Communications Issues
Communications Issues

Communications Issues

Issue
Possible Cause
Recommended Solution
Label Formats Not Recognized
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 Connecting the Printer to a Device.
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 persists, check the label format.
Labels Stop Printing Correctly
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 for requirements.
Check the printer driver or software communications settings (if applicable).