Figure 40 depicts the ObjectType for the PubSub connection model and its components and the relations to other parts of the model.

Figure 40 – PubSubConnectionType Overview

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.

This Method is used to add a new WriterGroup Object to an instance of the PubSubConnection.

The Client shall be authorized to modify the configuration for the PubSub functionality when invoking this Method on the Server.

Signature

AddWriterGroup (

[in]WriterGroupDataType Configuration

[out]NodeId GroupId

);

Argument	Description
Configuration	Configuration parameters for the WriterGroup. The parameters and the WriterGroupDataType are defined in 6.2.5.
GroupId	The NodeId of the new WriterGroup Object.

Method Result Codes

ResultCode	Description
Bad_InvalidArgument	The Server is not able to apply the GroupName. The name may be too long or may contain invalid character.
Bad_BrowseNameDuplicated	An Object with the name already exists in the connection.
Bad_ResourceUnavailable	The Server does not have enough resources to add the group.
Bad_UserAccessDenied	The Session user does not have rights to create the group.

This Method is used to add a new ReaderGroup Object to an instance of the PubSubConnection.

The Client shall be authorized to modify the configuration for the PubSub functionality when invoking this Method on the Server.

Signature

AddReaderGroup (

[in]ReaderGroupDataType Configuration

[out]NodeId GroupId

);

Argument	Description
Configuration	Configuration parameters for the ReaderGroup. The parameters and the ReaderGroupDataType are defined in 6.2.7.
GroupId	The NodeId of the new ReaderGroup Object.

Method Result Codes

ResultCode	Description
Bad_InvalidArgument	The Server is not able to apply the GroupName. The name may be too long or may contain invalid character.
Bad_BrowseNameDuplicated	An Object with the name already exists in the connection.
Bad_ResourceUnavailable	The Server does not have enough resources to add the group.
Bad_UserAccessDenied	The Session user does not have rights to create the group.

This Method is used to remove a PubSubGroup Object from the connection.

A successful removal of the PubSubGroup Object removes all associated DataSetWriter or DataSetReader Objects. Before the Objects are removed, their state is set to Disabled_0.

The Client shall be authorized to modify the configuration for the PubSub functionality when invoking this Method on the Server.

Signature

RemoveGroup (

[in]NodeIdGroupId

);

Argument	Description
GroupId	NodeId of the group to remove from the connection

Method Result Codes

ResultCode	Description
Bad_NodeIdUnknown	The GroupId is unknown.
Bad_UserAccessDenied	The Session user does not have rights to delete the group.

This ObjectType is the abstract base type for Objects representing transport protocol mapping specific settings for PubSubConnections. The ConnectionTransportType is formally defined in Table 113.

Table 113 – ConnectionTransportType Definition

Attribute	Value
BrowseName	ConnectionTransportType
IsAbstract	True
References	Node Class	BrowseName	DataType	TypeDefinition	Modelling Rule
Subtype of BaseObjectType