Lexmark FORMS 249X Technical Reference page 183

• Completing the barcode setup and data transfer commands is not enough
to print the desired barcode. Before the barcode can be printed, the printer
must receive sufficient vertical movement commands (line feed, vertical
tab, form feed, etc.) to move down past the length of the barcode (and
human readable character, if applicable).
Example:
<x
1B5B66
0600
B4
00
00
5000
00
1B5B70
0400
30 33 39 32 - data string "0392"
>
If you were to send the two previous escape sequences only in the data-
stream, nothing would print.
The same two escape sequences followed by the line feeds (x0A's) will
result in a printed Code 39 sample because of sufficient vertical movement
to move past the length of the bars and human readable character.
- barcode setup command prefix
- setup data length (low byte first) -
x0006, 6
- barcode type = Code 39
- module width = default
- space width adjustment = default
- height (low byte first) - x0050 =
0.037 inches
- control byte
- barcode data transfer command prefix
- data transfer length (low byte first)
- x0004, 4
Section 8: Barcodes
183