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Status Declined
Categories Analytics & Calculations
Created by Guest
Created on Aug 20, 2022

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Retrieve an Attribute Reference from a String variable

Because some functions in PI AF Analytics require an attribute reference (instead of a tag number or tag value), it would be useful to be able to retrieve an attribute reference using a String variable. This functionality would allow dependent attributes to be referenced using the Concat() function. In the attached example, entering the parent attribute once is all that's required, as opposed to having three separate tag entries restating the hierarchy of attributes. While it is trivially easy to write this hierarchy out for one analytic, it gets cumbersome when you write a significant amount more.
  • ADMIN RESPONSE
    Aug 20, 2022
    Thank you very much for sharing your feedback on the PI Server. After further evaluation, we have decided to decline this item, as we are not planning on implementing it in the near future due to other high priority items across the PI System. Thank you for your feedback, and know that we are listening and reviewing every item that gets submitted!
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  • Guest
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    |     Aug 20, 2022
    This is problematic as you can have more than one AF attribute that is referencing the same PI Point within a given Element. In addition, if you use indirect reference within the configuration of a PI Point Data Reference attribute, this becomes even more confusing. On thing you might consider doing is if you only want to work with PI Point names, is to simply name your attribute the same as your PI Point name. In general we don't recommend this as you would then not be using your AF as effectively as possible.