Siemens SIMATIC S7-1200 Function Manual page 356

Instructions
9.2 PID_3Step
Tag
Config.SetpointUpperLimit
Config.SetpointLowerLimit
Config.MinimumOnTime
Config.MinimumOffTime
Config.TransitTime
Config.InputScaling.Upper-
PointIn
Config.InputScaling.Lower-
PointIn
Config.InputScaling.Upper-
PointOut
Config.InputScaling.Lower-
PointOut
Config.FeedbackScaling
.UpperPointIn
356
Data type Default Description
REAL +3.40282 High limit of setpoint
2e+38
If you set SetpointUpperLimit outside the process value limits, the
configured absolute process value high limit is preassigned as the
setpoint high limit.
If you configure SetpointUpperLimit within the process value limits,
this value is used as the setpoint high limit.
REAL - Low limit of the setpoint
3.402822
If you set SetpointLowerLimit outside the process value limits, the
e+38
configured absolute process value low limit is preassigned as the
setpoint low limit.
If you set SetpointLowerLimit within the process value limits, this
value is used as the setpoint low limit.
REAL 0.0 Minimum ON time
Minimum time in seconds for which the servo drive must be
switched on.
Config.MinimumOnTime is only effective if Output_UP and Out-
put_DN are used (Config.OutputPerOn = FALSE).
REAL 0.0 Minimum OFF time
Minimum time in seconds for which the servo drive must be
switched off.
Config.MinimumOffTime is only effective if Output_UP and Out-
put_DN are used (Config.OutputPerOn = FALSE).
REAL 30.0 Motor transition time
Time in seconds the actuating drive requires to move the valve
from the closed to the opened state.
REAL 27648.0 Scaling Input_PER high
Input_PER is converted to a percentage based on the two value
pairs UpperPointOut, UpperPointIn and LowerPointOut, Lower-
PointIn of the InputScaling structure.
REAL 0.0 Scaling Input_PER low
Input_PER is converted to a percentage based on the two value
pairs UpperPointOut, UpperPointIn and LowerPointOut, Lower-
PointIn of the InputScaling structure.
REAL 100.0 Scaled high process value
Input_PER is converted to a percentage based on the two value
pairs UpperPointOut, UpperPointIn and LowerPointOut, Lower-
PointIn of the InputScaling structure.
REAL 0.0 Scaled low process value
Input_PER is converted to a percentage based on the two value
pairs UpperPointOut, UpperPointIn and LowerPointOut, Lower-
PointIn of the InputScaling structure.
REAL 27648.0 Scaling Feedback_PER high
Feedback_PER is converted to a percentage based on the two
value pairs UpperPointOut, UpperPointIn and LowerPointOut,
LowerPointIn of the FeedbackScaling structure.
Function Manual, 03/2017, A5E35300227-AC
PID control