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Controller tuning problem in HYSYS

Controller tuning problem in HYSYS

Controller tuning problem in HYSYS

(OP)
Hi :) my name is napz
i have a problem in using HYSYS. i'm dealing with PID controller and i can't get the oscillation graph.
the kc value for oscillation graph is between converges and diverges graph. the problem is when i set the appropriate kc, HYSYS is running for a few minutes seems like getting start to oscillate, but then there's always an error. the error message is equation failed to converge
does anybody knows why?
thx a lot :)

RE: Controller tuning problem in HYSYS

maybe the occilations becomes so large that you get into a P/T area where the property package equations wont solve?

Best regards

Morten

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