SimpleAttributeOperand QML Type▲
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Import Statement: import QtOpcUa
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Since: QtOpcUa 5.13
Detailed Description▲
The SimpleAttributeOperand is specified in OPC-UA part 4, 7.4.4.5. It is used when a node attribute is required as operand.
For example, the following simple attribute operand represents the value of the "Severity" field of the base event type:
Sélectionnez
import QtOpcUa as QtOpcUa
QtOpcUa.SimpleAttributeOperand {
identifier: "Severity"
ns: "http://opcfoundation.org/UA/"
}Property Documentation▲
browsePath : list<OpcUaNodeId>▲
Browse path to the node holding the attribute.
Sélectionnez
import QtOpcUa as QtOpcUa
QtOpcUa.SimpleAttributeOperand {
...
browsePath: [
QtOpcUa.NodeId {
identifier: "Message"
ns: "http://opcfoundation.org/UA/"
}
...
]
}indexRange : string▲
Index range string used to identify a single value or subset of the attribute's value.
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import QtOpcUa as QtOpcUa
QtOpcUa.SimpleAttributeOperand {
...
indexRange: "0:2"
}nodeAttribute : Constants.NodeAttribute▲
Attribute of the node browsePath is pointing to. The default value is Constants.NodeAttribute.Value.
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import QtOpcUa as QtOpcUa
QtOpcUa.SimpleAttributeOperand {
...
nodeAttribute: QtOpcUa.Constants.NodeAttribute.Value
}typeId : string▲
Node id of the type definition node. The operand will be of the type or one of its subtypes. The default value is "ns=0;i=2041".
Sélectionnez
import QtOpcUa as QtOpcUa
QtOpcUa.SimpleAttributeOperand {
...
typeId: "ns=0;i=2041"
}