Maretron DSM570, Руководство пользователя

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Revision 1.8.3 Page 235
Figure 278
– Low Alert Parameters
A low alert is triggered (i.e. becomes an active alert) once an input signal has dropped below the
Low
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 drops below the Low 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 Low 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 rises above the Low Alert Clear Point and the Clear Delay time has elapsed. If
the Clear Delay is set to zero, then the alert immediately becomes inactive once the input
signal falls below the Low Alert Clear Point . The Clear Delay is used to reduce false or
spurious alerts.
•
The user accepts the alert (as shown in the example above).
8.3.7.2.2 Trigger Configuration