GPD315/V7 Modbus RTU Technical Manual TM 4325
Page
iii
Contents
Technical References ....................................................................................................................ii
Technical Support Center: .............................................................................................................ii
Field Service/Support: ...................................................................................................................ii
Chapter 1...................................................................................................................................... 1
GPD315 and Serial Communication ............................................................................................. 1
Introduction................................................................................................................................... 1
GPD315 Modbus RTU Specifications ........................................................................................... 1
Chapter 2...................................................................................................................................... 2
GPD315 Modbus RTU Connections ............................................................................................. 2
Wiring...........................................................................................................................................2
Connecting Multiple Drives ........................................................................................................... 4
Chapter 3...................................................................................................................................... 5
GPD315 Communication Parameters...........................................................................................5
Run/Stop and Frequency Selection...............................................................................................5
Serial Communication Set up Parameters....................................................................................6
WARNING....................................................................................................................................8
Chapter 4...................................................................................................................................... 9
Modbus RTU Message Format.....................................................................................................9
Message Functions.......................................................................................................................9
Read Multiple Registers – Function 03h .....................................................................................10
Loop-back Test - 08h.................................................................................................................. 12
Write Multiple Registers - 10h..................................................................................................... 14
No Response Message...............................................................................................................17
CRC-16 ......................................................................................................................................17
Chapter 5.................................................................................................................................... 20
Parameter Tables........................................................................................................................20
Simultaneous Broadcast Registers (Write Only).........................................................................20
Command Registers (Read/Write).............................................................................................. 20
Monitor Registers (Read Only) ...................................................................................................21
Drive Parameter Registers (Read/Write) ....................................................................................23
Notes:......................................................................................................................................... 33
Error Codes and Troubleshooting...............................................................................................34
Communication Error..................................................................................................................34
Modbus Error Codes................................................................................................................... 34
Chapter 7.................................................................................................................................... 35
Command Priority.......................................................................................................................35
Command Priority.......................................................................................................................35
Set up for Serial Communication Control.................................................................................... 36
Set up for External Terminals Control .........................................................................................37
Set up for Digital Operator Control.............................................................................................. 38
Appendix A ................................................................................................................................. 39
Product Specifications ................................................................................................................ 39
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