Appendix I
MSI/Plessey Specifications
Plessey is a variable length numeric only bar code. MSI Bar Code is a variable length,
The MSI Mod 10 check digit is calculated as follows:
The example bar code data is:
82345
1.Form a number from the odd positions, starting in the units position.
835
2.Multiply the new number by 2
(835)x 2 = 1670
3.Add the digits of product
1+ 6 + 7 + 0 = 14
4.Add the even digits of the original number to the result in 3
2 + 4 + 14 = 20
5.Subtract the result from the next highest multiple of 10
20 - 20 = 0
6.New Check Digit
0
7.Data with check digit is:
823450
45