Prosoft MVI46-MCM I/O module

ProSoft Technology MVI46-MCM Modbus Communication Module Overview

The ProSoft Technology MVI46-MCM is a high-performance, in-chassis communication module designed for the Allen-Bradley Logix platform (specifically for the ControlLogix and CompactLogix processors via a rack adapter). It provides seamless integration of Modbus master/slave communication capabilities into a Logix PLC system, allowing the Logix processor to exchange data with a wide range of Modbus-compatible devices.

Product Detailed Description

• Functionality: The MVI46-MCM acts as a powerful communication gateway, enabling Allen-Bradley Logix controllers to communicate with devices using the Modbus protocol.

• Modbus Master: It can act as a Modbus Master, initiating communication and requesting data from Modbus Slave devices (e.g., VFDs, smart sensors, power meters, RTUs). This allows the Logix PLC to read data from these devices and write control commands to them.

• Modbus Slave: It can also act as a Modbus Slave, responding to requests from external Modbus Master devices. This allows other Modbus Masters to read data from or write data to the Logix PLC through the MVI46-MCM module.

• Data Exchange: It transparently exchanges data between the Modbus network and the Logix PLC's data tables, using a dedicated memory area within the module that is mapped to Logix tags.

• Architecture:

• It's an in-chassis module, meaning it plugs directly into a ControlLogix or CompactLogix rack (via an adapter for CompactLogix).

• It uses multiple serial ports (typically RS-232, RS-485, and/or RS-422) to connect to the Modbus network.

• Key Features:

• Dual Port Design: Often comes with two independent serial communication ports, allowing for simultaneous master/slave operations or connection to two separate Modbus networks.

• Configurable Protocols: Supports Modbus RTU (serial) and Modbus ASCII (serial).

• Floating Point Data Handling: Capable of handling various data types, including floating-point data, which is common in many industrial devices.

• Diagnostic Features: Includes LED indicators for communication status, module status, and network activity. Built-in diagnostics are often accessible through the configuration software.

• Auto-Configuration: Simplifies setup for common Modbus devices.

• User-Friendly Configuration: Typically configured using ProSoft Configuration Builder (PCB) software, which integrates with Rockwell Automation's programming environments (e.g., RSLogix 5000/Studio 5000).

• Local and Remote Diagnostics: Allows for troubleshooting and monitoring of Modbus communications from within the Logix environment or remotely.

Product Parameters

(Note: Specific parameters can vary slightly based on the exact firmware version or minor revisions. Always refer to the official ProSoft Technology MVI46-MCM manual and datasheet for definitive specifications.)

• Platform Compatibility: Allen-Bradley ControlLogix processors, CompactLogix processors (requires 1769-AENTR or similar rack adapter).

• Communication Ports: Typically 2 x Serial Ports (e.g., Port 1: RS-232/RS-422/RS-485 configurable; Port 2: RS-232/RS-485 configurable).

• Modbus Protocols Supported: Modbus RTU Master/Slave, Modbus ASCII Master/Slave.

• Baud Rates: Configurable, typically ranging from 1200 bps to 115.2 kbps.

• Parity: None, Even, Odd.

• Data Bits: 7 or 8.

• Stop Bits: 1 or 2.

• Modbus Functions Supported (Master): Generally supports a wide range of function codes (e.g., 01, 02, 03, 04, 05, 06, 15, 16, 23).

• Modbus Functions Supported (Slave): Generally supports standard read/write function codes (e.g., 03, 04, 06, 16).

• Data Capacity: Internal memory for Modbus data exchange (e.g., hundreds or thousands of Modbus registers/coils).

• Current Draw: Typically around 800 mA at 5 VDC (from the backplane).

• Operating Temperature: 0°C to 60°C (32°F to 140°F).

• Storage Temperature: -40°C to 85°C (-40°F to 185°F).

• Relative Humidity: 5% to 95% non-condensing.

• Vibration: Meets IEC 60068-2-6.

• Shock: Meets IEC 60068-2-27.

• Certifications: CE, UL/cUL (Class 1, Div 2 hazardous locations approval available for some variants), ATEX, IECEx, RoHS.

Product Advantages

• Seamless Logix Integration: Designed specifically for the Logix platform, it provides a native in-chassis solution that simplifies configuration and data mapping within RSLogix 5000/Studio 5000.

• Eliminates External Gateways: By handling Modbus communication directly within the PLC chassis, it reduces the need for external protocol converters, simplifying architecture, wiring, and troubleshooting.

• High Performance: Dedicated communication processor offloads Modbus polling from the Logix CPU, improving overall system performance and responsiveness.

• Flexible Modbus Communication: Supports both Master and Slave modes simultaneously or independently, offering versatility for various network architectures.

• Extensive Protocol Support: Handles both Modbus RTU and ASCII, covering a broad range of serial Modbus devices.

• Advanced Diagnostics: Comprehensive diagnostic tools and status indicators simplify commissioning and ongoing troubleshooting.

• Reliability: Built for industrial environments, ensuring robust and dependable communication.

• Global Support: ProSoft Technology is well-regarded for its technical support.

Precautions

• Firmware Compatibility: Ensure the module's firmware version is compatible with your Logix processor's firmware and the version of RSLogix 5000/Studio 5000 being used.

• Power Consumption: Verify that the Logix chassis power supply has sufficient capacity to power the MVI46-MCM module along with other modules in the rack.

• Proper Wiring: Strictly adhere to the wiring diagrams for RS-232, RS-485, or RS-422 connections, paying close attention to termination resistors for RS-485 networks. Incorrect wiring is a common source of communication issues.

• Modbus Addressing: Carefully configure Modbus slave IDs, register addresses, and data types (e.g., signed/unsigned, byte/word swap, floating point formats) to match the specifications of the connected Modbus devices.

• Configuration Software: Use the correct version of ProSoft Configuration Builder (PCB) software for configuring the module.

• ESD Protection: Take electrostatic discharge (ESD) precautions when handling the module, especially when installing or removing it from the chassis.

• Environmental Conditions: Install the module within its specified operating temperature and humidity ranges.

• Diagnostics Utilization: Familiarize yourself with the module's diagnostic LEDs and diagnostic data available through the Logix controller to aid in troubleshooting.

• Manual Reference: Always refer to the latest ProSoft Technology MVI46-MCM user manual for detailed installation instructions, wiring diagrams, configuration procedures, and troubleshooting guides.

Product Applications

The ProSoft Technology MVI46-MCM module is essential in a wide range of industrial automation applications where Modbus serial communication is required for Logix-based control systems.

• Building Automation Systems (BAS): Integrating HVAC units, lighting controls, power meters, and fire alarm panels that use Modbus.

• Oil & Gas: Communicating with RTUs, flow computers, wellhead equipment, and motor control centers (MCCs) in upstream, midstream, and downstream operations.

• Water & Wastewater Treatment: Connecting to variable frequency drives (VFDs) for pumps, flow meters, level sensors, and remote terminal units (RTUs) for process control.

• Power & Energy Management: Gathering data from power meters, switchgear, and energy monitoring devices to optimize energy consumption and manage electrical grids.

• Manufacturing & Process Control: Interfacing with a wide array of Modbus-enabled sensors, actuators, drives (VFDs), and other field devices on production lines.

• Food & Beverage: Controlling mixers, conveyors, and packaging machinery that utilize Modbus devices.

• Pharmaceutical: Integrating Modbus instruments and equipment into validated control systems.

• Mining & Metals: Communicating with heavy machinery, conveyors, and ventilation systems.

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