Beaglebone Blue modbus fail USB

Hello,

Does anyone know why RS485 USB adapter doesn’t work on Beaglebone blue ? I am trying to read modbus from PLC.

/var/log/syslog

May 19 19:42:18 beaglebone kernel: [  309.466978] usb 1-1: USB disconnect, device number 2
May 19 19:42:18 beaglebone kernel: [  309.467958] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
May 19 19:42:18 beaglebone kernel: [  309.468079] ch341 1-1:1.0: device disconnected
May 19 19:42:18 beaglebone Node-RED[968]: 19 May 19:42:18 - [error] [function:PILNAS] TypeError: Cannot read property 'RW4000' of undefined
May 19 19:42:19 beaglebone Node-RED[968]: 19 May 19:42:19 - [error] [function:PILNAS] TypeError: Cannot read property 'RW4000' of undefined
May 19 19:42:19 beaglebone kernel: [  311.438687] usb 1-1: new full-speed USB device number 3 using musb-hdrc
May 19 19:42:20 beaglebone Node-RED[968]: 19 May 19:42:20 - [error] [function:PILNAS] TypeError: Cannot read property 'RW4000' of undefined
May 19 19:42:20 beaglebone kernel: [  311.587457] usb 1-1: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.54
May 19 19:42:20 beaglebone kernel: [  311.587478] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
May 19 19:42:20 beaglebone kernel: [  311.587486] usb 1-1: Product: USB2.0-Ser!
May 19 19:42:20 beaglebone kernel: [  311.595290] ch341 1-1:1.0: ch341-uart converter detected
May 19 19:42:20 beaglebone kernel: [  311.597296] usb 1-1: ch341-uart converter now attached to ttyUSB0
May 19 19:42:21 beaglebone Node-RED[968]: 19 May 19:42:21 - [error] [function:PILNAS] TypeError: Cannot read property 'RW4000' of undefined
May 19 19:42:22 beaglebone Node-RED[968]: 19 May 19:42:22 - [error] [function:PILNAS] TypeError: Cannot read property 'RW4000' of undefined
May 19 19:42:22 beaglebone ModemManager[371]: <info>  Couldn't check support for device '/sys/devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1': not supported by any plugin