Why UaExpert can't recognize defined structure datatype?

[guolin]

Hello,

My UaExpert is Version 1.3.0.201.

I created a structure datatype as following in xml based UANodeSet. An variable has a component which has this datatype.

<UADataType NodeId="ns=1;i=3003" BrowseName="1:ODOMETER">
<DisplayName>ODOMETER</DisplayName>
<References>
<Reference ReferenceType="HasEncoding">ns=1;i=5009</Reference>
<Reference ReferenceType="HasEncoding">ns=1;i=5017</Reference>
<Reference ReferenceType="HasSubtype" IsForward="false">i=22</Reference>
</References>
<Definition Name="1:ODOMETER">
<Field DataType="UInt16" Name="ODOMETER_1"/>
<Field DataType="UInt16" Name="ODOMETER_2"/>
<Field DataType="UInt16" Name="ODOMETER_3"/>
<Field DataType="UInt16" Name="ODOMETER_4"/>
<Field DataType="UInt16" Name="ODOMETER_5"/>
</Definition>
</UADataType>


When I draw the valuable to the Data Access View, the DataType shows "NULL"". When I draw ServerStatus which has ServerStatusDatatype , it can showed structured datatype correclty.

What are the possible reason if structure datatype can't be showed ?

Thanks!

[Support Team]

Hi Guolin,

There are several reason why UaExpert cannot display the structrued value.
1) One reason can be that the Variable does have a NULL value. Please make sure that the Variable has a value of the structured DataType. If you are using the XML importer of the C++ SDK, the structured values of the NodeSet2.xml file are skipped by the importer.

2) Another reason could be that the dictionary and the encoding nodes are not valid. There must be a HasEncoding reference from the DataType to node with BrowseName "Default Binary" and TypeDefinition DataTypeEncodingType. This node must have a HasDescription reference to a node with TypeDefinition DataTypeDescriptionType. The value of this node is the node of the DataType within the dictionary. The dictionary is a node below the "OPC Binary" node.

If the server addressspace is created with UaModeler, the addressspace and the dictionary should be correct.

Best Regards
Support Team

[guolin]

Thanks! It seems that the reason is the structured node has not value.

What is the format to set the values in XML? Any documents defines this ?