1. GK420T Desktop Thermal Printer User Guide
  2. Print Operations
  3. Standalone Printing
  • GK420t Desktop Thermal Printer User Guide
Standalone Printing

Standalone Printing

Your printer can be configured to work without being attached to a computer.
The printer has the ability to automatically run a single label form. You can access one or more downloaded label forms and run them using a terminal or wedge device or a Zebra Keyboard Display Unit (KDU) to call a label form. These methods allow you to use data input devices such as scanners or weight scales to the printer via the serial port.
Label formats can be developed and stored in the printer to support labels for which:
  • No data entry required. The printer will print when
    FEED
     is pressed.
  • No data entry required. The printer will print when a label is removed from the printer’s optional label dispenser.
  • One or more data variables is entered via the terminal or wedge device. The label will print after the last variable data field has been input.
  • One or more label formats are called by scanning barcodes containing programming to run a label form.
  • Label forms are designed to work as a process chain, with each label including a bar code containing the programming to run the next label in the process sequence.
Both ZPL and EPL printer programming languages support special label forms that will automatically run after a power cycle or reset. ZPL looks for a file named
AUTOEXEC.ZPL
. EPL looks for a label form named
AUTOFR
 runs until it is disabled. If both files are loaded in your printer, only
AUTOEXEC.ZPL
 will run.
To remove the files, you must delete both files from the printer and then reset or a power cycle the printer.
For this printer model, the
AUTOFR
 EPL command can be disabled only with a
NULL
 character (00 hex or ASCII 0). This printer will ignore the the XOFF character (13 hex or ASCII 19) that normally disables the
AUTOFFR
 form operation in most other EPL printers.
Your printer can source up to 750mA through the serial port’s 5-volt line. See Interface Wiring for more information on the printer’s serial port interface.