Denso QB30-SR User Manual page 23


"Safe removal of hardware" on the Windows task tray
When the USB device (scanner) is being connected, Window
in safety" on the task tray. This is useful to view the connection status of USB devices or disconnect those devices.

Changing a COM port number
Using the Windows Device Manager
Note: Before accessing a COM port number, be sure to disconnect the U
may not update the indication on the Device Manager or the task tray icon. If it happens, use the Device Manager to disable
the virtual serial port whose COM number has been changed and then enable it again.
(8) To check whether the USB device is working normally, open the Windows
Device Manager.
If "DENSO WAVE USB Device" and "DENSO WAVE Active USB-COM
Port (COMx) - Connected" are added to the tree as shown at left, the scanner is
connected normally.
If the device is not added or it is marked with
the uninstaller, reboot your computer, and perform the above connection process
again.
s shows the "Unplugging DENSO WAVE USB Device (COMx)
can change a COM port number.
12
or
SB device. Changing a COM port number sometimes
, remove this driver with