Siemens SIMATIC S7-1200 Function Manual page 146

Using PID_3Step
5.3 PID_3Step V1
Limiting the output value
You can only exceed or undershoot the output value limits during the transition time
measurement. The output value is limited to these values in all other modes.
Enter the absolute output value limits in the "Output value high limit" and "Output value low
limit" input boxes. The output value limits must be within "Low endstop" and "High endstop".
If no Feedback is available and Output (digital) is set, you cannot limit the output value. The
digital outputs are reset with Actuator_H = TRUE or Actuator_L = TRUE, or after a travel time
amounting to 110% of the motor transition time.
146
Function Manual, 03/2017, A5E35300227-AC
PID control