How to adjust PID control after changing the liquid level measurement range
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For example, in a level gauge where 100% level originally corresponded to 500 mm, but after the sampling point was changed, 100% now corresponds to 1000 mm. How should the PID control parameters of the valve connected to it be adjusted?
This post was last edited by chensf123 on 2011-9-18 02:00. In this control system, the adjustment channels remain unchanged; it is the plant element that has changed, with the time constant of the controlled object increasing. If the original PID parameters are still used, the transition time will increase. If PI control is used, the proportional gain and integral time should be reduced to enhance the control effect. (Regulation mode optional: P or PI)
This probably doesn’t need to be changed; just adjusting the corresponding range of control should suffice.
Reply to 2# chensf123: If it is PI control, do both P and I need to be reduced?