The example below writes a single value, specifying the type to be written using a .NET Type.
Note that this example uses an overload of the WriteValue method that is not available in COM. If you are calling from a COM language or tool, use the WriteMultipleValues method instead. An example for that is given further down.
// This example shows how to write a value into a single node, specifying a type explicitly. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the server reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // For a selected subset of most common types, you can also use a different overload of the WriteValue method, and specify // a value from the TypeCode enumeration instead. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. using System; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples._EasyUAClient { partial class WriteValue { public static void Type() { UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) // or "https://opcua.demo-this.com:51212/UA/SampleServer/" // Instantiate the client object var client = new EasyUAClient(); // Modify value of a node try { client.WriteValue( endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 12345, typeof(Int32)); } catch (UAException uaException) { Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message); } } } }
' This example shows how to write a value into a single node, specifying a type explicitly. ' ' Reasons for specifying the type explicitly might be: ' - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. ' - The data type that the server reports is incorrect. ' - Writing with an explicitly specified type is more efficient. ' ' For a selected subset of most common types, you can also use a different overload of the WriteValue method, and specify ' a value from the TypeCode enumeration instead. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . ' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET . ' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own ' a commercial license in order to use Online Forums, and we reply to every post. Imports System Imports OpcLabs.EasyOpc.UA Imports OpcLabs.EasyOpc.UA.OperationModel Namespace _EasyUAClient Partial Friend Class WriteValue Public Shared Sub Type() ' Define which server we will work with. Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" ' or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) ' or "https://opcua.demo-this.com:51212/UA/SampleServer/" ' Instantiate the client object Dim client = New EasyUAClient() ' Modify value of a node Try client.WriteValue( _ endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10221", _ 12345, _ GetType(Int32)) Catch uaException As UAException Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message) Exit Sub End Try End Sub End Class End Namespace
The example below writes a single value, specifying the type to be written using a TypeCode.
Note that this example uses an overload of the WriteValue method that is not available in COM. If you are calling from a COM language or tool, use the WriteMultipleValues method instead. An example for that is given further down.
// This example shows how to write a value into a single node, specifying a type code explicitly. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // TypeCode is easy to use, but it does not cover all possible types. It is also possible to specify the .NET Type, using // a different overload of the WriteValue method. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. using System; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples._EasyUAClient { partial class WriteValue { public static void TypeCode() { UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) // or "https://opcua.demo-this.com:51212/UA/SampleServer/" // Instantiate the client object. var client = new EasyUAClient(); Console.WriteLine("Modifying value of a node..."); try { client.WriteValue( endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 12345, System.TypeCode.Int32); } catch (UAException uaException) { Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}"); return; } Console.WriteLine("Finished."); } } }
# This example shows how to write a value into a single node, specifying a type code explicitly. # # Reasons for specifying the type explicitly might be: # - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. # - The data type that the reports is incorrect. # - Writing with an explicitly specified type is more efficient. # # TypeCode is easy to use, but it does not cover all possible types. It is also possible to specify the .NET Type, using # a different overload of the WriteValue method. # # Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . # OPC client and subscriber examples in PowerShell on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PowerShell . # Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own # a commercial license in order to use Online Forums, and we reply to every post. #requires -Version 5.1 using namespace OpcLabs.EasyOpc.UA using namespace OpcLabs.EasyOpc.UA.OperationModel # The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows . Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUA.dll" Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUAComponents.dll" [UAEndpointDescriptor]$endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" # or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) # or "https://opcua.demo-this.com:51212/UA/SampleServer/" # Instantiate the client object. $client = New-Object EasyUAClient Write-Host "Modifying value of a node..." try { [IEasyUAClientExtension]::WriteValue($client, $endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 12345, [System.TypeCode]::Int32) } catch [UAException] { Write-Host "*** Failure: $($PSItem.Exception.GetBaseException().Message)" return } Write-Host "Finished."
' This example shows how to write a value into a single node, specifying a type code explicitly. ' ' Reasons for specifying the type explicitly might be: ' - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. ' - The data type that the reports is incorrect. ' - Writing with an explicitly specified type is more efficient. ' ' TypeCode is easy to use, but it does not cover all possible types. It is also possible to specify the .NET Type, using ' a different overload of the WriteValue method. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . ' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET . ' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own ' a commercial license in order to use Online Forums, and we reply to every post. Imports OpcLabs.EasyOpc.UA Imports OpcLabs.EasyOpc.UA.OperationModel Namespace _EasyUAClient Partial Friend Class WriteValue Public Shared Sub TypeCode() ' Define which server we will work with. Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" ' or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) ' or "https://opcua.demo-this.com:51212/UA/SampleServer/" ' Instantiate the client object Dim client = New EasyUAClient() ' Modify value of a node Try client.WriteValue( _ endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10221", _ 12345, _ System.TypeCode.Int32) Catch uaException As UAException Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message) Exit Sub End Try End Sub End Class End Namespace
