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Alarms & Events
March 6, 2014
21:38, EET
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yh@ti
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Hi! I am evaluating the Client SDK and I am wondering how do I access the alarm data. I am currently evaluating the client SDK against the ignition opc ua server. I used their designer tool and created an alarm tag (if the selected tag value > 50). With their designer tool, I am able to see the alarms data surface each time the condition requirement met.
Will I be able to see the alarm data via the SDK? I ran across an image of your client tool and I think the answer is yes. but I do not know how.
http://www.prosysopc.com/image…..s_view.png

Also, for the event types thrown by the server, how do I find out their types?

Thank you!

March 7, 2014
8:30, EET
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Jouni Aro
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Check the Client Tutorial, chapter 11. You can see in the example that the EventType is requested as a field for the events.

March 7, 2014
14:42, EET
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yh@ti
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Thanks! We have not been able to see the alarms coming in with the sample client and kept failing when trying to subscribe to the event item and getting the following exception.
com.prosysopc.ua.StatusException: Bad_FilterNotAllowed (0x80450000) “A monitoring filter cannot be used in combination with the attribute specified.” StatusCode=Bad_FilterNotAllowed (0x80450000) “A monitoring filter cannot be used in combination with the attribute specified.”

The error occurred when subscribing to the eventnotifier for the selected node that I know will throw alarms.

March 7, 2014
14:55, EET
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Jouni Aro
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Events can only be listened for Object nodes, which define the EventNotifier attribute with the value of SubscribeToEvents.

If you wish to get all events, you can listen to the Server object.

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