This OPC UA ObjectType defines the super type for all OPC UA ObjectTypes that represent BACnet MultiState object types in an OPC UA Address Space.

Figure 21 shows an overview for the BACnetMultiStateType with its Properties and related ObjectTypes. It is formally defined in Table 24.

Figure 21 – BACnetMultiStateType overview

The BACnetMultiStateType ObjectType is formally defined in Table 24.

Table 24 – BACnetMultiStateType Definition

Attribute		Value
BrowseName		BACnetMultiStateType
IsAbstract		True
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the BACnetObjectType defined in 7.1.
0:HasComponent	Variable		Present_Value	0:UInteger	MultiStateDiscreteType	M
0:HasProperty	Variable		Out_Of_Service	0:Boolean	0:PropertyType	M
0:HasProperty	Variable		Status_Flags	BACnetStatusFlags	0:PropertyType	M
0:HasComponent	Object		EventReporting		BACnetEventReportingType	O
0:HasComponent	Object		FaultEvaluation		BACnetFaultEvaluationType	O

The BACnetMultiStateType ObjectType is an abstract type and cannot be used directly.

This OPC UA Property, of DataType 0:UInteger, reflects the logical state of the input.

This OPC UA MultiStateDiscreteType Variable represents the BACnet properties Present_Value, State_Text and Number_Of_States. The OPC UA VariableType MultiStateDiscreteType is defined in OPC 10000-8. It defines the OPC UA Property EnumStrings.

The following list provides the BACnet property and the mapping to the corresponding data member in the OPC UA multistate discrete item.

• Present_Value represented by Value Attribute of the Variable.
• State_Text and Number_Of_States represented by the EnumStrings Property of the Variable. If the optional BACnet property State_Text is not present, the EnumStrings property is filled with State_1 to State_N strings where the N and the number of strings are defined by Number_Of_States.

This OPC UA Property, of DataType 0:Boolean, represents the BACnet property Out_Of_Service.

It is an indication of whether or not the physical input that the object represents is not in service. While the Out_Of_Service property is True, the Present_Value and Reliability properties may be changed to any value as a means of simulation and/or testing.

This OPC UA Property, of DataType BACnetStatusFlags, represents the BACnet property Status_Flags. The BACnetStatusFlags DataType is defined in 10.3.7.

It represents four 0:Boolean flags that represent the general health of a BACnetMultiStateType. The flags are IN_ALARM, FAULT, OVERRIDDEN, and OUT_OF_SERVICE.

The EventReporting Object contains status and configuration information for the event reporting of BACnetMultiStateType Objects. The BACnetEventReportingType is defined in 0. The Object is optional and is not present if event generation is not activated for the BACnet object.

The FaultEvaluation Object contains status and configuration information for the fault evaluation of the BACnetMultiStateType. The BACnetFaultEvaluationType is defined in 8.23. The Object is optional and is not present if fault evaluation is not activated for the BACnet object.