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Thread: CR7nnS Modbus TCP

  1. #1
    Join Date
    Sep 2016

    Default CR7nnS Modbus TCP

    I need to share some data from a CR721S PLC (with firmware version and Codesys 3.5 SP11) with Modbus TCP from Ethernet interface. The system works but after a while the Ethernet communication blocks. The PLC still working but the Modbus TCP stops and also if I try to connect to the PLC with Codesys is not possible.
    When this happens I need to switch off only the PLC and then everything start working again.
    Have you any idea how to fix this issue?
    Is there some way to diagnostic the ethernet issue on ethernet port and then restor by code?


  2. #2
    Join Date
    May 2009
    Minneapolis, MN


    I would run with the newest version of the firmware. There is full Modbus support in V3.1.0.6.

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