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Analytics and Notifications for PI System Explorer (PI Server 2018)

Learn about output time stamps for analyses

  • Last UpdatedJan 08, 2025
  • 1 minute read

For any scheduled analysis, the default time stamp for output values is the trigger time. For periodic scheduling, the trigger time is the scheduled evaluation time, and for event-triggered scheduling, the trigger time is the time that a specified attribute changes values.

You can specify the time stamp of analysis output values. By specifying an output time stamp, you can:

  • Produce results that are time-stamped at a specified offset from the trigger time.

  • Produce results that are time-stamped at a particular time each day, regardless of when the analysis is actually evaluated. For example, you can ensure a 6:00 p.m. time stamp for the output of an analysis that calculates results for a daily production shift ending at 6:00 p.m., even if the analysis is not actually evaluated until 10:00 p.m.

  • Repeatedly evaluate an analysis to calculate a forecast value for a particular date and time, as input conditions change. The results of each evaluation have the same timestamp: the analysis output values reflect results from the most recent evaluation.

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