Siemens SIMATIC S7-1200 Function Manual page 420

Instructions
9.3 PID_Temp
Tag
PIDSelfTune.TIR.TuneRule-
Cool
420
Data type Default
INT 0
Description
Method for parameter calculation during fine tuning for
cooling
Options are:
TIR.TuneRuleCool = 0: PID automatic
•
TIR.TuneRuleCool = 1: PID fast (faster control re-
•
sponse with higher amplitudes of the output value than
with TIR.TuneRuleCool = 2)
TIR.TuneRuleCool = 2: PID slow (slower control re-
•
sponse with lower amplitudes of the output value than
with TIR.TuneRuleCool = 1)
TIR.TuneRuleCool = 3: ZN PID
•
TIR.TuneRuleCool = 4: ZN PI
•
TIR.TuneRuleCool = 5: ZN P
•
(ZN=Ziegler-Nichols)
To be able to repeat the calculation of the PID parameters
for cooling with TIR.CalculateParamsCool and
TIR.TuneRuleCool = 0, 1 or 2, the previous fine tuning
also has to have been executed with TIR.TuneRuleCool =
0, 1 or 2. If this is not the case, TIR.TuneRuleCool = 3 is
used.
The recalculation of the PID parameters for cooling with
TIR.CalculateParamsCool and TIR.TuneRuleCool = 3, 4
or 5 is always possible.
Only effective if the cooling output and PID parameter
switching are activated (ConfigActivateCooling = TRUE
and Config.AdvancedCooling = TRUE).
Function Manual, 03/2017, A5E35300227-AC
PID control