Reference

OpcClient.ReadNodeValue Method

Type

OpcClient

Namespace

Opc.UaFx.Client

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Members

OpcClient Members

Also in

Opc.UaFx.Client

since v2.8

Reads the Value attribute of the node specified.

public OpcValue ReadNodeValue(IOpcNodeValue node)

Public Function ReadNodeValue(node As IOpcNodeValue) As OpcValue

Parameters

Name	Type	Description
node	IOpcNodeValue	The IOpcNodeValue instance which represents the node its Value is to be read.

Returns

OpcValue

An instance of the OpcValue class which stores the value of the Value of the node described by the node specified.

Exceptions

Exception	Condition
ArgumentNullException	The node is a null reference (Nothing in Visual Basic).
InvalidOperationException	The read service is currently not supported, especially using the node specified.
ObjectDisposedException	The object has been disposed of.
OpcException	The service execution failed upon different circumstances; for more details see exception details. The following issues can lead to that exception: BadNothingToDo, BadTooManyOperations, BadMaxAgeInvalid and BadTimestampsToReturnInvalid.

Known results: BadNodeIdInvalid, BadNodeIdUnknown, BadAttributeInvalid, BadIndexRangeInvalid, BadIndexRangeNoData, BadDataEncodingInvalid, BadDataEncodingUnsupported, BadNotReadable, BadUserAccessDenied