Professional OPC
Development Tools

logos

lupa

Online Forums

Technical support is provided through Support Forums below. Anybody can view them; you need to Register/Login to our site (see links in upper right corner) in order to Post questions. You do not have to be a licensed user of our product.

Please read Rules for forum posts before reporting your issue or asking a question. OPC Labs team is actively monitoring the forums, and replies as soon as possible. Various technical information can also be found in our Knowledge Base. For your convenience, we have also assembled a Frequently Asked Questions page.

Do not use the Contact page for technical issues.

  1. Forum
  3. Discussions
  5. QuickOPC-UA in .NET
  7. Reading, Writing, Subscriptions
  9. OPC UA subscription - No notifications for some nodes on MOPS server

OPC UA subscription - No notifications for some nodes on MOPS server

More
14 Nov 2022 17:06 #11200 by support
Replied by support on topic OPC UA subscription - No notifications for some nodes on MOPS server
Hello.

This can be either server problem, or client problem (QuickOPC). Of course we do not think it is QuickOPC problem... In order to determine that with certainty, I would suggest to capture a Wireshark trace plus information from the client side: kb.opclabs.com/Collecting_information_for_troubleshooting . Of course, with as simple/small scenario as possible, so that the amount of data is not too big. It should then be possible to correlate the information from the network trace and the client side, and "point the blame".

Ideally, just one node - the one for which you receive no notification whatsoever. We can then look at the Wireshark trac,e and see if 1) correct parameters were passed to the server, and 2) if the server has sent any notification for that node - and if so, if it was correct.

Also, have you tried some other OPC UA client with these nodes, and if so, what were the results?

Best regards

Please Log in or Create an account to join the conversation.

More
14 Nov 2022 16:24 - 14 Nov 2022 16:25 #11199 by radek.huber
OPC UA subscription - No notifications for some nodes on MOPS server was created by radek.huber
Hello,

I encoutered strange bahaviour of our client with one MOPS OPC UA server. We do not get any notification when data are changed for some nodes. Also there is not even an initial notification after subscribtion to the node. For other nodes it works fine.
There are no exceptions or error messages.

Do you have some hints for me what could be wrong?

Best regards,
Radek Huber
Last edit: 14 Nov 2022 16:25 by radek.huber.

Please Log in or Create an account to join the conversation.

Moderators: support
  1. Forum
  3. Discussions
  5. QuickOPC-UA in .NET
  7. Reading, Writing, Subscriptions
  9. OPC UA subscription - No notifications for some nodes on MOPS server
Time to create page: 0.040 seconds