MDI-4000 Series Serial Interface Manual
WIME may be able to resolve issues when multi-byte characters are not correctly output with
USB-HID.
Figure 21: COM to HID Output Through WIME
4.2.9 Troubleshooting USB-COM
Use this table to find possible solutions to common USB-COM problems.
USB-COM Troubleshooting
Scan engine is not
recognized by the PC
• Make sure the USB cable is properly connected.
• Make sure that the connected USB port is operating properly.
• If you are connecting to wireless devices, like Bluetooth, disconnect
and reconnect to the device.
• Make sure that the USB port power supply is providing enough
power. Laptops or hubs may not be able to supply sufficient power.
• Remove the scan engine from the USB port, and then re-connect
the scan engine.
• Connect the scan engine to a different port.
Scan engine does not
appear in the device
manager
• Try the possible solutions for the previous problem.
• Open the COM port with the communication tool.
Error beep sounds and there
is no output after reading a
barcode
• On the PC, open Device Manager and confirm the COM port
number. For help, see “Connection Confirm” on page 29.
• Close and re-open the communication tool. For help, see the
communication tool documentation.
• Reboot the PC.
Characters are out of order
Make sure that the code to be read matches to the character code of
the communication tool.
Check the line-break setting of the communication tool.
4.3 USB-HID
When using the USB-HID interface, make sure the 12-pin FFC cable is connected to USB
signals.
Caution: UART is a standard factory default setting. If the host is using a UART
connection circuit, communication will fail.
Scan
Engine
USB-COM
Communication
Output to focused application
as character information
Windows PC
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