// This example shows how to set fairly short OPC UA timeouts (failures can thus occur).
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).
# 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.')
