Here's the explanation
1 Trigger pending. The condition has been met but not for the trigger delay period. This is the status of an alert with an active delay timer.
2 Triggered. This is an alert condition that was triggered and also exceeded the delay timer, or a triggered alert condition with no delay timer set.
3 Reset pending. The reset condition has been met and a reset timer is active.
4 Reset. The condition has met the criteria for reset condition and reset delay.