... that is used with many kinds of PLC (or the other intelligent controllers with communication ports). With MD204LV04, both the values ... . The windows are downloaded with serial port. 2. The PLC communication protocols are downloaded to the MD204LV04 with the data of ... So the engineer needn't program of communication. 3. It can work with most popular PLC, including SIEMENS, MITSUBISHI, OMRON, SCHNEIDER, ...