PI Server

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  1. Allow nested operations in AF Asset Analytic functions for 'attribute attname'

    KB00868 recommends Asset Analytics as the right job, but there are some major limitations that inhibit ease of use and deployment, specifically around operations on >1 attribute or tag simultaneously.

    To improve this, AF analyses functions that take in data of type "attribute attname" should be able to process an expression that returns type attribute. Perhaps limited to periodic analyses other toggleable somehow, as there is potential to use a lot of CPU cycles.

    == Example 1: Totalized Mass Flow ==
    Given FIT-001 and DIT-002, return the totalized mass flow (say, kg) over an interval. The current process:
    1. Create…

    18 votes
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    3 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  2. More functions to support operations on arrays

    The arrays in Expression and Event Frame Generation analyses are useful, but use cases are emerging where more functions are needed to reduce/calculate the arrays in more streamlined fashion. For example, Concat function should support array of characters to construct a string.

    10 votes
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    14 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  3. Enlarge area for editing analysis expressions

    When editing an Analysis Expression, only 4.5 lines appear. It would helpful if more lines appeared (greater than 20 lines).

    22 votes
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    1 comment  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  4. Enhance functionality of NumOfChanges

    By now the NumOfChanges Function in AF Analytics does not take into account the value at the start of the timerange. NumOfChanges only counts the amount of changed values of the recorded values in the given timeframe.
    If I query the NumOfChanges for today 12 am till now and my Archived Values are:
    Val1, 11:59 pm (day before)
    Val 2, 4 am
    Val 2, 12 pm
    Val 2, 8 pm

    the function will result in 0 although in the time from 12 am to 4 am there was Val1.
    Regarding TechSupport this is not a bug in the functionality, only…

    7 votes
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    4 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  5. Compare timestamps and output most recent value in child elements to parent element

    From a varying number of child elements (all sharing the same template), I want to find the most recent timestamp of a same template-based attribute, and output the value with timestamp to an attribute in the parent element.
    In addition, constantly (event-triggered/periodic) comparing the timestamps of these child element attributes and always output the "newest" value to the parent element attribute.

    Example:

    From 3 child elements, all sharing the same template with attribute "ALARM", I want to have the most recent value comparing the 3 "ALARM"s, and have this timestamp and value in an attribute in the parent element.

    Suggestions…

    26 votes
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    0 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  6. Enable tracing for one individual Analysis

    On a highly loaded system with thousands of analysis i have one analysis that is misbehaving, missing executions but no skipped count, etc. Currently tracing enables tracing for ALL analysis creating an ocean of logging to plough through for that one event every few days.

    As an AF administrator i would like to turn on Tracing for one or more individual analysis to investigate rare issues that happen over time, without logging ALL analysis evaluations as 99.9999% runs fine.

    18 votes
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    5 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  7. Trigger Time

    Need a way to utilize the trigger time in analysis functions.

    '*' refers to now or snapshot values

    Using timestamp('triggered attribute','*') only works if there is only one triggered attribute configured.

    2 votes
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    13 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  8. Asset Analytics should have a performance counter to indicate data loss on the UpdateManager queue

    Currently there is no way to know if Analytics missed important updates (e.g. start of a batch) without analyzing the message logs.
    However, the AFSDK does provide an indication on the DataPipe if the pipe is in an overflow state, allowing for a consumer to detect if updates have been lost.

    I would like AF Analytics to include a Performance Counter that indicates the UpdateQueue size and/or an indication of lost Events. That allows to monitor if any important data is potentially missed by Analytics.

    3 votes
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    1 comment  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  9. Multiple instances for Asset Analytics

    As a PI administrator I would like to be able to create multiple instances of "PI Analysis Service" windows service for these reasons:
    - avoid new potentially problematic analysis from affecting the ones that are operational and working correctly by setting one production instance and one test instance for example.
    - every instance could have its own log files and we could move some analyses to a new instance to troubleshoot them
    - make possible to distribute the resources usage for asset analytics on more than one server

    174 votes
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    37 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  10. Improve PI Analysis Service Performance for Non-Templatized Analyses

    Instead of putting all non-templatized analyses in one group for evaluation, the PI Analysis Service should divide them up automatically according to some criteria. The goals would be:
    1) Eliminate the need for many "one-off" templates that cause visual clutter in the Library
    2) One expensive non-templatized analysis would not delay all non-templatized analyses; it would be placed in an evaluation group by itself

    2 votes
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    1 comment  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  11. Future Data recalculation and analysis-triggering

    1. Allow auto recalculation of future data. This makes sense to consider, because forecast revisions are a general, industry-agnostic thing.
    2. Another related request might be to add a new option of analysis triggering. Right now for event-trigger analyses, it triggers based off current value. It would make working with future data easier if there could also be an event-trigger for when the latest (most future) value arrives.

