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?
Martin Kudláček 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?
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.
Hi @roberts_lando, I have the exact same case , an inverter with three pins (+/-/GND) , did you found any solution ? I have a Neuron, it has also only two pins.
But it has a "END" switch next to the RS485 connector