Hello,

i am facing a problems regarding using FB41 PID block. eventually i have tried the given examples but still not working. PID output is not modulating wrt to the in SP further more its not accepting the manual SP also. I here under attach my code. PID is being called in OB35 and VAT2 is used to put the desired values. Please go through the code and guide.

 Your program never reacts properly to input changes because:

1. Wrong addresses and initial values fed to PID
2. Calling the same instances of PID ,2 times that may overwrite 
3. Revert wrong initial values to meaningful values
4. I made a lot of changes to make it functional

I hope it helps,

hdhosseini