What’s the problem with the PID control in the Hilscher DCS system not being able to regulate the liquid level?
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The set value is between 60% and around 40%; it can’t go any higher. The operation in manual mode is normal, but the liquid level often drops automatically, and it’s not possible to control the level. What could be the problem, and how can it be resolved?
Adjust the PID based on actual process exploration
Automatic mode won’t work; if it’s a single-loop system, it’s likely that the PID parameters haven’t been adjusted properly
Could it not be a problem with the valve positioner?
Check the output changes automatically and adjust the PID parameters appropriately.
Agree with the people above; re-tune the PID parameters!
I don’t think so; by using manual control, it’s still possible to regulate the liquid level.
I think there are issues with the PID parameters of Valve 1, the linearity of Valve 2 is poor, and the software algorithm for Valve 3 is unreasonable.