Node QML Type

Represents a node on a server. More...

Import Statement:	import QtOpcUa
Since:	QtOpcUa 5.12
Inherited By:	MethodNode and ValueNode

List of all members, including inherited members

Properties

Status : enumeration
browseName : string
connection : Connection
description : LocalizedText
displayName : LocalizedText
errorMessage : string
eventFilter : EventFilter
nodeClass : QOpcUa::NodeClass
nodeId : NodeId
readyToUse : bool
status : Status

Methods

Date getServerTimestamp(Constants::NodeAttribute attribute)
Date getSourceTimestamp(QOpcUa::NodeAttribute attribute)

Detailed Description

 import QtOpcUa as QtOpcUa

 QtOpcUa.Node {
     nodeId : QtOpcUa.NodeId {
         identifier: "s=Example.Method"
         ns: "Example Namespace"
     }
     connection: myConnection
 }

Property Documentation

Status : enumeration

Status of a node.

Constant	Description
`Node.Status.Valid`	Node is ready for use
`Node.Status.InvalidNodeId`	Node id is invalid
`Node.Status.NoConnection`	Not connected to a server
`Node.Status.InvalidNodeType`	Node type on the server does not match the QML type
`Node.Status.InvalidClient`	Invalid connection client
`Node.Status.FailedToResolveNode`	Failed to resolve node
`Node.Status.InvalidObjectNode`	The object node is invalid or its type does not match the expected type
`Node.Status.FailedToReadAttributes`	Failed to read attributes
`Node.Status.FailedToSetupMonitoring`	Failed to setup monitoring

See also status and errorMessage.

browseName : string

The browse name of the node. In case the information is not available an empty string is returned.

connection : Connection

The connection to be used for node instances. The node will automatically be accessible when the associated connection has established a connection to a server.

If this property is not set, the default connection will be used, if any.

See also Connection and Connection::defaultConnection.

description : LocalizedText

The description of the node. In case the information is not available a default constructed LocalizedText is returned.

displayName : LocalizedText

The localized text of the node. In case the information is not available a default constructed LocalizedText is returned.

[read-only] errorMessage : string

A string representation of the current status code.

See also status and Status.

[since 5.13] eventFilter : EventFilter

An event filter allows monitoring events on the server for certain conditions.

This property was introduced in Qt 5.13.

See also EventFilter.

[read-only] nodeClass : QOpcUa::NodeClass

The node class of the node. In case the information is not available QtOpcUa.Constants.NodeClass.Undefined is returned.

nodeId : NodeId

ID of the node on the server to be used. This can be an absolute node ID or a relative node ID.

See also NodeId and RelativeNodeId.

[read-only] readyToUse : bool

This property returns whether the node is ready to use. This happens once after a successful connection to a server was established and the node was successfully set up.

[read-only] status : Status

Current status of the node. The node is only usable when the status is Valid. In any other case it indicates an error.

See also errorMessage and Status.

Method Documentation

Date getServerTimestamp(Constants::NodeAttribute attribute)

Returns the server timestamp of the given attribute.

Date getSourceTimestamp(QOpcUa::NodeAttribute attribute)

Returns the source timestamp of the given attribute.