User`s manual

A–3Bar Codes
Bar Codes
A bar code is a graphic representation of alphanumeric characters that can be
read by a scanning device.
In Digital emulation, three escape sequences enable the printer to print bar
codes. One escape sequence sets the bar code parameters, another starts bar
code production, and the third sequence stops bar code printing.
Select Bar Codes Attributes Sequence (DECSBCA)
ASCII Code: ESC [ P1; P2;...P9‘q
Hex Code: 1B 5B P1 3B P2 3B...P9 27 71
Dec Code: 27 91 P1 59 P2 59...P9 39 113
Purpose: Selects bar code type and orientation.
Discussion: Once defined, bar code parameters remain in effect until:
• A new bar code select parameter sequence is sent
• A reset command returns settings to default values
• On power–up, the default values are set
Bar code parameters are set according to the following choices:
• P1 defines parameters for the various bar code styles:
FunctionP1
0/missing
1
2
3
4
5
6
7
Code 39 (default)
Interleaved 2 of 5
Code 39
Extended Code 39
EAN–8
EAN–13
Code 11
Codabar a/t
FunctionP1
8
9
10
11
12
13
14
15
Codabar b/n
Codabar c/*
Codabar d/e
UPC–A
UPC–E
Postnet
Code 128
Code 128–UCC
• P2 sets the width for the narrow bars and spaces in units specified by the
SSU code.