Datamax-ONeil A-Class Programmer's Manual page 225

L: Interleaved 2 of 5 (with a Modulo 10 Checksum and Bearer Bars)
Valid Characters: 0-9
Variable Length: For the bearer bars to be printed, 13 characters are required.
Valid bar widths: The expected ratio of wide to narrow bars can range from 2:1 to 3:1.
The following example prints an Interleaved 2 of 5 bar code with a modulo 10 checksum
with a wide to narrow bar ratio of 3:1 and bearer bars:
<STX>L
D11<CR>
1L00000001501000123456789012<CR>
121100000000100Barcode L<CR>
E
M: 2-Digit UPC Addendum
Valid Characters: 0-9
Length: 2 digits.
Valid bar widths: The fourth character of record is the width of the narrow bar in dots.
All other bars are a ratio of the narrow bar (2 times, 3 times, and 4 times the narrow
bar width). Human readable characters for this bar code symbology are printed above
the symbol.
The following example prints a 2 digit UPC bar code addendum:
<STX>L
D11<CR>
1M000000015010042<CR>
121100000000100Barcode M<CR>
E
N: 5-Digit UPC Addendum
Valid Characters: 0-9
Length: 5 digits.
Valid bar widths: The width multiplier is the width of the narrow bar in dots. All other
bars are a ratio of the narrow bar (2 times, 3 times, and 4 times the narrow bar width).
Human readable characters for this bar code symbology are printed above the symbol.
Class Series 2 Programmer's Manual
Appendix G – Bar Code Details
211