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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 UPC, EAN, Code 39 (with the MOD43 check digit), and Code 93
bar codes, because they have predefined check digits.
Syntax
{A,selector,action,device,modulus,
fld_length,D/P,"weights" p }
A1. A Check Digit Header.
A2. selector Assign a number from 1-10to this check digit formula.
A3. action Theactiontoperform. EnterA to add the check digit scheme.
A4. device Format storage 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. “w eights” 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 m arks.
Range: 0 - 2710.
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.”
Defining Field Options 3-13