The ProSoft Technology MVI56E-MNET is an Enhanced Modbus TCP/IP Communication Module designed specifically for the Allen-Bradley ControlLogix platform. This module allows Rockwell Automation processors to interface seamlessly with Modbus TCP/IP-compatible devices, such as power monitors, drives, and other PLCs. The MVI56E-MNET functions as a gateway, enabling the ControlLogix backplane to act as either a Client (Master) or a Server (Slave) on a standard Ethernet network.

 

Product Parameters & Datasheet

The MVI56E-MNET is engineered for high-speed data exchange within the 1756 ControlLogix chassis.

 

Technical Description

The MVI56E-MNET utilizes “Enhanced” features, including an integrated web server for diagnostics and a scrolling LED display for real-time status updates. Unlike standard modules, the “E” series supports the ProSoft Discovery Service (PDS), allowing users to locate the module on the network without knowing its IP address. It uses a large internal database of 5000 16-bit registers to bridge data between the ControlLogix processor and the Modbus network. Data transfer is optimized using block-level communication over the backplane, ensuring minimal impact on the PLC scan time.

 

Country of Origin

This communication module is designed and manufactured in the United States (USA) by ProSoft Technology, Inc., ensuring full compatibility with Rockwell Automation standards and ODVA specifications.

 

Application Fields

The MVI56E-MNET is a critical link in multi-vendor automation environments:

• Energy Management: Interfacing ControlLogix with third-party power meters and protective relays.
• Oil & Gas: Connecting to Flow Computers and SCADA RTUs via Modbus TCP/IP.
• Water Treatment: Integrating VFDs (Variable Frequency Drives) and chemical dosing pumps.
• Data Centers: Monitoring UPS systems and CRAC units within a unified PLC architecture.
• Manufacturing: Bridging legacy Modbus-enabled machinery to a modern Ethernet/IP backbone.

Product Usage Instructions

1. Hardware Installation: Insert the MVI56E-MNET into any available slot in the 1756 ControlLogix chassis. The module is hot-swappable, but it is recommended to power down for permanent installation.
2. Add-On Profile (AOP): Download and install the ProSoft AOP or use the provided Add-On Instructions (AOI) in RSLogix 5000/Studio 5000 to define the module’s I/O tags.
3. Network Configuration: Use the ProSoft Configuration Builder (PCB) software via the Ethernet port or the RS-232 configuration port to set the IP address, Subnet Mask, and Gateway.
4. Client/Server Setup: Define your Modbus commands (Read/Write) within the PCB software. Assign the local database addresses to the corresponding Modbus registers on the target devices.
5. Diagnostics: Monitor the 4-character scrolling LED display. “OK” indicates healthy backplane and network communication. If “MNET” is scrolling, check the Ethernet cable and Modbus timeout settings.