Rob735
Member
Hey Guys, I am looking for some suggestions on controlling a VFD with a 4~20ma signal from a ML1400 with a spectrum 1762sc-0f8 expansion card.
I have been trying to us a PID control but am not happy with how wrappedly the output moves.
Also I am not sure how I am going to program my ramp up time as it is required to start and runn at minimum speed for 16 minutes before it will then begin to let the VFD work its magic.
Any suggestions on how to hold it at it's minimum?
Rob
I have been trying to us a PID control but am not happy with how wrappedly the output moves.
Also I am not sure how I am going to program my ramp up time as it is required to start and runn at minimum speed for 16 minutes before it will then begin to let the VFD work its magic.
Any suggestions on how to hold it at it's minimum?
Rob