Modbus TCP multiple connections slow

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This topic contains 3 replies, has 2 voices, and was last updated by Avatar fahrur 3 years, 5 months ago.

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  • #1085
    Avatar
    fahrur
    Participant

    i have 7 multiple device, and planning to add 250 devices in the future.
    the problem is, when 1 or 2 devices have communication issues :
    ______________________
    2016-05-06 07:03:57 Establish a TCP connection with 172.16.1.61:502
    Error establishing TCP connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 172.16.1.61:502
    2016-05-06 07:04:18 Unable to communicate with the device because connection is not established
    _____________________
    the other devices connections stuck and wait the establish connection process on error device till finish, it’s still fast to get realtime data in 7 connection devices, i cant imagine when it’s reach 250 devices or more.

    thanks.

    #1089
    Mikhail
    Mikhail
    Moderator

    As an option you can split polling into several communication lines to communicate in parallel.

    How long does it wait if connection can’t be established?

    #1090
    Mikhail
    Mikhail
    Moderator

    I think it will be good idea to implement connection timeout. It will be done in a one of the future version of Rapid SCADA. Also this work can be accelerated on commercial basis.

    #1103
    Avatar
    fahrur
    Participant

    Thank you for fast respond, now i split polling into several communication lines. Its collecting without problems 😀

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