    3 votes
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    2 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  12. As an administrator, I would like to be able to backfill data that crosses over a versioning event

    Use case:
    1. An element has an attribute that looks up information on equipment configuration (ex: a pump rate)
    2.  Due to an equipment change, the lookup table and the element were increased in version
    3. A backfill needed to be performed on an analysis that included the attribute which changed, and the date range spans over multiple version effective dates. The desired behavior would be to use the latest version of the attribute's value since the last effective date, and the previous version of the attribute's value before the last effective date.
    4.  Currently, the backfill cannot go further…

    11 votes
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    1 comment  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  13. Allow analysis to utilize event frame properties such as event frame start time in the analysis

    Support analyses on event frames by allowing accessing event frame properties such as StartTime of the event frame as an input to the event frame analysis.

    4 votes
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    4 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  14. Allow dynamic PI Point data references for analysis outputs

    Created on behalf of a customer:
    In order to use fewer attributes in an element, a customer hoped to output analysis results to an attribute with a dynamic PI Point data reference. Unfortunately, with the use of substitution parameters or with string builder, the "dynamic" PI Point data reference will only resolve the tagname once - upon creation (or when the data reference is manually updated). It doesn't act dynamically because it's not actually designed to act that way.

    The current workaround is to create all necessary output attributes, categorize them, and flatten/hide/minimize all categories containing the attributes that are…

    7 votes
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    3 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  15. Analysis service should not close opened EF when last evaluation time is exceeds MaximumAllowedAutoBackfillingSpanInHours

    As PI server administrator I would like that when the Analysis service is restarted with autobackfilling enabled, if there are any EF analysis where last evaluation time is older than *-MaximumAllowedAutoBackfillingSpanInHours, EFs that are opened do not close. Currently they are closed with following message:

    Event frame was closed by the analysis service during auto-backfilling. Analysis service was down for more than 03:00:00

    2 votes
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    0 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  16. Option to generate Event Frame on invalid data reference

    I would like to build an analysis that generates an event frame when one of the referenced PI points is unavailable - i.e. the point does not exist, permissions are missing, or the Data Archive server is unavailable.

    Currently when these conditions occur, the analysis will go into an error condition, but there is no way I can be notified of the situation.

    1 vote
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    4 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  17. New functions for analysis

    New functions are needed for most problems in our fileds process and quality:

    * countif (count with conditions over specified horizon)
    * for loop (even it might be hard to implementate)

    3 votes
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    5 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  18. Automatic Recalculation of Event Frame in PI Analysis

    As a user, I would like to have the option to automatic recalculation of event frame for out-of-order input events in AF analysis. The option is available for expression analysis in PI Analysis  2017 R2 but not for event frame generation analysis.

    73 votes
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    4 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  19. Include subseconds in output timestamp from variable

    Currently we have an analysis with the output timestamp set to be a variable within the analysis. If I map that variable to an output, it includes the subseconds, but the output time for the analysis is truncated to the second. The output time for the analysis should also include the subseconds.

    3 votes
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    3 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
  20. Allow scheduled analyses to ignore circularity

    It should be possible to force an apparent circularity to be ignored if analyses are scheduled and not triggered.

    A thermal efficiency application I have coded as AF Analyses has the following two analyses A and B, such that each is expressed in terms of the other. This is not really a circularity since the logic flow is dynamically switched by a third input X, so that one of these is calculated from independent inputs Y and Z, viz:

    A: if X > 0 then f(B) else f(Y)
    B: if X <= 0 then f(A) else f(Z)

    Clearly, if triggered,…

    3 votes
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    0 comments  ·  Analytics & Calculations  ·  Flag idea as inappropriate…  ·  Admin →
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