Prerequisites and restrictions to receive BACnet alarms

The following prerequisites and restrictions apply on receiving BACnet alarms:

To be received, a BACnet alarm must be generated from a BACnet device represented in the station. Otherwise, the alarm is discarded.
- Ideally, the alarming BACnet object should be represented by a Bacnet proxy point, in which case the Niagara alarm record source provides the Niagara proxy point name and ord.
- If the alarming BACnet object is not proxied in the station, the Niagara alarm record shows the source as the Alarms device extension (ord) of the corresponding BacnetDevice.
In either case, alarm data details provide the source Object Id, for example “analogInput 3”, current “toState” and “statusFlags”, as well as any alarm message text.
AlarmClass components in the station’s AlarmService receive BACnet alarms. Each device uses only one AlarmClass, as referenced in each BacnetDevice’s Alarms device extension. You can specify the same one (e.g. the DefaultAlarmClass), or create and use separate AlarmClasses, as needed.
In the Notification Class object used by the sending BACnet device, any receiving station must be added in the “Recipient_List” property, using its numerical device ID (Local Device, Object Id). You can do this using the BACnet device’s native configuration tool, or if the device supports this, directly from Niagara using corresponding “Config” components for objects in that device.