Paxar TCMPCL2PR manual Using Check Digits

MPCLII Packet Reference 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 these bar codes, because they have predefined check digits: UPC, EAN, Code 39 (with the MOD43 check digit), Code 93, PDF417, Maxicode, or POSTNET.

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		Adds a check digit scheme. Enter A.
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:

Dsum of digits

Psum 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.

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