Maretron DSM570, Руководство пользователя

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Revision 1.8.3 Page 233
Figure 276
– High Alert Parameters
A high alert is triggered (i.e. becomes an active alert) once an input signal has risen above the
High
Alert Set Point and the Set Delay time has elapsed. If the S et Delay is set to zero, then the alert is
immediately triggered once the input signal rises above the High Alert Set Point . The Set Delay is
used to reduce false or spurious alerts. As an example, setting the Set Delay to 5 seconds will
eliminate any temporary transitions of the input signal above the High Alert Set Point lasting less than
5 seconds from triggering an alert. Once the alert is triggered, it becomes an active alert. An alert
remains active until
•
The input signal falls below the High Alert Clear Point and the Clear Delay time has elapsed. If
the Clear Delay is set to zero, then the alert immediately transitions to the Awaiting Cancel
once the input signal falls below the High Alert Clear Point (as shown in the example above).
•
The user accepts the alert in which case it transitions into the Accepted state.
The
Clear Delay is used to reduce false or spurious alerts.
8.3.7.1.2 Trigger Configuration