Fault Status
Failure Acknowledgement Unit.
Description
The Fault Status block is designed to determine the status of a fault to exclude its false detection, which may be caused by noise, false alarms, data outliers, etc. Failure can be confirmed and unconfirmed. The process of confirming a failure is based on analysing the duration of the signal of the failure indicator: if the signal took the value true, the failure situation is fixed. If the signal duration is longer than the set time (time of failure confirmation), it is considered that the fact of failure is established; if during the time of failure confirmation the signal takes the value false, it is considered that the failure is not confirmed. When the failure is cleared, several variants of block behaviour are possible depending on the method of failure handling defined by the Mode parameter.
Parameters
Mode - mode of failure handling
Instant recovery (by default) | Recovery confirmation | Permanent lock | Permanent lock
Failure handling methods:
-
Instant recovery- instant recovery after confirmation of no failure, failure confirmation time is determined by the Confirmation time parameter. -
Recovery confirmation- recovery after a specified time during which no new failures will be recorded; the recovery time is determined by the Recovery time parameter. -
Permanent lock- when the failure is confirmed, the failure cannot be cancelled.
Confirmation time - failure confirmation period
1.0 (By default) | scalar
Refusal confirmation period, s.
Recovery time - failure recovery period
0.5 (by default) | scalar.
Failure recovery period, s. Delay after failure recovery.
Dependencies
This parameter is available only when Recovery confirmation is selected in the Mode parameter.