// This example shows how to write a value into a single node, specifying a type code explicitly. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // TypeCode is easy to use, but it does not cover all possible types. It is also possible // to specify the .NET Type, using a different overload of the WriteValue method. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. class procedure WriteValue.TypeCode; var Arguments: OleVariant; Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient; EndpointDescriptorUrlString: string; WriteResult: _UAWriteResult; WriteValueArguments1: _UAWriteValueArguments; Results: OleVariant; begin EndpointDescriptorUrlString := //'http://opcua.demo-this.com:51211/UA/SampleServer'; //'https://opcua.demo-this.com:51212/UA/SampleServer/'; 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'; // Prepare the arguments WriteValueArguments1 := CoUAWriteValueArguments.Create; WriteValueArguments1.EndpointDescriptor.UrlString := EndpointDescriptorUrlString; WriteValueArguments1.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/ ;i=10221'; WriteValueArguments1.Value := 12345; WriteValueArguments1.ValueTypeCode := TypeCode_Int32; // here is the type explicitly specified Arguments := VarArrayCreate([0, 0], varVariant); Arguments[0] := WriteValueArguments1; // Instantiate the client object Client := CoEasyUAClient.Create; // Modify value of node TVarData(Results).VType := varArray or varVariant; TVarData(Results).VArray := PVarArray(Client.WriteMultipleValues(Arguments)); WriteResult := IUnknown(Results[0]) as _UAWriteResult; if not WriteResult.Succeeded then WriteLn('*** Failure: ', WriteResult.Exception.GetBaseException.Message); VarClear(Results); VarClear(Arguments); end;
// This example shows how to write a value into a single node, specifying a type code explicitly. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // TypeCode is easy to use, but it does not cover all possible types. It is also possible // to specify the .NET Type, using a different overload of the WriteValue method. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in PHP on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PHP . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. const TypeCode_Int32 = 9; $EndpointDescriptor = //"http://opcua.demo-this.com:51211/UA/SampleServer"; //"https://opcua.demo-this.com:51212/UA/SampleServer/"; "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // Prepare the arguments $WriteValueArguments1 = new COM("OpcLabs.EasyOpc.UA.OperationModel.UAWriteValueArguments"); $WriteValueArguments1->EndpointDescriptor->UrlString = $EndpointDescriptor; $WriteValueArguments1->NodeDescriptor->NodeId->ExpandedText = "nsu=http://test.org/UA/Data/ ;i=10221"; $WriteValueArguments1->Value = 12345; $WriteValueArguments1->ValueTypeCode = TypeCode_Int32; // here is the type explicitly specified $arguments[0] = $WriteValueArguments1; // Instantiate the client object $Client = new COM("OpcLabs.EasyOpc.UA.EasyUAClient"); // Modify value of node $results = $Client->WriteMultipleValues($arguments); $WriteResult = $results[0]; if (!$WriteResult->Succeeded) printf("*** Failure: %s\n", $WriteResult->Exception->GetBaseException()->Message);
Rem This example shows how to write a value into a single node, specifying a type code explicitly. Rem Rem Reasons for specifying the type explicitly might be: Rem - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. Rem - The data type that the reports is incorrect. Rem - Writing with an explicitly specified type is more efficient. Rem Rem TypeCode is easy to use, but it does not cover all possible types. It is also possible to specify the .NET Type, using Rem a different overload of the WriteValue method. Rem Rem Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . Rem OPC client and subscriber examples in VBScript on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBScript . Rem Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own Rem a commercial license in order to use Online Forums, and we reply to every post. Option Explicit Const TypeCode_Int32 = 9 Dim endpointDescriptor: endpointDescriptor = _ "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" '"http://opcua.demo-this.com:51211/UA/SampleServer" '"https://opcua.demo-this.com:51212/UA/SampleServer/" ' Instantiate the client object Dim Client: Set Client = CreateObject("OpcLabs.EasyOpc.UA.EasyUAClient") ' Prepare the arguments Dim WriteValueArguments1: Set WriteValueArguments1 = CreateObject("OpcLabs.EasyOpc.UA.OperationModel.UAWriteValueArguments") WriteValueArguments1.EndpointDescriptor.UrlString = endpointDescriptor WriteValueArguments1.NodeDescriptor.NodeId.ExpandedText = "nsu=http://test.org/UA/Data/ ;i=10221" WriteValueArguments1.Value = 12345 WriteValueArguments1.ValueTypeCode = TypeCode_Int32 Dim arguments(0) Set arguments(0) = WriteValueArguments1 ' Modify value of a node Dim results: results = Client.WriteMultipleValues(arguments) Dim WriteResult: Set WriteResult = results(0) If Not WriteResult.Succeeded Then WScript.Echo "*** Failure: " & WriteResult.Exception.GetBaseException().Message End If
REM This example shows how to write a value into a single node, specifying a type code explicitly. REM REM Reasons for specifying the type explicitly might be: REM - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. REM - The data type that the reports is incorrect. REM - Writing with an explicitly specified type is more efficient. REM REM TypeCode is easy to use, but it does not cover all possible types. It is also possible to specify the .NET Type, using REM a different overload of the WriteValue method. REM REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB . REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own REM a commercial license in order to use Online Forums, and we reply to every post. Public Sub WriteValue_TypeCode_Command_Click() OutputText = "" Const TypeCode_Int32 = 9 Dim endpointDescriptor As String 'endpointDescriptor = "http://opcua.demo-this.com:51211/UA/SampleServer" 'endpointDescriptor = "https://opcua.demo-this.com:51212/UA/SampleServer/" endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" ' Instantiate the client object Dim Client As New EasyUAClient ' Prepare the arguments Dim WriteValueArguments1 As New UAWriteValueArguments WriteValueArguments1.endpointDescriptor.UrlString = endpointDescriptor WriteValueArguments1.nodeDescriptor.NodeId.expandedText = "nsu=http://test.org/UA/Data/ ;i=10221" WriteValueArguments1.SetValue 12345 WriteValueArguments1.ValueTypeCode = TypeCode_Int32 Dim arguments(0) As Variant Set arguments(0) = WriteValueArguments1 ' Modify value of node Dim results As Variant results = Client.WriteMultipleValues(arguments) ' Display results Dim Result As UAWriteResult: Set Result = results(0) If Not Result.Succeeded Then OutputText = OutputText & "*** Failure: " & Result.Exception.GetBaseException().Message & vbCrLf End If End Sub
# This example shows how to write a value into a single node, specifying a type code explicitly. # # Reasons for specifying the type explicitly might be: # - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. # - The data type that the reports is incorrect. # - Writing with an explicitly specified type is more efficient. # # TypeCode is easy to use, but it does not cover all possible types. It is also possible to specify the .NET Type, using # a different overload of the WriteValue method. # # Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . # OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python . # Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own # a commercial license in order to use Online Forums, and we reply to every post. # The QuickOPC package is needed. Install it using "pip install opclabs_quickopc". import opclabs_quickopc # Import .NET namespaces. from System import * from OpcLabs.EasyOpc.UA import * from OpcLabs.EasyOpc.UA.OperationModel import * endpointDescriptor = UAEndpointDescriptor('opc.tcp://opcua.demo-this.com:51210/UA/SampleServer') # or 'http://opcua.demo-this.com:51211/UA/SampleServer' (currently not supported) # or 'https://opcua.demo-this.com:51212/UA/SampleServer/' # Instantiate the client object. client = EasyUAClient() print('Modifying value of a node...') try: IEasyUAClientExtension.WriteValue(client, endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10221'), 12345, TypeCode.Int32) except UAException as uaException: print('*** Failure: ' + uaException.GetBaseException().Message) exit() print('Finished.')
