matches up with that specified from the operation panel. If the inverter number does not match, the data will be judged invalid and no data will be returned. 3. CMD (1 byte) : Command (For details, see the table below.) 52H (R) command : The size of the data following CMD is fixed to 3 bytes. (Communication number: 2 bytes, checksum: 1 byte) 57H (W), 50H (P) and 47H (G) *1 commands : The size of the data following CMD is fixed to 5 bytes. (Communication number: 2 bytes, data: 2 byte, checksum: 1 byte) Any command other than the above is rejected and no error code is returned. 4. Communication number (2 bytes) : Communication number (See 11, Parameter data. ) 5. Data (2 bytes) : Write data (valid for the 57H (W), 50H (P) and 47H (G) *1 commands only)... 0000H to FFFFH (Dummy data 0000H is required for the 47H (G) *1 command.) 6. Sum (2 bytes) : Checksum (not omissible) 00H to FFH Value of the last two digits (1 byte) of the sum of a series of bits (codes) from the start code of the data returned to the data (or to the communication number for the 52H (R) command) Ex.: 2F 52 00 00??... 2F+52+00+00=81 The last two digits (??) represent the checksum. = 81 CMD (1 byte) Write data (2 bytes) Hexadecimal number 52H (R): RAM read command No data 57H (W): RAM/EEPROM write command Write data (0000H to FFFFH) 50H (P): RAM write command Write data (0000H to FFFFH) 47H (G): RAM read command Dummy data (0000H) *1 : The 47H (G) command is available for inverters with CPU version V110 or later. 11
(2) VF-S9 computer (Binary mode) 1) When data is processed normally Omissible / (2FH) INV-NO 1 byte CMD 1 byte Communication No. 2 bytes DATA 2 bytes SUM 1 byte Checksum area Not omissible 1. 2FH ( / ) (1 byte) : Start code in binary mode 2. INV-NO (1 byte) : Inverter number 00H to 3FH The command is executed only when the inverter number in the data received matches up with that specified from the operation panel. If the inverter number does not match, the data will be judged invalid and no data will be returned. (If the inverter number is omitted from the data received, it will not be returned.) 3. CMD (1 byte) : Command The command is also used for a check when the inverter is tripped. Under normal conditions...52h (R), 57H (W), 50H (P) or 47H (G) *1 is returned, depending on the command received. When the inverter is tripped...the lowercase letter 72H (r), 77H (w), 70H (p) or 67H (g) *1 is returned with 20H added to it, depending on the command received. 4. Communication number (2 bytes) : The communication number received is returned. 5. Data (2 bytes) : Data 0000H to FFFFH The data read is returned for the 52H (R) and 47H (G) commands *1, while the data written is returned for the 57H (W) and 50H (P) commands. 6. Sum (1 byte) : Checksum (not omissible) 00H to FFH Value of the last two digits (1 byte) of the sum of a series of bits (codes) from the start code to the data. *1 : The 47H (G) command is available for inverters with CPU version V110 or later. Note : If the reset command is issued, the return data may be cleared halfway through the transmission, depending on the timing. 12
2) When data is not processed normally (Binary mode) If a communication error occurs, a communication error command (4EH (N) or 6EH (n)), an error identification number and the checksum will be returned to the computer. If the inverter number does not match, no data will be returned to avoid a data crash. Omissible (1 byte) (1 byte) / (2FH) INV-NO 1 byte N or n (4EH)(6EH) Checksum area DATA 2 bytes SUM 1 byte Not omissible N or n (1 byte) : Communication error command This command is also used for a check when the inverter is tripped. 4EH (N) is returned under normal conditions, while 6EH (n) is returned when the inverter is tripped. Data (2 bytes) : Error code (0000~0004) 0000...Impossible to execute (Although communication is established normally, the command cannot be executed because it is to write data into a parameter whose setting cannot be changed during operation (e.g., maximum frequency) or the EEPROM is faulty.) 0001...Data error (The data is outside the specified range or it is composed of too many digits.) 0002...Communication number error (There is no communication number that matches.) 0004...Checksum error (The checksum result differs.) No code returned...command error, format error (failure to receive the specified number of bytes within 1 second, or an parity, overrun or framing error) or the inverter number does not match. Examples: 2FH, 4EH, 00H, 00H, 7DH... Impossible to execute (e.g., a change of maximum frequency data during operation) 2FH, 4EH, 00H, 01H, 7EH... Data setting error (The data specified falls outside the specified range.) 2FH, 4EH, 00H, 02H, 7FH... No communication number (There is no communication number that matches.) 2FH, 4EH, 00H, 04H, 81H... Checksum error (The checksum result differs.) No data returned... If a format error occurs (failure to receive the specified number of bytes within 1 second), if the inverter number does not match, or if a command error occurs. 13
