OCR Programming
273
Product 6 10 8 12 10 6
Product add 6+ 10+ 8+ 12+ 10= 46 6
The Check Digit Modulus is 10. It passes because 46 divided by 10 leaves a remainder of 6.
Digit Add Right To Left Simple Remainder
Each character in the scanned data is assigned a numeric value (see OCR Check Digit Multiplier on page 269).
The check digit multiplier is reversed in order. Each value representing a character in the scanned data is
multiplied by its corresponding digit in the reversed multiplier, resulting in a product for each character in the
scanned data. The sum of each individual digit in all of the products except for the check digit's product is then
calculated. The check digit passes if this sum modulo Check Digit Modulus is equal to the check digit's product.
Example:
Scanned data numeric value is 122459 (check digit is 6)
Check digit multiplier string is 123456
Digit 1 2 2 4 5 9
Multiplier 6 5 4 3 2 1
Product 6 10 8 12 10 9
Digit add 6+ 1+0+ 8+ 1+2+ 1+0= 19 9
The Check Digit Modulus is 10. It passes because 19 divided by 10 leaves a remainder of 9.
Health Industry - HIBCC43
This is the health industry module 43 check digit standard. The check digit is the modulus 43 sum of all the
character values in a given message, and is printed as the last character in a given message.
Example:
Supplier Labelling Data Structure: + A 1 2 3 B J C 5 D 6 E 7 1
Sum of values: 41+10+1+2+3+11+19+12+5+13+6+14+7+1 = 145
Product Add Right to Left Simple Remainder
(5)
Digit Add Right to Left Simple Remainder
(6)
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