OPC UA and .NET integration

Hello all,

I am using Siemens Simatic .NET V13 for OPC communications.

Following the sample that Siemens gives for a .NET client application everything works fine but afer a while the asyncronous communications fail, .

The ClientApi_ValueChanged() is not launched when some change rises on the subscribed tags.

Has anybody faced this problem?

Thank you,

Regards.

Hello umiguelc

Which PLC do you use with Simatic Net OPC Server?

What happens if you use the OPC Scout of Simatic Net parallel to the C Client you use? Can you see the same issues in OPC Scout?

Bye Murof

I am using different 1500 PLC configurations.

There is no problem with the communications with opc scout or our c# client if we read the variables in a syncronous way, the problem is related to the events after a subscription.