5. Data transmission commands Notice The EEPROM is good for 10,000 times of reprogramming. Do not write data into the same parameter stored in the EEPROM more than 10,000 times. Unless it is absolutely necessary to store data in the EEPROM, use the P command to write it into the RAM. 5.1. Commands available in ASCII mode 1) W (RAM *2 /EEPROM *3 write) This command is used to rewrite data into the parameter specified using a communication number. It writes data into the RAM and EEPROM. For parameters whose settings cannot be stored in the EEPROM (e.g., parameter with the communication No. FA00), the W command writes data into the RAM only. It cannot be used to write data into read-only parameters (e.g., parameter with the communication number FD?? or FE??). All data is returned as word data. When writing data, the command checks if the data is within the adjustment range specified for the parameter (see 11, Parameter data. ). If the data entered is outside the specified range, an error will occur and the data will be rejected. Ex. : Setting of the automatic acceleration/deceleration parameter Computer S9 S9 Computer : Communication No. 0000 = Automatic acceleration/deceleration (W00000) (W00000000) : Data 0 = Invalid 2) P (RAM *2 write) This command is used to rewrite data into the parameter specified using a communication number. It writes data into the RAM only. It cannot be used to write data into any read-only parameters. All data is returned as word data. When writing data, the command checks if the data is within the adjustment range specified for the parameter. If the data entered is outside the specified range, an error will occur and the data will be rejected. Ex. : Setting of the automatic acceleration/deceleration parameter Computer S9 S9 Computer : Communication No. 0000 = Automatic acceleration/deceleration (P00000) (P00000000) : Data 0 = Invalid 3) R (Data read) This command is used to read the setting of the parameter specified using a communication number. All data is returned as word data (4 digits). Ex: Setting of the automatic acceleration/deceleration parameter Computer S9 S9 Computer : Communication No. 0000 = Automatic acceleration/deceleration (R00000) (R00000000) : Data 0000 = Invalid 14
5.2. Commands available in binary mode 1) 57H ( W RAM *2 /EEPROM *3 write) This command is used to rewrite data into the parameter specified using a communication number. It writes data into the RAM and EEPROM. For parameters whose settings cannot be stored in the EEPROM (e.g., parameter with the communication No. FA00), the W (57H) command writes data into the RAM only. It cannot be used to write data into read-only parameters (e.g., parameter with the communication number FD?? or FE??). All data is returned as word data. When writing data, the command checks if the data is within the adjustment range specified for the parameter (see 11, Parameter data. ). If the data entered is outside the specified range, an error will occur and the data will be rejected. Ex. : Setting of the automatic acceleration/deceleration parameter Computer S9 S9 Computer: 2FH, 57H, 00H, 00H, 00H, 00H, 86H 2FH, 57H, 00H, 00H, 00H, 00H, 86H Communication No. (2 bytes) 00H, 00H ; Automatic acceleration/deceleration, Data (2 bytes) 00H, 00H; Invalid 2) 50H ( P RAM *2 write) This command is used to rewrite data into the parameter specified using a communication number. It writes data into the RAM only. It cannot be used to write data into any read-only parameters. All data is returned as word data. When writing data, the command checks if the data is within the adjustment range specified for the parameter. If the data entered is outside the specified range, an error will occur and the data will be rejected. Ex. : Setting of the automatic acceleration/deceleration parameter Computer S9 S9 Computer: 2FH, 50H, 00H, 00H, 00H, 00H, 7FH 2FH, 50H, 00H, 00H, 00H, 00H, 7FH Communication No. (2 bytes) 00H, 00H ; Automatic acceleration/deceleration, Data (2 bytes) 00H, 00H; Invalid 3) 52H ( R RAM *2 read) This command is used to read the setting of the parameter specified using a communication number. All data is returned as word data. Ex. : Reading of the automatic acceleration/deceleration parameter Computer S9 S9 Computer: 2FH, 52H, 00H, 00H, 81H 2FH, 52H, 00H, 00H, 00H, 00H, 81H Communication No. (2 bytes) 00H, 00H ; Automatic acceleration/deceleration, Data (2 bytes) 00H, 00H; Invalid 4) 47H ( G RAM *2 read) * This command is available for inverters with CPU version V110 or later. This command is used to read the parameter data specified using a communication number. All data is returned as word data. This command is different from the 52H (R) command in that the computer requires dummy data to issue this command. To control the operation of multiple inverters connected to a two-wire line via RS485 converters, and so