Code 128 Subset Switching - Microcom 424 Operator's Manual

Bar Codes
The
printer
defaults to
subset B
Subset A
This subset contains 106 unique characters, which includes numbers 0 through 9, the
English alphabet (uppercase only), punctuation marks, ASCII control codes, and the special
function codes listed in Table 8-3.
Subset B
This subset contains 106 unique characters, which includes numbers 0 through 9, the
English alphabet (both uppercase and lower case), punctuation marks, and the special
function codes listed in Table 8-3. This is the default if a subset is not defined when using
manual compression.
Subset C
This subset contains 106 unique characters, which includes matched pair numbers 00
through 99 and the special function codes listed in Table 8-3. Subset C requires that an
even amount of digits to be sent because the matched pairs are encoded as a single
character. This allows for a greater amount of compression than subsets A and B. If an
odd amount of digits and/or non-numeric characters were sent while using subset C, the
resulting bar code produced would be invalid.
8.1.16 Codabar (Rationalized), TCI 42
Codabar is a variable length linear symbology that is commonly used in libraries, blood
banks, and in the air parcel business. Codabar is capable of encoding the 16 following
characters: 0123456789-$:/. + and the four start/stop characters ABCD. This symbology
uses 2:1, 3:1, and 5:2 ratios, which may be selected using the CGN parameter.
8.1.17 Code 93, TCI 43
Code 93 is a variable length, alphanumeric symbology that is capable of encoding 48
different characters and through the use of control characters can encode the full 128 ASCII
character set. The 48 characters include the "space", numerical characters 0 through 9, the
English alphabet (uppercase only), characters $%+-. / along with five special characters
including the start/stop character.
8-8
ABC#3012345#5abc
The "#3"
code, while
in subset B,
switches to
subset C.
Figure 8-1

Code 128 Subset Switching

The "#5"
code, while in
subset C,
switches to
subset A.
224/424 Operator's Manual - 880027-1000
Chapter 8