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Using whatever means are available, change the semantic for a given node

kishore kumar mallipudi

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03/21/2022 - 05:26

CTT Lab test case:

A subscription exists in a Client that will be notified when the semantic changes on the given node. The event is received.

Category - basicinfosemantic change

Could you please let me know how this can be tested using OPC UA client?

Regards,

Kishore M

Alexander Allmendinger

Germany

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03/22/2022 - 02:15

Hello Kishore,

in order to verify the correct behavior of a client for the semantic change bit, you'll need a server which is generating this event. Then the client needs to be connected to the OPC UA Server monitoring data where the server allows to change the semantics during runtime and generate an SemanticChanged event. When the client receives this event, it needs to react by collecting the new semantics before using the received information.

You'll find more information about this event and the expected behavior in the specification:

OPC 10000-5 Unified Architecture Part 5 Information Model Semantic Change Event Type | OPC UA Online Reference (opcfoundation.org)

Regards,
Alexander Allmendinger

kishore kumar mallipudi

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03/25/2022 - 00:53

Thank you very much Alaxander