Siemens SIMATIC S7-1200 Function Manual page 366

Instructions
9.2 PID_3Step
Automatic switchover of operating mode during commissioning
PID_3Step automatically switches the operating mode in the event of an error. The following
diagram illustrates the influence of ErrorBehaviour on the switchover of operating mode from
transition time measurement, pretuning, and fine tuning modes.
Automatic switchover of operating mode in the event of an error
Automatic switchover of operating mode once the current operation has been completed.
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Function Manual, 03/2017, A5E35300227-AC
PID control