Dual 4-20mA to 1 Output

[KC30803]

Hi all,
I have the circuit attached as a way to ramp voltage up and down based on a customer's input of dual 4-20mA signals. This will then be turned into a PWM signal to control our motor. Is there a graceful way to handle the 4-20mA signals, as there can't be an instantaneous change. The ramp must go to zero before ramping up again (forward -> idle -> reverse). Thank you for your help.

 

[Kiribanda]

I have used the following transducer for on-load tap changer applications. It gives 4mA at the one extreme of the tap arrangement
and 20mA output at the other extreme of the tap changer.
Therefore, I believe it works for you.