Siemens SIMATIC S7-1200 Function Manual page 257

Tag
Config.InputUpperWarning
Config.InputLowerWarning
Config.OutputUpperLimit
Config.OutputLowerLimit
Config.SetpointUpperLimit
Config.SetpointLowerLimit
Config.MinimumOnTime
Config.MinimumOffTime
PID control
Function Manual, 03/2017, A5E35300227-AC
Data type Default
REAL 3.402822e+38 Warning high limit of the process value
REAL -
3.402822e+38
REAL 100.0
REAL 0.0
REAL 3.402822e+38 High limit of setpoint
REAL -
3.402822e+38
REAL 0.0
REAL 0.0
Description
If you set InputUpperWarning outside the process
value limits, the configured absolute process value
high limit is used as the warning high limit.
If you configure InputUpperWarning within the process
value limits, this value is used as the warning high
limit.
InputUpperWarning > InputLowerWarning
InputUpperWarning ≤ InputUpperLimit
Warning low limit of the process value
If you set InputLowerWarning outside the process
value limits, the configured absolute process value low
limit is used as the warning low limit.
If you configure InputLowerWarning within the process
value limits, this value is used as the warning low limit.
InputLowerWarning < InputUpperWarning
InputLowerWarning ≥ InputLowerLimit
High limit of output value
For details, see OutputLowerLimit
OutputUpperLimit > OutputLowerLimit
Low limit of output value
For Output and Output_PER, the range of values from
-100.0 to +100.0, including zero, is valid. At -100.0,
Output_PER = -27648; at +100.0, Output_PER =
27648.
For Output_PWM, the value range 0.0 to +100.0 ap-
plies.
The output value limits must match the control logic.
OutputLowerLimit < OutputUpperLimit
If you configure SetpointUpperLimit outside the pro-
cess value limits, the configured process value abso-
lute high limit is used as the setpoint high limit.
If you configure SetpointUpperLimit within the process
value limits, this value is used as the setpoint high
limit.
Low limit of the setpoint
If you set SetpointLowerLimit outside the process
value limits, the configured process value absolute low
limit is used as the setpoint low limit.
If you set SetpointLowerLimit within the process value
limits, this value is used as the setpoint low limit.
The minimum ON time of the pulse width modulation in
seconds is rounded to
MinimumOnTime = n×CycleTime.Value
The minimum OFF time of the pulse width modulation
in seconds is rounded to
MinimumOffTime = n×CycleTime.Value
Instructions
9.1 PID_Compact
257