Modbus Protocol Specification; Commands Supported By The Module - ProSoft Technology ControlLogix inRAx MVI56E-MNETR User Manual

Reference
User Manual
5.5

Modbus Protocol Specification

The following pages give additional reference information regarding the Modbus
protocol commands supported by the MVI56E-MNETR.

5.5.1 Commands Supported by the Module

The format of each command in the list depends on the Modbus Function Code
being executed.
The following table lists the functions supported by the module.
Function Code
1
2
3
4
5
6
7
8
15
16
22
23
Each command list record has the same general format. The first part of the
record contains the information relating to the communication module and the
second part contains information required to interface to the Modbus TCP/IP
server device.
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Definition
Read Coil Status
Read Input Status
Read Holding Registers
Read Input Registers
Set Single Coil
Single Register Write
Read Exception Status
Diagnostics
Multiple Coil Write
Multiple Register Write
Mask Write 4X
Read/Write
MVI56E-MNETR ♦ ControlLogix Platform
Modbus TCP/IP Interface Module with Reduced Data Block
Supported in Client
X
X
X
X
X
X
X
X
Supported in Server
X
X
X
X
X
X
X
X
X
X
X
X
ProSoft Technology, Inc.
June 14, 2011