Siemens SIMATIC S7-1200 Function Manual page 367

Automatic switchover of operating mode in automatic mode (PID_3Step V1.1)
PID_3Step automatically switches the operating mode in the event of an error. The following
diagram illustrates the influence of ErrorBehaviour and ActivateRecoverMode on this
switchover of operating mode.
Automatic switchover of operating mode in the event of an error
Automatic switchover of operating mode once the current operation has been completed.
PID control
Function Manual, 03/2017, A5E35300227-AC
Instructions
9.2 PID_3Step
367