The PROSOFT MVI56E-MCM (Part Number: MVI56E-MCM) is a high-performance communication module designed to bridge Rockwell Automation’s ControlLogix 5000 series PLCs with Modbus RTU/ASCII devices in industrial automation systems It enables seamless integration of Modbus-compatible instruments, sensors, and PLCs into ControlLogix-based control systems, supporting both Master and Slave communication modes.
This module features dual RS232/RS485/RS422 serial ports with configurable baud rates (110 bps to 115.2 kbps) and advanced protocol handling, making it suitable for diverse applications in manufacturing, energy, and process industries. Unlike standard Modbus gateways, the MVI56E-MCM acts as an I/O module on the ControlLogix backplane, allowing direct data exchange with the PLC’s ladder logic without additional middleware.
Key innovations include CIP Connect® integration, which enables remote configuration and diagnostics via Rockwell’s 1756-ENBT Ethernet module, and reduced data block support for optimized bandwidth usage in remote rack applications16. The module also supports hot swapping (RIUP) and includes a 4-character alphanumeric LED display for real-time status monitoring
Communication Capabilities:
- Dual Serial Ports: Two independent ports (P1/P2) support Modbus RTU/ASCII, with configurable electrical standard (RS232/RS485/RS422) and baud rates up to 115.2 kbps
- Protocol Flexibility: Handles Modbus function codes , including Enron/Daniel floating-point data formats for process control.
- Master/Slave Modes: Each port can operate as a Modbus Master (polling up to 325 commands per port) or Slave (responding to external Master requests).
Integration & Compatibility:
- ControlLogix Native: Occupies a single slot in ControlLogix racks (1756 backplane) and appears as an I/O module in RSLogix 5000 projects.
- CIP Connect®: Remotely access module settings via Rockwell’s Ethernet/IP network, eliminating the need for direct physical access.
- Backward Compatibility: Replaces legacy MVI56 modules without reconfiguring existing PLC programs
Diagnostics & Reliability:
- LED Indicators: Real-time status display for power, communication errors, and port activity.
- Error Logging: Stores network error counters and command-specific diagnostics in user memory for troubleshooting.
- Conformal Coating (Optional): Protects against harsh environments (MVI56E-MCM XT variant).
| Parameter | Description |
|---|
| Protocol Support | Modbus RTU/ASCII (Master/Slave), Enron/Daniel floating-point |
| Serial Ports | 2 × RS232/RS485/RS422 (configurable via jumpers) |
| Baud Rate | 110 bps to 115.2 kbps |
| Data Memory | Up to 10,000 16-bit registers for Modbus data mapping |
| Backplane Power | 800 mA @ 5 VDC, 3 mA @ 24 VDC |
| Operating Temperature | 0°C to 60°C (standard); -25°C to 70°C (MVI56E-MCM XT variant) |
| Physical Dimensions | 175 mm × 89 mm × 32 mm (W × H × D) |
| Certifications | CE, UL 508 (pending), IEC 61000-6-2 (EMC compliance) |
Process Industries:
- Chemical Plants: Connect Modbus-based flow meters and pH analyzers to ControlLogix PLCs for real-time process monitoring
- Oil & Gas: Integrate Modbus RTU pumps and valves into distributed control systems (DCS) for SCADA integration
Manufacturing:
- Packaging Lines: Interface with Modbus-compatible robotic arms and vision systems for synchronized production control.
- Water Treatment: Link Modbus sensors (level transmitters, chlorinators) to ControlLogix for automated water quality management.
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