Instructions
9.2 PID_3Step
PID control
Function Manual, 03/2017, A5E35300227-AC
335
If several errors are pending simultaneously, the values of the ErrorBits are displayed with
binary addition. The display of ErrorBits = 0003h, for example, indicates that the errors
0001h and 0002h are pending simultaneously.
If there is a position feedback, PID_3Step uses ManualValue as output value in manual
mode. The exception is Errorbits = 10000h.
0001 The "Input" parameter is outside the process value limits.
• Input > Config.InputUpperLimit or
• Input < Config.InputLowerLimit
If automatic mode was active before the error occurred and ActivateRecoverMode = TRUE, PID_3Step
remains in automatic mode.
If pretuning, fine tuning, or transition time measurement mode and ActivateRecoverMode = TRUE were
active before the error occurred, PID_3Step switches to the operating mode that is saved in the Mode
0002 Invalid value at "Input_PER" parameter. Check whether an error is pending at the analog input.
If automatic mode was active before the error occurred and ActivateRecoverMode = TRUE, PID_3Step
switches to "Approach substitute output value with error monitoring" or "Error monitoring" mode. As
soon as the error is no longer pending, PID_3Step switches back to automatic mode.
If pretuning, fine tuning, or transition time measurement mode and ActivateRecoverMode = TRUE were
active before the error occurred, PID_3Step switches to the operating mode that is saved in the Mode
0004 Error during fine tuning. Oscillation of the process value could not be maintained.
If ActivateRecoverMode = TRUE before the error occurred, PID_3Step cancels the tuning and switches
to the operating mode that is saved in the Mode parameter.
0010 The setpoint was changed during tuning.
You can set the permitted fluctuation of the setpoint at the CancelTuningLevel tag.
If ActivateRecoverMode = TRUE before the error occurred, PID_3Step cancels the tuning and switches
to the operating mode that is saved in the Mode parameter.
0020 Pretuning is not permitted during fine tuning.
If ActivateRecoverMode = TRUE before the error occurred, PID_3Step remains in fine tuning mode.
0080 Error during pretuning. The output value limits are not configured correctly or the actual value does not
react as expected.
Check whether the limits of the output value are configured correctly and match the control logic.
Also make sure that the actual value does not oscillate strongly before starting pretuning.
If ActivateRecoverMode = TRUE before the error occurred, PID_3Step cancels the tuning and switches
to the operating mode that is saved in the Mode parameter.
0100 Error during fine tuning resulted in invalid parameters.
If ActivateRecoverMode = TRUE before the error occurred, PID_3Step cancels the tuning and switches
to the operating mode that is saved in the Mode parameter.
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