ProSoft Technology MVI69L-MBS - Manual (Page 136)

Reference MVI69L-MBS ♦ CompactLogix Platform
User Manual Communication Module
Page 136 of 154 ProSoft Technology, Inc.
January 6, 2014
7.4.14 Pass-through Formatted Block for Functions 6 and 16 with
Float Data Block
Block 9957: Pass-through Formatted Block for Functions 6 and 16 with Float
Data Block
Block 9957: Request from Module to Processor
Offset Description
0 Read Block ID: 9957
1 Write Block ID: 9957
2 Number of word registers in Modbus data set
3 Starting address for Modbus data set
4 to 239 Data
The ladder logic is responsible for parsing and copying the received message
and performing the proper control operation as expected by the Master device.
The processor must then respond to the Pass-through block with a write block
with the following format.
Block 9957: Response from Processor to Module
Offset Description
0 Write Block ID: 9957
1 to 239 Spare
This informs the module that the command has been processed and can be
cleared from the pass-through queue.