Maretron Alarm Module ALM100 Manual do Utilizador descarregar pdf (Página 261)

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.

Set Delay – If a valid value for the parameter being monitored is continually not

received or has an invalid value for the amount of time specified in this field, the

alert will become active.

Clear Delay – The parameter being monitored must continually be received with

a valid value for longer than the time in this field in order for the alert to become

inactive.

10.3.6.4.4 On 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 On 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 false (i.e., binary 0), 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 On for the Set Delay before the alert becomes active, and must

remain Off for the Clear Delay before the alert becomes inactive.

10.3.6.4.4.1 Trigger Configuration

Figure 91 – Trigger Configuration – On 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

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