Maretron DSM570, Руководство пользователя

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DSM570
User’s Manual
Page 238 Revision 1.8.3
8.3.7.4.1 Trigger Configuration
Figure 281
– Trigger Configuration – On Alert
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.
Alert Set Delay
– The condition for the parameter being monitored must be in its error condition
for at least the set delay time before the alert will become active. An interesting use of the set
delay when monitoring a bilge pump (for example) is to set the Set Delay to a large value (say
20 minutes). Now, if the bilge pump runs for more than 20 minutes at a time the alert will be
triggered.
Alert Clear Delay
– The condition for the parameter being monitored must be not in its error
condition for at least the clear delay time before the alert will become cleared.
8.3.7.5 Trigger Type is Off Alert
As opposed to high and low alerts that are associated with analog input signals (i.e., many different
possible input values), there are also switch alerts that are associated with a binary input value
(sometimes called on or off, yes or no, enabled or disabled, set or reset, active or inactive). The
switch alert is similar to the high and low alert except that there are no set or reset points. The mere
fact that the switch is seen as Off causes the alert to become an active alert (assuming the Set Delay
is set to zero). Likewise, if the switch being monitored is seen as On, then the alert becomes inactive
(assuming the Clear Delay is set to zero). If the delays are not programmed to zero, then the switch
must remain Off for the Set Delay before the alert becomes active and must remain On for the Clear
Delay before the alert becomes inactive.