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Code 128
Command Structure <ESC>BGbbcccdd (data)
bb = Width of narrow element in dots (01-12)
ccc = Bar height in dots (001-600)
dd = Start code to specify initial subset of bar code data
>G Subset A Start code
>H Subset B Start code
>I Subset C Start code
(data) = Includes bar code data and subset Shift codes; Shift codes
are used to change the subset type within the bar code data.
Shift codes:
>E Subset A Shift code
>D Subset B Shift code
>C Subset C Shift code
Character Set See Code 128 Character Table on Page B-18
Density Table
Value of
“bb”
“X”
Dimension
Density (char/inch)
(mils) Subsets A, B Subset C
01 5.0 18.2 36.5
01 10.0 9.1 18.3
03 15.0 13.8 12.2
Example The following will start in Subset A for the characters “AB”, shift to
Subset B for “789”, then shift to Subset C for “123456”.
<ESC>H0200<ESC>V0550<ESC>BG03100>GAB>B789>C123456
<ESC>H0310<ESC>V655<ESC>XSAB789123456
Appendix B: Bar Code Specifications
PageB-109001041Rev.DSATOM-8400RV