GitHub user splatch added a comment to the discussion: Subscribe OPC/UA Node

>From OPC UA point (as far I know) there is no difference what you wish to do 
>with subscribed values. My memory is bit blurry but there are two modes of 
>subscriptions - cyclic and event. In your case, I believe it would be better 
>to model (on device end) whole thing as an event, cause then your subscriber 
>will receive a complete picture in trigger fashion.
With cyclic subscription you will need to do detection of trigger tag changes.

GitHub link: 
https://github.com/apache/plc4x/discussions/2253#discussioncomment-14374776

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