Paxar 9474 - Manual (Page 67)

If you increment or decrement a Code 128 or MSI bar code field,
do not select V)erify check digit. The check digit entered by the
operator would be incorrect when the field increments or
decrements the first time. You do not have the option to
increment or decrement UPC or EAN bar codes.
I n c l u d e P r i c e C h e c k D i g i t
You can include a price check digit in format entry mode.
Format Entry Prompt:
Include price check digit: N
Y)es or N)o
Values: Y = Yes
N = No
If you select N for Include price check digit, the bar code
generates a standard UPC or EAN check digit. If you select Y,
then depending on whether you are defining a UPC or an EAN bar
code field, the printer generates an additional check digit:
UPC European standard check digit
EAN Random Weight Format check digit.
5-22 Setting Printer Options