Siemens SIMATIC S7-1200 Function Manual page 373

Behavior in version 1.0
The ActivateRecoverMode variable determines the behavior in the event of an error in
automatic and manual mode. ActivateRecoverMode is not effective during pretuning, fine
tuning and transition time measurement.
ActivateRecov- Description
erMode
FALSE In the event of an error, PID_3Step switches to "Inactive" or "Approach substitute output value" operat-
ing mode. The controller is activated by a reset or a change in Retain.Mode.
TRUE Errors in automatic mode
If errors occur frequently in automatic mode, this setting has a negative effect on the control response.
In this case, check the ErrorBits parameter and eliminate the cause of the error.
If one or more errors occur, PID_3Step switches to "Approach substitute output value with error monitor-
ing" or "Error monitoring" mode:
0002h: Invalid value at parameter Input_PER.
•
0200h: Invalid value at parameter Input.
•
0800h: Sampling time error
•
1000h: Invalid value at parameter Setpoint.
•
2000h: Invalid value at parameter Feedback_PER.
•
4000h: Invalid value at parameter Feedback.
•
8000h: Error in digital position feedback.
•
With errors 2000h, 4000h and 8000h, PID_3Step cannot approach the configured substitute output
value.
As soon as the errors are no longer pending, PID_3Step switches back to automatic mode.
Errors in manual mode
If one or more of the following errors occur, PID_3Step stays in manual mode:
0002h: Invalid value at parameter Input_PER.
•
0200h: Invalid value at parameter Input.
•
0800h: Sampling time error
•
1000h: Invalid value at parameter Setpoint.
•
2000h: Invalid value at parameter Feedback_PER.
•
4000h: Invalid value at parameter Feedback.
•
8000h: Error in digital position feedback.
•
With errors 2000h, 4000h and 8000h, you cannot move the valve to a suitable position.
See also
PID_3Step V1 static tags (Page 354)
Parameter State and Retain.Mode V1 (Page 361)
PID control
Function Manual, 03/2017, A5E35300227-AC
Instructions
9.2 PID_3Step
373