This OPC UA Property, of DataType BACnetDeviceObjectPropertyReference , represents the BACnet property Log_DeviceObjectProperty. The BACnetDeviceObjectPropertyReference DataType is defined in 10.5.9.
The Log_DeviceObjectProperty array houses the set of properties that will be monitored and subsequently logged. When an element of the array has an object or device instance number equal to 4194303, this indicates that the element is uninitialized. For uninitialized elements, an indication that no property was specified shall be written to the corresponding entry in each log record.