Instructions
9.2 PID_3Step
PID control
318 Function Manual, 03/2017, A5E35300227-AC
Output parameters of PID_3Step V2
Table 9- 8 Output parameters of PID_3Step V2
ScaledFeedback REAL 0.0 Scaled position feedback
For an actuator without position feedback, the position of the
actuator indicated by ScaledFeedback is very imprecise.
ScaledFeedback may only be used for rough estimation of
the current position in this case.
Output_UP BOOL FALSE Digital output value for opening the valve
If Config.OutputPerOn =
FALSE, the Output_UP parameter is
used.
Output_DN BOOL FALSE Digital output value for closing the valve
If Config.OutputPerOn = FALSE, the Output_DN parameter
Output_PER INT 0 Analog output value
If Config.OutputPerOn = TRUE, Output_PER is used.
Use Output_PER if you are using a valve as actuator which is
triggered via an analog output and controlled with a continu-
ous signal, e.g. 0...10 V or 4...20 mA.
The value at Output_PER corresponds to the target position
of the valve, e.g. Output_PER = 13824, when the valve is to
SetpointLimit_H BOOL FALSE If SetpointLimit_H = TRUE, the absolute setpoint high limit is
reached (Setpoint ≥ Config.SetpointUpperLimit).
The setpoint is limited to Config.SetpointUpperLimit .
SetpointLimit_L BOOL FALSE If SetpointLimit_L = TRUE, the absolute setpoint low limit has
been reached (Setpoint ≤ Config.SetpointLowerLimit).
The setpoint is limited to Config.SetpointLowerLimit .
InputWarning_H BOOL FALSE If InputWarning_H = TRUE, the process value has reached
or exceeded the warning high limit.
InputWarning_L BOOL FALSE If InputWarning_L = TRUE, the process value has reached or
fallen below the warning low limit.
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