Dear all . 

I made a program for boiler tank using TIA V15 , the program consists of 2 PID blocks in OB30 . 

but the PID didn’t work automatically until i opened the PID block settings and choose start PID as shown in the picture . 

and when i switched off the power then switched it on again , i must open the PID block setting and choose start PID also !! 

I need your help to solve the problem . 

thank you .

Hello,

which PID do you use? (PID_Compact, PID_Temp, Cont_C, Cont_S...)

Do you tune your PID and save the parameter?

Maybe is this link helpful

PID Control with PID_Compact for SIMATIC S7-1200/S7-1500

regards
CaOd

Hi

I think because it's still in pretunning mode, first tune it and then change the mode to automatic, don't forget to update the project and online mode.

regards

T_Ebrahem

I already tuned it but it gave me the message ( tuning in progress ) and still for a long time without change to message " PID is tuned " 

is it normal ??