GE 469

469 MOTOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE TOC-2
Table of Contents
MODBUS PROTOCOL Electrical Interface...........................................................................................................................................1
Modbus RTU Protocol .....................................................................................................................................1
Data Frame Format and Data Rate.........................................................................................................2
Data Packet Format........................................................................................................................................2
CRC-16 Algorithm.............................................................................................................................................3
Timing ....................................................................................................................................................................4
MODBUS FUNCTIONS Supported Functions ......................................................................................................................................5
Read Relay Coil / Digital Input Status .....................................................................................................5
Read Setpoints and Actual Values ...........................................................................................................7
Execute Operation ...........................................................................................................................................8
Store Single Setpoint.......................................................................................................................................8
Read Device Status..........................................................................................................................................9
Loopback Test................................................................................................................................................. 10
Store Multiple Setpoints..............................................................................................................................10
Performing Commands ..............................................................................................................................11
Error Responses .............................................................................................................................................12
MODBUS MEMORY
MAP
Memory Map Information.........................................................................................................................13
User-Definable Memory Map Area ....................................................................................................... 13
Event Recorder ...............................................................................................................................................15
Waveform Capture....................................................................................................................................... 15
469 Memory Map..........................................................................................................................................19
Format Codes............................................................................................................................................... 109
DEVICENET
PROTOCOL
Overview......................................................................................................................................................... 124
Poll Data.......................................................................................................................................................... 124
Change of State (COS) .............................................................................................................................. 124
DeviceNet Objects...................................................................................................................................... 125
469 Specific Objects.................................................................................................................................. 131
DeviceNet Data Formats ........................................................................................................................ 140