IdAutomation SC7USB 2D, Programming Manual

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Then scan the string below:
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
a.Weighted Modulo 10 Check Character
Since the result is zero, the message is considered to be valid, so the
reader outputs the message: 0123456
b.Weighted Modulo 10 Check Character
Starting with the check character and working backward through
the message, the scanner applies a multiplier of 1, then 2, then 1,
then 2, and so on. When the result of the multiplication is greater
than 9, add both digits to the running sum. This is often referred to
as the LUHN formula. One common application of the LUHN
formula is validate credit card numbers. This is the modulo 10
checking scheme used in MSI Code and in Code 32 Pharmaceutical
(PARAF). To apply this weighting scheme, set the OCR check
character to
"0123456789x2x1" or scan the following symbol:
Example: Scan the Weighted Modulo 10 Check Character symbol.
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