AVEVA™ PI System™ Feedback Portal

Welcome to our new feedback site!


We created this site to hear your enhancement ideas, suggestions and feedback about AVEVA products and services. All of the feedback you share here is monitored and reviewed by the AVEVA product managers.

To start, take a look at the ideas in the list below and VOTE for your favorite ideas submitted by other users. POST your own idea if it hasn’t been suggested yet. Include COMMENTS and share relevant business case details that will help our product team get more information on the suggestion. Please note that your ideas and comments are visible to all other users.


This page is for feedback specifically for AVEVA PI System. For links to our other feedback portals, please see the tab RESOURCES below.

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Status Completed
Product AVEVA™ PI Server
Categories Analytics & Calculations
Created by Guest
Created on Aug 20, 2022

RELATED IDEAS

Dynamic output time stamp based on Expression

As an analytics user, I would like to be able to have the output time stamp for my expression and roll up analyses decided at evaluation time based on the time stamp of another attribute.
  • ADMIN RESPONSE
    Aug 20, 2022
    PI Server 2018 has been released.
  • Attach files
  • Guest
    Reply
    |     Aug 20, 2022
    Or based on the value (DateTime datatype) of an AF attribute.
  • Guest
    Reply
    |     Aug 20, 2022
    I prefer the expression over only an attribute. Using an expression you can also take data from AF attributes, but also add any required business logic based on the context provided by the analysis.
  • Kenneth Barber
    Reply
    |     Aug 20, 2022
    An example use case is to calculate the derivative of a totalizer function in real time. To be completely correct, the derivative must be a step function, and the slope of the interpolation line between any 2 consecutive events must be outputted at the timestamp of the earlier event due to the way that PI interpolates for step functions.
  • Kenneth Barber
    Reply
    |     Aug 20, 2022
    Another use case is to save lab results (identified by batch number) such that they align with the tag that tracks the batch numbers over time (step = on). Lab results will only be available well after the batch has ended, so a user must be able save lab results at the timestamp when the batch number equals the batch number of the lab result if they want to avoid repeated backfilling.
  • Guest
    Reply
    |     Aug 20, 2022
    In the scheduling options for analyses in PI System Explorer, it would be useful, in the "Advanced..." options menu for Output Time Stamp, to have the ability to set it based on the result of PI expression. For example, set it to the timestamp of the previous event of a tag: PrevEvent('someTag,'*')
  • Guest
    Reply
    |     Aug 20, 2022
    @Stephen Kwan: Will it in the new AF release only be possible to use a timestamp variable or also a string variable that can be evaluated to a timestamp?
  • Guest
    Reply
    |     Aug 20, 2022
    @Holger - specifically, I am referring to a Variable when you configure an Expression. As long as the Variable evaluates to a valid timestamp, then you can use that as your output time stamp.