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This printer supports the Code 128 subsets A, B, and C. If the data begins with at least
four numeric characters the default start code is subset C. If there is a non-numeric in
the first four characters then the default start code is subset B. The next character
after start is always FNC1. Subset switching between B and C is performed based on
rules as below:
1. If in subset C and there are an odd number of numeric digits, subset B will be set
prior to the last digit.
2. If four or more numeric digits appear consecutively while in subset B, the character
code C will be set prior to the digits.
3. When in subset C and a non-numeric occurs, subset B will be inserted prior to the
character.
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 barcode, send the ASCII & (DEC 38, HEX 26) followed by an ASCII B
(DEC 66, HEX 41). Code FNC2 will be encoded.
ASCII
96
97
98
99
100
101
102
Control Codes: By sending these control codes, control characters can be encoded
into a Code 128 Subset A barcode (e.g., ABC{DE will be encoded as ABCDE):
DPL Command Reference
2 CHAR
CODE A
&A
FNC3
&B
FNC2
&C
SHIFT
&D
CODEC
&E
CODEB
&F
FNC4
&G
FNC1
CODE B
CODE C
FNC3
N/A
FNC2
N/A
SHIFT
N/A
N/A
N/A
FNC4
N/A
CODEA
CODEA
FNC1
FNC1
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