The example below writes multiple values, specifying the types to be written in the ValueType property, using a .NET Type.
Note that this approach is, at least theoretically, also available in COM languages and tools, but due to difficulties with obtaining the .NET Type, you are much more likely to specify the type using the ValueTypeCode or ValueTypeFullName property, for which the examples are given further down.
// This example shows how to write values into 3 nodes at once, specifying a type explicitly. It tests for success of each // write and displays the exception message in case of failure. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // Alternative ways of specifying the type are using the ValueTypeCode or ValueTypeFullName properties. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. using System; using OpcLabs.BaseLib.OperationModel; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples._EasyUAClient { partial class WriteMultipleValues { public static void ValueType() { UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) // or "https://opcua.demo-this.com:51212/UA/SampleServer/" // Instantiate the client object var client = new EasyUAClient(); // Modify value of a node OperationResult[] operationResultArray = client.WriteMultipleValues(new[] { new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 23456) {ValueType = typeof(Int32)}, // here is the type explicitly specified new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") {ValueType = typeof(Double)}, // here is the type explicitly specified new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") {ValueType = typeof(string)} // here is the type explicitly specified }); for (int i = 0; i < operationResultArray.Length; i++) if (operationResultArray[i].Succeeded) Console.WriteLine("Result {0}: success", i); else Console.WriteLine("Result {0}: {1}", i, operationResultArray[i].Exception.GetBaseException().Message); } } }
' This example shows how to write values into 3 nodes at once, specifying a type explicitly. It tests for success of each ' write and displays the exception message in case of failure. ' ' Reasons for specifying the type explicitly might be: ' - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. ' - The data type that the reports is incorrect. ' - Writing with an explicitly specified type is more efficient. ' ' Alternative ways of specifying the type are using the ValueTypeCode or ValueTypeFullName properties. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . ' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET . ' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own ' a commercial license in order to use Online Forums, and we reply to every post. Imports System Imports OpcLabs.BaseLib.OperationModel Imports OpcLabs.EasyOpc.UA Imports OpcLabs.EasyOpc.UA.OperationModel Namespace _EasyUAClient Partial Friend Class WriteMultipleValues Public Shared Sub ValueType() ' Define which server we will work with. Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" ' or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) ' or "https://opcua.demo-this.com:51212/UA/SampleServer/" ' Instantiate the client object Dim client = New EasyUAClient() ' Modify value of a node Dim operationResultArray() As OperationResult = client.WriteMultipleValues(New UAWriteValueArguments() _ { _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10221", 23456) _ With {.ValueType = GetType(Int32)}, _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") _ With {.ValueType = GetType(Double)}, _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") _ With {.ValueType = GetType(String)} _ } _ ) For i As Integer = 0 To operationResultArray.Length - 1 If operationResultArray(i).Succeeded Then Console.WriteLine("Result {0}: success", i) Else Console.WriteLine("Result {0}: {1}", i, operationResultArray(i).Exception.GetBaseException().Message) End If Next i End Sub End Class End Namespace
The example below writes multiple values, specifying the types to be written in the ValueTypeCode property, using a TypeCode.
This approach is suitable for a basic set of types covered by the TypeCode enumeration, and is also accessible to COM languages and tools. If you need to specify a type that is not covered by the TypeCode enumeration, use the ValueType or ValueTypeFullName property instead.
