Siemens SIMATIC S7-1200 Function Manual page 415

Tag
PIDSelfTune.SUT.State
PIDSelfTune.SUT.ProcPar-
HeatOk
PIDSelfTune.SUT.ProcPar-
CoolOk
PID control
Function Manual, 03/2017, A5E35300227-AC
Data type Default
INT 0
BOOL FALSE
BOOL FALSE
Description
The SUT.State tag indicates the current phase of pretun-
ing:
State = 0: Initialize pretuning
•
State = 100: Calculate standard deviation for heating
•
State = 200: Calculate standard deviation for cooling
•
State = 300: Determine point of inflection for heating
•
State = 400: Determine point of inflection for cooling
•
State = 500: Set heating to setpoint after reaching
•
point of inflection
State = 600: Set cooling to setpoint after reaching point
•
of inflection
State = 700: Compare efficiency of the heating actua-
•
tor and cooling actuator
State = 800: Heating and cooling activated
•
State = 900: Cooling activated
•
State = 1000: Determine delay time after switching off
•
heating
State = 9900: Pretuning successful
•
State = 1: Pretuning not successful
•
TRUE: The calculation of the process parameters for pre-
tuning heating was successful.
This tag is set during tuning.
It must be TRUE for calculation of the PID parameters for
heating.
TRUE: The calculation of the process parameters for pre-
tuning cooling was successful.
This tag is set during tuning.
It must be TRUE for calculation of the PID parameters for
cooling.
Instructions
9.3 PID_Temp
415