Siemens SIMATIC S7-1200 Function Manual page 396

Instructions
9.3 PID_Temp
Tag
SetSubstituteOutput
PhysicalUnit
PhysicalQuantity
ActivateRecoverMode
Warning
Progress
CurrentSetpoint
CancelTuningLevel
396
Data type Default
BOOL TRUE
INT 0
INT 0
BOOL TRUE
DWORD 0
REAL 0.0
REAL 0.0
REAL 10.0
Description
Selection of the output value while an error is pending
(State = 5):
If SetSubstituteOutput = TRUE and ActivateRecover-
•
Mode = TRUE, the configured substitute output value
SubstituteOutput is output as PID output value as long
as an error is pending.
If SetSubstituteOutput = FALSE and ActivateRecov-
•
erMode = TRUE, the actuator remains at the current
PID output value as long as an error is pending.
If ActivateRecoverMode = FALSE, SetSubstituteOut-
•
put is not effective.
If SubstituteOutput is invalid (ErrorBits = 0020000h),
•
the substitute output value cannot be output. In this
case, the low limit of the PID output value for heating
(Config.Output.Heat.PidLowerLimit) is used as PID
output value.
Unit of measurement of the process value and setpoint,
e.g., ºC, or ºF.
This parameter is used for display in the editors and does
not influence the control algorithm.
Physical quantity of the process value and setpoint, e.g.,
temperature.
This parameter is used for display in the editors and does
not influence the control algorithm.
The ActivateRecoverMode tag determines the reaction to
error.
The Warning tag shows the warnings since Reset = TRUE
or ErrorAck =TRUE. Warning is retentive.
Progress of current tuning phase as a percentage (0.0 -
100.0)
CurrentSetpoint always displays the currently effective
setpoint. This value is frozen during tuning.
Permissible fluctuation of setpoint during tuning. Tuning is
not canceled until:
Setpoint > CurrentSetpoint + CancelTuningLevel
•
or
Setpoint < CurrentSetpoint - CancelTuningLevel
•
Function Manual, 03/2017, A5E35300227-AC
PID control