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    RS485 GND

    Axon series
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    • roberts_lando
      roberts_lando last edited by

      Hi, I need to read an Inverter using modbus RTU connecting it directly to the Axon in his RS485 port, the inverter has 3 cables A, B and GND, if I don't connect the GND it doesn't work, the same happen when connecting GND to the Axon GND screw (the one on the power adapter side).

      What am I doing wrong?

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      • roberts_lando
        roberts_lando last edited by

        @administrators

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        • Martin Kudláček
          Martin Kudláček administrators last edited by

          Hi @roberts_lando, do you have any progress on this? Typically this type of debugging requires oscilloscope to see what the voltage levels look like. Do you have some USB-RS485 converter to test the communication?

          Best regards,
          Martin

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          • roberts_lando
            roberts_lando @Martin Kudláček last edited by

            Do you have some USB-RS485 converter to test the communication

            @martin-kudláček the only way to make this working is using a converter that also has GND, it's strange Unipi doesn't support this.

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