Ocr User-Defined Check Character; Programming A User-Defined Check Character - Datalogic PowerScan 7000 2D Product Reference Manual

OCR Programming

OCR User-Defined Check Character

You can customize the check character calculation to suit your applica-
tion. Each character of the check character alphabet can be programmed
in its proper order. The number of characters you enter determines the
modulo value for the calculation. By default, the check character com-
putation is unweighted, but the imager also supports two weighted mod-
ulo 10 checking schemes.
Example:
To program a modulo 11 check character, you would enter the following 11
characters in order:
Also enter the OCR template:
Enable the OCR-A font, then scan the following string:
The imager performs the following check character computation:
Since the result is zero, the message is considered to be valid, so the
reader outputs the message: 6512351
Programming a User-Defined Check Char-
acter
1. Scan the Enter OCR Check Character bar code, below.
2. Enter the characters in order. For each character, look up the cor-
responding hex value from the
1252) on page A-4
manual to scan the two symbols for each hex value.
3. Scan the Save bar code on the
Example:
To program the modulo 11 check character from example #8 on
enable the OCR-A font. Scan the Enter OCR Check Character bar code on
page 8-12, then scan the following hex values in order:
8-12
0123456789X
dddddddc
6512351X
(6 + 5 + 1 + 2 +3 + 5 + 1 + X) modulo 11 = 0
Enter OCR Check Character
. Use the
3031323334353637383958
ASCII Conversion Chart (Code Page
Programming Chart on page B-5
Programming Chart on page B-5
PowerScan
of this
.
page 8-12,
®
7000 2D