saultgeorge
Lifetime Supporting Member
Hey folks. I am getting ready to light off a large AHU and I have a couple of PID questions that I need answers to right away. I have researched the A-B user manuals but it's easier to ask you, Ha.
First, let's say my process variable is a temperature and I'm going to control that temperature with a control variable that will increase or decrease the percentage that a gas valve is open to run a burner in the AHU. So in the configuration tab, do I set the control action at PV-SP or the other way? What does that action do as far as the operation of the PID? Is that an inverse action/reaction?
Secondly, I'm not using the derivative, so what's the basic get started settings for P and I? I have them at: P 5.0, I .0009. What do I change to either slow down the change in the valve percent or speed it up?
My settings are: Loop update time: 2 sec. DB value 5.0 with no zero crossing enabled, and no output bias. This is a PID in RS 5000 v. 20.04. Thanks for all your knowledge and your willingness to share.
First, let's say my process variable is a temperature and I'm going to control that temperature with a control variable that will increase or decrease the percentage that a gas valve is open to run a burner in the AHU. So in the configuration tab, do I set the control action at PV-SP or the other way? What does that action do as far as the operation of the PID? Is that an inverse action/reaction?
Secondly, I'm not using the derivative, so what's the basic get started settings for P and I? I have them at: P 5.0, I .0009. What do I change to either slow down the change in the valve percent or speed it up?
My settings are: Loop update time: 2 sec. DB value 5.0 with no zero crossing enabled, and no output bias. This is a PID in RS 5000 v. 20.04. Thanks for all your knowledge and your willingness to share.