ProSoft Technology MVI56E-MNETC User Manual page 124

Reference
User Manual
The Modbus protocol supports control of binary output (coils - functions 5 and 15)
and registers (functions 6 and 16).
Any Modbus function 5, 6, 15 or 16 commands will be passed from the server to
the processor using the block identification numbers 9956 to 9961, 9970 and
9996.
Formatted Pass-Through Blocks (9956 to 9961, 9970)
In formatted pass-through mode, the module processes the received write
request and generates a special block dependent on the function received. There
are two modes of operation when the formatted pass-through mode is selected. If
code 2 is utilized (no swap), the data received in the message is presented in the
order expected by the processor. If code 3 is utilized (swap mode), the bytes in
the data area of the message will be swapped. This selection is applied to all
received write requests. The block identification code used with the request
depends on the Modbus function requested.
Block ID
9956
9957
9958
9959
9960
9961
9970
Pass-Through Blocks 9956, 9957, 9958, 9960 or 9961 from Module to Processor
Word Offset
0
1
2
3
4 to 248
249
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Modbus TCP/IP Client Enhanced Communication Module - Client/Server
Modbus Function
6, 16 (word type data)
6, 16 (floating-point)
5
15
22
23
99
Description
0
9956, 9957, 9958, 9960 or 9961
Number of word registers in Modbus data set
Starting address for Modbus data set
Modbus data set
9956, 9957, 9958, 9960 or 9961
MVI56E-MNETC/MNETCXT ♦ ControlLogix Platform
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ProSoft Technology, Inc.
September 20, 2018