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Manual 26659
ProAct P-Series FL Position Controller
Woodward
33
Temperature > 120 ºC
If the on-board temperature sensor reads above 120 °C this diagnostic will be
set. Operation above this temperature is not recommended and may exceed the
temperature rating of the internal electronic components. This diagnostic, when
used, provides an indication of this event occurrence.
Failure levels: >120 °C
Persistence: 100 ms
Configuration options: Off, Alarm, Shutdown
Position Error
Position Error detection logic will indicate a difference between actual position
and demanded position was detected. The magnitude and duration values are
customer-configurable parameters (see Configuration, Position tab). This
indication goes true when the low-pass error delay filter on the ‘expected position
minus actual position’ is greater than the Error Maximum threshold setting. The
filter time constant is set by the Error Delay setting. The ‘expected position’ is
internally determined as the demanded position filtered by the expected
dynamics.
Failure levels: Set by customer variable, Error > |Position Error Maximum|
Persistence: Time constant set by customer variable, Position Error Delay.
Configuration options: Off, Alarm, Shutdown
Loss of All Position Demands
The configured position demand(s) are determined to be out of range or failed.
When redundant inputs are configured, it indicates that both inputs are failed.
Configuration options: Off, Alarm, Shutdown
PWM Demand Failed
The PWM input went above the PWM input diagnostic maximum threshold or
below the PWM input diagnostic minimum threshold. PWM Demand Failed is
only active when the position demand is configured for 'PWM'.
Failure levels: >97 % Duty for and < 3 % Duty, set by customer variable
Persistence: 200 ms when not configured for redundant demands
Persistence: 10 ms when configured for redundant demands
Configuration options: Off, Alarm, Shutdown
Analog Demand Failed
The analog input went above the analog input diagnostic maximum threshold or
below the analog input diagnostic minimum threshold. Analog Demand Failed is
only active when the position demand is configured for ‘Analog'.