The ProSoft MVI56-MCM is a Modbus Master/Slave communication module for the Rockwell Automation ControlLogix platform. It acts as a gateway between the ControlLogix backplane and Modbus-compatible devices, enabling seamless data exchange with instruments, drives, and SCADA systems.
Item No :
MVI56-MCMOrder(MOQ) :
1 PiecePayment :
EXWProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
0.5KGPart Number: MVI56-MCM
Product Type: Modbus Communication Module (Master/Slave)
Platform: Rockwell Automation ControlLogix (1756 backplane), single-slot
Communication Ports: 2 application ports + 1 configuration port (RJ45 connectors, supports RS-232/RS-422/RS-485)
Protocol Support: Modbus RTU and Modbus ASCII
Modbus Functions: Master – commands 1, 2, 3, 4, 5, 6, 15, 16, 22, 23; Slave – commands 1, 2, 3, 4, 5, 6, 15, 16, 17, 22
Data Memory: 5000-word register space for processor-to-network data exchange
Backplane Current: 800 mA @ 5.1 Vdc
Operating Temperature: 0 to 60°C (32 to 140°F)
Configuration: Via RSLogix 5000 with sample ladder logic provided; Add-On Instructions available for version 16 and above
| Category | Model | Key Features |
|---|---|---|
| Enhanced Replacement | MVI56E-MCM | Enhanced version with direct backward compatibility and larger 10,000-word database; drops-in replacement for MVI56-MCM |
| CompactLogix Alternative | ILX56-MM | InRail series upgrade for CompactLogix platforms; modern hardware architecture; recommended as MVI56-MCM successor for CompactLogix systems |
| Third-Party Gateway | EG-EIP2MB | Ethernet/IP to Modbus gateway; connects via Ethernet, no programming required; alternative to in-chassis modules |
Q1: What Modbus protocols does the MVI56-MCM support?
It supports both Modbus RTU (binary with CRC-16) and Modbus ASCII (with LRC error checking) protocols. Each port can be independently configured for either protocol .
Q2: Can the two ports operate as Master and Slave simultaneously?
Yes. Each of the two application ports can be independently configured as a Modbus master, a Modbus slave, or any combination thereof .
Q3: What is the difference between MVI56-MCM and MVI56-MCMR?
The MVI56-MCM is the general-purpose Modbus serial solution for ControlLogix and is the preferred choice for local or remote chassis installations. The MVI56-MCMR is a variant with different specifications .
Q4: Can the MVI56E-MCM directly replace the MVI56-MCM?
Yes. The MVI56E-MCM is designed as an enhanced, backward-compatible replacement. It offers a larger database capacity (10,000 words vs. 5,000) and can be swapped in without controller program changes .
Q5: What is the data exchange capacity between the module and the processor?
The module provides a 5000-word register space for data exchange between the ControlLogix processor and the Modbus network. Data transfer is asynchronous from network activity.
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