Verifying Check Digits

You can make the printer verify a check digit entered by the operator.

1.Define the text or bar code field on the Format Worksheet, as shown in Chapter 2, "Designing a Format."

42	Price
60	Incrementing

2.Find Option 31 on the Format Worksheet. This value is the option for check digits.

3.Write V in box R3, after 31. This value tells the printer to verify a check digit. The check digit is the last digit in the field.

4.Write the selector number of the check digit scheme (box A2 ) after G.

Check Digit Verification on Copied Fields

The 9401/9402 printer does not verify a check digit on numeric text fields that have been copied from a previous field.

For example, a text field with field Option 4 followed by field Option 31 with the Verify option (as shown below) does not work.

T,2,6,V,061,010,2,2,2,1,B,L,0,0 p

R,4,1,1,6,2 p

R,31,V,5 p

Instead, use the following procedure:

1.Place the Verify option on the operator-entered field.

2.Copy the verified field (including formatted data) into the destination field.

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