// This example shows how to write values into 3 nodes at once, specifying a type code explicitly. It tests for success of // each write and displays the exception message in case of failure. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // Alternative ways of specifying the type are using the ValueType or ValueTypeFullName properties. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. using System; using OpcLabs.BaseLib.OperationModel; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples._EasyUAClient { partial class WriteMultipleValues { public static void ValueTypeCode() { UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) // or "https://opcua.demo-this.com:51212/UA/SampleServer/" // Instantiate the client object. var client = new EasyUAClient(); Console.WriteLine("Modifying values of nodes..."); OperationResult[] operationResultArray = client.WriteMultipleValues(new[] { new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 23456) {ValueTypeCode = TypeCode.Int32}, // here is the type explicitly specified new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") {ValueTypeCode = TypeCode.Double}, // here is the type explicitly specified new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") {ValueTypeCode = TypeCode.String} // here is the type explicitly specified }); for (int i = 0; i < operationResultArray.Length; i++) if (operationResultArray[i].Succeeded) Console.WriteLine($"Result {i}: success"); else Console.WriteLine($"Result {i}: {operationResultArray[i].Exception.GetBaseException().Message}"); // Example output: // //Modifying values of nodes... //Result 0: success //Result 1: Input string was not in a correct format. //+ Attempting to change an object of type "System.String" to type "System.Double". //+ The specified original value (string) was "This string cannot be converted to Double". //+ The node descriptor used was: NodeId="nsu=http://test.org/UA/Data/ ;i=10226". //+ The client method called (or event/callback invoked) was 'WriteMultiple[3]'. //Result 2: OPC UA service result - {BadNodeIdUnknown}. The node id refers to a node that does not exist in the server address space. //+ The node descriptor used was: NodeId="nsu=http://test.org/UA/Data/ ;s=UnknownNode". //+ The client method called (or event/callback invoked) was 'WriteMultiple[3]'. } } }
# This example shows how to write values into 3 nodes at once, specifying a type code explicitly. It tests for success of # each write and displays the exception message in case of failure. # # Reasons for specifying the type explicitly might be: # - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. # - The data type that the reports is incorrect. # - Writing with an explicitly specified type is more efficient. # # Alternative ways of specifying the type are using the ValueType or ValueTypeFullName properties. # # Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . # OPC client and subscriber examples in PowerShell on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PowerShell . # Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own # a commercial license in order to use Online Forums, and we reply to every post. #requires -Version 5.1 using namespace OpcLabs.EasyOpc.UA using namespace OpcLabs.EasyOpc.UA.OperationModel # The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows . Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUA.dll" Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUAComponents.dll" [UAEndpointDescriptor]$endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" # or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) # or "https://opcua.demo-this.com:51212/UA/SampleServer/" # Instantiate the client object. $client = New-Object EasyUAClient Write-Host "Modifying values of nodes..." $operationResultArray = $client.WriteMultipleValues([UAWriteValueArguments[]]@( (New-Object UAWriteValueArguments($endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 23456) ` -Property @{ValueTypeCode = [TypeCode]::Int32}), # here is the type explicitly specified (New-Object UAWriteValueArguments($endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") ` -Property @{ValueTypeCode = [TypeCode]::Double}), # here is the type explicitly specified (New-Object UAWriteValueArguments($endpointDescriptor, "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") ` -Property @{ValueTypeCode = [TypeCode]::String}) # here is the type explicitly specified )) for ($i = 0; $i -lt $operationResultArray.Length; $i++) { if ($operationResultArray[$i].Succeeded) { Write-Host "Result $($i): success" } else { Write-Host "Result $($i): $($operationResultArray[$i].Exception.GetBaseException().Message)" } } # Example output: # #Modifying values of nodes... #Result 0: success #Result 1: Input string was not in a correct format. #+ Attempting to change an object of type "System.String" to type "System.Double". #+ The specified original value (string) was "This string cannot be converted to Double". #+ The node descriptor used was: NodeId="nsu=http://test.org/UA/Data/ ;i=10226". #+ The client method called (or event/callback invoked) was 'WriteMultiple[3]'. #Result 2: The status of the OPC-UA attribute data is not Good. The actual status is 'BadNodeIdUnknown'. #+ During writing or method calls, readings may occur when value type is not specified. #+ The node descriptor used was: NodeId="nsu=http://test.org/UA/Data/ ;s=UnknownNode". #+ The client method called (or event/callback invoked) was 'WriteMultiple[3]'.
' This example shows how to write values into 3 nodes at once, specifying a type code explicitly. It tests for success of ' each write and displays the exception message in case of failure. ' ' Reasons for specifying the type explicitly might be: ' - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. ' - The data type that the reports is incorrect. ' - Writing with an explicitly specified type is more efficient. ' ' Alternative ways of specifying the type are using the ValueType or ValueTypeFullName properties. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . ' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET . ' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own ' a commercial license in order to use Online Forums, and we reply to every post. Imports System Imports OpcLabs.BaseLib.OperationModel Imports OpcLabs.EasyOpc.UA Imports OpcLabs.EasyOpc.UA.OperationModel Namespace _EasyUAClient Partial Friend Class WriteMultipleValues Public Shared Sub ValueTypeCode() ' Define which server we will work with. Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" ' or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) ' or "https://opcua.demo-this.com:51212/UA/SampleServer/" ' Instantiate the client object Dim client = New EasyUAClient() ' Modify value of a node Dim operationResultArray() As OperationResult = client.WriteMultipleValues(New UAWriteValueArguments() _ { _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10221", 23456) _ With {.ValueTypeCode = TypeCode.Int32}, _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") _ With {.ValueTypeCode = TypeCode.Double}, _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") _ With {.ValueTypeCode = TypeCode.String} _ } _ ) For i As Integer = 0 To operationResultArray.Length - 1 If operationResultArray(i).Succeeded Then Console.WriteLine("Result {0}: success", i) Else Console.WriteLine("Result {0}: {1}", i, operationResultArray(i).Exception.GetBaseException().Message) End If Next i End Sub End Class End Namespace
