ProSoft MVI56‑MCM Modbus Master/Slave Communication Module

ProSoft MVI56‑MCM is a dedicated Modbus master/slave communication module for Allen‑Bradley ControlLogix platform. It connects ControlLogix PLC with Modbus‑RTU/ASCII field instruments, meters and drives, completes protocol conversion and high‑speed data transmission via ControlLogix backplane without external gateway device.

This single‑slot rack‑mount module has two independent serial ports supporting RS232/422/485 interface, supports master and slave mode configuration. It is widely used as replacement spare‑part for on‑site troubleshooting, equipment maintenance and automation system retrofit projects.

Main Specifications

• Brand: ProSoft Technology
• Model: MVI56‑MCM
• Product Type: Modbus Master/Slave Communication Module
• Platform: Allen‑Bradley ControlLogix 1756 chassis backplane
• Serial Ports: Dual independent configurable ports, RS‑232/422/485
• Supported Protocol: Modbus RTU, Modbus ASCII, support floating‑point data format
• Baud Rate: 110‑115200 baud adjustable
• Function Mode: Configurable as Modbus Master or Slave
• Mounting: Standard ControlLogix rack‑mount single‑slot installation
• Operating Temperature Range: 0℃ ~ +60℃
• Application: Spare‑part replacement for industrial automation equipment

Core Functions

• Realize protocol conversion between ControlLogix backplane and Modbus serial field‑bus devices
• Dual independent serial ports can be separately configured as master or slave working mode
• Poll Modbus field instruments, transmit collected data to ControlLogix controller via backplane
• Act as Modbus slave to upload PLC internal data to third‑party SCADA and host system
• Process Modbus CRC‑16/LRC check, data parsing and floating‑point data conversion work
• Built‑in LED diagnostic indicators for quick judgement of communication and module status
• Comes with sample ladder logic for convenient configuration and integration into RSLogix5000 project
• Reduce PLC scan‑cycle load, undertake Modbus protocol processing independently of main CPU
• Standard single‑slot rack‑mount structure supports quick disassembly and on‑site spare‑part replacement

Application Scenarios

• ControlLogix PLC cabinet Modbus serial device access configuration projects
• Power industry power meter, protection instrument data‑acquisition supporting projects
• Petrochemical factory Modbus RTU instruments connecting and data‑collection scenarios
• On‑site communication module fault replacement and daily ControlLogix system maintenance work
• Automation system renovation for connecting legacy Modbus‑based field equipment
• Legacy ProSoft MVI56 series communication module spare‑parts replacement scenarios
• Spare‑parts inventory backup for factory production‑line PLC control cabinets
• Industrial cabinet serial communication hardware maintenance and supporting engineering projects