Siemens SIMATIC S7-1200 - Page 322

Instructions
9.2 PID_3Step
PID control
322 Function Manual, 03/2017, A5E35300227-AC
Tag
Data type
Default
Description
SavePosition REAL 0.0 Substitute output value
If ErrorBehaviour = TRUE, the actuator is moved to a posi-
tion that is safe for the plant when an error occurs. As soon
as the substitute output value has been reached, PID_3Step
switches the operating mode according to ActivateRecov-
erMode.
CurrentSetpoint REAL 0.0 Currently active setpoint. This value is frozen at the start of
tuning.
CancelTuningLevel REAL 10.0 Permissible fluctuation of setpoint during tuning. Tuning is
not canceled until:
• Setpoint > CurrentSetpoint + CancelTuningLevel
or
• Setpoint < CurrentSetpoint - CancelTuningLevel
Progress
REAL
0.0
Progress of tuning as a percentage (0.0 - 100.0)
Config.InputPerOn BOOL TRUE If InputPerOn = TRUE, the Input_PER parameter is used. If
InputPerOn = FALSE, the Input parameter is used.
Config.OutputPerOn BOOL FALSE If OutputPerOn = TRUE, the Output_PER parameter is
used. If OutputPerOn = FALSE, the Ouput_UP and Out-
put_DN parameters are used.
Config.InvertControl BOOL FALSE Invert control logic
If InvertControl = TRUE, an increasing control deviation
causes a reduction in the output value.
Config.FeedbackOn BOOL FALSE If FeedbackOn = FALSE, a position feedback is simulated.
Position feedback is generally activated when Feed-
backOn = TRUE.
Config.FeedbackPerOn BOOL FALSE FeedbackPerOn is only effective when Feed-
backOn = TRUE.
If FeedbackPerOn = TRUE, the analog input is used for the
position feedback (Feedback_PER parameter).
If FeedbackPerOn = FALSE, the Feedback parameter is
used for the position feedback.
Config.ActuatorEndStopOn BOOL FALSE If ActuatorEndStopOn = TRUE, the digital position feedback
Actuator_L and Actuator_H are taken into consideration.
Config.InputUpperLimit REAL 120.0 High limit of the process value
Input and Input_PER are monitored to ensure adherence to
this limit.
At the I/O input, the process value can be a maximum of
18% higher than the standard range (overrange). An error is
no longer signaled due to a violation of the "Process value
high limit". Only a wire-break and a short-circuit are recog-
nized and PID_3Step reacts according to the configured
reaction to error.
InputUpperLimit > InputLowerLimit
Config.InputLowerLimit REAL 0.0 Low limit of the process value
InputLowerLimit < InputUpperLimit