A795 User Guide: Programming Supplement
Chapter 4: Programming commands
91
Print bar code
First Variation
Second Variation
ASCII
GS k m d1…dk NUL
GS k m n d1…dn
Hexadecimal
1D 6B m d1…dk 00
1D 6B m n d1…dn
Decimal
29 107 m d1 dk 0
29 107 m n d1…dn
(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
m
Bar code
d1...dk
n, length
0
UPC-A
48- 57 (ASCII numerals)
Fixed length: 11, 12
1
UPC-E
48- 57
Fixed length: 11, 12
2
JAN13 (EAN)
48- 57
Fixed length: 12, 13
3
JAN8 (EAN)
48- 57
Fixed length: 7, 8
4
Code 39
48- 57, 65- 90 (ASCII alphabet), 32, 36, 37,
Variable length
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
Variable length (even number)
6
Codabar
65- 68, start code 48- 57, 36, 43, 45, 46, 47, 58
Variable length
10
PDF 417
32-255
Variable length
Print bar code (continued)
