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Product Overview
The ProSoft MVI56E-MNETC is an enhanced Modbus TCP/IP communication module designed for Rockwell Automation ControlLogix systems. It allows a ControlLogix processor to communicate with multiple Modbus TCP/IP devices, including Modicon controllers, instrumentation, drives, and third-party equipment. The module supports up to 30 Modbus TCP client connections and up to 40 server connections, allowing client and server functions to operate simultaneously. It uses a single-slot 1756 backplane connection and provides a 10/100 Mbps Ethernet interface through an RJ45 port. ProSoft also provides configuration and diagnostic access through the module Ethernet port, while supplied Add-On Instructions or ladder logic integrate data exchange with RSLogix 5000/Studio 5000 applications. This architecture makes the unit particularly useful as a protocol bridge and data-concentration interface in established ControlLogix installations.
Technical Specifications — MVI56E-MNETC
| Parameter | Value |
|---|---|
| Product Model | MVI56E-MNETC |
| Manufacturer | ProSoft Technology |
| Product Type | Modbus TCP/IP Multi-Client/Server Communication Module |
| Platform | Rockwell Automation ControlLogix |
| Backplane | Single-slot 1756-compatible |
| Client Connections | Up to 30 |
| Server Connections | Up to 40 |
| Ethernet | 10/100 Base-T |
| Connector | RJ45 |
| Data Memory | Up to 5000 16-bit registers |
| Configuration | ProSoft Configuration Builder |
| Integration | RSLogix 5000 / Studio 5000 AOI or ladder logic |
| Backplane Current | 800 mA @ 5 VDC; 3 mA @ 24 VDC |
| Operating Temperature | 0 to 60°C |
| Humidity | 5–95%, non-condensing |
| Mounting | ControlLogix 1756 chassis |
| Typical Application | PLC, DCS, SCADA and Modbus TCP device integration |
Specifications are based on ProSoft’s current product documentation.
ProSoft MVI56E-MNETC
Key Features and Benefits — MVI56E-MNETC
- Supports simultaneous Modbus TCP client and server operation.
- Up to 30 client connections for multi-device polling.
- Up to 40 server connections for HMI, SCADA, or DCS access.
- 10/100 Mbps Ethernet with automatic crossover detection.
- User-definable internal data mapping simplifies register organization.
- Remote configuration and diagnostics are supported through ProSoft tools and CIPconnect.
- Backward compatibility helps migrate existing MVI56-MNET applications.
For legacy ControlLogix systems, configuration files and ladder/AOI logic are just as important as the hardware. Personally, I would retain a verified configuration backup with the spare module rather than treating the replacement as a hardware-only swap.
ProSoft MVI56E-MNETC
Related Models
MVI56E-MNETCXT — Functionally equivalent enhanced version with conformal coating and an extended temperature range for harsher environments.
MVI56E-MNETCR — Reduced-I/O-data-block version intended primarily for remote ControlLogix chassis applications.
MVI56-MNETC — Earlier Modbus TCP/IP client architecture that provided the basis for the enhanced generation.
MVI56E-MNET — Enhanced Modbus TCP/IP communication module family for ControlLogix applications, with related client/server functionality.
Installation and Maintenance — MVI56E-MNETC
Before replacement, remove power from the relevant ControlLogix chassis according to site procedures and record the module IP address, firmware version, configuration file, and AOI or ladder-logic association. Verify the chassis slot and Ethernet network configuration before commissioning.
Check RJ45 connections, shielded cabling, switch configuration, and Modbus register mapping during troubleshooting. The module’s internal addressing supports bit-level and 16-bit word-level data, so incorrect register interpretation can produce valid-looking but incorrect process values.
Product Warranty — MVI56E-MNETC
Warranty coverage depends on supplier, condition, test status, and purchase agreement. For refurbished units, request a communication test and verify firmware and configuration compatibility. The ProSoft MVI56E-MNETC should be matched to the ControlLogix chassis, Modbus TCP network architecture, and application configuration before commissioning.
