Siemens SIMATIC S7-1200 Function Manual page 421

Tag
PIDSelfTune.TIR.State
PIDSelfTune.TIR.ProcPar-
HeatOk
PIDSelfTune.TIR.ProcPar-
CoolOk
PID control
Function Manual, 03/2017, A5E35300227-AC
Data type Default
INT 0
BOOL FALSE
BOOL FALSE
Description
The TIR.State tag indicates the current phase of "fine
tuning":
State = 0: Initialize fine tuning
•
State = 100: Calculate standard deviation for heating
•
State = 200: Calculate standard deviation for cooling
•
State = 300: Attempting to reach setpoint for heating
•
with two-step control using heating
State = 400: Attempting to reach setpoint for cooling
•
with two-step control using cooling
State = 500: Attempting to reach setpoint for heating
•
with PID control
State = 600: Attempting to reach setpoint for cooling
•
with PID control
State = 700: Calculate standard deviation for heating
•
State = 800: Calculate standard deviation for cooling
•
State = 900: Determine oscillation and calculate pa-
•
rameters for heating
State = 1000: Determine oscillation and calculate pa-
•
rameters for cooling
State = 9900: Fine tuning successful
•
State = 1: Fine tuning not successful
•
TRUE: The calculation of the process parameters for fine
tuning heating was successful.
This tag is set during tuning.
It must be met for calculation of the PID parameters for
heating.
TRUE: The calculation of the process parameters for fine
tuning cooling was successful.
This tag is set during tuning.
It must be met for calculation of the PID parameters for
cooling.
Instructions
9.3 PID_Temp
421