Concepts > QuickOPC Concepts > QuickOPC Development Models > Imperative Programming Model > Imperative Programming Model for OPC Data (Classic and UA) > Modifying Information (OPC Data) > Writing to OPC Classic Items > Writing value, timestamp and quality (OPC Classic) |
Some newer OPC servers allow a combination of value, timestamp, and quality (VTQ) be written into their items.
If you need to do this, call WriteItem or WriteMultipleItems method.
// This example shows how to write a value, timestamp and quality into a single item. // // 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.DataAccess; using OpcLabs.EasyOpc.OperationModel; namespace DocExamples.DataAccess._EasyDAClient { class WriteItem { public static void Main1() { // Instantiate the client object. var client = new EasyDAClient(); try { client.WriteItem("", "OPCLabs.KitServer.2", "Simulation.Register_I4", 12345, DateTime.SpecifyKind(new DateTime(1980, 1, 1), DateTimeKind.Utc), 192); } catch (OpcException opcException) { Console.WriteLine($"*** Failure: {opcException.GetBaseException().Message}"); return; } Console.WriteLine("Success"); } } }
# This example shows how to write a value, timestamp and quality into a single item. # # 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 System using namespace OpcLabs.EasyOpc.DataAccess using namespace OpcLabs.EasyOpc.OperationModel # The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows . Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassicCore.dll" Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassic.dll" Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassicComponents.dll" # Instantiate the client object. $client = New-Object EasyDAClient try { [IEasyDAClientExtension]::WriteItem($client, "", "OPCLabs.KitServer.2", "Simulation.Register_I4", 12345, [DateTime]::SpecifyKind((New-Object DateTime(1980, 1, 1)), [DateTimeKind]::Utc), 192) } catch [OpcException] { Write-Host "*** Failure: $($PSItem.Exception.GetBaseException().Message)" return } Write-Host "Success"
' This example shows how to write a value, timestamp and quality into a single item. ' ' 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.DataAccess Imports OpcLabs.EasyOpc.OperationModel Namespace DataAccess._EasyDAClient Partial Friend Class WriteItem Public Shared Sub Main1() ' Instantiate the client object. Dim client = New EasyDAClient() Try client.WriteItem("", "OPCLabs.KitServer.2", "Simulation.Register_I4", 12345, DateTime.SpecifyKind(New DateTime(1980, 1, 1), DateTimeKind.Utc), 192) Catch opcException As OpcException Console.WriteLine("*** Failure: {0}", opcException.GetBaseException().Message) Exit Sub End Try Console.WriteLine("Success") End Sub End Class End Namespace
// This example shows how to write a value, timestamp and quality into a single item. // // 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 WriteItem.Main; var Client: OpcLabs_EasyOpcClassic_TLB._EasyDAClient; begin // Instantiate the client object Client := CoEasyDAClient.Create; try Client.WriteItem('', 'OPCLabs.KitServer.2', 'Simulation.Register_I4', 12345, EncodeDate(1980, 1, 1), DAQualities_GoodNonSpecific); except on E: EOleException do begin WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message])); Exit; end; end; end;
REM This example shows how to write a value, timestamp and quality into a single item. 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. Private Sub WriteItem_Main_Command_Click() OutputText = "" ' Instantiate the client object Dim client As New EasyDAClient On Error Resume Next Call client.WriteItem("", "OPCLabs.KitServer.2", "Simulation.Register_I4", 12345, DateSerial(1980, 1, 1), DAQualities_GoodNonspecific) If Err.Number <> 0 Then OutputText = OutputText & "*** Failure: " & Err.Source & ": " & Err.Description & vbCrLf Exit Sub End If On Error GoTo 0 End Sub
Rem This example shows how to write a value, timestamp and quality into a single item. 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 Dim Client: Set Client = CreateObject("OpcLabs.EasyOpc.DataAccess.EasyDAClient") On Error Resume Next Client.WriteItem "", "OPCLabs.KitServer.2", "Simulation.Register_I4", 12345, DateSerial(1980, 1, 1), 192 If Err.Number <> 0 Then WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description WScript.Quit End If On Error Goto 0
# This example shows how to write a value, timestamp and quality into a single item. # # 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.DataAccess import * from OpcLabs.EasyOpc.OperationModel import * # Instantiate the client object. client = EasyDAClient() # Perform the operation try: IEasyDAClientExtension.WriteItem(client, '', 'OPCLabs.KitServer.2', 'Simulation.Register_I4', 12345, DateTime.SpecifyKind(DateTime(1980, 1, 1), DateTimeKind.Utc), DAQuality(192)) except OpcException as opcException: print('*** Failure: ' + opcException.GetBaseException().Message, sep='') exit() print('Finished.')
