This OPC UA ObjectType represents the BACnet change of bitstring event algorithm.

The BACnetChangeOfBitStringAlgorithmType is formally defined in Table 60.

Table 60 – BACnetChangeOfBitStringAlgorithmType Definition

Attribute		Value
BrowseName		BACnetChangeOfBitStringAlgorithmType
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the BACnetEventAlgorithmType defined in 8.9.
0:HasProperty	Variable		AlarmValues	0:OptionSet	0:PropertyType	M

The BACnetChangeOfBitStringAlgorithmType ObjectType is a concrete type and can be used directly.

This OPC UA Property, of DataType OptionSet, is the AlarmValues parameter for the object’s event algorithm.

The AlarmValues value represents a set of values that are considred off-NORMAL.

The OptionSet DataType contains the bitmask that defines the bits of the monitored value that are significant for comparison with the values in the AlarmValues set. The value is bitwise AND’ed with the monitored value before comparison with the AlarmValues values.