OPC Studio User's Guide and Reference
UpdateWriteAttributeData Method (UADataVariable)



OpcLabs.ServerOpcUA Assembly > OpcLabs.EasyOpc.UA.NodeSpace Namespace > UADataVariable Class : UpdateWriteAttributeData Method
The variable data (value, timestamp, status code) modified by OPC writes.

The value of this parameter cannot be null (Nothing in Visual Basic).

Updates the write attribute data.
Syntax
'Declaration
 
Public Sub UpdateWriteAttributeData( _
   ByVal writeAttributeData As UAAttributeData _
) 
'Usage
 
Dim instance As UADataVariable
Dim writeAttributeData As UAAttributeData
 
instance.UpdateWriteAttributeData(writeAttributeData)
public void UpdateWriteAttributeData( 
   UAAttributeData writeAttributeData
)
public:
void UpdateWriteAttributeData( 
   UAAttributeData^ writeAttributeData
) 

Parameters

writeAttributeData
The variable data (value, timestamp, status code) modified by OPC writes.

The value of this parameter cannot be null (Nothing in Visual Basic).

Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

You can use this method to set the initial data of a writable data variable.

This method sets the WriteAttributeData property to the specified writeAttributeData. If WriteLoopback is true (the default), a clone of writeAttributeData is also set to the ReadAttributeData property.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also

Reference

UADataVariable Class
UADataVariable Members
OpcLabs.EasyOpc.UA.NodeSpace.UADataVariableExtension.UpdateWriteAttributeData(OpcLabs.EasyOpc.UA.NodeSpace.UADataVariable,System.Object)
WriteLoopback Property