Data Group
The following describes the historical data group settings specific to the Canary Labs Historian (Read API) connector.
Group Types
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The following Group Types are available:
Summary Values from Server retrieves summary calculations directly from the historian. The following calculations are available:
Interpolated
Average
Maximum
Time of Maximum
Minimum
Time of Minimum
Total
Raw Average
Raw Total
Count
Standard Deviation Sample
Variance Sample
Start Value
End Value
Delta Value
Range
Duration Good
Duration Bad
Percent Good
Percent Bad
Worst Quality
Average 2
Total 2
Minimum 2
Maximum 2
Time of Minimum 2
Time of Maximum 2
Duration in state zero
Duration in state non zero
Start Bound
End Bound
Delta Bounds
Worst Quality 2
Standard Deviation Population
Variance Population
Total Per Minute
Total Per Hour
Total Per 24 Hours
For details on these aggregates, see the Canary Labs documentation.
Summary Values from XLReporter retrieves sampled values from the historian and performs calculations on those samples for reporting.
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
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For Summary Values from XLReporter groups, 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.