// This example shows how to write values into 3 nodes at once, specifying a type code explicitly. It tests for success of // each write and displays the exception message in case of failure. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // Alternative ways of specifying the type are using the ValueType or ValueTypeFullName properties. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. class procedure WriteMultipleValues.ValueTypeCode; var Arguments: OleVariant; Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient; I: Cardinal; WriteResult: _UAWriteResult; WriteValueArguments1, WriteValueArguments2, WriteValueArguments3: _UAWriteValueArguments; Results: OleVariant; begin WriteValueArguments1 := CoUAWriteValueArguments.Create; WriteValueArguments1.EndpointDescriptor.UrlString := //'http://opcua.demo-this.com:51211/UA/SampleServer'; //'https://opcua.demo-this.com:51212/UA/SampleServer/'; 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'; WriteValueArguments1.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/ ;i=10221'; WriteValueArguments1.Value := 23456; WriteValueArguments1.ValueTypeCode := TypeCode_Int32; // here is the type explicitly specified WriteValueArguments2 := CoUAWriteValueArguments.Create; WriteValueArguments2.EndpointDescriptor.UrlString := //'http://opcua.demo-this.com:51211/UA/SampleServer'; //'https://opcua.demo-this.com:51212/UA/SampleServer/'; 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'; WriteValueArguments2.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/ ;i=10226'; WriteValueArguments2.Value := 'This string cannot be converted to Double'; WriteValueArguments2.ValueTypeCode := TypeCode_Double; // here is the type explicitly specified WriteValueArguments3 := CoUAWriteValueArguments.Create; WriteValueArguments3.EndpointDescriptor.UrlString := //'http://opcua.demo-this.com:51211/UA/SampleServer'; //'https://opcua.demo-this.com:51212/UA/SampleServer/'; 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'; WriteValueArguments3.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/ ;s=UnknownNode'; WriteValueArguments3.Value := 'ABC'; WriteValueArguments3.ValueTypeCode := TypeCode_String; // here is the type explicitly specified Arguments := VarArrayCreate([0, 2], varVariant); Arguments[0] := WriteValueArguments1; Arguments[1] := WriteValueArguments2; Arguments[2] := WriteValueArguments3; // Instantiate the client object Client := CoEasyUAClient.Create; // Modify values of nodes TVarData(Results).VType := varArray or varVariant; TVarData(Results).VArray := PVarArray(Client.WriteMultipleValues(Arguments)); // Display results for I := VarArrayLowBound(Results, 1) to VarArrayHighBound(Results, 1) do begin WriteResult := IInterface(Results[I]) as _UAWriteResult; if WriteResult.Succeeded then WriteLn('Result ', I, ' success') else WriteLn('Result ', I, ': ', WriteResult.Exception.GetBaseException.Message); end; VarClear(Results); VarClear(Arguments); end;
// This example shows how to write values into 3 nodes at once, specifying a type code explicitly. It tests for success of // each write and displays the exception message in case of failure. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // Alternative ways of specifying the type are using the ValueType or ValueTypeFullName properties. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in PHP on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PHP . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. const TypeCode_Int32 = 9; const TypeCode_Double = 14; const TypeCode_String = 18; $WriteValueArguments1 = new COM("OpcLabs.EasyOpc.UA.OperationModel.UAWriteValueArguments"); $WriteValueArguments1->EndpointDescriptor->UrlString = //"http://opcua.demo-this.com:51211/UA/SampleServer"; //"https://opcua.demo-this.com:51212/UA/SampleServer/"; "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; $WriteValueArguments1->NodeDescriptor->NodeId->ExpandedText = "nsu=http://test.org/UA/Data/ ;i=10221"; $WriteValueArguments1->Value = 23456; $WriteValueArguments1->ValueTypeCode = TypeCode_Int32; // here is the type explicitly specified $WriteValueArguments2 = new COM("OpcLabs.EasyOpc.UA.OperationModel.UAWriteValueArguments"); $WriteValueArguments2->EndpointDescriptor->UrlString = //"http://opcua.demo-this.com:51211/UA/SampleServer"; //"https://opcua.demo-this.com:51212/UA/SampleServer/"; "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; $WriteValueArguments2->NodeDescriptor->NodeId->ExpandedText = "nsu=http://test.org/UA/Data/ ;i=10226"; $WriteValueArguments2->Value = "This string cannot be converted to Double"; $WriteValueArguments2->ValueTypeCode = TypeCode_Double; // here is the type explicitly specified $WriteValueArguments3 = new COM("OpcLabs.EasyOpc.UA.OperationModel.UAWriteValueArguments"); $WriteValueArguments3->EndpointDescriptor->UrlString = //"http://opcua.demo-this.com:51211/UA/SampleServer"; //"https://opcua.demo-this.com:51212/UA/SampleServer/"; "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; $WriteValueArguments3->NodeDescriptor->NodeId->ExpandedText = "nsu=http://test.org/UA/Data/ ;s=UnknownNode"; $WriteValueArguments3->Value = "ABC"; $WriteValueArguments3->ValueTypeCode = TypeCode_String; // here is the type explicitly specified $arguments[0] = $WriteValueArguments1; $arguments[1] = $WriteValueArguments2; $arguments[2] = $WriteValueArguments3; // Instantiate the client object $Client = new COM("OpcLabs.EasyOpc.UA.EasyUAClient"); // Modify values of nodes $results = $Client->WriteMultipleValues($arguments); // Display results for ($i = 0; $i < count($results); $i++) { $WriteResult = $results[$i]; if ($WriteResult->Succeeded) printf("Result %d success\n", $i); else printf("Result d: s \n", $i, $WriteResult->Exception->GetBaseException()->Message); }
