TcAdsClient.AddDeviceNotificationEx Method (String, AdsTransMode, TimeSpan, TimeSpan, Object, Type)

C#

public int AddDeviceNotificationEx(
    string variableName,
    AdsTransMode transMode,
    TimeSpan cycleTime,
    TimeSpan maxDelay,
    Object userData,
    Type type
)

VB

Public Function AddDeviceNotificationEx ( 
    variableName As String,
    transMode As AdsTransMode,
    cycleTime As TimeSpan,
    maxDelay As TimeSpan,
    userData As Object,
    type As Type
) As Integer

Parameters

Return Value

Type: Int32
The handle of the notification.

Exceptions

Examples

The following sample shows how to use AdsNotificationEx events.

Receive AdsNotifications

//AdsStream readStream = new AdsStream(sizeof(UInt32));

private void ReceiveNotifications()
{
    using (TcAdsClient client = new TcAdsClient())
    {
    // Add the Notification event 'Ex' handler
    client.AdsNotificationEx += Client_AdsNotification;

    // Connect to target
    client.Connect(AmsNetId.Local, 851);
    int notificationHandle = 0;

    try
    {
        // Notification to a ZDINT Type (UINT32)
        // Check for change every 200 ms
        notificationHandle = client.AddDeviceNotificationEx("MAIN.nCounter",AdsTransMode.OnChange, 200, 0, null,typeof(uint));
        Thread.Sleep(5000); // Sleep the main thread to get some (asynchronous Notifications)
    }
    finally
    {
        // Unregister the Event / Handle
        client.DeleteDeviceNotification(notificationHandle);
        client.AdsNotificationEx -= Client_AdsNotification;
    }
    }
}

private void Client_AdsNotification(object sender, AdsNotificationExEventArgs e)
{
    // Or here we know about UDINT type --> can be marshalled as UINT32
    uint nCounter = (uint)e.Value;
}

Reference

TcAdsClient Class

AddDeviceNotificationEx Overload

TwinCAT.Ads Namespace

TcAdsClient.DeleteDeviceNotification(Int32)

TcAdsClient.AdsNotification

TcAdsClient.AdsNotificationEx