Historical Data Client, Using Aggregates

The HA Data Client is a purpose-built application for demonstrating OPC Historical Data (see UA Specifications Part 11 - Historical Access (http://www.opcfoundation.org/ua/part11)), and provides you with all of the aggregates that are currently defined in UA Specifications Part 13 - Aggregates (http://www.opcfoundation.org/ua/part13).

Step 1 - Choose the aggregate group

Select the aggregate group by choosing an option from the "Read Type" dropdown:

Step 2 - Choose the Aggregate

Depending upon the "Read Type" selected, the options available under the "Aggregate" field will vary as shown here:

Read Type: Raw, Modified, At Time, Insert, InsertReplace, Replace, Remove, DeleteRaw, DeleteModified, DeleteAtTime.
Aggregates: None.

Read Type: Processed, Subscribe, .
Aggregates: interpolative, average, timeAverage, total, minimum, maximum, minimumActualTime, maximumActualTime, range, annotationCount, count, numberOfTransitions, start, end, delta, durationGood, durationBad, percentGood, worstQuality, timeAverage2, minimum2, maximum2, range2, worstQuality2, total2, minimumActualTime2, maximumActualTime2, durationInStateZero, durationInStateNonZero, standardDevationSample, standardDeviationPopulation, varianceSample, variancePopulation, startBound, endBound, deltaBounds.

All aggregates are described in UA Specifications Part 13 - Aggregates (http://www.opcfoundation.org/ua/part13).

Step 3 - "Go"

Once you have specified the parameters for the operation (read, update, delete etc.) then you simply press the Go button to execute.