Appendix B: Defining a Custom ABA String Format
148 Schneider Electric
T332222...
For every combination of shared fields (two, three, or four fields), the
following table tells you which hexadecimal integer to use in your
string structure.
Note: Each integer in the above table is the sum of the integers that
represent the shared fields (1 for site code, 2 for card number, 4
for issue code, and 8 for manufacturer code). For example, a 9
specifies a share between the site code field (1) and
manufacturer code field (8) — in other words, 1 plus 8.
Remember the string structure must be fixed-length.
To share digits in
these fields...
Use this Shared
Hexadecimal Integer
Card Number
Site Code
3 (represents 2 + 1)
Site Code
Card Issue Code
5 (represents 1 + 4)
Card Number
Card Issue Code
6 (represents 2 + 4)
CardNumber
SiteCode
Card Issue Code
7 (represents 2 + 1 + 4)
Site Code
Manufacturer Code
9 (represents 1 + 8)
Card Number
Manufacturer Code
A (represents 2 + 8)
Card Number
Site Code
Manufacturer Code
B (represents 2 + 1 + 8)
Card Issue Code
Manufacturer Code
C (represents 4 + 8)
Site Code
Card Issue Code
Manufacturer Code
D (represents 1 + 4 + 8)
Card Number
Site Code
Manufacturer Code
E (represents 2 + 1 + 8)
Card Number
Site Code
Card Issue Code
Manufacturer Code
F (represents 2 + 1 + 4 + 8)
