OCR Programming 11 - 25
OCR Check Digit Multiplier
Parameter # 700 (SSI # F1h BCh)
This option sets OCR check digit multipliers for the character positions. For check digit validation, each
character in scanned data has an equivalent weight used in the check digit calculation. DS457 OCR ships with
the following weight equivalents:
0 = 0 A = 10 K = 20 U = 30
1 = 1 B = 11 L = 21 V = 31
2 = 2 C = 12 M = 22 W = 32
3 = 3 D = 13 N = 23 X = 33
4 = 4 E = 14 O = 24 Y = 34
5 = 5 F = 15 P = 25 Z = 35
6 = 6 G = 16 Q = 26 Space = 0
7 = 7 H = 17 R = 27
8 = 8 I = 18 S = 28
9 = 9 J = 19 T = 29
All other characters are equivalent to one (1).
You can define the multiplier string if it is different from the default.
121212121212 (default)
123456789A (for ISBN, Product Add Right to Left. See OCR Check Digit Validation on page 11-26)
For example:
ISBN 0 2 0 1 1 8 3 9 9 4
Multiplier 10 9 8 7 6 5 4 3 2 1
Product 0 18 0 7 6 40 12 27 18 4
Product add 0+ 18+ 0+ 7+ 6+ 40+ 12+ 27+ 18+ 4= 132
ISBN uses modulo 11 for its check digit. In this case, 132 is divisible by 11, so it passes the check digit.
To set the check digit multiplier, scan the following bar code, then scan numbers and letters to form the
multiplier string from the Alphanumeric Keyboard from the Advanced Data Formatting Programmer Guide.
Then scan End of Message from the Advanced Data Formatting Programmer Guide.
OCR Check Digit Multiplier
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