... kinds of PLC (or the other intelligent controllers with communication ports). With MD204LV04, both the values of the PLC inner registers ... engineer needn't program of communication. 3. It can work with most popular PLC, including SIEMENS, MITSUBISHI, OMRON, SCHNEIDER, FACON, ... which can be defined as function keys, there is a keyboard for numeric input. The manipulation is simple. Some of the mechanic ...