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Data Group

The following describes the historical data group settings specific to the WinCC OA Historical Values connector.

Group Types

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The following group types are available:

Summary Values from XLReporter retrieves raw values from the historian and performs calculations on those values for reporting.

Note

By default, summary values are calculated time weighted, and values are propagated based on the last known value. However, to change this so that summary values are calculated strictly on the data returned check use raw values.

Raw Values retrieves values logged to the historian between the start and end time specified.

Group Settings

Setup Tab (Summary Values for XLReporter)

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The Retrieval settings define how data is retrieved for the calculations selected for the group. The following settings are available:

  • Retrieval Mode defines how data is retrieved from the historian. Both Sampled Values and Raw Values are available where Sampled Values uses the Interpolated calculation.

  • Rate defines the interval (in seconds) that sampled values are retrieved from the historian.

  • Lead Time defines the amount of time (in seconds) to retrieve data before the start time.

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