The USB drivers likely failed to install. Navigate to the extracted installer folder > Drivers > USB_COM_Driver . Right-click Lovato_COM_Driver.inf and select Install . Reconnect your PLC to a different USB port.
Use the Xpress Download portal to access the installer. Lovato Xpress Software Download
Key benefits of the official version:
View live measures and trend graphs with up to 8 simultaneous parameters. The USB drivers likely failed to install
Perform product firmware upgrades specifically via the CX01 USB dongle. System Requirements Lovato Xpress Software Download