on, the 47H (G) command is used instead of the 52H (R) command. In a two-wire network, the host computer receives the data returned from multiple inverters simultaneously, and therefore the 47H (G) command is more suitable than the 52H (R) command. This is because, in the case of the 52H (R) command, the number of bytes (number of codes) received is different from the number of bytes returned if the data received contains operation data, while, in the case of the 47H (G) command, the number of byes (number of codes) received is always the same as the number of bytes returned. Ex. : Reading of the acceleration parameter Computer S9 S9 Computer: 2FH, 47H, 00H, 09H, 00H, 00H, 7FH 2FH, 47H, 00H, 09H, 00H, 64H, E3H Communication No. (2 bytes) 00H, 09H; acceleration Data (2 bytes) 00H, 64H; 10.0 seconds Explanation of terms *2 : The RAM stores data used actually for operating the inverter. All data stored in it is cleared when the power is turned off, and parameter data stored in the EEPROM is copied to the RAM each time the inverter is turned on. 15
*3 : The EEPROM stores parameter settings and so on used for operating the inverter. Data stored in it is retained even after the power is turned off, and it is copied to the RAM each time the inverter is turned on or reset. 16
6. Communication parameters The communication baud rate, parity, inverter number, and communication error trip time can be changed from both the operation panel and the computer. Note that there are two types of parameters: parameters whose settings take effect immediately after the setting and parameters whose settings do not take effect until the inverter is turned back on or reset. (1) Communication baud rate (Communication No.: 800, Parameter name: ) 0 : 1200 bps, 1 : 1400 bps, 2 : 4800 bps 3 : 9600 bps, 4 : 19200 bps The same baud rate should be specified for the computer and every inverter on the network. The setting of this parameter does not take effect until the power is turned back on. If different baud rates are specified for the computer and an inverter, data received from one of them will be rejected by the other. (2) Parity (Communication No.: 801, Parameter name: ) 0 : Non parity, 1 : Even parity, 2 : Odd parity The same parity should be specified for the computer and every inverter on the network. The setting of this parameter does not take effect until the power is turned back on. If the parity does not match, the data received will be rejected. (3) Inverter number (Communication No.: 802, Parameter name: ) CPU version V101: Selectable from among 0 to 63 CPU version V110 or later: Selectable from among 0 to 255 (The inverter numbers you can select are between 0 and 99 in ASCII mode, and between 0 and 63 in binary mode. Numbers 100 to 255 are provided as bus options.) A different inverter number should be assigned to each inverter on the network. The setting of this parameter takes effect immediately. If the inverter number does not match, the data received will be rejected. (4) Communication error trip time (Communication No.: 803, Parameter name: ) 0 : No trip, Adjustable within a range of 0 to 100 (1 = Approx. 1.2 sec.) Communication error trip time can be set for each individual inverter on the network. The setting of this parameter takes effect immediately. If communication error trip time is set for an inverter, the computer will start to measure time when it first receives data from the inverter after the setting. If no data is sent from the inverter within the specified time, a communication error trip will occurs. (For details, see 8.1, Timer function. ) (5) Send wait time setting (for V110 and later) (Communication No.: 805, Parameter name: ) If send wait time is set for an inverter, the inverter will send data only after the send wait time or more has passed. 0 : Disabled, Adjustable within a range of 1 to 200 (1 = Approx. 10 ms) The setting of this parameter takes effect immediately. 17
(6) Inverter-to-inverter communication setting (For V110 and later) E6581139 (Communication No.: 806, Parameter name: ) 0 : Disabled (Slave) 1 : Master (Frequency instruction) 2 : Master (Output frequency) Only one inverter should be designated as the master. If two or more inverters on the same network are designated as masters, communications will not take place normally because of a data crash. To enable this parameter, the frequency setting mode parameter FMOd needs to be set to 3. The setting of this parameter does not take effect until the inverter is turned on or reset. 18
