Beckhoff TwinCAT 3 Manual page 27

Name Unit
tPWMCycleTime
tPWMMinOffTime
tPWMMinOnTime
tPWMWaitingTime
fYThresholdOff
fYThresholdOn
nCyclesForSwitchO none
ver
controller
Parameters
bEnablePreControll none
er
bEnableZones none
bEnableCVFilter none
iFilterType none
iControllerType none
alarming
parameters
TempLow
TempLowLow
TempHigh
TempHighHigh
TempAbsoluteHigh
TempAbsoluteLow
for experts only
parameters
fTuneKp none
fTuneTn none
fTuneTv none
fTuneTd none
Description
ST_CTRL_ParaController
TYPE ST_CTRL_ParaController :
STRUCT
(* Controller parameter set - heating *)
KpHeat : FLOAT;
TnHeat : TIME;
TvHeat : TIME;
TdHeat : TIME;
(* Controller parameter set - cooling *)
KpCool : FLOAT;
TnCool : TIME;
TvCool : TIME;
TdCool : TIME;
END_STRUCT
END_TYPE
TC3 Temperature Controller
Range
s TIME
s TIME
s TIME
s TIME
% (L)REAL
% (L)REAL
INT
[TRUE,FALSE]
[TRUE,FALSE]
[TRUE,FALSE]
ENUM
ENUM
°C (L)REAL
°C (L)REAL
°C (L)REAL
°C (L)REAL
°C (L)REAL
°C (L)REAL
(L)REAL
(L)REAL
(L)REAL
(L)REAL
Version: 1.1
Description
Cycle time of the PWM signal.
PWM: minimal off time
PWM: minimal on time
PWM: waiting time before switching vorm heating to
cooling and vice versa
3-Step: Off threshold
3-Step: On threshold
Number of cycles in which a change of parameter set is
done (smooth switching)
Switches pre-controller on
Switches open loop characteristic on until close to set
value.
Switches on control value filter following the main
controller.
Selection of a filter type for the control value filter
following the main controller (see below)
Selection of a control algorithm (see below)
Relative lower temperature limit in the first band.
Relative lower temperature limit in the second band.
Relative upper temperature limit in the first band.
Relative upper temperature limit in the second band.
Absolute upper temperature limit.
Absolute lower temperature limit.
FineTuning parameter for PID controller
FineTuning parameter for PID controller
FineTuning parameter for PID controller
FineTuning parameter for PID controller
PLC libraries
27