According to the BACnet protocol documentation:

Provides a network-visible indication of those COV-multiple subscriptions that are active at any given time. Each list entry constitutes a COV-multiple context and consists of a Recipient, an Issue Confirmed Notifications flag, a Time Remaining value, a Maximum Notification Delay timeout, and a list of monitored objects. For each monitored object, a list of COV Specifications is present with each containing a Monitored Property reference, an optional COV Increment, and a Timestamped flag. Only one COV-multiple context shall be present in this property for a given Recipient and form of notification indicated by the Issue Confirmed Notifications flag. A Recipient is identified by the BACnet address of the COV-client and the Subscriber Process Identifier.

Property activeCovMultipleSubscriptions of object device can be read and written using a single IOTag.

Text Parameters

Numeric Parameters

Tag Value

A character string containing an XML with a value of type <SequenceOfBACnetCOVMultipleSubscription>.