7. Commands and monitoring from the computer Across the network, instructions (commands and frequency instructions) can be sent to each inverter and the operating status of each inverter can be monitored. 7.1. Communication commands (commands from the computer) The VF-S9 series of inverters give priority to commands and frequency instructions entered from the computer across the network. For this reason, they have the mode of enabling commands and frequency instructions entered across the network, regardless of the setting of the command mode selection parameter ( ) enabling commands from the operation panel or terminal board, or the setting the frequency setting mode selection parameter ( ) enabling frequency instructions entered using the internal potentiometer, operation panel or terminal board. To enable communication commands (commands from the computer), set bit 15 of the communication No. FA00 parameter to 1 (enabled), and to enable frequency instructions from the computer, set bit 14 of the communication No. FA00 parameter to 1 (enabled). Once priority is given to commands and frequency instructions from the computer, they have priority until they are disabled manually (bit 15 of the communication No. FA00 parameter: 0), or until the inverter is turned off or reset, or until the inverter is reset to the standard default settings ( ). (1) Communication commands (commands from the computer) (Communication No. FA00: Communication command) Table 1 below shows the bit composition of the communication No. FA00 parameter. To enable commands from the computer, turn on bit 15 of the FA00. The setting of this parameter is valid regardless of the setting of the command mode selection parameter ( ). The setting of the FA00 cannot be stored in the EEPROM. To write data into the FA00, therefore, use the P command (RAM write command). Table 1 Data composition of communication commands (communication No.: FA00) Bit Specifications 0 1 15 Communication command enabled Disabled Enabled 14 Communication frequency instruction enabled Disabled Enabled 13 Reset OFF Reset 12 Emergency stop OFF Emergency stop 11 Coast stop OFF Coast stop 10 Run/stop Stop Run 9 Forward/reverse run Forward run Reverse run 8 Jog run OFF Jog run 7 DC braking OFF DC braking 6 Acceleration/deceleration pattern selection (1 or 2) Acceleration 1 Deceleration 2 5 PI control 4 3 2 1 0 Switching to No. 2 electronicthermal Preset-speed operation frequencies 4 Preset-speed operation frequencies 3 Preset-speed operation frequencies 2 Preset-speed operation frequencies 1 PI control permitted No. 1 electronicthermal OFF OFF OFF OFF PI control prohibited No. 2 electronicthermal ON ON ON ON 19
Ex.: Forward run command (PFA008400) Set bit 15 (communication command enabled) to bit 10 (operation command) to 1. BIT15 BIT8 BIT7 BIT0 FA00 : 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 Ex.: Reverse run (PFA008600), (PFA00C600) 8600H : To disable frequency instructions from the computer C600H : To enable also frequency instructions from the computer Ex.: Slowdown stop (PHA008000), (PFA00C0000) 8000H : To disable frequency instructions from the computer C000H : To enable also frequency instructions from the computer Note : If the reset command is executed, the reset program may start and abort the transmission of return data. (2) Frequency setting from the computer (Communication No. FA01: Communication frequency) To enable frequency instructions from the computer, turn on bit 14 of the FA00. The setting of bit 14 of the FA00 (enabling frequency instructions from the computer) is valid regardless of the setting of the frequency setting mode selection parameter ( ). To set operation frequencies from the computer, using the FA01, use hexadecimal numbers (unit: 1 = 0.01 Hz (unit)). The setting of the FA01 cannot be stored in the EEPROM. To write data into the FA01, therefore, use the P command (RAM write command). Ex.: Instruction for an operation frequency of 80 Hz (PFA011F40) 80 Hz = 80 / 0.01 = 8000 = 1F40H (3) TYP processing from the computer (Communication No. 0007: TYP) Like other operation parameters, this parameter can be set independently of the setting of the command mode selection parameter. Use the communication No. 0007 parameter to write data. VF-S9: 1 to 6 If you use the P command (RAM write command), the change you made to this parameter will not affect the setting of the parameter you made last from the operation panel, since the setting of the parameter that was made from the operation panel is read from the EEPROM into the RAM each time the inverter is turned on. To store the setting of this parameter in the EEPROM, therefore, you need to use the W command (RAM/EEPROM write command). Note : When processing is carried out, the reset program may start and abort the transmission of return data. Therefore, communications do not take place during initialization. 20
