Zebra A300 Specifications Page 88

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Changing Delimiters and Instruction Prefixes
For some applications, you may need to change the ZPL II delimiter
(default “,”) the format instruction prefix (default: “^”), and/or the
control instruction prefix (default: “~”). You can change these charac-
ters to any ASCII characters you choose, using the appropriate
instructions.
You might do this if you are using a hand-held terminal that does not
have a comma to enter the ZPL II instructions, if you are working
with a mainframe that has trouble processing the caret, or if you find
some other character(s) easier to use.
Communication Diagnostics Instructions
Zebra printers support communication diagnostics through both hard-
ware and software control. You can use these diagnostics to trouble-
shoot programs.
The ~JD (Enable Communications Diagnostics) instruction initiates a
diagnostic mode that produces an ASCII printout (using current label
length and full width of printer) of all characters received by the
printer. This printout includes the ASCII Characters, the HEX value
and any communication errors.
The ~JE (Disable Diagnostics) instruction cancels the diagnostic
mode and returns the printer to normal label printing.
Host Status Instructions
Host Identification
The ~HI (Host Identification) instruction is designed to be sent from
the Host to the Zebra printer to find out the type of Zebra printer.
Upon receipt, the Zebra printer will respond to the Host with a charac-
ter string that gives information about the printer such as the version
of firmware, dots per inch, memeory and printer options.
Print Configuration Label
The ~WC (Print Configuration Label) instruction is used to generate a
Printer Configuration Label.
NOTE: This instruction only works when the printer is idle.
CHAPTER 5 79
ZPL II Advanced Techniques
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