The inRAx Modbus Master/Slave Communications module is designed to allow ControlLogix processors to interface easily with Modbus protocol-compatible devices and hosts.
The MVI56-MCM module acts as an input/output module between the Modbus network and the Rockwell Automation backplane. The data transfer from the ControlLogix processor is asynchronous from the actions on the Modbus network. A 5000-word register space in the module exchanges data between the processor and the Modbus network.
Many host SCADA packages support the Modbus protocol, while devices commonly supporting the protocol include several PLCs, as well as many other third party devices in the marketplace. (For a partial list of devices that speak Modbus, please visit the ProSoft Tested section of the ProSoft Technology web site).