The following properties apply to the Alarms device extension under a NiagaraStation or BacnetDevice:
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Alarm Class
Under a BacnetDevice, or using the first Alarm Class property option (Replace) under a NiagaraStation, provides a selection list of a local AlarmClasses, from which you can select one to use for all alarms received from this device.
Included is a “Use Existing” checkbox option, where:
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Alarms from this remote station are routed to any “matching” AlarmClass, that is, one with identical name as the “alarmClass” field in each alarm record. If no local “matching” AlarmClass is found, the station's default AlarmClass is used.
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If the checkbox is cleared, all received alarms are routed to the single local AlarmClass specified.
Two additional Alarm Class property options are available for the Alarm Class property of the NiagaraStation Alarms extension:
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Prepend — To add leading text (as specified) to the incoming “alarmClass” field string, then route to any local “matching” Alarm Class in the station.
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Append — To add trailing text (as specified) to the incoming “alarmClass” field string, then route to any local “matching” Alarm Class in the station.
For more details, see Prepend and Append alarm routing notes.
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Last Received Time
Timestamp when last alarm from this device was received. This is configured remotely, either in the sending Niagara station or the BACnet device.
Remaining properties apply to the Alarms extension under a NiagaraStation component only (are not available in Alarms extension
under a BacnetDevice).
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Source Name
Available in the Alarms extension of a NiagaraStation, so that the name of the sending station can be added to the received alarm’s “alarm source” name, or another format be selected. This affects the alarm’s display (versus routing).
The available choices are:
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Prepend — (default) To add leading text (as specified) to the incoming “alarmSource” field string, where the default format is
%parent.parent.displayName%:For example, an alarm in the remote station named “EastWing” for an alarm record with its local alarm source of “Room101”, the resulting alarm source would look like
EastWing:Room101 -
Append — To add trailing text (as specified) to the incoming “alarmSource” field string. For example, if the format entered is
-%parent.parent.displayName%And the alarm in the remote station named “EastWing” is for an alarm record with its (local) alarm source of “Room101”, the resulting alarm source would be
Room101-EastWing -
Use Existing — Only uses the incoming “alarmSource” field string (ignores whatever format text is entered in this property).
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Replace — Only uses the format text entered in this property as alarm source (ignoring whatever incoming “alarmSource” string is received).
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Last Send Time
Timestamp when last local alarm was routed to this device. This is configured under the local station’s AlarmService with a corresponding StationRecipient or BacnetDestination component linked to one or more AlarmClass components).
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Last Send Failure Time
Timestamp when last local alarm routed to this station could not be sent.
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Last Send Failure Cause
Text string describing failure cause routing local alarm to this station.