Adding a slot to poll for more data
In addition to editing a proxy point’s facets to poll additional properties, you can add a slot to the point’s ProxyExt, and
direct it to a specific property—even a property of a different object or device. This technique is based on a Bacnet Device
Object Property Reference (DOPR) format, where numerical codes are required for processing.
Prerequisites: The computer is connected to a remote controller station using
- Expand followed by expanding the point.
- Right-click the point’s Proxy Ext and click .The Slot Sheet view opens.
- Right-click an empty area of the Slot Sheet and click the Add Slot.The Add Slot window opens.
- Select
bacnetform the first, andBacnetDeviceObjectPropertyReferencefrom the second Type drop-down list and click OK. - To open the ProxyExt’s Property Sheet, double-click the ProxyExt in the Nav tree.The Property Sheet opens.
- Expand the new slot and edit its DOPR properties to poll and display the needed property.
Due to the complexity of this procedure, it is expected to be infrequently used. However, in certain applications, such as
with Event Enrollment objects (a BACnet object that monitors other objects for the purpose of generating alarms based on its
own algorithm), it may prove useful.
The resulting metadata are included with the name of the DOPR. If it is an Event Enrollment object, and the DOPR property is Event_State (the alarm state of the Event Enrollment object), the facet appears as follows:
<EEinstanceNumber>=<EE event state>
if another property, the facet is:
<EEinstanceNumber>_<EEpropId>=<prop value>