7.2. Monitoring from the computer (1) Status monitor The parameters with the communication Nos. FC90 and FE00 to FE14 allow you to monitor the operating status of the inverter. (See 11.1, Table of parameters. ) 1) Operation frequency monitor : Communication No. FE00 If a trip occurs, the frequency immediately before its occurrence will be retained. If you want to always monitor the current operation frequency without retaining the frequency immediately before the occurrence of a trip, use the communication No. FD00 parameter. 2) Inverter operating status : Communication No. FE01 (See Table 2 below.) If a trip occurs, the operating status immediately before its occurrence will be retained. 3) Past trip codes : Communication Nos. FE10 to FE13 (See 11.2, Table of trip codes. ) To monitor the current trip code, use the communication No. FC90 parameter. 4) Input terminal : Communication No. FE06 (See Table 3.) 5) Output terminal : Communication No. FE07 (See Table 4.) (2) Others For the settings of parameters, see 11.1, Table of parameters. ) Table 2 Data composition of inverter operating status (FE01) Bit Specifications 0 1 15 (Reserved) 14 (Reserved) 13 (Reserved) 12 Emergency stop Emergency stop 11 Coast stop Coast stop 10 Run/stop (See Note 1.) Stop Run 9 Forward/reverse run Forward run Reverse run 8 Jog run Jog run 7 DC braking DC braking 6 Acceleration/deceleration pattern selection (1 or 2) Acceleration/deceler ation 1 pattern Deceleration/decele ration 2 pattern 5 PI control PC control permitted PI control prohibited 4 Switching to No. 2 electronicthermal No. 1 electronicthermal No. 2 Electronicthermal 3 (Reserved) 2 (Reserved) 1 (Reserved) 0 (Reserved) Note 1 : DC braking at the end of operation is regarded as part of operation. 21
* Terminal board monitor A function can be selected for each terminal, using a parameter. Before monitoring the status of a terminal, check what function is assigned to it. Table 3 Data composition of input terminals (FE06) Bit Terminal name Parameter title Function Data when terminal is ON 0 F Input terminal 1 1H 1 R Input terminal 2 2H 2 RST Input terminal 3 4H 3 S1 Input terminal 4 8H 4 S2 Input terminal 5 10H 5 S3 Input terminal 6 20H Ex. : FE06 data when the S1 and F terminals are ON: 1H + 8H = 9H Table 4 Data composition of output terminals (FE07) Bit Terminal name Parameter title Function Data when terminal is ON 0 RY Output terminal 1 1H 1 OUT Output terminal 2 2H 2 FL Output terminal 3 4H Ex. : FE07 data when both the OUT1 and OUT2 terminals are ON: 1H + 2H = 3H 22
8. Functions 8.1. Timer function How to set the timer How to start the timer How to disable the timer Timer The communications function of the VF-S9 series of inverters includes a communication timer function that can be used to detect breaks in cables, and so on. The timer function is designed to trip an inverter if the inverter has not received any data within the time specified using this function. ( will be displayed.) The communication error trip time parameter ( ) is set to 0 (timer off) by default. Timer adjustment range About 1 sec. (01H) to about 100 sec. (64H) / Timer off (0H) If the timer is set from the operation panel, it will start automatically the instant when communication is established for the first time after the setting. If the timer is set from the computer, it will start automatically the instant when communication is established after the setting. If the timer setting is stored in the EEPROM, the timer will start when communication is established for the first time after the power has been turned on. Note that, if the inverter number does not match or if a format error occurs, preventing the inverter from returning data, the timer function will assume that no communication has taken place and will not start. To disable the timer, set its parameter to 0. Ex. : To disable the timer function from the computer (To store the timer setting in the EEPROM) Computer Inverter Inverter Computer (W08030) (W08030000)... (Sets the timer parameter to 0 to disable it.) Time-out period Computer link Inverter-to-inverter communications PC INV Master Slave INV INV INV PC PC INV Master Slave INV INV The timer measures the time elapsed before the inverter acknowledges receipt of data after it acknowledged receipt of the previous data. 23
8.2. Broadcast communications function The broadcast communications function enables the computer to issue a command simultaneously to (or to write data into) multiple inverters on the network. It supports the data write commands (W and P), but not the data read commands (R and G). As is the case with one-to-one communications, it supports up to 100 inverters bearing a number between 0 and 99 (00H to 63H) in ASCII mode, or up to 64 inverters bearing a number between 0 and 63 (00H and 3FH) in binary mode. For the return of data from inverters to the computer, the number of inverters that can return data is limited to avoid a data crash. (See the explanation below.) If the same inverter number is assigned to two different inverters on the same network, the data returned from one inverter will crash against the data returned from the other. To avoid this, never assign the same inverter number to different inverters connected to the same network. Host computer An example of system configuration (schematic diagram) Block 1 Block 2 Inverter No.10 Inverter No.11 Inverter No.19 Inverter No.20 Inverter No.21 Inverter No.29 VF-S9 