Siemens S7-1200 System Manual page 429

Table 9- 17 Data types for the parameters
Parameter and type
Setpoint IN
Input IN
Input_PER IN
Actuator_H IN
Actuator_L IN
Feedback IN
Feedback_PER IN
Disturbance IN
ManualEnable IN
ManualValue IN
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
Data type Description
Real Setpoint of the PID controller in automatic mode. (Default value: 0.0)
Real A tag of the user program is used as the source of the process value.
(Default value: 0.0)
If you are using the Input parameter, you must set
Config.InputPerOn = FALSE.
Word An Analog input is used as the source of the process value. (Default
value: W#16#0)
If you are using the Input_PER parameter, you must set
Config.InputPerOn = TRUE.
Bool Digital position feedback of the valve for the high end stop
If Actuator_H = TRUE, the valve is at the high end stop and is no longer
moved in this direction. (Default value: FALSE)
Bool Digital position feedback of the valve for the low end stop
If Actuator_L = TRUE, the valve is at the low end stop and is no longer
moved in this direction. (Default value: FALSE)
Real Position feedback of the valve. (Default value: 0.0)
If you are using the Feedback parameter, you must set
Config.FeedbackPerOn = FALSE.
Int Analog feedback of the valve position. (Default value: W#16#0)
If you are using the Feedback_PER parameter, you must set
Config.FeedbackPerOn = TRUE. Feedback_PER is scaled, based upon
the following tags:
Config.FeedbackScaling.LowerPointIn
•
Config.FeedbackScaling.UpperPointIn
•
Config.FeedbackScaling.LowerPointOut
•
Config.FeedbackScaling.UpperPointOut
•
Real Disturbance variable or pre-control value
Bool Enables or disables the manual operation mode. (Default value:
FALSE):
A FALSE to TRUE edge activates "manual mode", while State = 4,
•
Mode remains unchanged.
As long as ManualEnable = TRUE, you cannot change the
operating mode using a rising edge at ModeActivate or use the
commissioning dialog.
A TRUE to FALSE edge activates the operating mode that is
•
assigned by Mode.
Note: We recommend that you change the operating mode using
ModeActivate only.
Real Process value for manual operation. (Default value: 0.0)
In manual mode, you specify the absolute position of the valve.
ManualValue is evaluated only if you are using OutputPer, or if position
feedback is available.
Technology instructions
9.2 PID control
429