Appendix G – Bar Code Details
Class Series 2 Programmer’s Manual 231
Note that there is no auto-switching from or to Subset A. Standard switches are still
used (see table below).
Subset A: Includes all of the standard uppercase alphanumeric keyboard characters
plus the control and special characters.
Subset B: Includes all of the standard uppercase alphanumeric keyboard characters
plus the lowercase alphabetic and special characters.
Subset C: Includes the set of 100 digit pairs from 00 through 99 inclusive, as well as
special characters. EAN128 Subset C is used for double density encoding of numeric
data.
Special Character Handling: Characters with an ASCII value greater than 95 are
considered special characters. To access these values, a two-character reference table is
built into the printer; see table below. As an example, to encode FNC2 into an EAN128
Subset A bar code, send the ASCII & (DEC 38, HEX 26) followed by an ASCII B (DEC 66,
HEX 41). Code FNC2 will be encoded.
ASCII 2 CHAR CODE A CODE B CODE C
96 &A FNC3 FNC3 -NA-
97 &B FNC2 FNC2 -NA-
98 &C SHIFT SHIFT -NA-
99 &D CODEC -NA- -NA-
100 &E CODEB FNC4 -NA-
101 &F FNC4 CODEA CODEA
102 &G FNC1 FNC1 FNC1
Table G-5: Special Character Handling
Control Codes: Control character encoding into Code 128 Subset A by sending these
control codes:
`
= NUL
a through z
= 1 - 26
{
= ESC
|
= FS
}
= GS
~
= RS
ASCII 127
= US
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