AVEVA Enterprise SCADA PubSub API Reference

PubSubConnection Class Members

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PubSubConnection Class Members

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Last UpdatedApr 08, 2026
4 minute read

HMI and SCADA

The following tables list the members exposed by PubSubConnection.

	Name	Description
	PubSubConnection Constructor	Initializes a new PubSubConnection instance.

Public Fields

	Name	Description
	MAX_BUFFER_LENGTH	The maximum number of bytes that can be sent in a single PubSub message.
	MAX_TOPIC_LENGTH	The maximum size in characters of a topic name.

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	Name	Description
	GlobalConnection	Gets the Global PubSub connection.

Public Methods

	Name	Description
	Connect	Overloaded. Connects to the local PubSub engine and uses a shared connection to the engine.
	Disconnect	Disconnects the PubSub interface from the PubSub system.
	Dispose	Disposes of unmanaged and managed resources.
	GetGlobalPubSubConnection	Deprecated: Retrieves the global connection.
	GetParameter	Retrieves the value of a PubSub parameter.
	IsConnected	Checks to see if this application is connected to the PubSub system.
	IsGlobal	Deprecated. Checks to see if this PubSub object is using a global connection.
	OpenConnection	Overloaded. Deprecated: Connects to the specified PubSub engine.
	Publish	Overloaded. Deprecated: Publishes a System.Byte.
	Receive	Overloaded. Receives data from PubSub and blocks until data is available or a timeout expires.
	RegisterPersistence	Registers this application as a persistence store.
	RegisterPersistenceCB	Registers this application as a persistence store with callback subscriptions.
	RemovePublisher	Removes this application as a publisher on a topic that it has previously published on.
	SecureTopic	Restricts publishing on this topic and its children to the specified security group.
	SetParameter	Sets an internal PubSub parameter.
	SetPublishTimeout	Deprecated: Sets the timeout to use for publishing messages.
	Subscribe	Overloaded. Subscribes to the indicated topic.
	SubscribeCB	Subscribes to topic with callbacks.
	Unsubscribe	Unsubscribes from the topic.
	UnsubscribeAllCB	Unsubscribes all subscriptions using this callback.
	UnsubscribeCB	Unsubscribes the provided callback from the topic.