Sent: Wednesday, April 18, 2018 5:48 PM
Subject: EasyOpcUaDemo - no branches or leaves
We are currently using a modified version of your code-sample “EasyOpcUaDemo” (2017) which differs from the original just by having username and password hardcoded, since the OPC server requires authentication.
After entering the correct Server Uri (opc.tcp://192.168.130.31:4840), I press the “Browse data…” button and the attached screenshot is shown; apparently we are connected to the server, but we are unable to see any branches/leaves.
The OPC Server is hosted on a Siemens Sinumerik 840D v4.7 and variables values on it can be viewed using the application “UaExpert DataAccess View” even though their NodeId is apparently null.
I’m almost convinced that the problem relies on the OPC server, but I’m also wondering if it has something to do with the way a server is “processed” by your application. Has something like this happened to you?
Thank you for your time and patience!