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Description
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For each asset managed by an OPC UA Server the user wants to
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Receive a simple, common health status.
This includes (from Devices spec and NAMUR NE 107):
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Normal – Asset functions normally
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Failure – Malfunction of the asset
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Check Function – Function checks are performed, like configuration checks, local operation, etc.
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Off Spec – The asset is operating outside its specification (e.g. measuring or temperature range) or internal diagnoses indicate deviations
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Maintenance required – Asset operates normally, the wear reserve is nearly exhausted or a function will soon be restricted due to operational conditions, e.g. build-up of deposits
Note: If an asset contains sub-assets, the health status of the sub-assets are of importance for the asset, however, how this is considered is an implementation detail (e.g. if you have redundant sub-assets, one might fail without the overall asset failing).
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Receive asset specific information on failure or maintenance conditions. This information should include
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Time of failure
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Severity
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A description, ideally containing cause of a failure and a proposed action, how to solve the failure (e.g. restarting the asset, changing the configuration, replacing asset, doing maintenance operations, etc.)
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Once the user has investigated the cause, she wants the ability to mask and filter issues.
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Information details about maintenance is covered in UC005-1.
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The user wants to find the root cause of why the asset is not operating as expected.
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Ideally the user may want to know how long the asset has been in its current common health status.
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The user wants to get notified if an asset changes its health status.
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