OCR User-Defined Check Character
Product Reference Guide
8-13
After you enter all the desired hex values, scan the Save bar code on
the
Programming Chart on page B-5
of this manual.
Weighting Options
By default, the check character computation is unweighted. It is possible
to use one of two weighted modulo 10 schemes. Weighting is often used
to detect if two neighboring characters are transposed, a common error
when an operator keys in data.
3-1-3-1 Weighted Modulo 10 Check Character
Starting with the check character and working backward through the
message, the imager applies a multiplier of 1, then 3, then 1, then 3, and
so on. This is the checking scheme used in many EAN•UCC symbolo-
gies, including U.P.C. and Interleaved 2 of 5 (when a check digit is
invoked). To apply this weighting scheme, set the OCR check character
to “0123456789x3x1” or scan the following symbol:
Example:
Scan the 3-1-3-1 Weighted Modulo 10 Check Character symbol. Also enter
the OCR template:
dddddddc
Then scan the string below:
01234565
The reader performs the check character computation below:
(0 x 3 + 1 x 1 + 2 x 3 + 3 x 1 + 4 x 3 + 5 x 1 + 6 x 3 + 5 x 1) modulo 10 = 0
Since the result is zero, the message is considered to be valid, so the
reader outputs the message: 0123456
3-1-3-1 Weighted Modulo 10
Check Character
Summary of Contents for POWERSCAN 7000 2D Imager
Page 1: ...PowerScan 7000 2D Imager Product Reference Guide...
Page 8: ...vi PowerScan 7000 2D...
Page 30: ...Terminal Interfaces 2 12 PowerScan 7000 2D NOTES...
Page 118: ...Symbologies 6 50 PowerScan 7000 2D NOTES...
Page 130: ...Imaging Commands 7 12 PowerScan 7000 2D NOTES...
Page 148: ...OCR Programming 8 18 PowerScan 7000 2D NOTES...
Page 154: ...Utilities 9 6 PowerScan 7000 2D NOTES...
Page 182: ...Serial Programming Commands 10 28 PowerScan 7000 2D NOTES...
Page 194: ...A 8 PowerScan 7000 2D NOTES...
Page 198: ...B 4 PowerScan 7000 2D OCR Programming Chart a e d g c h t l Discard Save r...
Page 199: ...Programming Chart Product Reference Guide B 5 Programming Chart A C B F E D 1 0 2 3...
Page 201: ...Programming Chart Product Reference Guide B 7 NOTES...
Page 202: ...B 8 PowerScan 7000 2D NOTES...
Page 203: ......
