I have an application where i need to connect about 50 number of power supply units to a PLC system. The PLC shall be responsible for monitoring the parameters of the power supply and generating setpoints for the power supply units. The problem here is the communication protocol for the power supplies is not a standard industry protocol. Power supply units communicate over propritery protocol which shall be required to be programmed in the PLC. Could some one guide which PLC would support developing propritery protocol.