PLC libraries
Name Unit Range Description
General
Parameters
iMode none INT Controller operating mode (1 = heating, 2 = cooling, 3 =
heating & cooling) (see below)
iReactionOnFailure none INT Parameterisable reaction to errors (see below)
bSelCtrlParameterS
et
none BOOL TRUE = external parameter set, FALSE = internal
parameter set (from tuning)
dwAlarmSupp none DWORD Masks out the alarms (see below)
tCtrlCycleTime s TIME Controller's sampling time. In the course of the sampling
time the controller re-calculates the control value.
tTaskCycleTime s TIME Task cycle time. The FB is called with this time interval.
tuning parameters
iTuningMode °C E_CTRL_TuneMo
de
Selects how tuning should be done (see below)
tTuneStabilisation s TIME Waiting time (stabilisation of process) until step for tuning
is switched on.
fEndTunePercentHe
ating
% (L)REAL percent of setpoint when controller stops tuning and waits
for switching to closed loop control
fYTuneCooling °C (L)REAL Control value for tuning step in cooling mode.
fYStableCooling °C (L)REAL Control value for stabilizise process before cooling tuning
starts.
fScalingFactor none (L)REAL Scaling factor: if only heating tuning was done cooling
parameters are heating parameter*scaling factor
setpoint
parameters
fWMin °C (L)REAL Minimum value of the control variable.
fWMax °C (L)REAL Maximum value of the control variable.
bEnableSoftStart none BOOL FALSE = no soft start, TRUE = soft start
bEnableRamping none BOOL FALSE = no ramping, TRUE = ramping
fWStartUp °C (L)REAL Setpoint while soft start phase
tStartUp s TIME Waiting time in soft start phase
bStartUpRamping none [TRUE,FALSE] Enables ramping in soft start phase
fWStartUpVeloPos °C/s (L)REAL Rate of rise (of ramp) during the start-up phase.
fWStartUpVeloNeg °C/s (L)REAL Rate of fall (of ramp) during the start-up phase.
fWVeloPos °C/s (L)REAL Rate of rise (of ramp).
fWVeloNeg °C/s (L)REAL Rate of fall (of ramp).
actual value
parameters
tFilter s TIME Time constant of the actual value filter (first order P-T1
filter)
bFilter none [TRUE,FALSE] The actual value filter is actuated if TRUE.
deadband
parameters
bDeadband none [TRUE,FALSE] TRUE = Deadband on, FALSE = Deadband off
fEDeadband °C (L)REAL Size of deadband in °C
control value
parameters
fYMin none (L)REAL Minimum value of the control variable.
fYMax none (L)REAL Maximum value of the control variable.
fYManual none (L)REAL Control value in manual operation.
fYOnFailure none (L)REAL Control value in case of error (parameterisable).
TC3 Temperature Controller26 Version: 1.1
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