REM This example shows how to write values into 3 nodes at once, specifying a type code explicitly. It tests for success of REM each write and displays the exception message in case of failure. REM REM Reasons for specifying the type explicitly might be: REM - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. REM - The data type that the reports is incorrect. REM - Writing with an explicitly specified type is more efficient. REM REM Alternative ways of specifying the type are using the ValueType or ValueTypeFullName properties. REM REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB . REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own REM a commercial license in order to use Online Forums, and we reply to every post. Public Sub WriteMultipleValues_ValueTypeCode_Command_Click() OutputText = "" Const TypeCode_Int32 = 9 Const TypeCode_Double = 14 Const TypeCode_String = 18 ' Instantiate the client object Dim Client As New EasyUAClient Dim WriteValueArguments1 As New UAWriteValueArguments WriteValueArguments1.endpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" WriteValueArguments1.nodeDescriptor.NodeId.expandedText = "nsu=http://test.org/UA/Data/ ;i=10221" WriteValueArguments1.SetValue 23456 WriteValueArguments1.ValueTypeCode = TypeCode_Int32 ' here is the type explicitly specified Dim WriteValueArguments2 As New UAWriteValueArguments WriteValueArguments2.endpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" WriteValueArguments2.nodeDescriptor.NodeId.expandedText = "nsu=http://test.org/UA/Data/ ;i=10226" WriteValueArguments2.SetValue "This string cannot be converted to Double" WriteValueArguments2.ValueTypeCode = TypeCode_Double ' here is the type explicitly specified Dim WriteValueArguments3 As New UAWriteValueArguments WriteValueArguments3.endpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" WriteValueArguments3.nodeDescriptor.NodeId.expandedText = "nsu=http://test.org/UA/Data/ ;s=UnknownNode" WriteValueArguments3.SetValue "ABC" WriteValueArguments3.ValueTypeCode = TypeCode_String ' here is the type explicitly specified Dim arguments(2) As Variant Set arguments(0) = WriteValueArguments1 Set arguments(1) = WriteValueArguments2 Set arguments(2) = WriteValueArguments3 ' Modify values of nodes Dim results As Variant results = Client.WriteMultipleValues(arguments) ' Display results Dim i: For i = LBound(results) To UBound(results) Dim Result As UAWriteResult: Set Result = results(i) If Result.Succeeded Then OutputText = OutputText & "Result " & i & " success" & vbCrLf Else OutputText = OutputText & "Result " & i & ": " & Result.Exception.GetBaseException().Message & vbCrLf End If Next End Sub
# This example shows how to write values into 3 nodes at once, specifying a type code explicitly. It tests for success # of each write and displays the exception message in case of failure. # # Reasons for specifying the type explicitly might be: # - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. # - The data type that the reports is incorrect. # - Writing with an explicitly specified type is more efficient. # # Alternative ways of specifying the type are using the ValueType or ValueTypeFullName properties. # # Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . # OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python . # Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own # a commercial license in order to use Online Forums, and we reply to every post. # The QuickOPC package is needed. Install it using "pip install opclabs_quickopc". import opclabs_quickopc # Import .NET namespaces. from System import * from OpcLabs.EasyOpc.UA import * from OpcLabs.EasyOpc.UA.OperationModel import * endpointDescriptor = UAEndpointDescriptor('opc.tcp://opcua.demo-this.com:51210/UA/SampleServer') # or 'http://opcua.demo-this.com:51211/UA/SampleServer' (currently not supported) # or 'https://opcua.demo-this.com:51212/UA/SampleServer/' # Instantiate the client object client = EasyUAClient() print('Modifying values of nodes...') writeValueArguments1 = UAWriteValueArguments(endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10221'), 23456) writeValueArguments1.ValueTypeCode = TypeCode.Int32 # here is the type explicitly specified writeValueArguments2 = UAWriteValueArguments(endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10226'), 'This string cannot be converted to Double') writeValueArguments2.ValueTypeCode = TypeCode.Double # here is the type explicitly specified writeValueArguments3 = UAWriteValueArguments(endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;s=UnknownNode'), 'ABC') writeValueArguments3.ValueTypeCode = TypeCode.String # here is the type explicitly specified writeResultArray = IEasyUAClientExtension.WriteMultipleValues(client, [writeValueArguments1, writeValueArguments2, writeValueArguments3]) for i, writeResult in enumerate(writeResultArray): if writeResult.Succeeded: print('writeResultArray[', i, ']: success', sep='') else: print('writeResultArray[', i, '] *** Failure: ', writeResult.Exception.GetBaseException().Message, sep='') print() print('Finished.')
The example below writes multiple values, specifying the types to be written in the ValueTypeFullName property, using a string form of the .NET Type.
This approach is especially suitable in COM languages and tools, if you need to specify a type that is not covered by the TypeCode enumeration.
// This example shows how to write values into 3 nodes at once, specifying a type's full name explicitly. It tests for // success of each write and displays the exception message in case of failure. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // Alternative ways of specifying the type are using the ValueType or ValueTypeCode properties. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. using System; using OpcLabs.BaseLib.OperationModel; using OpcLabs.EasyOpc.UA; using OpcLabs.EasyOpc.UA.OperationModel; namespace UADocExamples._EasyUAClient { partial class WriteMultipleValues { public static void ValueTypeFullName() { UAEndpointDescriptor endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"; // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) // or "https://opcua.demo-this.com:51212/UA/SampleServer/" // Instantiate the client object. var client = new EasyUAClient(); Console.WriteLine("Modifying values of nodes..."); OperationResult[] operationResultArray = client.WriteMultipleValues(new[] { new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 23456) {ValueTypeFullName = "System.Int32"}, // here is the type explicitly specified new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") {ValueTypeFullName = "System.Double"}, // here is the type explicitly specified new UAWriteValueArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") {ValueTypeFullName = "System.String"} // here is the type explicitly specified }); for (int i = 0; i < operationResultArray.Length; i++) if (operationResultArray[i].Succeeded) Console.WriteLine($"Result {i}: success"); else Console.WriteLine($"Result {i}: {operationResultArray[i].Exception.GetBaseException().Message}"); } } }
