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02/11/2020
Offline
Hello,
I’m working for the first time with OPCUA. I want to create a structure
{Variables (NodeClass: Object; nodeId: ns=1;i=1000)
Test1 (NodeClass: Variable; nodeId: ns=1;s=Test1)
Test2 (NodeClass: Variable; nodeId: ns=1;s=Test2)
}
and to repeat it N times. Is it possible to associate the same variables but a different value of ns to another data structure? For example:
{Variables (NodeClass: Object; nodeId: ns=100;i=1000)
Test1 (NodeClass: Variable; nodeId: ns=100;s=Test1)
Test2 (NodeClass: Variable; nodeId: ns=100;s=Test2)
}
{Variables (NodeClass: Object; nodeId: ns=101;i=1000)
Test1 (NodeClass: Variable; nodeId: ns=101;s=Test1)
Test2 (NodeClass: Variable; nodeId: ns=101;s=Test2)
}
05/30/2017
Online
Not sure what you mean by ‘associate’.
The normal way to do this is create an ObjectType with the Test1/Test2 components. Each instance (no matter the namespace) would have a HasTypeDefinition reference to the ObjectType.
02/11/2020
Offline
Yes, I did this. But what should I do if I want to create another Object with the same instance but different namespace index?
I have added namespace URI in the XML file as shown below
<NamespaceUris>
<Uri>urn:myproject:Head1></Uri>
<Uri>urn:myproject:Head2></Uri>
<Uri>urn:myproject:NS1></Uri>
<Uri>urn:myproject:NS2></Uri>
</NamespaceUris>
and then I have inserted a different namespace for each object. As specified in Namespace Array, ns=5 corresponds to urn:myproject:Head1, instead ns=6 is the index of urn:myproject:Head2
Variables (NodeClass: Object; nodeId: ns=5;i=1000)
Test1 (NodeClass: Variable; nodeId: ns=5;s=Test1)
Test2 (NodeClass: Variable; nodeId: ns=5;s=Test2)
}
{Variables (NodeClass: Object; nodeId: ns=6;i=1000)
Test1 (NodeClass: Variable; nodeId: ns=6;s=Test1)
Test2 (NodeClass: Variable; nodeId: ns=6;s=Test2)
}
Is it correct to proceed like this? Can I edit the file and add the Uri Namespace in URN format?
05/30/2017
Online
Instances belong to any namespace. The contract defined by the ObjectType is based on the BrowseName so the namespace index in the BrowseNames Test1 and Test2 will be the same as the ObjectType but the namespace index in the NodeId can be anything.
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