VF-S9 VF-S9 VF-S9 VF-S9 VF-S9 *1 *1: Error signal I/F When sending data simultaneously to multiple inverters (broadcast communications), the host computer adds an asterisk (*) to the inverter number of each of them in ASCII mode. This asterisk serves as a wildcard that stands for any number between 0 and 9. The asterisk is replaced by 0 when data is received by each inverter, and the inverter whose number matches up with that number returns data to the computer on behalf of the other inverters. The other inverters do not return any data to the computer. Therefore, in order for the representative inverter to send a trip signal to the computer if a problem arises in the network, the failed inverter needs to provide the representative inverter with failure information using a terminal board signal. To check details of the problem, the host computer accesses each individual inverter, specifying its inverter number, when the system is out of operation. To make the computer issue a command to all inverters in block 1 or block 2 shown in the figure above, you need to specify 1* or 2*, respectively. In this system, inverter No. 10 in block 1 and inverter No. 20 in block 2 return data to the computer. Specifying ** enables broadcast communications. At that time, the inverter with the inverter number 00 returns data to the computer. The use of binary codes instead of ASCII codes reduces the number of characters to transmit, and thus further increases the data transfer rate. In that case, however, asterisks (*) cannot be used. In binary mode, overall broadcast communications can be carried out by specifying ff instead of the number of each destination inverter. In broadcast communications in binary mode, the inverter with the inverter number 00 returns data to the computer. * If you set a time-out period to enable the function of tripping an inverter upon the occurrence of an abnormal condition, the inverter will output a signal through an output terminal to report the occurrence of a problem to the representative inverter. 24
Overall broadcast communications (ASCII mode/binary mode) ASCII mode If you enter ** in the inverter number position of the data transmission format, broadcast communications will take place and the computer will issue a command to every eligible inverter* connected to the network. (*: Inverter with a number between 0 and 99 (00 to 63H)) Binary mode If you enter FF in the inverter number position of the data transmission format, broadcast communications will take place, and the computer will issue a command to every eligible inverter* connected to the network. (*: Inverter with a number between 0 and 63 (00 to 3FH)) <Inverter that returns data to the computer> Data is returned from the inverter bearing the inverter number 00 only. If you do not want inverters to return data, do not assign the number 00 to any inverter on the network. Group broadcast communications (ASCII mode only) If you put *? in the inverter number position of the data transmission format, data will be sent simultaneously to all inverters bearing a number whose digit in the ten s place in decimal notation is?. If you put?* in the inverter number position of the data transmission format, the data will be sent simultaneously to all inverters bearing a number whose digit in the one s place in decimal notation is?. (?: Any number between 0 and 9.) <Inverter that returns data to the computer> Data is returned only from the inverter bearing the smallest number in the same group of inverters (i.e., inverter whose number in the position of * is 0). If you do not want inverters to return data to the computer, do not assign a number having a 0 in the position of * to any inverter on the network.) Examples of broadcast communications Ex: Set the frequency setting for communication to 60Hz. Host computer Multiple inverters: broadcast communications ** (Broadcast communication symbol) + data to transmit Example of transmission of data from computer to inverter: (**W12341234) CR Example of data returned from inverter to computer: (00W12341234) CR Data is returned from the inverter numbered 00 only, while commands are issued to all inverters connected to the network. Host computer A specific group of inverters: group communications (ASCII Mode) * (Group number (inverter number)) + data to transmit Example of transmission of data from computer to inverters: (*9W12341234) CR Example of data returned from inverter to computer: (09W12341234) CR Data is returned only the inverter numbered 09 only, while commands are issued to a maximum of 10 inverters bearing the number 09, 19, 29, 39,... or 99. Host computer Multible inverters: broadcast communications (Binary mode) Example of transmission of data from computer to inverters: 2F FF 50 FA 01 17 70 00 Example of data returned from inverter to computer: 2F 00 50 FA 01 17 70 01 Data is returned only the inverter numbered 00. Commands are transmitted all enable inverters. 25