Movicon.NExT Help on Line - Rel. 3.4.265
A "Level" alarm type has four intervention thresholds. In this case, the thresholds can be exclusive or not. This type of alarm intervenes only when the Tag value exceeds the set threshold value. For example if the four alarm thresholds are set with the following values:
High High Level = 10
High Level = 5
Low Level = -5
Low Low Level = -10
The alarm goes off with the "High Level" intervention threshold when the variable value becomes higher than 5. The alarm will go off (activates) with the "Low Level" intervention when the variable value becomes less than -5.
When the alarm is defined as "Exclusive Level" type, each intervention threshold will be exclusive. Therefore when for example the "High High" threshold activates, the "High" threshold deactivates. When the alarm is defined as "NonExlusive Level" type, the intervention thresholds will not be exclusive. Therefore for example, when the "High High" threshold activates so will the "High" threshold. In Runtime alarm discrimination based on its activation status, which is also visible in the "Alarm Window", despite whether it is exclusive or not. When an alarm is Exclusive type its activation Status will be recorded with the following text:
HighHigh|...
High|...
Low|...
LowLow|...
when an alarm is a Non Exclusive type, its activation Status will be recorded with the following text:
HighHighActive|...
HighActive|...
LowActive|...
LowLowActive|...
For further information see paragraph on "Alarm Prototype Settings".