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Communications Diagnostics
5/23/2012 GC420d™ User Guide P1052685-001
The following example of a communications DUMP mode printed out. The printout displays
hexadecimal data 00h-FFh (0-255 decimal) with a unique character for each hexadecimal
value displayed above the hexadecimal data.
The blank lines between the lines of data are where serial port and Bluetooth data handling
errors get logged. The errors are:
•F = Frame Error
• P = Parity Error
•N = Noise Error
• O = Data Overrun Error
To exit the diagnostic mode and resume printing, turn off and then turn on the printer. An
alternate method for exiting the diagnostic mode is to press the Feed button as many times as it
takes to clear the printer’s command buffer and print ‘Out of DUMP’ on the label.