Using Modbus RTU in Ubuntu System

[wilson]

Hi,
May I use Modbus RTU communication in Ubuntu system? I follow the instruction “Connecting Devices Using Modbus Protocol”. But I cannot change port name in Communication Line Parameters page. I think I should find a way to change it because the serial port is binded in /dev/ttyUSB0 in Ubuntu system. Thanks for your help.

Regrads,
Wilson

[wilson]

Hi all,
I found I can type /dev/ttyUSB0 as port name directly. And *.dat contains this info as well. After testing, it works well to communicate devices via Modbus RTU protocol.

Regards,
Wilson

[manjey73]

Better yet, if you get the udev rules then you will be able to name your USB-RS485 e.g. /dev/mydev/COM1 and not to pay attention that reboots it may be ttyUSB1 instead of ttyUSB0

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