POSIFLEX CD-3600, Advanced Manual

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3.3.11. Options for Code 128 and GS1-128
Code 128:
Code 128 is a variable length symbology with a mandatory check digit and
non-printable start/stop characters. The following characters are supported:

all 128 ASCII characters

4 non data function characters

3 start characters

4 code set selection characters

1 stop character
The check digit is calculated as the sum modulo 103 of the start character and the
weighted values of the data and special characters. For string format see figure 3.32.
Options for Code 128:

enable concatenation
GS1-128:
In this mode the Code128 data is translated to the GS1-128 format, formerly known
as EAN-128 or UCC-128. GS1-128 data starts with the FNC1 character and separates
2 data fields with the FNC1 character.
The first FNC1 character is translated to ]C1, and the second FNC1 character is
translated to an ASCII GS (hex 1D) character. For string format see figure 3.33.
Options for GS1-128:

enable GS1-128 conversion
Enable GS1-128 only:
In this mode the decoded data characters are translated to the GS1-128 format. If the
data does not comply with the GS1-128 format, then the label is rejected.