Modbus Master/Slave Enhanced Communication Module
MVI56E-MCM, MVI56E-MCMXT
The MVI56E Modbus Master/Slave Enhanced Communication Modules (MVI56E-MCM, MVI56E-MCMXT) allow Rockwell Automation ControlLogix processors to easily interface with devices using the Modbus RTU/ASCII serial communication protocol.
The MVI56E-MCM and MVI56E-MCMXT act as input/output modules on the ControlLogix backplane, making Modbus data appear as I/O data to the processor. Data transfer to and from the processor is asynchronous from the 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 two modules are functionally the same. The MVI56E-MCM is designed for standard process applications. The MVI56E-MCMXT is designed for the Logix-XT control platform, allowing it to operate in extreme environments, at higher operating temperatures, with a conformal coating to protect it from harsh or caustic conditions.
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Features
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Benefits
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Backward Compatibility
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- All MVI56E Enhanced products are backward-compatible with earlier MVI56 modules, allowing direct replacement without the need to change existing controller programs
- Enjoy Enhanced features and flexibility without incurring expensive reprogramming costs
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RSLogix 5000 Integrated
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- Module configuration and communication is integrated within RSLogix 5000
- No additional programming or configuration software is required
- Add-On Instruction for RSLogix 5000 version 16 or higher cuts development time and costs
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CIPconnect®-enabled
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- ProSoft Configuration Builder software (PCB), with CIPconnect, facilitates remote user access across the ControlLogix backplane through Rockwell Automation's 1756-ENBT or 1756-CNBT modules
- Configure, diagnose, and analyze process data and communication status
- CIPconnect can bridge through multiple ENBT/CNBT links to connect to MVI56E-MCMs installed in remote chassis for configuration and diagnostics
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4-digit LED Display
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- A scrolling display for easily-understood, plain English diagnostic and error information
- See critical configuration and status information without having to hook up to the port
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Ethernet Port
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- Local and remote diagnostics access available through the Ethernet Port
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Configuration
ProSoft Configuration Builder (PCB) provides a PC-based software configuration solution for convenient management of ProSoft Technology modules, as well as viewing module and network diagnostics. PCB provides an excellent diagnostic tool for the module when used with CIPconnect technology, providing communication using local and remote chassis installations. The Setup Guide and sample configuration provide quick start up with step-by-step instructions on how to move data from the Modbus network to the controller.
General Specifications
- Backward-compatible with previous Modbus Master/Slave Module (MVI56-MCM) 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 and for module configuration
- 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
Functional Specifications
- Adjustable Modbus floating-point data support for Enron, Daniels, and other floating-point formats
- Powerful Modbus network analyzer diagnostics using ProSoft Configuration Builder
- Optional ladder logic functions, like Command Control, Event Commands, and Slave Disable/Enable functions, give users options to place normally automatic Modbus polling under logic control for special situations.
- Error codes, network error counters, and port status data available in pre-defined controller tag arrays or may be stored in user data memory
Modbus General Specifications
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Communication parameters
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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
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Modbus Modes
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RTU mode (binary) with CRC-16
ASCII mode with LRC error checking
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Floating Point Data
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Floating-point data movement supported, including configurable support for Enron and Daniel implementations
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Modbus Function Codes
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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
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Modbus Master Specifications
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Command List
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Up to 100 commands per Master port, each fully configurable for function code, slave address, register to/from addressing and word/bit count.
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Optimized Polling
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Configuration options allow Master ports and commands to be optimized to poll slaves with communication problems less frequently.
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Command Status/Error Monitoring
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Command Status or Error codes are generated for each command as it executes, allowing careful monitoring of communication health between the Master and its Slaves.
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Slave Polling Control
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Master Port maintains a Slave Status list of all network Slaves. Polling of each Slave may be disabled and enabled using this list.
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Modbus Slave Specifications
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Full Memory Access
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A port configured as a Modbus Slave permits a remote Master to read from or write to any of the 5000 registers that make up the user memory database.
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Multi-source Slave data
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Data presented at the Slave port can be derived from other Modbus Slave devices on a different network through the module's Master port or from the processor tag database.
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Node address
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1 to 247 (software selectable)
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Status Data
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Slave port error codes, counters and statuses are available separately for each port when configured as a Slave
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Hardware Specifications
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General
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Specification
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Description
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Backplane Current Load
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800 mA @ 5 Vdc
3 mA @ 24 Vdc
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Operating Temperature
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0°C to 60°C (+32°F to +140°F) - MVI56E-MCM
-25°C to 70°C (-13°F to +158°F) - MVI56E-MCMXT
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Storage Temperature
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-40°C to +85°C (-40°F to +185°F)
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Extreme/Harsh Environment
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MVI56E-MCMXT comes with conformal coating
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Shock
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30 g operational
50 g non-operational
Vibration: 5 g from 10 Hz to 150 Hz
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Relative Humidity
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5% to 95% (with no condensation)
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LED Indicators
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Battery Status (ERR)
Application Status (APP)
Module Status (OK)
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4-Character, Scrolling, Alpha-Numeric LED Display
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Shows Module, Version, IP, Port Master/Slave Setting, Port Status, and Error Information
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Debug/Configuration Ethernet port (E1 - Config)
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Ethernet Port
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10/100 Base-T, RJ45 Connector, for CAT5 cable
Link and Activity LED indicators
Auto-crossover cable detection
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Serial Application ports (P1 & P2)
Full hardware handshaking control, providing radio, modem, and multi-drop support
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Software configurable communication parameters
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Baud rate: 110 baud to 115.2 kbps
Parity: none, odd or even
Data bits: 5, 6, 7, or 8
Stop bits: 1 or 2
RTS on/off delay: 0 to 65535 milliseconds
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App Ports (P1, P2)
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RJ45 (DB-9M with supplied adapter cable)
Configurable RS-232 hardware handshaking
500V Optical isolation from backplane
RS-232, RS-422, RS-485 jumper-select, each port
RX (Receive) and TX (Transmit) LEDs, each port
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Shipped with Unit
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RJ45 to DB-9M cables for each serial port
5 foot Ethernet Straight-Thru Cable (Gray)
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Ordering Information
| MVI56E-MCM, MVI56E-MCMXT |
Modbus Master/Slave Enhanced Communication Module |
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| To place an order, please contact your local ProSoft Technology, Inc. distributor. For a list of ProSoft distributors near you, click here. |
Distributors:
Place your order by email to orders@prosoft-technology.com:, fax to +1 661-716-5101.
Sales and Support:
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