ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 160)

Reference MVI56E-MCM ♦ ControlLogix Platform
User Manual Modbus Communication Module
Page 160 of 199 ProSoft Technology, Inc.
June 18, 2014
Tag Name Data Type Description
P2Slaves INT[256] P2 Slave Status
Passthru
Tag Name Data Type Description
MBOffset INT
MBOffsetBit INT
MBMsgLen INT
MBMsg SINT[500]
MBControl1 MCMCONTROL
(page 158)
MBControl2 MCMCONTROL
(page 158)
MBScratch INT[3]
MBCoil CoilArray (page
160) Conversion from Bool to INT data types
CoilArray
Conversion to INT values
Name Data Type Description
Boolean BOOL[416] Conversion from Bool to INT data types
6.8 Modbus Protocol Specification
The following pages give additional reference information regarding the Modbus
protocol commands supported by the MVI56E-MCM.
6.8.1 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 Definition Supported in
Master Supported in
Slave
1 Read Coil Status X X
2 Read Input Status X X
3 Read Holding Registers X X
4 Read Input Registers X X
5 Set Single Coil X X
6 Single Register Write X X
8 Diagnostics X
15 Multiple Coil Write X X
16 Multiple Register Write X X
17 Report Slave ID X