Printronix P5000LJ Series, Руководство программиста

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Bar Codes
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ESC*z#C Bar Code Label Placement
This escape sequence specifies the horizontal starting location of a bar code
by specifying the column number based on the currently active print pitch.
The value field (#) indicates the absolute column position the bar code will
begin printing. A plus or minus sign in the value field is ignored. A value field
whose position is less than the current active printing position is illegal and
causes the cursor to move to the next column position to the right of the
current active printing position. When printing bar codes, always allow at least
1/4 inch margin in all directions from each bar code. This will limit the
interference from other characters and help readability. If you need to print
text and bar codes on the same line, see the “Printing Bar Codes With Text”
discussion later in this chapter.
ESC*z#Q Bar Code Header Control
This sequence specifies the placement of the bar code header. A number 1 in
the value field specifies that a header will be printed above the bar code label
and a 2 specifies that it will be placed below the bar code. A zero in the value
field specifies that no header will be printed. The printer default places the
header above the bar code.
ESC*z<Bar Code Data>Z Bar Code Label Data
This sequence sends the bar code label data in the form of an alphanumeric
string enclosed in angled brackets. The header (if enabled) will print in the
location specified by the bar code header control sequence.
The printer automatically formats the bar code, inserts start and stop bits, and
calculates and inserts the checksum (if applicable-not for Code 3 of 9,
Industrial 2 of 5, or Interleaved 2 of 5 ).
For UPC E bar codes, a zero (0) must be in the first position of the bar code
data.
Note Upon termination of the bar code label data escape sequence, the printer
will print all buffered bar code data and generate a carriage return.