Controller schedulling in OLGA

[nikosmiller]

Hi all!
I want to design a Gain Scheduled Level controller for a 3-ph. separator, say to control water oil level. For the low and high level range will have the same aggressive settings (higher gain and less integral time) while for the mid range I ll use more conservative settings. I thought of a combination of PID's and Selector or Override control.
Any hints?
Secondly, the Process Variable should be normalized between the level taps (low L and high H). I used an algebraic controller that receives the level signal from the tank and then subtracts the low level tap value (L) as a signal from a manualoutput controller and the divides it with the difference (H-L) which is provided by a second manual output controller. It works but is there anything simpler?

[nikosmiller]

Found the answer to the first part of the question. From the ERROR key you can set the errors values (SP-PV) for which the controller settings should be changed. Then, the values for gain, Ti and Td corresponding to these errors should be added at the corresponding keys. Be carefull to add the error values in ascending order.
Any ideas about normalizing input over a range?
I m not sure how NORMRANGE key is used if anyone can help with that too.

[dairi]

its better u play with the restart file, try to range the volume or controller in separator or equipment, run simulation,
save the file from the last restart file, copy or duplicate case and add the last restart fle for the new controller.

its better like that rather u play with the keyword