ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 127)

MVI56E-MCM ♦ ControlLogix Platform Reference
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 127 of 199
June 18, 2014
Module Configuration Block (9000)
On boot-up, the module sends a request for configuration information to the
processor. The request block has a Block ID of 9000.
Block Request from Module to Processor
Word Offset Description Length
0 Reserved 1
1 9000 1
2 to 248 Spare 247
249 9000 1
The processor responds by sending a block with general configuration
information to the module.
Configuration Block from Processor to Module
Word Offset Description Length
0 9000 1
1 to 6 Backplane Setup 6
7 to 31 Port 1 Configuration 25
32 to 56 Port 2 Configuration 25
57 to 59 Port 1 Aux. Configuration 3
60 to 62 Port 2 Aux. Configuration 3
63 to 247 Spare 185
If the configuration information is valid, the module commences normal data
transfer operation. If there are errors in the configuration, the module sends the
processor a read block with configuration error codes.
Block Response from Module to Processor
Word Offset Description Length
0 Reserved 1
1 9000 1
2 Module Configuration Error Code 1
3 Port 1 Configuration Error Code 1
4 Port 2 Configuration Error Code 1
5 to 248 Spare 244
249 -2 or -3 1
Any errors must be corrected before the module will start operating.