... PLC (or the other intelligent controllers with communication ports). With MD204LV04, both the values of the ... 't program of communication. 3. It can work with most popular PLC, including SIEMENS, MITSUBISHI, OMRON, ... as function keys, there is a keyboard for numeric input. The manipulation is simple. Some ... , RS422 and RS485 is OK. 9. STN LCD with background lights, 4 rows (24 western characters in ...