The MVI94-MCM-MHI interface module is a Modbus master/slave network interface module that is classified under the Flex I/O 1794 series. The MVI94-MCM-MHI interface module allows the Allen-Bradley/Rockwell Automation Flex I/O processors to interface with equipment manufactured by Mitsubishi Heavy Industries and with other Modbus compatible devices or hosts. The MVI94-MCM-MHI interface module is used as an input/output module between the Modbus network and the Allen-Bradley/Rockwell Automation backplane. Normally, the MVI94-MCM-MHI interface module supports an asynchronous data transfer from the Modbus network actions. The MVI94-MCM-MHI interface module is used in various industrial sectors. The suitable application areas include foreign device data concentrators, pipelines, offshore platforms, food processing, mining, SCADA communications environment, and pulp and paper industry applications.

The MVI94-MCM-MHI interface module features support for the storage and transfer of over 5000 registers to and/or from the FLEX I/O processor data files. The memory usage is completely user-definable while the unit features an application port that can emulate the Modbus master or slave device. The MVI94-MCM-MHI interface module also features a port that is configured as a Modbus slave device. This allows for a remote master device to interact with all the data that is contained in the module. The MVI94-MCM-MHI interface module features a port that is configured as a virtual Modbus master device, and it actively issues the Modbus commands to the other nodes used on the Modbus network. The operation uses simple ladder logic and the unit features a complete setup process and monitoring of the module that is possible through the debug port and the configuration file. It also supports the flex backplane interface through the I/O access port.