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JScript version of OPC-UA Write and specify data type example

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18 Jul 2025 20:00 #14331 by Kyle.Oshima@caltrol.com
Replied by Kyle.Oshima@caltrol.com on topic JScript version of OPC-UA Write and specify data type example
re: Please post your code here..., see JScript code below (see attached .zip file containing .js file as well as rudimentary .asp file to run JScript in web browser) -- btw, am running latest OPC Studio 2025.1 version available for download

try {
  var Client = new ActiveXObject( "OpcLabs.EasyOpc.UA.EasyUAClient" );

  var WriteValueArguments1 = new ActiveXObject( "OpcLabs.EasyOpc.UA.OperationModel.UAWriteValueArguments" );

  WriteValueArguments1.EndpointDescriptor.UrlString = "opc.tcp://ILDDEV-PROPLUS:9409/DvOpcUaServer";
  WriteValueArguments1.NodeDescriptor.NodeId.ExpandedText = "ns=2;s=0:EM1/PARAM1.CV";
  WriteValueArguments1.Value = 123.456;
  WriteValueArguments1.ValueTypeCode = 13;

  var arguments = [];

  arguments.push(WriteValueArguments1);

  var results = Client.WriteMultipleValues(arguments);

  Response.Write( results[0].Succeeded );
}
catch ( error ) {
  Response.Write( error.name + " : " + error.message );
}

     

 

File Attachment:

File Name: test-quickopc.zip
File Size:1 KB
  • test-quickopc.jpg

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    18 Jul 2025 12:13 #14330 by support
    Replied by support on topic JScript version of OPC-UA Write and specify data type example
    Hello.

    Please post your code here.

    Best regards

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    18 Jul 2025 02:00 #14329 by Kyle.Oshima@caltrol.com
    JScript version of OPC-UA Write and specify data type example was created by Kyle.Oshima@caltrol.com
    Looking for JScript version of  Examples - OPC Unified Architecture - Write and specify data type  available in online documentation -- tried to convert language syntax from available VBScript version, but JScript returns following error:

    Unable to cast COM object of type 'System.__ComObject' to class type 'System.Object[]'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.

    Please advise.

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