hello

Thank you for sharing.It is very helpful.But i dont understand the program well mainly to calculate the output of the process formulae.can you share the detail or the link which i can refer to understand it?

Kindly Reply.

Thank you.

Hello Pandiani,

I want to simulate a simple transfer function inside the PLC (S7-300) that I have for tests.

I would like to use your functions.
I can see a little impact on the output signal of the FOPDT, but it is not matching the response time an delay I use. Meaning the gain action is OK, but the dynamic action is too fast compared to what I put for delay and response time.
Do you have any idea why?
Could it be related to the fact that I use a real PLC here? (I am not very familiar with PLCSIM, nor so much with STEP 7 actually...).
To give you some information, I want to use a transfer function Gain=2.5, Delay=5.0s, Response time= 40.0s, and input u is moving +/-20, I use sampling time T=1s.

Anyway, thank you for the help, I guess I couldn't do this by myself.

Regards,

Morvan