ProSoft Technology MVI56E-MNETC User Manual

Reference MVI56E-MNETC/MNETCXT ♦ ControlLogix Platform
User Manual Modbus TCP/IP Client Enhanced Communication Module - Client/Server
Page 124 of 172 ProSoft Technology, Inc.
September 20, 2018
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
Modbus Function
9956
6, 16 (word type data)
9957
6, 16 (floating-point)
9958
5
9959
15
9960
22
9961
23
9970
99
Pass-Through Blocks 9956, 9957, 9958, 9960 or 9961 from Module to Processor
Word Offset
Description
Length
0
0
1
1
9956, 9957, 9958, 9960 or 9961
1
2
Number of word registers in Modbus data set
1
3
Starting address for Modbus data set
1
4 to 248
Modbus data set
245
249
9956, 9957, 9958, 9960 or 9961
1

ProSoft Technology MVI56E-MNETC Specifications

General

Brand	ProSoft Technology
Model	MVI56E-MNETC
Category	Server
Language	English