// This example shows how to write values, timestamps and qualities into 3 items at once. // // 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 System.Diagnostics; using OpcLabs.BaseLib.OperationModel; using OpcLabs.EasyOpc.DataAccess; using OpcLabs.EasyOpc.DataAccess.OperationModel; namespace DocExamples.DataAccess._EasyDAClient { class WriteMultipleItems { public static void Main1() { // Instantiate the client object. var client = new EasyDAClient(); Console.WriteLine("Writing multiple items..."); OperationResult[] resultArray = client.WriteMultipleItems( new[] { new DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_I4", new DAVtq(23456, DateTime.UtcNow, DAQualities.GoodNonspecific)), new DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_R8", new DAVtq(2.34567890, DateTime.UtcNow, DAQualities.GoodNonspecific)), new DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_BSTR", new DAVtq("ABC", DateTime.UtcNow, DAQualities.GoodNonspecific)) }); for (int i = 0; i < resultArray.Length; i++) { Debug.Assert(resultArray[i] != null); if (resultArray[i].Succeeded) Console.WriteLine("Result {0}: success", i); else { Debug.Assert(!(resultArray[i].Exception is null)); Console.WriteLine("Result {0} *** Failure: {1}", i, resultArray[i].ErrorMessageBrief); } } } } }
# This example shows how to write values, timestamps and qualities into 3 items at once. # # 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 System using namespace OpcLabs.EasyOpc.DataAccess using namespace OpcLabs.EasyOpc.DataAccess.OperationModel # The path below assumes that the current directory is [ProductDir]/Examples-NET/PowerShell/Windows . Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassicCore.dll" Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassic.dll" Add-Type -Path "../../../Components/Opclabs.QuickOpc/net472/OpcLabs.EasyOpcClassicComponents.dll" # Instantiate the client object. $client = New-Object EasyDAClient Write-Host "Writing multiple items..." $resultArray = $client.WriteMultipleItems(@( (New-Object DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_I4", (New-Object DAVtq(23456, [DateTime]::UtcNow, [DAQualities]::GoodNonspecific)))), (New-Object DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_R8", (New-Object DAVtq(2.345667890, [DateTime]::UtcNow, [DAQualities]::GoodNonspecific)))), (New-Object DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_BSTR", (New-Object DAVtq("ABC", [DateTime]::UtcNow, [DAQualities]::GoodNonspecific)))) )) for ($i = 0; $i -lt $resultArray.Length; $i++) { $result = $resultArray[$i] if ($result.Succeeded) { Write-Host "Result $($i): success" } else { Write-Host "Result $($i) *** Failure: $($result.ErrorMessageBrief)" } }
' This example shows how to write values, timestamps and qualities into 3 items at once. ' ' 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.BaseLib.OperationModel Imports OpcLabs.EasyOpc.DataAccess Imports OpcLabs.EasyOpc.DataAccess.OperationModel Namespace DataAccess._EasyDAClient Partial Friend Class WriteMultipleItems Public Shared Sub Main1() ' Instantiate the client object. Dim client = New EasyDAClient() Console.WriteLine("Writing multiple items...") Dim resultArray() As OperationResult = client.WriteMultipleItems(New DAItemVtqArguments() { New DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_I4", New DAVtq(23456, DateTime.UtcNow, DAQualities.GoodNonspecific)), New DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_R8", New DAVtq(2.3456789, DateTime.UtcNow, DAQualities.GoodNonspecific)), New DAItemVtqArguments("OPCLabs.KitServer.2", "Simulation.Register_BSTR", New DAVtq("ABC", DateTime.UtcNow, DAQualities.GoodNonspecific)) }) For i = 0 To resultArray.Length - 1 Debug.Assert(resultArray(i) IsNot Nothing) If resultArray(i).Succeeded Then Console.WriteLine("Result {0}: success", i) Else Debug.Assert(resultArray(i).Exception IsNot Nothing) Console.WriteLine("Result {0} *** Failure: {1}", i, resultArray(i).ErrorMessageBrief) End If Next i End Sub End Class End Namespace
