Paxar 9474 - Manual (Page 65)

S e l e c t i n g a C h e c k D i g i t S c h e m e
You can select a check digit scheme in format entry mode.
Format Entry Prompt:
CD Scheme Number [1-12]: 1 _
Values: 1 - 12
This prompt lets you select a check digit scheme. You need a
check digit scheme if you want a check digit for Code 39, I 2 of 5,
and NW7 bar codes; or for numeric text fields. You must also
select a check digit scheme if you want a verify check digit for
Code 128 and MSI bar codes.
Before making a selection, be sure the check digit calculation
scheme has been defined in Printer Options.
When you select a check digit scheme, you must mark the
positions to be used in the calculation.
Mark positions to be used:
XXXXXXXXXX_
Type an X for each position to be used, leaving a space in the
location where you want the check digit. Press e . In the
example above, we use the first 10 positions, and leave position
11 for the check digit.
The field length you enter must contain at
least one more digit than the scheme uses.
The extra position is for the check digit.
This extra (blank) position may be anywhere
in the field.
5-20 Setting Printer Options