Oki B6250n Reference Guide - Page 159

Introduction How Barcoding Works

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APPENDIX B INTRODUCTION The Barcode feature provides access to scalable, configured barcode printing via special PCL font selection sequences. Such barcodes can be printed in a variety of sizes and rotations, with automatic generation of check characters, etc. upon request. The barcodes are rendered algorithmically; there are no "barcode fonts" used. This feature offers better barcode support than bar coding fonts, due to the fact that bar thickness, wide-to-narrow ratios, check digit support, etc. can be supported in ways that are not available with bar coding fonts. Also, there are some barcodes (like Interleaved 2 of 5) that cannot conveniently be supported with barcode fonts. HOW BARCODING WORKS The use of the B6250/B6500 PCL5 bar codes requires the user to insert certain special font selection commands in the PCL5 data stream. Special typefaces are reserved for activation of the processor. There are several steps that are taken in order to process barcode data. 1. Activation is by selection of one of the reserved typeface numbers in the standard PCL typeface selection escape sequence (s#T. In general, the reserved typefaces are all in the range of 24580 to 24800. Additional barcode parameters are specified by way of the other standard font selection commands (see page 161 for descriptions of how these commands are interpreted): • (s#P • (s#H • (s#V • (s#S • (s#B 2. After the barcode parameters have been selected, subsequent text data will be gathered for processing. The end of bar code data is determined according to the bar code type: B6250/B6500 User's Guide> 159

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B6250/B6500 User’s Guide> 159
A
PPENDIX
B
I
NTRODUCTION
The Barcode feature provides access to scalable, configured barcode
printing via special PCL font selection sequences. Such barcodes can
be printed in a variety of sizes and rotations, with automatic
generation of check characters, etc. upon request. The barcodes are
rendered algorithmically; there are no “barcode fonts” used.
This feature offers better barcode support than bar coding fonts, due
to the fact that bar thickness, wide-to-narrow ratios, check digit
support, etc. can be supported in ways that are not available with
bar coding fonts. Also, there are some barcodes (like Interleaved 2
of 5) that cannot conveniently be supported with barcode fonts.
H
OW
B
ARCODING
W
ORKS
The use of the B6250/B6500 PCL5 bar codes requires the user to
insert certain special font selection commands in the PCL5 data
stream. Special typefaces are reserved for activation of the
processor.
There are several steps that are taken in order to process barcode
data.
1.
Activation is by selection of one of the reserved typeface
numbers in the standard PCL typeface selection escape
sequence <ESC>(s#T.
In general, the reserved typefaces
are all in the range of 24580 to 24800.
Additional barcode parameters are specified by way of the
other standard font selection commands (see page 161 for
descriptions of how these commands are interpreted):
•
<ESC>(s#P
•
<ESC>(s#H
•
<ESC>(s#V
•
<ESC>(s#S
•
<ESC>(s#B
2.
After the barcode parameters have been selected,
subsequent text data will be gathered for processing. The
end of bar code data is determined according to the bar code
type: