Alarm?

[drillsar]

Is there a way to only send Alarm once or twice for certain events?

[Krazie4Acans]

Only if you clear the event. As long as the event stays true then it will send an alarm. You could do some creative programming using virtual outlet latches to make the event only stay true long enough to get the alert and then reset back to false but that would be the only way.

[zombie]

You don't need latches but you do need a virtual outlet set up like this. Example is an optical closes.

HighH2O
Set OFF
If ATOhigh CLOSED Then ON
If Output HighH2Ostop = ON Then OFF
Defer 000:10 Then ON

HighH2Ostop
Set OFF
If ATOhigh CLOSED Then ON
Defer 001:00 Then OFF

This will send two messages. Once when water level has been high for 10 seconds then a set OFF 50 seconds later, then it will not send an alert again until the sensor has opened and then CLOSED again.

You might be an engineer if...You have no life and can prove it mathematically.

[Krazie4Acans]

If you use the solution the zombie proposed don't forget to add:

If Output HighH2O = ON Then ON

Into your email alarm outlet and remove the alert for ATOhigh that is sending the alerts now. I realize that these are not the names you may be using but I wanted to stay true to the example being posted.