I have a process that I would like to model in order to tune my PID controller. For this I want to perform a closed-loop step test.
What PID configuration do I need for the test? For example all the articles I can find show a PID response with no overshoot, so do I configure my PID controller for the largest gain with no overshoot? Or does the amount of gain not matter as long as there is no overshoot?
It seems like a catch-22 having to tune the PID to model the process in order to tune the PID. What am I missing here?
Note - each run of the PID controller takes me 15/20 minutes, so I would prefer to model it rather than repeatedly run tests and tweak.