Hello,

For those who are interested, I have found the source of the problem. My mistake was to add the following lines to the CODESYSControl.cfg file:
[SysCom]
Linux.Devicefile=/dev/ttyUSB0

instead of the lines :
[SysCom]
Linux.Devicefile=/dev/ttyUSB

Regards,

Hello dirk, thank you for your reply. The interface of my USB - RS485 interface is ttyUSB0 ttyUSB0.png . In codesys I configure the COM PORT as follows: portCODESYS.png . I've added the necessary lines to CODESYSControl.cfg: [SysCom] Linux.Devicefile=/dev/ttyUSB0 By the way, this file is located in ...

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