... kinds of PLC (or the other intelligent controllers with communication ports). With MD204LV04, both the values of the PLC inner registers and ... engineer needn't program of communication. 3. It can work with most popular PLC, including SIEMENS, MITSUBISHI, OMRON, SCHNEIDER, FACON, ... selected. Any of RS232, RS422 and RS485 is OK. 9. STN LCD with background lights, 4 rows (24 western characters in every ...