Thanks for your interest digoff. I have already tried tweaking the system manually and the response is quite acceptable. What I an trying to do is use Ziegler-Nichols ultimate sensitivity tuning method and experiment a bit with it.
Hi All,
I am currently building a test rig for a plc project I am doing, it involves PID control of a pump from the level of a tank. I have built my rig but now I am trying to get the transfer function of it so that I can work out some theory.
Any help on how to work out the transfer...