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