# This example shows how to write values into 3 nodes at once, specifying a type's full name explicitly. It tests for # success of each write and displays the exception message in case of failure. # # Reasons for specifying the type explicitly might be: # - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. # - The data type that the reports is incorrect. # - Writing with an explicitly specified type is more efficient. # # Alternative ways of specifying the type are using the ValueType or ValueTypeCode properties. # # Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . # OPC client and subscriber examples in PowerShell on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-PowerShell . # Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own # a commercial license in order to use Online Forums, and we reply to every post. #requires -Version 5.1 using namespace OpcLabs.EasyOpc.UA using namespace OpcLabs.EasyOpc.UA.OperationModel # The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows . Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUA.dll" Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcUAComponents.dll" [UAEndpointDescriptor]$endpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" # or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) # or "https://opcua.demo-this.com:51212/UA/SampleServer/" # Instantiate the client object. $client = New-Object EasyUAClient Write-Host "Modifying values of nodes..." $operationResultArray = $client.WriteMultipleValues([UAWriteValueArguments[]]@( (New-Object UAWriteValueArguments($endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10221", 23456) ` -Property @{ValueTypeFullName = "System.Int32"}), # here is the type explicitly specified (New-Object UAWriteValueArguments($endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") ` -Property @{ValueTypeFullName = "System.Double"}), # here is the type explicitly specified (New-Object UAWriteValueArguments($endpointDescriptor, "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") ` -Property @{ValueTypeFullName = "System.String"}) # here is the type explicitly specified )) for ($i = 0; $i -lt $operationResultArray.Length; $i++) { if ($operationResultArray[$i].Succeeded) { Write-Host "Result $($i): success" } else { Write-Host "Result $($i): $($operationResultArray[$i].Exception.GetBaseException().Message)" } } # Example output: # #Modifying values of nodes... #Result 0: success #Result 1: Input string was not in a correct format. #+ Attempting to change an object of type "System.String" to type "System.Double". #+ The specified original value (string) was "This string cannot be converted to Double". #+ The node descriptor used was: NodeId="nsu=http://test.org/UA/Data/ ;i=10226". #+ The client method called (or event/callback invoked) was 'WriteMultiple[3]'. #Result 2: The status of the OPC-UA attribute data is not Good. The actual status is 'BadNodeIdUnknown'. #+ During writing or method calls, readings may occur when value type is not specified. #+ The node descriptor used was: NodeId="nsu=http://test.org/UA/Data/ ;s=UnknownNode". #+ The client method called (or event/callback invoked) was 'WriteMultiple[3]'.
' This example shows how to write values into 3 nodes at once, specifying a type's full name explicitly. It tests for ' success of each write and displays the exception message in case of failure. ' ' Reasons for specifying the type explicitly might be: ' - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. ' - The data type that the reports is incorrect. ' - Writing with an explicitly specified type is more efficient. ' ' Alternative ways of specifying the type are using the ValueType or ValueTypeCode properties. ' ' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . ' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET . ' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own ' a commercial license in order to use Online Forums, and we reply to every post. Imports System Imports OpcLabs.BaseLib.OperationModel Imports OpcLabs.EasyOpc.UA Imports OpcLabs.EasyOpc.UA.OperationModel Namespace _EasyUAClient Partial Friend Class WriteMultipleValues Public Shared Sub ValueTypeFullName() ' Define which server we will work with. Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" ' or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported) ' or "https://opcua.demo-this.com:51212/UA/SampleServer/" ' Instantiate the client object Dim client = New EasyUAClient() ' Modify value of a node Dim operationResultArray() As OperationResult = client.WriteMultipleValues(New UAWriteValueArguments() _ { _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10221", 23456) _ With {.ValueTypeFullName = "System.Int32"}, _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;i=10226", "This string cannot be converted to Double") _ With {.ValueTypeFullName = "System.Double"}, _ New UAWriteValueArguments(endpointDescriptor, _ "nsu=http://test.org/UA/Data/ ;s=UnknownNode", "ABC") _ With {.ValueTypeFullName = "System.String"} _ } _ ) For i As Integer = 0 To operationResultArray.Length - 1 If operationResultArray(i).Succeeded Then Console.WriteLine("Result {0}: success", i) Else Console.WriteLine("Result {0}: {1}", i, operationResultArray(i).Exception.GetBaseException().Message) End If Next i End Sub End Class End Namespace
REM This example shows how to write values into 3 nodes at once, specifying a type's full name explicitly. It tests for REM success of each write and displays the exception message in case of failure. REM REM Reasons for specifying the type explicitly might be: REM - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. REM - The data type that the reports is incorrect. REM - Writing with an explicitly specified type is more efficient. REM REM Alternative ways of specifying the type are using the ValueType or ValueTypeCode properties. REM REM Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . REM OPC client and subscriber examples in Visual Basic on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VB . REM Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own REM a commercial license in order to use Online Forums, and we reply to every post. Public Sub WriteMultipleValues_ValueTypeFullName_Command_Click() OutputText = "" ' Instantiate the client object Dim Client As New EasyUAClient Dim WriteValueArguments1 As New UAWriteValueArguments WriteValueArguments1.endpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" WriteValueArguments1.nodeDescriptor.NodeId.expandedText = "nsu=http://test.org/UA/Data/ ;i=10221" WriteValueArguments1.SetValue 23456 WriteValueArguments1.ValueTypeFullName = "System.Int32" ' here is the type explicitly specified Dim WriteValueArguments2 As New UAWriteValueArguments WriteValueArguments2.endpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" WriteValueArguments2.nodeDescriptor.NodeId.expandedText = "nsu=http://test.org/UA/Data/ ;i=10226" WriteValueArguments2.SetValue "This string cannot be converted to Double" WriteValueArguments2.ValueTypeFullName = "System.Double" ' here is the type explicitly specified Dim WriteValueArguments3 As New UAWriteValueArguments WriteValueArguments3.endpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer" WriteValueArguments3.nodeDescriptor.NodeId.expandedText = "nsu=http://test.org/UA/Data/ ;s=UnknownNode" WriteValueArguments3.SetValue "ABC" WriteValueArguments3.ValueTypeFullName = "System.String" ' here is the type explicitly specified Dim arguments(2) As Variant Set arguments(0) = WriteValueArguments1 Set arguments(1) = WriteValueArguments2 Set arguments(2) = WriteValueArguments3 ' Modify values of nodes Dim results As Variant results = Client.WriteMultipleValues(arguments) ' Display results Dim i: For i = LBound(results) To UBound(results) Dim Result As UAWriteResult: Set Result = results(i) If Result.Succeeded Then OutputText = OutputText & "Result " & i & " success" & vbCrLf Else OutputText = OutputText & "Result " & i & ": " & Result.Exception.GetBaseException().Message & vbCrLf End If Next End Sub
