ProSoft MVI56E-MCM/MCMXT Modbus Master/Slave Communication Module

I. Product Overview

The MVI56E-MCM/MCMXT is a high-performance Modbus serial communication module specially designed by ProSoft Technology for the Rockwell ControlLogix platform. Its core function is to provide two independent and fully configurable Modbus serial interfaces for the ControlLogix controller, supporting Modbus RTU/ASCII protocols, and each port can be set as either a master or slave mode independently. ProSoft Technology Inc. This module is the preferred industrial-grade interface solution for achieving interconnection between ControlLogix systems and various standard Modbus instruments, sensors, drives, PLCs, etc. MCM is the standard industrial version, and MCMXT is the wide-temperature enhanced version, suitable for extreme harsh environments. ProSoft Technology Inc.

II. Model Code Interpretation

MVI56E: Enhanced inRAx Series, ControlLogix 1756 Single Slot Enhanced Module

MCM: Modbus Master/Slave Communications, Modbus Master/Slave Communication

XT: Extreme Environment, Wide Temperature/Enhanced Version

III. Core Technical Parameters

(1) Hardware Specifications

Compatible Platforms: Rockwell ControlLogix 1756 Rack (Local/Remote Rack) ProSoft Technology Inc.

Slot Occupancy: Single Slot (1756 Standard Size) ProSoft Technology Inc.

Backplane Power Consumption: 800mA @ 5VDC; 3mA @ 24VDC

Ethernet configuration port:

1 10/100 Mbps adaptive Ethernet port (RJ45)

Supports Auto-MDIX, ProSoft Discovery Service (PDS)

Supports CIPconnect remote diagnosis, configuration, firmware upgrade

Built-in Web server (status monitoring, configuration)

Modbus serial port:

2 2 independent, optically isolated serial ports (RS-232/422/485, software configurable) ProSoft Technology Inc

Baud rate: 110 ~ 115.2 kbps

Data bits: 5/6/7/8; Stop bits: 1/2; Checksum: None/Even/Odd

Signal isolation: 2500Vrms optical isolation

Interface type: RJ45

Data buffer: 10,000 bytes (16 bits) shared user database ProSoft Technology Inc

Status indicator:

3-color LED status lights (OK, APP, ERR)

4-character scrolling alphanumeric LED display (display IP, port status, error code)

Environmental indicators:

Operating temperature: 0°C ~ +60°C (MCM); -25°C ~ +70°C (MCMXT)

Storage temperature: -40°C ~ +85°C

Vibration: 5g @ 10~150Hz; Shock: 30g (running) / 50g (non-running)

Humidity: 5% ~ 95% (no condensation)

Special protection (MCMXT): Full panel coating, corrosion-resistant, dust-proof, moisture-proof ProSoft Technology Inc

Certifications: CE, UL, cURus, RoHS, ATEX (MCMXT) ProSoft Technology Inc

(II) Communication and Protocol Parameters

Supported protocols: Modbus RTU, Modbus ASCII ProSoft Technology Inc

Working mode: Each port can be independently configured as a master (Master) or a slave (Slave) ProSoft Technology Inc

Master function:

Each port supports up to 325 command queues

Supports periodic polling, event triggering, command priority mechanism

Supports failed commands automatic retry, data verification (CRC/LRC)

Slave function:

Supports standard Modbus function codes 01, 02, 03, 04, 05, 06, 08, 15, 16

Node address: 1 ~ 247 configurable

Data mapping: Modbus data ↔ ControlLogix controller tag automatic bidirectional mapping

(III) Software and Configuration

Configuration software: ProSoft Configuration Builder (PCB), ProSoft Discovery Service (PDS)

Programming integration: Add-On Instruction (AOI), complete ladder diagram examples

Programming software: RSLogix 5000 / Studio 5000 (V10+)

Compatibility: Fully backward compatible with old MVI56-MCM modules, direct replacement without program modification

Four, Product Core Characteristics

Dual-port independent flexible configuration

Two paths completely isolated, software switchable RS-232/422/485 serial interfaces. Single-module can simultaneously operate as dual master stations, dual slave stations, or one master and one slave, connecting two independent Modbus networks, maximizing communication efficiency and network topology flexibility. ProSoft Technology Inc.

Powerful master station polling engine

Up to 325 commands per port, supporting event triggering and periodic polling, precisely controlling the data acquisition timing. 10,000-byte ultra-large data buffer, meeting the data throughput requirements of large-scale Modbus networks.

Enhanced Ethernet and remote management

Special 10/100Mbps Ethernet configuration port + built-in Web server + CIPconnect technology, enabling cross-network, remote, online diagnosis, configuration, and firmware upgrade without on-site presence, significantly reducing operation and maintenance costs.

Industrial-grade stability and isolation protection

2500V photoelectric isolation completely blocks ground potential difference and surge impact, protecting PLC and valuable equipment. No fan, wide temperature, high vibration resistance design, MCMXT version **-25°C~+70°C wide temperature and anti-corrosion coating **, specially designed for harsh working conditions such as metallurgy, mining, oil and gas, and offshore platforms. ProSoft Technology Inc.

Seamless integration and plug-and-play

Standard 1756 single-slot, hot-swappable design. Provides pre-prepared AOI instructions and ladder diagram templates, Modbus data automatically mapped to PLC tags, deployment completed within 30 minutes, no complex programming required.

Comprehensive diagnosis and status monitoring

4-character LED display screen + LED status lights + PCB software diagnosis + Web interface, providing full-dimensional real-time monitoring of modules, ports, commands, and errors, quickly locating communication faults.

V. Typical Application Scenarios

Manufacturing: Connecting frequency converters, servo drives, HMI, sensors, barcode devices, etc. Modbus devices ProSoft Technology Inc.

Process control: Flow meters, pressure gauges, temperature controllers, analyzers, PLC, etc. instrument data acquisition ProSoft Technology Inc.

Power / Energy: Relay protection devices, RTU, SCADA system communication

Oil and gas / Chemical: Remote terminals, valve control, tank monitoring (recommended MCMXT)

Water treatment: Pumps, water quality analyzers, dosing system control ProSoft Technology Inc.

Upgrade of old systems: Non-Rockwell PLC (such as Modbus slave stations) ↔ ControlLogix system integration ProSoft Technology Inc.

VI. Version Comparison (MCM vs MCMXT) Table

Parameters: MVI56E-MCM (Standard Version) MVI56E-MCMXT (Enhanced Version)

Operating Temperature: 0°C ~ +60°C -25°C ~ +70°C

Environmental Protection: Standard industrial grade Full board coating, anti-corrosion, dust-proof, moisture-proof ProSoft Technology Inc.

Certifications: CE, UL, cURus, RoHS Includes ATEX hazardous area certification ProSoft Technology Inc.

Application Scenarios: General industrial control cabinets Extreme temperature, high humidity, dust, chemical corrosion environment ProSoft Technology Inc.

VII. Product Advantage Summary

MVI56E-MCM/MCMXT is the most mainstream, stable, and fully functional dual-port Modbus master/slave communication module on the ControlLogix platform. Its core value lies in the independent dual network ports, large command queue, full isolation protection, remote Web management, and extreme environment adaptation. It perfectly solves the seamless connection problem between Rockwell controllers and a large number of Modbus devices, and is an industrial standard solution for Modbus network integration in industrial automation, process control, and energy management fields.