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This ObjectType is a concrete type for Objects representing PubSubConnections. A PubSubConnection is a combination of protocol selection, protocol settings and addressing information. The PubSubConnectionType is formally defined in Table 112.

Table 112 – PubSubConnectionType Definition

Attribute	Value
BrowseName	PubSubConnectionType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Modelling Rule
Subtype of BaseObjectType defined in OPC 10000-5.
HasProperty	Variable	PublisherId	BaseDataType	PropertyType	Mandatory
HasComponent	Variable	TransportProfileUri	String	SelectionListType	Mandatory
HasProperty	Variable	ConnectionProperties	KeyValuePair[]	PropertyType	Mandatory
HasComponent	Object	Address		NetworkAddressType	Mandatory
HasComponent	Object	TransportSettings		ConnectionTransportType	Optional
HasWriterGroup	Object	<WriterGroupName>		WriterGroupType	OptionalPlaceholder
HasReaderGroup	Object	<ReaderGroupName>		ReaderGroupType	OptionalPlaceholder
HasComponent	Object	Status		PubSubStatusType	Mandatory
HasComponent	Object	Diagnostics		PubSubDiagnostics‌ConnectionType	Optional
HasComponent	Method	AddWriterGroup	Defined in 9.1.5.3.		Optional
HasComponent	Method	AddReaderGroup	Defined in 9.1.5.4.		Optional
HasComponent	Method	RemoveGroup	Defined in 9.1.5.5.		Optional

The PublisherId is defined in 6.2.6.1.

The TransportProfileUri is defined in 6.2.6.2. The Property is initialized with the default transport protocol for the Address during the creation of the connection. The SelectionValues Property of the SelectionListType shall contain the list of supported TransportProfileUris. The SelectionListType is defined in OPC 10000-5.

The ConnectionProperties is defined in 6.2.6.4.

The Address is defined in 6.2.6.3. The abstract NetworkAddressType is defined in A.3.1. The default type used for concrete instances is the NetworkAddressUrlType defined in A.3.2. It represents the Address in the form of a URL String.

The transport protocol mapping specific setting settings are provided in the optional Object TransportSettings. The ConnectionTransportType is defined in 9.1.5.6. The Object shall be present if the transport protocol mapping defines specific parameters.

The configured WriterGroup and ReaderGroup Objects are added as components to the instance of the PubSubConnectionType. PubSubGroup Objects may be configured with product specific configuration tools or added and removed through the OPC UA Methods AddWriterGroup, AddReaderGroup and RemoveGroup.

The Status Object provides the current operational status of the connection. The PubSubStatusType is defined in 9.1.10. The state machine for the status and the relation to other PubSub Objects like PublishSubscribe, PubSubGroup, DataSetWriter and DataSetReader are defined in 6.2.1.

The Diagnostics Object provides the current diagnostic information for a PubSubConnectionType Object. The PubSubDiagnosticsConnectionType is defined in 9.1.11.8.