What is Direct Action and Reverse Action - Understanding Process Controller Action

[@dhiaamohammed8258]

Hello
We have two type of controllers here (FIC and LIC)
Can you explain to me how can select the direct and reverse acting
Because we have cascade system that means output from LIC is set point to the FIC
and how select the type of control valve when the controllers change

[@InstrumentCalibration]

Thanks for asking me this question. Controller action depends on three factors.
1. Location of Control Valve.
2. Type of Control Valve (ATC & ATO)
3. What is process requirement

[@InstrumentCalibration]

Please give brief description of your question, and I will give the answer of your question

[@palanisamy7137]

Here LIC is direct acting .there is no doubt on that.
Let assume FV valve is Fail close valve only .what is the action will come for slave controller(either direct or reverse)

[@Time4yes]

When are you going to do a video where the valve location is in the output side l?

[@InstrumentCalibration]

Thanks for your suggestion. We would be working on that soon. Stay Tuned !!