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MDI-4000 Series Serial Interface Manual
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6.2 Setting Code Common Options
6.2.1 GS1 Conversion
The GS1 organization has defined fields (such as a serial number, production date, and price)
that may be encoded in a barcode. These fields are identified by an application identifier (AI)
followed by the data for that field. For example, the number 11 followed by 200213 is a
production date (11) of 2002, February 13 (200201 in the format YYMMDD).
The data for an AI does not always have a fixed length. In these cases, a Group Separator (GS)
or 0x1D is added after the variable data field. The GS character is not printable, but the MDI-
4100 has several options to convert the GS character to a printable character. By default, GS
characters are not transmitted, but you can enable sending these characters with or without
conversion.
Additionally, the GS1 organization has defined a function 1 character (FNC1). Each GS1-128
barcode starts with this character. Like the GS character, FNC1 is not printable. FNC1 is also
not an ASCII character. By default, this character is not output. But, you can output it as the
sequence ]C1, which is the AIM identifier for GS1-128.
Example of the structure of a GS1-128 barcode:
Note: If the last field contains variable length AI data, the GS character is omitted.
Example with actual data:
FNC1
AI AI Data
(Fixed)
AI
AI Data
(Variable) GS
･･･
AI AI Data
FNC1
01 95012345678903 3103
000123
Start Global trade item 14-character data
Trade item is 14 digit long AI 6-character data