Please help with the answer to the question of the right choice of TI and TD parameters for PID FB41 block.
I have a process model in Matlab-simulink, the PID controller is in Step7, FB41 block. Data communication takes place on the OPC protocol. The output of the PID controller (Step7) enters the object in Matlab, where I see the result of the process to scope.
I know that the formula FB41 - K (1 + 1 / Tis + Tds).
Parameters PID controller Matlab I have chosen the following:
I used a variable block FB41 - PV, for input (OPC Read) and output (OPC write).
I also tried to use the signal for the job via the OPC FB41 setpoint (SP_INT), PV ( for the signal after the object) and LMN (for input to object in Matlab).
As a result, in both cases I received a completely different graphics, different from PID controller Matlab and FB41 (Step7) .
How should I choose the parameters of TI and TD, and correctly configure block PID controller FB41 (Step7) knowing the coefficients PID controller Matlab / simulink?
I looked a lot of articles, documentation of FB41, but did not understand how to implement the controller using Matlab and the OPC protocol.
I can send you the Step7 project with the FB41, for example.
I really hope for your help.
Thanks for the answer.