"CreateDaSubscr()" method in "KpOpcLogic.cs" can't get value.

Forum Home Forums Communicating with Devices OPC "CreateDaSubscr()" method in "KpOpcLogic.cs" can't get value.

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This topic contains 2 replies, has 2 voices, and was last updated by Mikhail Mikhail 11 months, 3 weeks ago.

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  • #2979

    braveheartjhl
    Participant

    Hello Mikhail
    The same one OPC Server, “CreateDaSubscr()” method in “KpOpcLogic.cs” can’t get value,but “tvKP_AfterSelect” method in “FrmConfig.cs” can get value.
    can’t get value
    function

    function

    can get value
    function

    function

    function

    How can I solve these errors?
    Thank you for your help!

    • This topic was modified 11 months, 3 weeks ago by  braveheartjhl.
    • This topic was modified 11 months, 3 weeks ago by  braveheartjhl.
    #2982
    Mikhail
    Mikhail
    Moderator

    Hello,
    The service and the GIU works as different Windows users with different privileges. You can check user names in Task Manager. This is important when use OPC.

    #2983
    Mikhail
    Mikhail
    Moderator

    By default the service works as system user. You can change a user in the properties of the service.

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