setting the other EventNotifier bits for UaAreaFolder

[haydee]

Hi,

Currently, the UaAreaFolder's eventNotifier bit is fixed to SubscribeToEvents. Why is this so? Is historizing not allowed for alarm- area objects?

And if allowed, is there a way where we can set its other bits such as those for History[Read|Write]? SetEventNotifier() is not in its available methods.

Thanks.

[Support Team]

Hi,

the class UaAreaFolder is a very special implementation of the node interface UaObject that uses the type definnition FolderType and sets the EventNotifier to SubscribeToEvents.

If you want to have more flexibility you can use the class OpcUa::FolderType. This is a more generic implementation of the UaObject node interface for FolderType. There you can set all attributes. See the following example. pArea1 and pArea2 have exactly the same settings. pArea3 also allows HistoryRead.

Code: Select all

UaAreaFolder* pArea1 = new UaAreaFolder("DemoArea", UaNodeId("DemoArea", getNameSpaceIndex()), m_defaultLocaleId);
addNodeAndReference(OpcUaId_Server, pArea1, OpcUaId_HasNotifier);

OpcUa::FolderType* pArea2 = new OpcUa::FolderType(UaNodeId("DemoArea2", getNameSpaceIndex()), "DemoArea2", getNameSpaceIndex(), this);
pArea2->setEventNotifier(OpcUa_EventNotifiers_SubscribeToEvents);
addNodeAndReference(OpcUaId_Server, pArea2, OpcUaId_HasNotifier);

OpcUa::FolderType* pArea3 = new OpcUa::FolderType(UaNodeId("DemoArea3", getNameSpaceIndex()), "DemoArea3", getNameSpaceIndex(), this);
pArea3->setEventNotifier(OpcUa_EventNotifiers_SubscribeToEvents | OpcUa_EventNotifiers_HistoryRead);
addNodeAndReference(OpcUaId_Server, pArea3, OpcUaId_HasNotifier);

Best Regards,
Unified Automation Support Team