P
I'm looking for a calculationsheet to determine the P, I and D parameters by the Ziegler Nichols method. I have to calculate the PID-parameters before the installation goes in operation. I'm programming a coolingwater installation with a temperature and a pressure control loop (PID). The controller is a Siemens S7 controller using the standard PID-controller function (FB41), it would be nice if somebody also had an example project with the FB41.