ProSoft Technology MVI69E-MBS - Manual (Page 146)

Reference MVI69E-MBS ♦ CompactLogix Platform
User Manual Communication Module
Page 146 of 162 ProSoft Technology, Inc.
January 6, 2014
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 control block with an
output image write block with the following format.
Block 9960: Response from Processor to Module
Offset Description
0 Write Block ID: 9960
1 to n Spare (Length in words = n - 2)
This informs the module that the command has been processed and can be
cleared from the pass-through queue.
7.4.18 Pass-through Formatted Block for Function 23
Block 9961: Pass-through Formatted Block for Function 23
Block 9961: Request from Module to Processor
Offset Description
0 Read Block ID: 9961
1 Write Block ID: 9961
2 Number of word registers in Modbus data set
3 Starting address for Modbus data set
4 to (n+1) Data (Length in words = n - 2)
Where n = 60, 120, or 240 depending on the Block Transfer Size parameter.
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 control block with an
output image write block with the following format.
Block 9961: Response from Processor to Module
Offset Description
0 Write Block ID: 9961
1 to n Spare (Length in words = n - 2)
This informs the module that the command has been processed and can be
cleared from the pass-through queue.