12:21, EET
July 22, 2014
13:24, EET
December 21, 2011
Server Tutorial says this:
12.6 MonitoredEventItems
Events are monitored via MonitoredEventItems. In principle, the system is equal to monitoring the DataItems, but you must track the item creations with afterCreateMonitoredEventItem() (in NodeManager or EventManager). And when you are ready to trigger an event, you must call MonitoredEventItem.notifyEvent() to send it to the client. For notifyEvent you will need an EventData structure, which defines the values of all condition fields. You should refer to the OPC Foundation specification for that or take a look at the respective node implementations in the SDK.
13:27, EET
December 21, 2011
15:10, EET
July 22, 2014
15:37, EET
December 21, 2011
Yes, all generated Java classes are based on UaNodes. So you will need to write your application so that it provides the data for correct nodes yourself, although there are no actual nodes in the background.
The alarm nodes are typically exposed as objects in the address space, since they have a state. Simple events typically are not in the address space, so those you can just trigger
It might be possible to write a “hybrid” node manager that has alarm nodes for the meta data, but keeps the rest of the data in the back-end system. But we have not actually tried that, and it is probably not possible to make it work at the moment. You may of course try and let us know what kind of limitations you find out.
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