If I have a RS-485 Communication, how can I know which PLC language I can use for a PLC-Drive communication?

Question

If I have a RS-485 Communication, how can I know which PLC language I can use for a PLC-Drive communication?

Answer 1

You need to find out what communications protocols are offered with the drive and with the PLC. You need to select a drive and PLC that have at least one protocol in common.

Since you say that you "have a RS-485 communication," you must already have a drive and/or a PLC that has an RS-485 port. You must then find out what protocols are available for use. The equipment that you have may or may not have any protocol actually installed. If there is a protocol installed, the same protocol may or may not be available or installed on both both the drive and PLC. Look at the product documentation. If you have the same protocol on both, obtain the manufacturer's instructions. If you don't have matching protocols, contact the manufacturers to see what other protocols are available.

Edit 1

I believe that the most common protocols that can be used with RS-485 are Modbus, Profibus, BACnet and Interbus. If the PLC supports a particular protocol, the PLC programming language will have have provisions to send and receive messages that conform to that protocol. The drive would not be programmed except to enable or disable its response of received commands and queries that conform to the supported protocol.