5
System
monitoring
26
Positioner DC 6-06
5.3.2
Monitoring the PWM setpoint
If the setpoint is connected to PWM input 1, a possible error in 3009
ErrFuelSetpPWMIn1
is activated, when connected to PWM input 3 on the other hand
the error 3011
ErrFuelSetpPWMIn3
is set. As with every other error, the common alarm
3801
CommonAlarm
is simultaneously activated.
An error at the PWM setpoint generator is detected when signal 3500
FuelSetpPWMIn1
or 3504
FuelSetpPWMIn3
fails or when the frequency at 3501
FuelSetpFrequencyIn1
or
3505
FuelSetpFrequencyIn3
rises above 625 Hz or when a high-phase is measured
below the mean between 0 % and the lower reference or above the mean between the
upper reference and 100 % (
6.3.2 Error detection with the PWM inputs
The particular error is automatically reset when the signal is back within the valid range
and the reset is permitted by 4332
FuelSetpHoldOrReset
= 0.
Even if the value returns to within a valid range, the error remains continuously present
if the 'freeze' is requested with 4332
FuelSetpHoldOrReset
= 1.
5.4
Monitoring the analogue stop signal
If the measured value of the analogue stop signal 3511
AnaStop_Value
exceeds or falls
below the specified error limits 1512
AnaStop_ErrorLow
and 1513
AnaStop_ErrorHigh
(
6.2.3 Error detection with the analogue inputs
), the error 3005
ErrAnaStopRequest
and
the common alarm 3801
CommonAlarm
are activated simultaneously (
).
As with the setpoint input, you can decide in the parameterization phase how the system
will respond to such an error.
4341
AnaStopSubstOrLast
= 0
continue working with the last valid percentage
4341
AnaStopSubstOrLast
= 1
continue working with 342
AnaStopSensorSubst
4342
AnaStopHoldOrReset
= 0 when the measured value is back within the
permitted limits, reset the error and continue with
the valid value
4342
AnaStopHoldOrReset
= 1 the error remains active until the control unit is
switched off or until an error reset, whether or not
the measured value comes back to within a valid
range
It should be remembered that error handling manipulates the percentage 2900
AnaStopSensor
and that it therefore also indirectly affects 2809
AnaStopRequest -
via the
thresholds, but does not directly affect the stop request.
An error is therefore automatically reset when the signal is back within the valid range and
the reset is permitted by 4849
AnaStopHoldOrReset
= 0.
Summary of Contents for PANDAROS DC 6-06
Page 2: ......