// This example shows how to write values, timestamps and qualities into 3 items at once. // // 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 WriteMultipleItems.Main; var Arguments: OleVariant; Client: OpcLabs_EasyOpcClassic_TLB._EasyDAClient; I: Cardinal; ItemVtqArguments1: _DAItemVtqArguments; ItemVtqArguments2: _DAItemVtqArguments; ItemVtqArguments3: _DAItemVtqArguments; Results: OleVariant; OperationResult: _OperationResult; begin ItemVtqArguments1 := CoDAItemVtqArguments.Create; ItemVtqArguments1.ServerDescriptor.ServerClass := 'OPCLabs.KitServer.2'; ItemVtqArguments1.ItemDescriptor.ItemID := 'Simulation.Register_I4'; ItemVtqArguments1.Vtq.Value := 23456; ItemVtqArguments1.Vtq.TimestampLocal := Now(); ItemVtqArguments1.Vtq.Quality.NumericalValue := DAQualities_GoodNonSpecific; ItemVtqArguments2 := CoDAItemVtqArguments.Create; ItemVtqArguments2.ServerDescriptor.ServerClass := 'OPCLabs.KitServer.2'; ItemVtqArguments2.ItemDescriptor.ItemID := 'Simulation.Register_R8'; ItemVtqArguments2.Vtq.Value := 2.34567890; ItemVtqArguments2.Vtq.TimestampLocal := Now(); ItemVtqArguments2.Vtq.Quality.NumericalValue := DAQualities_GoodNonSpecific; ItemVtqArguments3 := CoDAItemVtqArguments.Create; ItemVtqArguments3.ServerDescriptor.ServerClass := 'OPCLabs.KitServer.2'; ItemVtqArguments3.ItemDescriptor.ItemID := 'Simulation.Register_BSTR'; ItemVtqArguments3.Vtq.Value := 'ABC'; ItemVtqArguments3.Vtq.TimestampLocal := Now(); ItemVtqArguments3.Vtq.Quality.NumericalValue := DAQualities_GoodNonSpecific; Arguments := VarArrayCreate([0, 2], varVariant); Arguments[0] := ItemVtqArguments1; Arguments[1] := ItemVtqArguments2; Arguments[2] := ItemVtqArguments3; // Instantiate the client object Client := CoEasyDAClient.Create; // Modify values of nodes TVarData(Results).VType := varArray or varVariant; TVarData(Results).VArray := PVarArray( Client.WriteMultipleItems(Arguments)); // Display results for I := VarArrayLowBound(Results, 1) to VarArrayHighBound(Results, 1) do begin OperationResult := IInterface(Results[I]) as _OperationResult; if OperationResult.Succeeded then WriteLn('Result ', I, ' success') else WriteLn('Result ', I, ' *** Failure: ', OperationResult.Exception.GetBaseException.Message); end; VarClear(Results); VarClear(Arguments); end;
REM This example shows how to write values, timestamps and qualities into 3 items at once. 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. Private Sub WriteMultipleItems_Main_Command_Click() OutputText = "" Dim itemVtqArguments1 As New DAItemVtqArguments itemVtqArguments1.serverDescriptor.ServerClass = "OPCLabs.KitServer.2" itemVtqArguments1.ItemDescriptor.itemId = "Simulation.Register_I4" itemVtqArguments1.vtq.SetValue 23456 itemVtqArguments1.vtq.TimestampLocal = Now() itemVtqArguments1.vtq.Quality.NumericalValue = DAQualities_GoodNonspecific Dim itemVtqArguments2 As New DAItemVtqArguments itemVtqArguments2.serverDescriptor.ServerClass = "OPCLabs.KitServer.2" itemVtqArguments2.ItemDescriptor.itemId = "Simulation.Register_R8" itemVtqArguments2.vtq.SetValue 2.3456789 itemVtqArguments2.vtq.TimestampLocal = Now() itemVtqArguments2.vtq.Quality.NumericalValue = DAQualities_GoodNonspecific Dim itemVtqArguments3 As New DAItemVtqArguments itemVtqArguments3.serverDescriptor.ServerClass = "OPCLabs.KitServer.2" itemVtqArguments3.ItemDescriptor.itemId = "Simulation.Register_BSTR" itemVtqArguments3.vtq.SetValue "ABC" itemVtqArguments3.vtq.TimestampLocal = Now() itemVtqArguments3.vtq.Quality.NumericalValue = DAQualities_GoodNonspecific Dim arguments(2) As Variant Set arguments(0) = itemVtqArguments1 Set arguments(1) = itemVtqArguments2 Set arguments(2) = itemVtqArguments3 ' Instantiate the client object Dim client As New EasyDAClient ' Modify values of nodes Dim results() As Variant results = client.WriteMultipleItems(arguments) ' Display results Dim i: For i = LBound(results) To UBound(results) Dim operationResult As operationResult: Set operationResult = results(i) If operationResult.Succeeded Then OutputText = OutputText & "result " & i & " success" & vbCrLf Else OutputText = OutputText & "result " & i & " *** Failure: " & operationResult.ErrorMessageBrief & vbCrLf End If Next End Sub
