Print Bar Code - CognitiveTPG A798 Programming Manual

84 Chapter 4: Programming Commands

Print bar code

First Variation
ASCII GS k m d1...dk NUL GS k m n d1...dn
Hexadecimal 1D 6B m d1...dk 00
Decimal
29 107 m d1 dk 0
(0 = End of command)
Selects the bar code type and prints a bar code for the ASCII characters entered. If the width of the bar code exceeds one
line, the bar code is not printed.
There are two variations to this command. The first variation uses a NUL character to terminate the string; the second uses
a length byte at the beginning of the string to compensate for the code 128 bar code, which can accept a NUL character as
part of the data. With the second variation, the length of byte is specified at the beginning of the string.
Bar codes can be aligned left, center, or right using the align positions command (1B 61).
The check digit is calculated for UPC and JAN (EAN) codes if it is not sent from the host computer. Six-character zero-
suppressed UPC-E tags are generated from full 11 or 12 characters sent from the host computer according to standard
UPC-E rules. Start/stop characters are added for code 39 if they are not included.
Rotated barcodes set with small modules (select bar code width command 1D 77 n , with n=1 or 2) and PDF 417 barcodes
in any orientation are printed at low speed, for better readability.
Exceptions
The command is only valid at the beginning of a line.
Illegal data cancels the command.
Values:
First variation: String terminated with NUL character. Length k is not specified in command string; it depends on the bar
code being printed.
m Bar code d1...dk
0 UPC-A 48–57 (ASCII numerals)
1 UPC-E 48–57
2 JAN13 (EAN) 48–57
3 JAN8 (EAN) 48–57
4 Code 39 48- 57, 65- 90 (ASCII alphabet), 32, 36, 37,
43, 45, 46, 47 (ASCII special characters)
d1 = dk = 42 (start/stop code is supplied
by printer if necessary)
5 Interleaved 2 of 5 48–57
6 Codabar 65–68, start code 48–57, 36, 43, 45, 46, 47, 58
10 PDF 417 32–255
Second Variation
1D 6B m n d1...dn
29 107 m n d1...dn
A798-PG00001C
Revision C 12/09
length
Fixed length: 11, 12
Fixed length: 11, 12
Fixed length: 12, 13
Fixed length: 7, 8
Variable length
Variable length (even number)
Variable length
Variable length