FMS usually stands for Flexible Manufacturing System so it could just be someone has written an application to interface with the Omron. I have come across this type of thing before and the name is often just a name given at that time. It sounds to me that it may well be one of these and is not a standard product, I came across a board with a 8080 microprocessor talking to digital I/O on a Square D PLC and 232 communication to a robot. turned out to be a one-off parallel data to 232 converter. some guy had written an application on the micro board as an interface. however, we could find no trace of the guy who supplied the unit.