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Using Check Digits
Check digits are typically used to ensure that a text or bar code
field scans correctly. If you apply Option 31, the printer calculates
a check digit. A check digit scheme determines how the printer
calculates a check digit. When you define a check digit scheme,
you assign a number to identify it. This number is later entered in
box
R4
when you apply Option 31 to a field. You can use check
digits with text or bar code fields. Check digit calculations are
performed on numeric data only.
Do not use check digits with price fields. Do not define a check
digit scheme for these bar codes, because they have predefined
check digits: UPC, EAN, Code 39 (with the MOD43 check digit),
and Code 93.
Syntax
{A,selector,action,device,modulus,
fld_length,D/P,"weights"
p
}
A1. A Check Digit Header.
A2. selector Assign a number from
1
-
10
to this check digit formula.
A3. action The action to perform. Enter
A
to add the check digit scheme.
A4. device Device. Use
R
.
A5. modulus Number from
2
-
11
. The modulus is used to divide the sum
of products or the sum of digits.
A6. fld_length The maximum number of characters the field will contain.
Range:
0
-
2710
.
A7. D/P Algorithm. The algorithm determines how the check digit is
calculated.Options:
D
sum of digits
P
sum of products
A8. "weights
"
String of digits used for calculation. A weight string is a group
of two or more numbers that is applied to a field. The number
of digits in this string should equal the number in fld_length.
Enclose in quotation marks. Range:
0
-
2710
.
Defining Field Options
4-15