// This example shows how to write values into 3 nodes at once, specifying a type's full name explicitly. It tests for // success of each write and displays the exception message in case of failure. // // Reasons for specifying the type explicitly might be: // - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. // - The data type that the reports is incorrect. // - Writing with an explicitly specified type is more efficient. // // Alternative ways of specifying the type are using the ValueType or ValueTypeCode properties. // // Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . // OPC client and subscriber examples in Object Pascal (Delphi) on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-OP . // Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own // a commercial license in order to use Online Forums, and we reply to every post. class procedure WriteMultipleValues.ValueTypeFullName; var Arguments: OleVariant; Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient; I: Cardinal; WriteResult: _UAWriteResult; WriteValueArguments1, WriteValueArguments2, WriteValueArguments3: _UAWriteValueArguments; Results: OleVariant; begin WriteValueArguments1 := CoUAWriteValueArguments.Create; WriteValueArguments1.EndpointDescriptor.UrlString := //'http://opcua.demo-this.com:51211/UA/SampleServer'; //'https://opcua.demo-this.com:51212/UA/SampleServer/'; 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'; WriteValueArguments1.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/ ;i=10221'; WriteValueArguments1.Value := 23456; WriteValueArguments1.ValueTypeFullName := 'System.Int32'; // here is the type explicitly specified WriteValueArguments2 := CoUAWriteValueArguments.Create; WriteValueArguments2.EndpointDescriptor.UrlString := //'http://opcua.demo-this.com:51211/UA/SampleServer'; //'https://opcua.demo-this.com:51212/UA/SampleServer/'; 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'; WriteValueArguments2.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/ ;i=10226'; WriteValueArguments2.Value := 'This string cannot be converted to Double'; WriteValueArguments2.ValueTypeFullName := 'System.Double'; // here is the type explicitly specified WriteValueArguments3 := CoUAWriteValueArguments.Create; WriteValueArguments3.EndpointDescriptor.UrlString := //'http://opcua.demo-this.com:51211/UA/SampleServer'; //'https://opcua.demo-this.com:51212/UA/SampleServer/'; 'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'; WriteValueArguments3.NodeDescriptor.NodeId.ExpandedText := 'nsu=http://test.org/UA/Data/ ;s=UnknownNode'; WriteValueArguments3.Value := 'ABC'; WriteValueArguments3.ValueTypeFullName := 'System.String'; // here is the type explicitly specified Arguments := VarArrayCreate([0, 2], varVariant); Arguments[0] := WriteValueArguments1; Arguments[1] := WriteValueArguments2; Arguments[2] := WriteValueArguments3; // Instantiate the client object Client := CoEasyUAClient.Create; // Modify values of nodes TVarData(Results).VType := varArray or varVariant; TVarData(Results).VArray := PVarArray(Client.WriteMultipleValues(Arguments)); // Display results for I := VarArrayLowBound(Results, 1) to VarArrayHighBound(Results, 1) do begin WriteResult := IInterface(Results[I]) as _UAWriteResult; if WriteResult.Succeeded then WriteLn('Result ', I, ' success') else WriteLn('Result ', I, ': ', WriteResult.Exception.GetBaseException.Message); end; VarClear(Results); VarClear(Arguments); end;
# This example shows how to write values into 3 nodes at once, specifying a type's full name explicitly. It tests for # success of each write and displays the exception message in case of failure. # # Reasons for specifying the type explicitly might be: # - The data type in the server has subtypes, and the client therefore needs to pick the subtype to be written. # - The data type that the reports is incorrect. # - Writing with an explicitly specified type is more efficient. # # Alternative ways of specifying the type are using the ValueType or ValueTypeCode properties. # # Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html . # OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python . # Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own # a commercial license in order to use Online Forums, and we reply to every post. # The QuickOPC package is needed. Install it using "pip install opclabs_quickopc". import opclabs_quickopc # Import .NET namespaces. from OpcLabs.EasyOpc.UA import * from OpcLabs.EasyOpc.UA.OperationModel import * endpointDescriptor = UAEndpointDescriptor('opc.tcp://opcua.demo-this.com:51210/UA/SampleServer') # or 'http://opcua.demo-this.com:51211/UA/SampleServer' (currently not supported) # or 'https://opcua.demo-this.com:51212/UA/SampleServer/' # Instantiate the client object client = EasyUAClient() print('Modifying values of nodes...') writeValueArguments1 = UAWriteValueArguments(endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10221'), 23456) writeValueArguments1.ValueTypeFullName = 'System.Int32' # here is the type explicitly specified writeValueArguments2 = UAWriteValueArguments(endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10226'), 'This string cannot be converted to Double') writeValueArguments2.ValueTypeFullName = 'System.Double' # here is the type explicitly specified writeValueArguments3 = UAWriteValueArguments(endpointDescriptor, UANodeDescriptor('nsu=http://test.org/UA/Data/ ;s=UnknownNode'), 'ABC') writeValueArguments3.ValueTypeFullName = 'System.String' # here is the type explicitly specified writeResultArray = IEasyUAClientExtension.WriteMultipleValues(client, [writeValueArguments1, writeValueArguments2, writeValueArguments3]) for i, writeResult in enumerate(writeResultArray): if writeResult.Succeeded: print('writeResultArray[', i, ']: success', sep='') else: print('writeResultArray[', i, '] *** Failure: ', writeResult.Exception.GetBaseException().Message, sep='') print() print('Finished.')
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