MVI56E-MCMR ControlLogix Enhanced Modbus Master/Slave Communications Interface Module with Reduced Data Block

MVI56E-MCMR ControlLogix Enhanced Modbus Master/Slave Communications Interface Module with Reduced Data Block

The MVI56E-MCMR Enhanced Modbus Master/Slave Communication Module with Reduced Data Block allows Rockwell Automation® ControlLogix® processors to easily interface with devices using the Modbus RTU/ASCII serial communications protocol. Compatible devices include a wide variety of instruments, process measurement devices, popular brands of programmable logic controllers (PLCs) and programmable automation controllers (PACs).

The MVI56E-MCMR acts as an input/output module on the ControlLogix backplane, making Modbus data appear as I/O data to the processor. Backplane data transfers to and from the processor are asynchronous from communications on the Modbus network. Two independently-configurable serial ports can operate on the same or different Modbus networks. Each port can be configured as a Modbus Master or Slave, sharing the same user-controlled 5000-word database.

The MVI56E-MCMR utilizes a reduced Input/Output (I/O) data block for transferring data to and from a ControlLogix processor. This reduced data block makes it ideal for use in remote rack applications over ControlNet™. For EtherNet/IP™ applications where bandwidth is not an issue, it is strongly recommended to use the MVI56E- MCM.

Features and Benefits

Features	Benefits
Backward Compatibility	All MVI56E products are backward-compatible allowing direct replacement of earlier MVI56 modules without the need to change existing controller programs Enjoy Enhanced features and flexibility without incurring expensive reprogramming costs
Reduced Data Block	Reduced Data Block implementation requires less backplane/network bandwidth Smaller data blocks are easier to schedule and transfer on ControlNet networks Ideal solution for remote chassis installations using ControlNet and redundant controllers
CIPconnect-enabled	ProSoft Configuration Builder software (PCB), with CIPconnect, facilitates remote user access across the ControlLogix backplane through Rockwell Automation's 1756-ENBT module Configure, diagnose, and analyze process data and communications status CIPconnect can bridge through multiple ENBT/CNBT links to connect to MVI56E-MCMRs installed in remote chassis for configuration and diagnostics
4-digit LED display	See critical configuration and status information without having to hook up to the ports

Specifications

Backward-compatible with previous MVI56-MCMR version
Single Slot - 1756 ControlLogix® backplane compatible
10/100 MB Ethernet port for configuration with Auto Cable Crossover Detection
User-definable module data memory mapping of up to 5000 16-bit registers
CIPconnect®-enabled network configuration and diagnostics monitoring using ControlLogix 1756-ENxT modules and EtherNet/IP® pass-thru communications
Sample Ladder Logic or Add-On Instruction (AOI) used for data transfers between module and processor
4-character scrolling LED display of status and diagnostic data in plain English
ProSoft Discovery Service (PDS) software finds the module on the network and assigns a temporary IP address to facilitate module access and configuration
Personality Module (non-volatile CF card) to store all configuration settings, allowing quick in-the-field product replacement by transferring the CF card

Modbus General Specifications

Communication Parameters	Baud Rate: 110 baud to 115.2 kbps 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 and Daniel implementations
Modbus Function Codes	1: Read Coils Status 2: Read Input Status 3: Read Holding Registers 4: Read Input Registers 5: Force (Write) Single Coil 6: Preset (Write) Single Register 8: Diagnostics 15: Force (Write) Multiple Coils 16: Preset (Write) Multiple Data Registers 17: Report Slave ID 22: Mask Write 4x Register 23: Read/Write 4x Registers