OPC Server Connection – E_NETWORK_ERROR

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This topic contains 11 replies, has 3 voices, and was last updated by Mikhail Mikhail 3 months, 1 week ago.

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  • #3457

    AAllaby
    Participant

    Hi I am trying to connect to a Delta V OPC server and am running into some issues, so far this is what I have:
    – 2 Machines on a local network, one running Windows Server 2008, one running Windows Server 2012.
    – DCOM config setup on both machines.
    – Applicable services run as the correct user account.
    – Both machines on the same workgroup with the same admin usernames.
    – Multiple OPC test clients work in both directions between the machines.
    I am receiving an E_NETWORK_ERROR when trying to connect to the Delta V OPC Server but if I change the server to Matrikon Simulate server for example within Rapid SCADA config everything works. I have installed all the software along with different test clients on a laptop running Windows 7 as well and get the exact same issues. Maybe something with the Delta V OPC isn’t supported?
    Thank you.

    #3458
    Mikhail
    Mikhail
    Moderator

    Hi,
    Try this utility to test https://yadi.sk/d/d1UOUw153DcoDp Does it work?
    When does E_NETWORK_ERROR occur?

    The OPC server also can be the cause of the problem. For example, we contacted with a developer on a one OPC server to append the proper implementation of all needed OPC methods. When he does it, connection was OK.

    #3467

    AAllaby
    Participant

    Utility does not work, it gives the same error. The E_NETWORK_ERROR occurs while attempting to connect to the server, one thing to note with the Delta V OPC server is that you install a program called OPC remote on the client device which has a service that runs through a remote machine (OPC server) and that is how you access the data. I have multiple third party clients connected through this server already it just seems like this one does not connect.

    #3470
    Mikhail
    Mikhail
    Moderator

    Oh, did you install OPC Core Components? They are required.

    #3472

    AAllaby
    Participant

    Yes I have.

    #3475
    Mikhail
    Mikhail
    Moderator

    In this case, if it’s possible, we should contact with the OPC server developers and works with the to fix the issue. I can assist you in email conversation. We did the same thing to fix another OPC server for BACnet (I forgot its name).

    #4198

    zippoSlo
    Participant

    Hi!

    I have a similar issue connecting to CyBro OPC 3.0.6 server.

    I can’t connect with Rapid SCADA (E_NETWORK_ERROR). I also tried the test client you provided and it hangs during connection (after I select an OPC server from the list and click Connect). But I can connect with the Matrikon OPC Explorer 5.1.3.0 and works fine.

    Running all on same machine.

    Help!

    #4199
    Mikhail
    Mikhail
    Moderator

    Hi,

    Is it possible to contact a manufacturer of this OPC server? We could test the connection together. It may help to find the cause.

    Does this OPC server support OPC UA?

    #4203

    zippoSlo
    Participant

    I will contact the OPC server manufacturer and ask about UA and the will to solve the problem together.

    #4204
    Mikhail
    Mikhail
    Moderator

    You can add me (info@…) to an email copy if needed.

    #4212

    zippoSlo
    Participant

    I switched to ModBus and it works. Having still some problems, but in 2 days I managed to make it work 🙂

    It seems ModBus is a good solution for our purposes.

    #4213
    Mikhail
    Mikhail
    Moderator

    Classic OPC is a black box, difficult to find a cause. Modbus is transparent.

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