Lexmark FORMS 249X Technical Reference page 148

UPC-A and EAN-13 barcodes use a flag character for number system encoding
and country code. Your printer provides the capability of printing the human
readable form of this flag character either in the vertical center along the left
side of the barcode, or under the barcode with the other human readable
characters.
Some barcodes use a check character, a character at a predetermined position
within a barcode, whose value is computed by a mathematical algorithm. When
the barcode is scanned, the scanner can check the data using the same algorithm
to validate that the barcode was read correctly.
Flag
Character
Human Readable Characters
Each barcode type has a defined set of characters. Specific parameters for each
barcode type, including their character set definitions, are covered in the
Barcode Symbologies section beginning on page 153.
Accessing the printer's resident barcode function requires sending two escape
sequences to the printer:
•
•
The barcode function is explained in the following four sections:
Barcode Setup Command
This command specifies all the necessary parameters to define the desired
barcode symbology.
Syntax:
Decimal: 27
Hex:
148
Section 8: Barcodes
Barcode setup command
Data transfer command
Barcode Setup Command
Data Transfer Command
Barcode Symbologies
Notes on Barcoding
ESC [ f
91 102 6 0 k m s v1
1B 5B 66
6 0 k m s v1
0 0 k m s v1
6 0
Check
Character
v2 c
v2 c
v2 c