Siemens SIMATIC S7-1200 Function Manual page 272

Instructions
9.1 PID_Compact
Pretuning and fine tuning
ActivateRecov- Description
erMode
FALSE PID_Compact automatically switches to "Inactive" mode in the event of an error. The controller is only
activated by a falling edge at Reset or a rising edge at ModeActivate.
TRUE If the following error occurs, PID_Compact remains in the active mode:
0020h: Pretuning is not permitted during fine tuning.
•
The following errors are ignored:
10000h: Invalid value at ManualValue parameter.
•
20000h: Invalid value at SubstituteOutput tag.
•
When any other error occurs, PID_Compact cancels the tuning and switches to the mode from which
tuning was started.
Manual mode
ActivateRecoverMode is not effective in manual mode.
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Function Manual, 03/2017, A5E35300227-AC
PID control