// This example shows how to set fairly short OPC UA timeouts (failures can thus occur).
//
// 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;
namespace UADocExamples._UAClientSessionParameters
{
class Timeouts
{
public static void Isolated()
{
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 and set timeouts
var client = new EasyUAClient
{
Isolated = true,
IsolatedParameters =
{
SessionParameters =
{
EndpointSelectionTimeout = 1500,
SessionConnectTimeout = 3000,
SessionTimeout = 3000,
SessionTimeoutDebug = 3000
}
}
};
Console.WriteLine("Subscribing...");
// The callback is a lambda expression the displays the value
client.SubscribeDataChange(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853", 1000,
(sender, eventArgs) =>
{
if (eventArgs.Succeeded)
Console.WriteLine("Value: {0}", eventArgs.AttributeData.Value);
else
Console.WriteLine("*** Failure: {0}", eventArgs.ErrorMessageBrief);
});
Console.WriteLine("Processing data change events for 10 seconds...");
System.Threading.Thread.Sleep(10 * 1000);
Console.WriteLine("Unsubscribing...");
client.UnsubscribeAllMonitoredItems();
Console.WriteLine("Waiting for 2 seconds...");
System.Threading.Thread.Sleep(2 * 1000);
}
}
}
' This example shows how to set fairly short OPC UA timeouts (failures can thus occur).
'
' 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
Namespace _UAClientSessionParameters
Partial Friend Class Timeouts
Public Shared Sub Isolated()
' 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 and set timeouts
Dim client = New EasyUAClient() With
{
.Isolated = True,
.IsolatedParameters = New Engine.EasyUAClientAdaptableParameters() With
{
.SessionParameters = New Engine.UASmartClientSessionParameters() With
{
.EndpointSelectionTimeout = 1500,
.SessionConnectTimeout = 3000,
.SessionTimeout = 3000,
.SessionTimeoutDebug = 3000
}
}
}
Console.WriteLine("Subscribing...")
' The callback is a lambda expression the displays the value
client.SubscribeDataChange(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853", 1000,
Sub(sender, eventArgs)
If eventArgs.Succeeded Then
Console.WriteLine("Value: {0}", eventArgs.AttributeData.Value)
Else
Console.WriteLine("*** Failure: {0}", eventArgs.ErrorMessageBrief)
End If
End Sub)
Console.WriteLine("Processing data change events for 10 seconds...")
Threading.Thread.Sleep(10 * 1000)
Console.WriteLine("Unsubscribing...")
client.UnsubscribeAllMonitoredItems()
Console.WriteLine("Waiting for 2 seconds...")
Threading.Thread.Sleep(2 * 1000)
End Sub
End Class
End Namespace
# This example shows how to set fairly short OPC UA timeouts (failures can thus occur).
#
# 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 time
# Import .NET namespaces.
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.OperationModel import *
def dataChangeNotification(sender, eventArgs):
# Display value.
if eventArgs.Succeeded:
print('Value: ', eventArgs.AttributeData.Value, sep='')
else:
print('*** Failure: ', eventArgs.ErrorMessageBrief, sep='')
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 and set timeouts.
client = EasyUAClient()
client.Isolated = True
client.IsolatedParameters.SessionParameters.EndpointSelectionTimeout = 1500
client.IsolatedParameters.SessionParameters.SessionConnectTimeout = 3000
client.IsolatedParameters.SessionParameters.SessionTimeout = 3000
client.IsolatedParameters.SessionParameters.SessionTimeoutDebug = 3000
print('Subscribing...')
IEasyUAClientExtension.SubscribeDataChange(client,
endpointDescriptor,
UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10853'),
1000,
EasyUADataChangeNotificationEventHandler(dataChangeNotification))
print('Processing data change events for 10 seconds...')
time.sleep(10)
print('Unsubscribing...')
client.UnsubscribeAllMonitoredItems()
print('Waiting for 2 seconds...')
time.sleep(2)
print('Finished.')
