M-S Cash Drawer A794 User Manual
Page 127
Chapter 6: Programming Information
A794 Owner’s Guide
December 1999
122
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
d
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, 43, 45, 46, 47 (ASCII special
characters)
d1 = dk = 42 (start/stop code is
supplied by printer if necessary)
Variable Length
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