The NodeOPCUA API The NodeOPCUA API

  • API Docs for Version: 0.1.0-pre

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    UAVariableType Class

    Extends BaseNode
    Defined in: packages\node-opcua-address-space\src\ua_variable_type.js:53
    Module: opcua.address_space

    Constructor

    UAVariableType

    (
    • options
    )

    Defined in packages\node-opcua-address-space\src\ua_variable_type.js:53

    Parameters:

    • options Object

    Methods

    _clone

    (
    • Constructor
    • options
    • extraInfo
    )
    private

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1694

    Parameters:

    • Constructor Function
    • options Object
    • extraInfo Object

    Returns:

    :

    _clone_children_references

    (
    • newParent
    • [optionalFilter = null]
    • [extraInfo]
    )
    Array private

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1675

    clone properties and methods

    Parameters:

    • newParent Object

      the new parent object to which references of type HasChild will be attached

    • [optionalFilter = null] Function optional

      a filter

    • [extraInfo] Object optional

    Returns:

    Array:

    addReference

    (
    • reference
    )

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:946

    Parameters:

    • reference Object
      • referenceType String
      • [isForward= true] Boolean optional
      • nodeId Node | NodeId | String

    Example:

    view.addReference({ referenceType: "Organizes", nodeId: myDevice });

    or

    myDevice1.addReference({ referenceType: "OrganizedBy", nodeId: view });

    browseNode

    (
    • browseDescription
    • session
    )
    ReferenceDescription[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1505

    browse the node to extract information requested in browseDescription

    Parameters:

    Returns:

    ReferenceDescription[]:

    browseNodeByTargetName

    (
    • relativePathElement
    )
    NodeId[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1137

    Parameters:

    Returns:

    NodeId[]:

    dispose

    ()

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1884

    the dispose method should be called when the node is no longer used, to release back pointer to the address space and clear caches.

    findReference

    (
    • strReference
    • [isForward]
    • [optionalSymbolicName]
    )
    Reference

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:371

    Parameters:

    • strReference String

      the referenceType as a string.

    • [isForward] Boolean | Null optional
    • [optionalSymbolicName] String optional

    Returns:

    Reference:

    findReferences

    (
    • strReference
    • [isForward=true]
    )
    Array

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:325

    Parameters:

    • strReference String

      the referenceType as a string.

    • [isForward=true] Boolean optional

    Returns:

    Array:

    full_name

    () String

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1116

    Returns:

    String:

    the full path name of the node

    getAggregates

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:508

    Returns:

    BaseNode[]:

    return an array with the Aggregates of this object.

    getComponentByName

    (
    • browseName
    )
    BaseNode | Null

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:574

    retrieve a component by name

    Parameters:

    • browseName Object

    Returns:

    BaseNode | Null:

    getComponents

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:519

    Returns:

    BaseNode[]:

    return an array with the components of this object.

    getEventSourceOfs

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:564

    Returns:

    BaseNode[]:

    return a array of the objects for which this node is an EventSource

    getEventSources

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:553

    Returns:

    BaseNode[]:

    return a array with the event source of this object.

    getFalseSubStates

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1959

    Returns:

    BaseNode[]:

    return an array with the SubStates of this object.

    getFolderElements

    () Array

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:615

    returns the list of nodes that this folder object organizes

    Returns:

    Array:

    getMethodById

    (
    • nodeId
    )
    UAMethod | Null

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:654

    Parameters:

    • nodeId Object

    Returns:

    UAMethod | Null:

    getMethodByName

    (
    • browseName
    )
    UAMethod | Null

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:668

    Parameters:

    • browseName Object

    Returns:

    UAMethod | Null:

    getMethods

    () Array

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:625

    returns the list of methods that this object provides

    Returns:

    Array:

    returns an array wit"h Method objects.

    Note: internally, methods are special types of components

    getNotifiers

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:542

    Returns:

    BaseNode[]:

    return a array with the notifiers of this object.

    getProperties

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:531

    Returns:

    BaseNode[]:

    return a array with the properties of this object.

    getPropertyByName

    (
    • browseName
    )
    BaseNode | Null

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:589

    retrieve a property by name

    Parameters:

    • browseName Object

    Returns:

    BaseNode | Null:

    getTrueSubStates

    () BaseNode[]

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1967

    Returns:

    BaseNode[]:

    return an array with the SubStates of this object.

    instantiate

    (
    • options
    )

    Defined in packages\node-opcua-address-space\src\ua_variable_type.js:571

    instantiate an object of this UAVariableType The instantiation takes care of object type inheritance when constructing inner properties

    Parameters:

    • options Object
      • browseName String
      • [description] optional
      • [organizedBy] String | NodeId | BaseNode optional

        the parent Folder holding this object

      • [componentOf] String | NodeId | BaseNode optional

        the parent Object holding this object

      • [notifierOf] NodeId | UANode optional
      • [eventSourceOf] NodeId | UANode optional
      • [optionals] Array optional

        array of browseName of optional component/property to instantiate.

      • [modellingRule] String optional
      • [minimumSamplingInterval=0] Number optional
      • [extensionObject=null] optional

        Note : HasComponent usage scope

        Source | Destination -------------------+--------------------------- Object | Object, Variable,Method ObjectType | -------------------+--------------------------- DataVariable | Variable DataVariableType |

        see : OPCUA 1.03 page 44 $6.4 Instances of ObjectTypes and VariableTypes

    normalize_referenceTypeId

    (
    • addressSpace
    • referenceTypeId
    )
    NodeId

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1334

    Parameters:

    • addressSpace AddressSpace
    • referenceTypeId String | NodeId | Null

      : the referenceType either as a string or a nodeId

    Returns:

    NodeId:

    propagate_back_references

    ()

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:862

    this methods propagates the forward references to the pointed node by inserting backward references to the counter part node

    readAttribute

    (
    • context
    • attributeId
    • [indexRange]
    • [dataEncoding]
    )
    DataValue

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1035

    Parameters:

    • context SessionContext
    • attributeId AttributeId
    • [indexRange] NumericRange optional
    • [dataEncoding] String optional

    Returns:

    DataValue:

    reconstructFunctionalGroupType

    (
    • baseType
    )

    Defined in packages\node-opcua-address-space\src\ua_variable_type.js:491

    recreate functional group types according to type definition

    Parameters:

    • baseType Object

    resolveNodeId

    (
    • nodeId
    )
    NodeId

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:744

    Parameters:

    • nodeId Object

    Returns:

    NodeId:

    unpropagate_back_references

    () private

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:979

    Undo the effect of propagate_back_references

    writeAttribute

    (
    • context
    • writeValue
    • callback
    )
    async

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1090

    Parameters:

    • context SessionContext
    • writeValue Object
      • attributeId AttributeId
      • dataValue DataValue
      • indexRange NumericRange
    • callback Function

    Properties

    hasMethods

    Boolean

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:645

    returns true if the object has some opcua methods

    modellingRule

    String | Undefined

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:1915

    subtypeOf

    NodeId

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:681

    returns the nodeId of the Type which is the super type of this

    typeDefinition

    NodeId

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:480

    returns the nodeId of this node's Type Definition

    typeDefinitionObj

    BaseNode

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:494

    returns the nodeId of this node's Type Definition

    Events

    Description_changed

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:215

    fires when the description attribute is changed.

    Event Payload:

    DisplayName_changed

    Inherited from BaseNode: packages\node-opcua-address-space\src\base_node.js:182

    fires when the displayName is changed.

    Event Payload: