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. |