Siemens SIMATIC S7-1200 Function Manual page 414

Instructions
9.3 PID_Temp
Tag
PIDSelfTune.SUT.TuneRule-
Heat
PIDSelfTune.SUT.TuneRule-
Cool
414
Data type Default
INT 2
INT 2
Description
Method for PID parameter calculation with pretuning for
heating
Options are:
SUT.TuneRuleHeat = 0: PID according to CHR
•
SUT.TuneRuleHeat = 1: PI according to CHR
•
SUT.TuneRuleHeat = 2: PID for temperature process-
•
es according to CHR (results in a slower and rather
asymptomatic control response with lower overshoot
than SUT.TuneRuleHeat = 0)
(CHR = Chien, Hrones and Reswick)
Only with SUT.TuneRuleHeat = 2 is the control zone Re-
tain.CtrlParams.Heat.ControlZone automatically set during
pretuning for heating.
Method for PID parameter calculation with pretuning for
cooling
Options are:
SUT.TuneRuleCool = 0: PID according to CHR
•
SUT.TuneRuleCool = 1: PI according to CHR
•
SUT.TuneRuleCool = 2: PID for temperature process-
•
es according to CHR (results in a slower and rather
asymptomatic control response with lower overshoot
than SUT.TuneRuleCool = 0)
(CHR = Chien, Hrones and Reswick)
Only with SUT.TuneRuleCool = 2 is the control zone Re-
tain.CtrlParams.Cool.ControlZone automatically set during
pretuning for cooling.
SUT.TuneRuleCool is only effective if the cooling output
and PID parameter switching are activated (Config
.ActivateCooling = TRUE, Config.AdvancedCooling =
TRUE).
Function Manual, 03/2017, A5E35300227-AC
PID control