// This example shows how to subscribe to changes of a single monitored item, pull events, and display each change.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// 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.
var Client = new ActiveXObject("OpcLabs.EasyOpc.UA.EasyUAClient");
// In order to use event pull, you must set a non-zero queue capacity upfront.
Client.PullDataChangeNotificationQueueCapacity = 1000;
WScript.Echo("Subscribing...");
Client.SubscribeDataChange(
//"http://opcua.demo-this.com:51211/UA/SampleServer",
"opc.tcp://opcua.demo-this.com:51210/UA/SampleServer",
"nsu=http://test.org/UA/Data/ ;i=10853", 1000);
WScript.Echo("Processing data change events for 1 minute...");
var endTime = new Date().getTime() + 60*1000
do {
var EventArgs = Client.PullDataChangeNotification(2*1000);
if (EventArgs !== null) {
// Handle the notification event
WScript.Echo(EventArgs);
}
} while(new Date().getTime() < endTime);
// This example shows how to subscribe to changes of a single monitored item, pull events, and display each change.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// 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 PullDataChangeNotification.Main;
var
Client: EasyUAClient;
EndTick: Cardinal;
EventArgs: _EasyUADataChangeNotificationEventArgs;
begin
// Instantiate the client object
Client := CoEasyUAClient.Create;
// In order to use event pull, you must set a non-zero queue capacity upfront.
Client.PullDataChangeNotificationQueueCapacity := 1000;
WriteLn('Subscribing...');
Client.SubscribeDataChange(
//'http://opcua.demo-this.com:51211/UA/SampleServer',
'opc.tcp://opcua.demo-this.com:51210/UA/SampleServer',
'nsu=http://test.org/UA/Data/ ;i=10853',
1000);
WriteLn('Processing data change events for 1 minute...');
EndTick := GetTickCount + 60*1000;
while GetTickCount < EndTick do
begin
EventArgs := Client.PullDataChangeNotification(2*1000);
if EventArgs <> nil then
// Handle the notification event
WriteLn(EventArgs.ToString);
end;
WriteLn('Unsubscribing...');
Client.UnsubscribeAllMonitoredItems;
WriteLn('Finished.');
end;
// This example shows how to subscribe to changes of a single monitored item, pull events, and display each change.
//
// 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 PullDataChangeNotification.Main;
var
Client: OpcLabs_EasyOpcUA_TLB._EasyUAClient;
EndTick: Cardinal;
EventArgs: _EasyUADataChangeNotificationEventArgs;
begin
// Instantiate the client object
Client := CoEasyUAClient.Create;
// In order to use event pull, you must set a non-zero queue capacity upfront.
Client.PullDataChangeNotificationQueueCapacity := 1000;
WriteLn('Subscribing...');
Client.SubscribeDataChange(
//'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',
'nsu=http://test.org/UA/Data/ ;i=10853',
1000);
WriteLn('Processing data change events for 1 minute...');
EndTick := Ticks + 60*1000;
while Ticks < EndTick do
begin
EventArgs := Client.PullDataChangeNotification(2*1000);
if EventArgs <> nil then
// Handle the notification event
WriteLn(EventArgs.ToString);
end;
WriteLn('Unsubscribing...');
Client.UnsubscribeAllMonitoredItems;
WriteLn('Finished.');
end;
// This example shows how to subscribe to changes of a single monitored item, pull events, and display each change.
mle_outputtext.Text = ""
// Instantiate the client object
OLEObject client
client = CREATE OLEObject
client.ConnectToNewObject("OpcLabs.EasyOpc.UA.EasyUAClient")
// In order to use event pull, you must set a non-zero queue capacity upfront.
client.PullDataChangeNotificationQueueCapacity = 1000
mle_outputtext.Text = mle_outputtext.Text + "Subscribing data changes..." + "~r~n"
client.SubscribeDataChange("http://opcua.demo-this.com:51211/UA/SampleServer", "nsu=http://test.org/UA/Data/ ;i=10853", 1000)
mle_outputtext.Text = mle_outputtext.Text + "Processing data change events for 1 minute..." + "~r~n"
Time endTime = RelativeTime(Now(), 60)
DO
OLEObject eventArgs
eventArgs = client.PullDataChangeNotification(2*1000)
IF NOT IsNull(eventArgs) THEN
// Handle the notification event
mle_outputtext.Text = mle_outputtext.Text + eventArgs.DisplayString + "~r~n"
END IF
LOOP WHILE Now() < endTime
mle_outputtext.Text = mle_outputtext.Text + "~r~n"
mle_outputtext.Text = mle_outputtext.Text + "Finished." + "~r~n"
REM This example shows how to subscribe to changes of a single monitored item, pull events, and display each change.
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 PullDataChangeNotification_Main_Command_Click()
OutputText = ""
Dim eventArgs As EasyUADataChangeNotificationEventArgs
' Instantiate the client object
Dim Client As New EasyUAClient
' In order to use event pull, you must set a non-zero queue capacity upfront.
Client.PullDataChangeNotificationQueueCapacity = 1000
OutputText = OutputText & "Subscribing..." & vbCrLf
Call Client.SubscribeDataChange("opc.tcp://opcua.demo-this.com:51210/UA/SampleServer", "nsu=http://test.org/UA/Data/ ;i=10853", 1000)
OutputText = OutputText & "Processing data changed notification events for 1 minute..." & vbCrLf
Dim EndTick As Long
EndTick = GetTickCount + 60000
While GetTickCount < EndTick
Set eventArgs = Client.PullDataChangeNotification(2 * 1000)
If Not eventArgs Is Nothing Then
' Handle the notification event
OutputText = OutputText & eventArgs & vbCrLf
End If
Wend
OutputText = OutputText & "Unsubscribing..." & vbCrLf
Client.UnsubscribeAllMonitoredItems
OutputText = OutputText & "Finished." & vbCrLf
End Sub
Rem This example shows how to subscribe to changes of a single monitored item, pull events, and display each change.
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
' Instantiate the client object
Dim Client: Set Client = CreateObject("OpcLabs.EasyOpc.UA.EasyUAClient")
' In order to use event pull, you must set a non-zero queue capacity upfront.
Client.PullDataChangeNotificationQueueCapacity = 1000
WScript.Echo "Subscribing..."
Client.SubscribeDataChange "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer", "nsu=http://test.org/UA/Data/ ;i=10853", 1000
WScript.Echo "Processing data change events for 1 minute..."
Dim endTime: endTime = Now() + 60*(1/24/60/60)
Do
Dim EventArgs: Set EventArgs = Client.PullDataChangeNotification(2*1000)
If Not (EventArgs Is Nothing) Then
' Handle the notification event
WScript.Echo EventArgs
End If
Loop While Now() < endTime
// This example shows how to subscribe to changes of a single monitored item, pull events, and display each change.
//
// 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.
$Client = new COM("OpcLabs.EasyOpc.UA.EasyUAClient");
// In order to use event pull, you must set a non-zero queue capacity upfront.
$Client->PullDataChangeNotificationQueueCapacity = 1000;
print "Subscribing...\n";
$Client->SubscribeDataChange(
//"http://opcua.demo-this.com:51211/UA/SampleServer",
"opc.tcp://opcua.demo-this.com:51210/UA/SampleServer",
"nsu=http://test.org/UA/Data/ ;i=10853",
1000);
print "Processing data change events for 1 minute...\n";
$endTime = time() + 60;
do {
$EventArgs = $Client->PullDataChangeNotification(2*1000);
if (!is_null($EventArgs)) {
// Handle the notification event
print $EventArgs->ToString();
print "\n";
}
} while (time() < $endTime);
