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Status Declined
Categories Event Frames (EF)
Created by Guest
Created on Aug 20, 2022

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Consume event frame data in attributes

As an user, I want to be able to retrieve results of event frame searches and summaries and store them as AF attributes so that I can view event frame data in an AF attribute.
  • ADMIN RESPONSE
    Aug 20, 2022
    Asset Analytics was designed to be a streaming calculation engine. It continuously perform calculations based on streaming input data. The use case described here is not a streaming use case, but rather an adhoc use case in that you want a summary of event frames stored as a PI Point. At this time, we have no plans to implement this idea. Our recommendation is for you to leverage our client tool such as PI DataLink to aggregate and summarize event frames based on your needs.
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  • Guest
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    |     Aug 20, 2022
    This is something we have also run into. Our process has components that are continuous and components that are batch. For reporting, we want to summarise the batches over a time period and then perform additional calculations on the result. For example, totalise the mass across all batches in a shift. To get around this we have built a custom data reference, but I really feel that this would be an excellent standard feature for AF as it would allow event frame data to be brought into the element tree and utilised as a normal attribute.
  • Guest
    Reply
    |     Aug 20, 2022
    In the AF 2017 R2 release, we added a new function - EventFrame that you can use to extract out EF Startime and Endtime. This would enable you to configure an analytics functions to calculate EF statistics. For example, without the event frame, you can configure an attribute to be: TagAvg('attribute1', EventFrame("StartTime"), EventFrame("Endtime")).
  • Guest
    Reply
    |     Aug 20, 2022
    Typo - I meant to say "...within the event frame, you can configure an attribute ...."
  • Guest
    Reply
    |     Aug 20, 2022
    I think Stephen refers to Outputs Expressions. This indeed allows one to do more complex calculations over event frame and store results to event frame attributes. But what is missing is the connection between event frames and classical AF structure (e.g. to get statistics over several events in AF element as an attribute).
  • Guest
    Reply
    |     Aug 20, 2022
    Can you elaborate on what you would want to do with event frame summaries in an AF attribute? Would you, for example, want to visualize it over time or ????