M0313 and MC0313 are one-to-one industrial-grade protocol conversion modules with a dual communication identity: On the Modbus side: They act as a master station, collecting data from Modbus devices via a TTL interface. On the FF side: They act as a slave station, mapping the collected data to the parameters of the M0313 and MC0313 conversion blocks. Through the channel acces functions of the conversion blocks to AI, AO, DI, and DO function blocks,they provide data support for the FF system.