Learn how to work with analyses

The Analyses tab provides information on analyses, and contains these columns:

• Status

• (Automatic recalculation)

• (Analysis Type)

• Element

• Name (of analysis)

• Template

• Backfilling (status)

  Note: Click one or more column headers to sort analyses by element, name or template.

On the Analyses tab, the "~" character or word "about" (for example: "~1000" or "1-500 of about 1000") indicates an approximate number of analyses. In certain cases, the exact number of analyses is not displayed until all analyses have been loaded.

Analysis selection

Each page of results can contain up to 500 individual analyses. Use the following techniques to quickly select analyses on the Analyses tab:

• To select one or more analyses: Select the check box to the left of an analysis.

• To select all analyses on the current page: Click the checkbox on the top-left corner.

• To select all analyses in the results (when more than 500 analyses exist): Click the checkbox on the top-left corner then click the Select all analyses on all pages link.

  Note: Clearing specific analyses automatically makes your subsequent operation page-based. For example, if you first select all 1000 analyses, and then clear two, the operation will be performed on 498 (500 minus 2) and not 998 (1000-2) analyses.

Backfill and recalculate operations

You can enable, disable, or backfill/recalculate the analyses you have selected. For specific selection criteria, see the "Analysis selection" section above. For PI AF version 2017 R2 and later, you can enable or disable automatic recalculation of the analyses you selected. For more information, see Enable or disable automatic recalculation for multiple analyses.

Obtain adequate permissions

You must have Execute permission on any analyses you want to backfill or recalculate data on. Proper permission can be obtained by mapping your account to the Asset Analytics Recalculation identity. Manual recalculation is only available for PI Analysis Service 2016 R2 or later. In addition, the Data Archive that stores PI points must run version 2016 R2 or later. For more information, see Backfill or recalculate data for multiple analyses.

Expression, rollup, and SQC analyses

Expression, rollup, or Statistical Quality Control (SQC) analyses can backfill or recalculate data if the analysis outputs are mapped to PI point attributes. If PI points already have data for the backfill time period, you can retain existing data and fill in missing data, or delete the data and recalculate.

Event frame generation analyses

Event frame generation analyses can also recalculate event frames over a specified time period. The recalculation process, regardless of the selected option, automatically deletes all existing event frames for that time period, as well as annotations on affected event frames.

Pending operations

The status of these bulk operations is shown: Enable, disable, backfill or recalculate a group of analyses.

View analysis details

Select an analysis and take one of the following actions to view specific information:

• To view a summary of the analysis configuration and status, click the Overview tab.

• To view error details, click the Errors and Warnings tab.

• To view or edit the selected analysis, click Analysis Configuration to go to the Analyses tab of its associated element.