historizing events

[oroulet]

Hello,

There seem to be support for historizing events in the popc-ua spec and the c++ sdk. However I am unsure how to use it since the example from the tutorial historizes data and events are very different.

Do you have any example or documentation showing how to historize events and how, from a client, getting the historical data?

Regards
Olivier

[Support Team]

Hello Olivier,

We are currently working on examples and missing features for History Access for Events.

The Historical Access functionality in the C++ SDK was never released since the corresponding OPC UA specification was not released yet. Since the OPC UA specification Part 11 (Historical Access) and Part 13 (Aggregates) are now released, the next C++ SDK version 1.4 will have full support for the Historical Access functionality.

Server side implementation:
We would be able to provide sample code that works already with version 1.3.x of the C++ SDK for historical read of events.

Client side implementation:
The method for doing ReadHistoryEvents is not part of 1.3.2. It was added for version 1.4

There will be a technical preview available for version 1.4 end of November 2012. The release is expected for Q1 2013.

Best Regards,
Unified Automation Support Team

[oroulet]

Thank you for you answer.
I am interested in the server example. Can you send it to me?
What is the ReadHistoryEvents Client implementation status for Java and .Net since our planned client architecture will probably be in Java or .NET.

[Support Team]

Hello Olivier,

We checked the server example and it does not compile with the SDK version 1.3.2. There was a helper function added to one of the event filter related classes.

Do you have a source code version of the C++ SDK?
In this case we would be able to provide you an updated helper class together with the example.
Please contact support@unified-automation.com for details.

The JAVA client SDK provides already the capability to read event history.
For the .NET client SDK this is on the feature list for the next version that will be available end of this year.

Best Regards,
Unified Automation Support Team