VDF analog comunication problem

Hi, in our plant we have different AC drives, and with none of them we can use the analog input for reference (4-20ma) and the analog output for current measurement (4 - 20 mA) at the same time because those work, it’s there any recommendation on how we can solve this?


I think just check the VFD configuration parameters, it should work.

Also, check the VFD technical manual and configuration procedures.

What is your VFD model and make?

Also, you need a additional PID controller either a stand-alone hardware unit or a PLC or DCS system’s PID controllers.