Beckhoff TwinCAT 3 Manual page 24

PLC libraries
(* controller settings *)
bEnablePreController : BOOL;
bEnableZones : BOOL;
bEnableCVFilter : BOOL;
iFilterType : E_CTRL_FilterType;
iControllerType : E_CTRL_ControllerType;
(* min max temperatures *)
TempLow : LREAL;
TempLowLow : LREAL;
TempHigh : LREAL;
TempHighHigh : LREAL;
TempAbsoluteHigh : LREAL;
TempAbsoluteLow : LREAL;
(* internal tuning parameters *)
fTuneKp : LREAL := 1.2;
fTuneTn : LREAL := 2.0;
fTuneTv : LREAL := 0.42;
fTuneTd : LREAL := 0.25;
END_STRUCT
END_TYPE
24 Version: 1.1 TC3 Temperature Controller