MDI-4000 Series Serial Interface Manual
27
4.1.8
Troubleshooting UART
Use this table to find possible solutions to common UART problems.
UART Troubleshooting
Problem
Possible Solutions
Cannot communicate
•
Make sure communication settings, such as transfer speed and
character format, are correct.
•
Send the Z2 command. Most communication settings do not take effect
until the Z2 command is sent.
•
Verify the handshake setting.
No response when
sending command
•
Make sure communication settings, such as transfer speed and
character format, are correct.
•
Make sure that the code to be read matches to the character code of
the communication tool.
Nonsensical
characters
•
Make sure the communication settings are correct.
•
Check the line-break setting of the communication tool.
4.2
USB-COM
When using the USB-COM interface, make sure the 12-pin FFC cable is connected to the USB
signals. For more information, see
“USB-COM Interface Signal” on page 28
Caution: UART is a standard factory default setting. If the host is using a UART
connection circuit, communication will fail
.
4.2.1
How to Switch to USB-COM
When you change the interface to USB-COM, the configuration change persists through a
firmware update.
Use one of these methods to change the serial interface to USB-COM:
•
Send this command:
[X.Z[C01[X.ZZ2
•
Read this 2D menu barcode:
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