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HOME ⊙ Rockwell ⊙ Rockwell ProSoft MVI56-MCM Modbus master-slave communication module
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Rockwell ProSoft MVI56-MCM Modbus master-slave communication module

来源: | 作者:FAN | 发布时间 :2025-09-03 | 8 次浏览: | Share:

Rockwell ProSoft MVI56-MCM Modbus master-slave communication module

The MVI56 Modbus Master/Slave Communication Module allows Rockwell Automation® ControlLogix® processors to interface easily with other Modbus protocol compatible devices.

The module acts as an Options module between the Modbus network and the ControlLogix backplane. 

Compatible devices include not only Modicon® PLCs (almost all support the Modbus protocol) but also a wide range of process and control devices from a variety of manufacturers.

Many SCADA packages also support the Modbus protocol.


Features Benefits
Licensed Backplane Technology
 Manufactured under license from Rockwell Automation®
 High-speed data transfer between MVI56 module and ControlLogix processor
 Installs as a Generic 1756 module, sample ladder logic included
 View module data and status in RSLogix™ 5000 controller tags
Modbus slave protocol interface
 Emulate Modbus slave device on each individually-configurable application port
 Supports Modbus RTU and Modbus ASCII protocol versions
 Floating-point data movement supported, including support for Enron, Daniel®, and other implementations
 Suitable for SCADA and field device interface applications
Easy to Configure and Monitor
 Configure and monitor parameters and data in RSLogix
 LED diagnostics for at-a-glance health check
 Easy to use menu-driven hardware and protocol diagnostics
 View module database contents through serial connection to desktop PC
Backed by ProSoft Technology
 20-year history of delivering high-quality, reliable solutions designed with you in mind
 Free, unlimited, worldwide Technical Support by phone for pre-sale, set-up, or
troubleshooting support helps you get going sooner and stay running longer
 Three-Year Warranty ensures reliability and protects against equipment failures
 Free ProSoft software tools tightly integrate with our hardware...a simple and quick, total

solution to help you make our products fit your applications

Configuration
All module configuration is defined in the Sample Ladder Logic. The sample ladder is fully commented, and includes user defined data types, ladder rungs and controller tags. For most applications, the sample ladder can be used without modification. 

General Specifications
 Single Slot - 1756 backplane compatible
 Local or remote rack
 The module is recognized as an Input/Output module and has access to processor memory for data transfer between processor and module
 Ladder Logic is used for data transfer between module and processor.

 Configuration data obtained through user-defined ladder. Sample ladder file included


General Specifications - Modbus Master/Slave
Communication Parameters
Baud rate: 110 to 115K baud
Stop bits: 1 or 2
Data size: 7 or 8 bits
Parity: None, Even, Odd
RTS timing delays: 0 to 65535 milliseconds
Modbus Modes
RTU mode (binary) with CRC-16
ASCII mode with LRC error checking
Floating-Point Data
Floating-point data movement supported, including configurable
support for Enron, Daniel®, and other implementations
Modbus Function Codes Supported
1: Read Coil Status
2: Read Input Status
3: Read Holding Registers
4: Read Input Registers
5: Force (Write) Single Coil
6: Preset (Write) Single
Holding Register
8: Diagnostics (Slave Only,
Responds to
Subfunction 00)
15: Force( Write) Multiple Coils
16: Preset (Write) Multiple
Holding Registers
17: Report Slave ID (Slave Only)
22: Mask Write Holding
Register (Slave Only)
23: Read/Write Holding
Registers (Slave Only)

Hardware specifications and interfaces

（1） Basic hardware parameters

Detailed description of specification category

Backboard current consumption: 800mA at 5VDC; 3mA at 24Vdc

Working temperature: 0 ° C -60 ° C (32 ° F -140 ° F)

Storage temperature -40 ° C -85 ° C (-40 ° F -185 ° F)

Impact resistance performance working state: 30g; non working state: 50g

Anti vibration performance 5g at frequencies of 10Hz-150Hz

Relative humidity 5% -95% (non condensing)

LED indicator light module status light, backplane transmission status light, application status light, serial activity light

（2） Interface configuration

The module provides multiple dedicated interfaces to meet configuration, communication, and expansion requirements:

Configure/debug ports (CFG):

Interface type: RJ45 (including matching DB-9M adapter cable)

Communication standard: Only supports RS-232

Purpose: To connect to a PC for module configuration, diagnosis, and database viewing.

Application ports (PRT1&PRT2):

Interface type: RJ45 (including matching DB-9M adapter cable)

Communication standard: Supports RS-232/485/422, with full hardware handshake control (suitable for radio stations, modems, and multi machine networking scenarios)

Communication parameters: baud rate 110-115200 baud (depending on the protocol); Data bits 5/6/7/8; Stop position 1/2; Check bit none/odd/even; RTS switch delay 0-65535 milliseconds (software configurable).

（3） Accompanying accessories

RJ45 to DB-9M cable (1 per port)

6-foot RS-232 configuration cable


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