Siemens SIMATIC S7-1200 Function Manual page 324

Instructions
9.2 PID_3Step
Tag
Config.VirtualActuatorLimit
Config.InputScaling.Upper-
PointIn
Config.InputScaling.Lower-
PointIn
Config.InputScaling.Upper-
PointOut
Config.InputScaling.Lower-
PointOut
Config.FeedbackScaling
.UpperPointIn
Config.FeedbackScaling
.LowerPointIn
Config.FeedbackScaling
.UpperPointOut
Config.FeedbackScaling
.LowerPointOut
324
Data type Default
REAL 150.0
REAL 27648.0
REAL 0.0
REAL 100.0
REAL 0.0
REAL 27648.0
REAL 0.0
REAL 100.0
REAL 0.0
Description
If all the following conditions have been satisfied, the actua-
tor is moved in one direction for the maximum period of
VirtualActuatorLimit × Retain.TransitTime/100 and the warn-
ing 2000h is output:
Config.OutputPerOn = FALSE
•
Config.ActuatorEndStopOn = FALSE
•
Config.FeedbackOn = FALSE
•
If Config.OutputPerOn = FALSE and Con-
fig.ActuatorEndStopOn = TRUE or Config.FeedbackOn =
TRUE, only the warning 2000h is output.
If Config.OutputPerOn = TRUE, VirtualActuatorLimit is not
taken into consideration.
As of PID_3Step Version 2.3 the monitoring and limiting of
the travel time can be deactivated with Con-
fig.VirtualActuatorLimit = 0.0.
Scaling Input_PER high
Input_PER is converted to a percentage based on the two
value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the InputScaling structure.
Scaling Input_PER low
Input_PER is converted to a percentage based on the two
value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the InputScaling structure.
Scaled high process value
Input_PER is converted to a percentage based on the two
value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the InputScaling structure.
Scaled low process value
Input_PER is converted to a percentage based on the two
value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the InputScaling structure.
Scaling Feedback_PER high
Feedback_PER is converted to a percentage based on the
two value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the FeedbackScaling structure.
Scaling Feedback_PER low
Feedback_PER is converted to a percentage based on the
two value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the FeedbackScaling structure.
High endstop
Feedback_PER is converted to a percentage based on the
two value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the FeedbackScaling structure.
Low endstop
Feedback_PER is converted to a percentage based on the
two value pairs UpperPointOut, UpperPointIn and Lower-
PointOut, LowerPointIn of the FeedbackScaling structure.
Function Manual, 03/2017, A5E35300227-AC
PID control