Ocr Check Digit Validation - Motorola Symbol DS9808 Product Reference Manual

OCR Check Digit Validation

Parameter # F1h B6h
Use
OCR Check Digit Validation
following is a list of options.
None
No check digit validation, indicating no check digit is applied. This is the default.
*No Check Digit
(00h)
Product Add Left to Right
Each character in the scanned data is assigned a numeric value (see
Each digit representing a character in the scanned data is multiplied by its corresponding digit in the multiplier, and
the sum of these products is computed. The check digit passes if this sum modulo Check Digit Modulus is zero.
Example:
Scanned data numeric value is 132456 (check digit is 6)
Check digit multiplier string is 123456
Digit 1 3
Multiplier 1 2
Product 1 6
Product add 1+ 6+
The Check Digit Modulus is 10. It passes because 90 is divisible by 10 (the remainder is zero).
to protect against scanning errors by applying a check digit validation scheme. The
2 4 5 6
3 4 5 6
6 16 25 36
6+ 16+ 25+ 36= 90
OCR Programming 10 - 27
OCR Check Digit Multiplier on page
Product Add Left to Right
(03h)
10-26).