Diagnostics and Troubleshooting
132
Communications Issues
Label Formats Not Recognized
Issue Possible Cause Recommended Solution
A label format was sent to the
printer but was not recognized.
The DATA light does not flash.
The communication
parameters are incorrect.
Check the printer driver or software communications
settings (if applicable) for your connection. You may
wish to reinstall the printer driver following the
instructions in Install the Printer Driver and Connect
to a Computer on page 137.
A label format was sent to the
printer but was not recognized.
The DATA light flashes but no
printing occurs.
The prefix and delimiter
characters set in the printer do
not match the ones in the label
format.
Verify the prefix and delimiter characters using the
following SGD commands. Modify the values if
necessary.
• ! U1 getvar "zpl.format_prefix"
• ! U1 getvar "zpl.delimiter"
Incorrect data is being sent to
the printer.
Check the communication settings on the computer.
Ensure that they match the printer settings.
If the problem continues, check the label format.
Labels Stop Printing Correctly
Issue Possible Cause Recommended Solution
A label format was sent to the
printer. Several labels print,
then the printer skips,
misplaces, misses, or distorts
the image on the label.
The serial communication
settings are incorrect.
Ensure that the flow control settings match.
Check the communication cable length. See
Communication Interface Specifications on
page 185 for requirements.
Check the printer driver or software communications
settings (if applicable).
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