SimpleAttributeOperand QML Type

OPC UA SimpleAttributeOperand 类型。更多

Import Statement: import QtOpcUa
Since: QtOpcUa 5.13
Status: Deprecated since 6.9

自 QtOpcUa 6.9 起,该类型已被弃用。我们强烈建议不要在新代码中使用它。

属性

详细说明

SimpleAttributeOperand 在 OPC UA 1.05 第 4 部分 7.7.4.5 中进行了规定。它用于需要节点属性作为操作数的情况。

例如,以下简单属性操作数表示基本事件类型的 "严重性 "字段的值:

import QtOpcUa as QtOpcUa

QtOpcUa.SimpleAttributeOperand {
    identifier: "Severity"
    ns: "http://opcfoundation.org/UA/"
}

属性文档

browsePath : list<OpcUaNodeId>

持有属性的节点的浏览路径。

import QtOpcUa as QtOpcUa

QtOpcUa.SimpleAttributeOperand {
    ...
    browsePath: [
        QtOpcUa.NodeId {
            identifier: "Message"
            ns: "http://opcfoundation.org/UA/"
         }
         ...
    ]
}

indexRange : string

索引范围字符串,用于标识属性值的单个值或子集。

import QtOpcUa as QtOpcUa

QtOpcUa.SimpleAttributeOperand {
    ...
    indexRange: "0:2"
}

nodeAttribute : Constants.NodeAttribute

browsePath 所指向节点的属性。默认值为Constants.NodeAttribute.Value

import QtOpcUa as QtOpcUa

QtOpcUa.SimpleAttributeOperand {
    ...
    nodeAttribute: QtOpcUa.Constants.NodeAttribute.Value
}

typeId : string

类型定义节点的节点 ID。操作数将是类型或其子类型之一。默认值为"ns=0;i=2041"

import QtOpcUa as QtOpcUa

QtOpcUa.SimpleAttributeOperand {
    ...
    typeId: "ns=0;i=2041"
}

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