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Alarm Query Types

Three query types are provided by the Excel Add-In. These types are described in the following table.

Query Type	Description
Alarms	In Historian, an alarm's entire life cycle is stored as a single record in the alarm archive. Thus, when retrieving from the archive, the entire life cycle of an alarm will be returned in a single record.
Alarm History	If the Alarm History query type is chosen, each change in the alarm's state will be returned in a single record.
Events	One row per event is returned to the Excel spreadsheet.