Yaskawa G7 Modbus Communication - Manual (Page 5)

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Table of Contents
Chapter 1 - Connections....................................................................7
Connection Check Sheet ................................................................................................ 8
Verify Operation.............................................................................................................. 9
G7 Drive Connections....................................................................................................10
Network Connections.....................................................................................................11
Communications Parameters.........................................................................................13
Run/Stop and Frequency Reference Source..................................................................15
Verify Communication....................................................................................................16
Chapter 2 - Message Formats .........................................................18
Protocol .........................................................................................................................20
Read Multiple Registers – Function Code 03H ..............................................................21
Write Single Register – Function Code 06H...................................................................23
Loop-Back Test – Function Code 08H ...........................................................................25
Write Multiple Registers – Function Code 10H...............................................................27
No Response.................................................................................................................29
Error Codes ...................................................................................................................29
CRC-16 Calculations .....................................................................................................30
Chapter 3 - Troubleshooting ...........................................................31
General Information .......................................................................................................33
RS-232 Communication.................................................................................................35
RS-422/RS-485 Communication....................................................................................37
RS-422/RS-485 Self-Test ..............................................................................................40
Chapter 4 - G7 Drive Parameters....................................................41
Command Registers (Read/Write) for Modbus RTU ......................................................42
Broadcast Registers (Write Only)...................................................................................43
Monitor Registers (Read Only).......................................................................................44
Parameter Registers (Read/Write) .................................................................................52
CM090 Modbus TCP/IP Option Kit Specific Registers ...................................................75
ENTER/ACCEPT Command (Write Only) ......................................................................78
Modbus Fault Decoding Table for Monitors....................................................................79
Chapter 5 - User Notes ....................................................................81
Notes .............................................................................................................................82
User Parameter Settings................................................................................................83
Hex/Dec Conversion Table ............................................................................................91