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Example {A,1,A,R,10,5,P,"65432" p }
Adds check digit scheme number 1 to the printer’s memory.
The modulus is 10, the maximum number of characters in the
field is 5. The check digit is calculated by using the Sum of
Products and the string of digits used in the calculation is
"65432."
Sum of Products Calculation
This is an example of how the printer uses Sum of Products to
calculate a check digit for this data:
5 2 3 2 4 5 2 1 9
1.
Weights are applied to each digit, starting with the last
digit in the weight string. They are applied right to left,
beginning at the right-most position of the field.
Remember, a weight string must contain at least two
different numbers. This example has a weight string
of
1,2,3,4
.
field:
5 2 3 2 4 5 2 1 9
weight string:
4 1 2 3 4 1 2 3 4
2.
Each digit in the field is multiplied by the weight assigned
to it:
field:
5 2 3 2 4 5 2 1 9
weight string:
4 1 2 3 4 1 2 3 4
products:
20 2 6 6 16 5 4 3 36
3.
Next, the product of each digit is added together. This is
the sum of the products.
20 + 2 + 6 + 6 + 16 + 5 + 4 + 3 + 36 = 98
Chapter 5. Defining Field Options
5-15