Subscribe to data

Subscriptions in OPC UA allow a client to receive real-time data updates from a server without polling. This is the preferred and most efficient way to continuously monitor changing values. Nodes can be subscribed to in the browsing hierarchy that represent OPC UA variables like AF Attributes or PI Points.

Note: Properties, defined as Variables with a HasTypeDefinition of PropertyType and a HasProperty relationship to their parents, cannot be subscribed to in the PI OPC UA Server.

Please consult the documentation for your OPC UA client to configure OPC UA subscriptions.