Instruction manual

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 to 10 to this check digit formula.
A3. action The action to perform. Enter A to add the check digit scheme.
A4. device Format storage device. Use R (Volatile RAM).
A5. modulus Number from 2 to 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 to 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 to 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 4-9