Beckhoff TwinCAT 3 Manual page 18

Configuration
• Perform the required external connection.
Name
eCtrlMode Connection necessary Switches controller to different operating modes (active,
bSelSetpoint Connection optional
fW1 Connection necessary Set value.
fW2 Connection optional
fX Connection necessary Actual value. This value must be converted to LREAL.
fYManual Connection optional
bOpenThermoc Connection optional
ouple
bReverseTherm Connection optional
ocouple
bBackVoltage Connection optional
bLeakage Connection optional
bShortCircuit Connection optional
bOpenCircuit Connection optional
sControllerPara Connection necessary General parameters (sampling rate etc.) are passed to the
meter
sParaController Connection optional
External
• Perform the necessary parameterisation of the controller via the structure.
The parameters can be specified through initial values, or by assignment. If initial values are used, then the
instance of the structure with initial values looks like this:
(* parameters *)
sControllerParameter : ST_CTRL_TempCtrlParameter :=
(
(* base *)
tCtrlCycleTime := t#1000ms,
tTaskCycleTime := t#10ms,
fYMin := -100,
fYMax := 100,
tPWMCycleTime := t#100ms ,
fYManual := 20,
bFilter := FALSE,
tFilter := t#100ms,
bDeadband := FALSE,
fEDeadband := 1.0, (* deadband *)
fWMin := 15,
fWMax := 60,
fWStartUp := 20.0,
tStartUp := t#160s,
fWVeloPos := 0.01,
fWVeloNeg := 0.01,
bStartUpRamping := FALSE,
fWStartUpVeloPos := 0.1,
fWStartUpVeloNeg := 0.1,
iMode := eCTRL_ControlMode_HEATING,
dwAlarmSupp := 16#FF_FF_FF_FF,
18
Beschreibung
passive, tuning)
Selects one of two possible set values. FALSE selects the
normal set value, while TRUE selects the standby set value.
Standby set value, generally smaller than fW1. fSelSetpoint
can be used to switch between fW1 and fW2.
Control value in manual mode.
The thermocouple is open if TRUE. Must be indicated by
the hardware (e.g. KLxxxx).
TRUE indicates that the thermocouple has been connected
with the wrong polarity. Must be indicated by the hardware.
TRUE indicates that the input voltage at the thermocouple
is too high. Must be indicated by the hardware.
TRUE indicates that leakage current has been detected at
the heating element. Must be indicated by the hardware.
TRUE indicates that a short circuit has been detected at the
heating element. Must be indicated by the hardware.
TRUE indicates that an open circuit has been detected at
the heating element. Must be indicated by the hardware.
block in this structure.
An external controller parameter set is passed to the block
in this structure.
Version: 1.1 TC3 Temperature Controller