Rem This example shows how to write values, timestamps and qualities into 3 items at once. 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 Dim ItemVtqArguments1: Set ItemVtqArguments1 = CreateObject("OpcLabs.EasyOpc.DataAccess.OperationModel.DAItemVtqArguments") ItemVtqArguments1.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2" ItemVtqArguments1.ItemDescriptor.ItemID = "Simulation.Register_I4" ItemVtqArguments1.Vtq.Value = 23456 ItemVtqArguments1.Vtq.TimestampLocal = Now() ItemVtqArguments1.Vtq.Quality.NumericalValue = 192 Dim ItemVtqArguments2: Set ItemVtqArguments2 = CreateObject("OpcLabs.EasyOpc.DataAccess.OperationModel.DAItemVtqArguments") ItemVtqArguments2.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2" ItemVtqArguments2.ItemDescriptor.ItemID = "Simulation.Register_R8" ItemVtqArguments2.Vtq.Value = 2.34567890 ItemVtqArguments2.Vtq.TimestampLocal = Now() ItemVtqArguments2.Vtq.Quality.NumericalValue = 192 Dim ItemVtqArguments3: Set ItemVtqArguments3 = CreateObject("OpcLabs.EasyOpc.DataAccess.OperationModel.DAItemVtqArguments") ItemVtqArguments3.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2" ItemVtqArguments3.ItemDescriptor.ItemID = "Simulation.Register_BSTR" ItemVtqArguments3.Vtq.Value = "ABC" ItemVtqArguments3.Vtq.TimestampLocal = Now() ItemVtqArguments3.Vtq.Quality.NumericalValue = 192 Dim arguments(2) Set arguments(0) = ItemVtqArguments1 Set arguments(1) = ItemVtqArguments2 Set arguments(2) = ItemVtqArguments3 Dim Client: Set Client = CreateObject("OpcLabs.EasyOpc.DataAccess.EasyDAClient") Dim results: results = Client.WriteMultipleItems(arguments) Dim i: For i = LBound(results) To UBound(results) Dim OperationResult: Set OperationResult = results(i) If OperationResult.Succeeded Then WScript.Echo "Result " & i & ": success" Else WScript.Echo "Result " & i & ": " & OperationResult.Exception.GetBaseException.Message End If Next
# This example shows how to write values, timestamps and qualities into 3 items at once. # # 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 import * from OpcLabs.EasyOpc.DataAccess import * from OpcLabs.EasyOpc.DataAccess.OperationModel import * from OpcLabs.EasyOpc.OperationModel import * # Instantiate the client object. client = EasyDAClient() print('Writing multiple items...') operationResultArray = client.WriteMultipleItems([ DAItemVtqArguments(ServerDescriptor('OPCLabs.KitServer.2'), DAItemDescriptor('Simulation.Register_I4'), DAVtq(23456, DateTime.UtcNow, DAQuality(DAQualities.GoodNonspecific))), DAItemVtqArguments(ServerDescriptor('OPCLabs.KitServer.2'), DAItemDescriptor('Simulation.Register_R8'), DAVtq(2.34567890, DateTime.UtcNow, DAQuality(DAQualities.GoodNonspecific))), DAItemVtqArguments(ServerDescriptor('OPCLabs.KitServer.2'), DAItemDescriptor('Simulation.Register_BSTR'), DAVtq('ABC', DateTime.UtcNow, DAQuality(DAQualities.GoodNonspecific))), ]) for i, operationResult in enumerate(operationResultArray): assert operationResult is not None if operationResult.Succeeded: print('operationResultArray[', i, ']: success', sep='') else: assert operationResult.Exception is not None print('operationResultArray[', i, '] *** Failure: ', operationResult.ErrorMessageBrief, sep='') print('Finished.')
You can also specify the requested data type when writing the value, timestamp and quality. See Data Type in OPC Classic Write.
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