Siemens SIMATIC S7-1200 Function Manual page 107

Rule for tuning
Select whether PI or PID parameters are to be calculated in the "Controller structure" drop-
down list.
● PID
Calculates PID parameters during pretuning and fine tuning.
● PI
Calculates PI parameters during pretuning and fine tuning.
● User-defined
The drop-down list displays "User-defined" if you have configured different controller
structures for pretuning and fine tuning via a user program.
See also
Downloading technology objects to device (Page 44)
PID control
Function Manual, 03/2017, A5E35300227-AC
Using PID_Compact
4.3 PID_Compact V1
107