4. Divide the sum of the digits by the modulus (10 in this
case), only to the whole number. The balance is called
the remainder.
4
10 44
40
4
5. Subtract the remainder from the modulus.
The result becomes the check digit. In this case, the
check digit is 6.
10 - 4 = 6
J640 Programmer’s Manual
3-6
