Maretron Alarm Module ALM100 Manuel d'utilisateur télécharger pdf (Page 259)

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 signals 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).

10.3.6.4.2.2 Trigger Configuration

Figure 89 - Trigger Configuration – Low Alert

Accept Re-trigger Period – When you accept an alert, it will change to the

“Accepted” state, and annunciators that are sounding for that alert will stop

sounding. If the condition which caused the alert remains true after the amount of

time in this field, the alert will return to the “Active” state, and annunciators will

begin sounding again for that alert.

If a value of 0:00 is entered, then the alert will never re-trigger.

Low Alert Set Point – If the value of the parameter being monitored falls below

the value in this field, the alert will become active.

Set Delay – The parameter being monitored must fall below the Low Alert Set

Point value for longer than the time in this field in order for an alert to become

active. This can be used to prevent false alerts caused by parameter values that

briefly have a value that would cause an alert but quickly return to the normal

value range. The value is entered as minutes:seconds. If only one number is

entered, it will be interpreted as seconds.

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Maretron Alarm Module ALM100 Manuel d'utilisateur Page 259