Description
ProSoft MVI56-MCMR Modbus Communication Module
The ProSoft MVI56-MCMR, also cataloged as the MVI56-MCMR Modbus Communication Module, provides Modbus RTU and ASCII communication through a ControlLogix backplane interface.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MVI56-MCMR |
| Brand | ProSoft |
| Product Type | Modbus Communication Module with Reduced Data Block |
| Platform | ControlLogix |
| Communication Interface | Modbus RTU / ASCII |
| CFG Port | RJ45; DB-9M with supplied cable; RS-232 only |
| Modbus RTU | Binary mode with CRC-16 error checking |
| Modbus ASCII | ASCII mode with LRC error checking |
| Baud Rate | 110 to 115K baud |
| Stop Bits | 1 or 2 |
| Data Size | 7 or 8 bits |
| Parity | None, Even, or Odd |
| RTS Timing Delays | 0 to 65535 ms |
| Backplane Current Load | 800 mA at 5 VDC; 3 mA at 24 VDC |
| Operating Temperature | 0 deg C to 60 deg C |
| Storage Temperature | -40 deg C to 85 deg C |
| Relative Humidity | 5% to 95%, non-condensing |
| Shock | 30 g operational; 50 g non-operational |
| Vibration | 5 g from 10 Hz to 150 Hz |
| Floating Point Data | Supported |
| Floating Point Implementations | Enron, Daniel, and other configurable implementations |
| Weight | 0.40 lb |
| Dimensions | Not specified in supplied data |
| Power Consumption | Not specified; backplane current load is 800 mA at 5 VDC and 3 mA at 24 VDC |
| Network Platform Compatibility | ControlLogix; EtherNet/IP and ControlNet system environments |
Protocol Conversion and Serial Communication
The MVI56-MCMR provides Modbus RTU and Modbus ASCII processing for ControlLogix-based automation architectures. Serial communication uses configurable baud rate, data size, parity, stop bits, and RTS timing delays.
RTU transfers use binary data with CRC-16 error checking, while ASCII transfers use LRC error checking. Floating point data movement supports configurable Enron, Daniel, and other implementation formats.
The CFG port provides RS-232 communication through an RJ45 interface or DB-9M connection using the supplied cable. The specified configuration interface is RS-232 only.
The module uses a reduced data block architecture for exchanging Modbus data with the ControlLogix backplane. Backplane loading is specified as 800 mA at 5 VDC and 3 mA at 24 VDC.
Frequently Asked Questions (FAQ)
Q: What serial interface is provided through the CFG port?
A: The CFG port supports RS-232 only and uses an RJ45 connector or DB-9M connection with the supplied cable.
Q: Which Modbus operating modes are supported?
A: The module supports Modbus RTU with CRC-16 error checking and Modbus ASCII with LRC error checking.
Q: Does the MVI56-MCMR support floating point data?
A: Yes. Floating point data movement supports configurable Enron, Daniel, and other implementation formats.
Field Installation Guidelines
Install the module in the specified ControlLogix chassis position and verify the backplane power budget before energizing the rack. Confirm that the available 5 VDC backplane capacity accommodates the specified 800 mA current load.
Route RS-232 communication wiring separately from high-voltage power conductors and high-current switching circuits. Maintain appropriate physical separation where parallel routing could introduce electromagnetic interference.
Use shielded communication cable where required by the installation environment. Terminate cable shields according to the site grounding design, avoiding unintended ground loops between separately referenced equipment.
Verify serial parameters at both communication endpoints before commissioning. Baud rate, data size, parity, stop bits, and RTS timing must match the connected Modbus equipment.
Protect the module and communication cabling from condensation, excessive vibration, and temperatures outside the specified operating range. Confirm connector seating and cable strain relief before applying system power.
During troubleshooting, verify the ControlLogix backplane connection, RS-232 wiring, serial configuration, Modbus mode, and error-checking method before modifying application data mappings.
Features
We welcome bulk orders and have a minimum order quantity of just one unit.
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.