Aggregated alarm state information
- Last UpdatedDec 12, 2025
- 2 minute read
Runtime clients and applications, such as Object Viewer, AVEVA OMI ViewApps, and InTouch HMI applications, can show alarm aggregation statuses.
You can use animations such as the alarm border animation with Situational Awareness Library graphics or with Industrial Graphics in both Managed InTouch applications and AVEVA OMI ViewApps, and you can add alarm aggregation displays to navigation items in AVEVA OMI ViewApps
Alarm aggregation functionality can be described for an object, for an area, and for an attribute.
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Object |
Aggregation represents all alarms on the object, on all contained objects, and on their descendents down to the lowest level of the model view. Alarm aggregation values on child objects are added to the values of the parent object or objects. All objects have this alarm aggregation functionality. |
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Area |
Aggregation represents the alarms on the Area object itself, on all objects assigned to the area, and on all sub-Areas, down to the lowest level of the model view. If the Area’s AlarmMode is silenced, all alarms on all Objects in that Area will be silenced. For more information about setting alarm modes, see the following topics: |
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Attribute |
Aggregation represents all the alarms on the attribute itself. This is the lowest level of aggregation. |
Alarms are aggregated if they are in one of three states:
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UNACK_ALM
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ACK_ALM
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UNACK_RTN
Alarms in the ACK_RTN state are not aggregated.
Alarms in silenced mode are aggregated, even though they do not appear in a runtime client.
A set of five attributes provide runtime aggregated alarm status information:
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AlarmMostUrgentSeverity |
Displays an integer from 1 to 5 that corresponds to the ortant current alarms on an object and its descendents.The integer that is displayed corresponds to the highest severity active alarm (1 is most severe). If no alarms are in the InAlarm state or waiting to be acknowledged, the value is 0. |
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AlarmMostUrgentMode |
Displays the mode (enabled or silenced) of the most important current alarm. Alarms in disabled mode are not aggregated. |
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AlarmMostUrgentInAlarm |
Displays the InAlarm status (true or false) of the most important current alarm. |
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AlarmMostUrgentAcked |
Displays the acknowledgement status (true or false) of the most important current alarm. |
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AlarmCntsBySeverity |
In AVEVA OMI and InTouch HMI runtime client applications, this attribute is used to show the number of alarms by status and severity. In the Object Viewer, this attribute displays an array that shows:
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