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Browsing an OPC UA Server Against a Static Tag List: Which One, and When Each Is Wrong

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Six boxes showing what a client does during a browse: read the namespace array from node i=2255, browse the Objects folder at i=85, browse each folder in turn or in batches up to MaxNodesPerBrowse, call BrowseNext for every continuation point returned, read the attributes of each node worth keeping, and finish with a tag list, with two numbered break points naming the continuation point errors

Browsing an OPC UA Server Against a Static Tag List: Which One, and When Each Is Wrong Node i=2255 is the NamespaceArray, and one Read of it is the single most-skipped call in industrial OPC UA. Skip it and you type ns=3 into a client, which works for a year and then reads the wrong … Read more

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