The FX-USB-AW is a RS-422/USB conversion interface unit to connect the FX series PLC to a personal computer. USB driver software for connecting a PC with FX-USB-AW.
First you need to download the drivers from the site link below:
https://www.mitsubishielectric.co.jp/fa/download/index.html
Or you can download the driver from Here.
Once you download drivers, Plugin your device , Go to device manager
Right Click on FX-USB-AW >> Properties
Click on Update Driver
Provide the Location of driver:
Watch step by step procedure in below tutorial link for more clarification.