Subscribing proxy points for COV data collection
The driver offers client support for BACnet COV services for devices that support COV. Receiving COV (Change-of Value) notifications
for proxy point data is more efficient than polling for data.
Prerequisites: The device(s) with the points you are subscribing support COV subscriptions.
- Under the BacnetNetwork you need to add at least one additional TuningPolicy (apart from the DefaultPolicy).
- Set its
Use Covproperty totrue. - Assign Bacnet proxy points to the CovPolicy under a COV-capable BacnetDevice.If successful, such a proxy point list in the Bacnet Point Manager Read column shows COV instead of Polled. If the COV subscription is unsuccessful, the point falls back to polling and shows Polled, like the points configured with a polling TuningPolicy.
Figure 10. Example proxy points subscribed for COV
