Option 51 (Pdf417 Security/Truncation) - Paxar 9402 Reference Manual

Creates a custom bar code density with a narrow element of 4
dots, a wide element of 8 dots, a gap of 4 dots, 4 additional dot
widths for the narrow bar code space, 8 additional dot widths for
the wide bar code space (if this is a Code 39 or Codabar bar
code).
O p t i o n 5 1 ( P D F 4 1 7 S e c u r i t y / Tr u n c a t i o n )
You can define a security level and choose whether or not to
truncate a PDF417 bar code. Higher security levels add data to a
bar code, improving scan reliability. Some damaged bar codes
may still be scannable if the security level is high enough. You
can use this option to create standard PDF417 bar codes or use
the truncated option to create a narrower bar code. This option
can appear only once per PDF417 field, in any order, following
the bar code field.
As the security level is increased, so is the size of your PDF417
bar code. For each level increased, the bar code will double in
size.
Syntax
R1. R Option Header.
R2. 51 Indicates Option 51.
R3. security Security level ranges from 0-8 (0 is the default).
Higher security levels add data to a bar code, improving scan
reliability. Some damaged bar codes may still be scannable if
the security level is high enough.
R4. stand/def Truncation selector. Valid values:
Example
Defines a security level of 2 for a standard PDF417 bar code.
R,51,security,stand/default p
S (default) a standard PDF417 bar code
T truncated
R,51,2,S p
Defining Field Options 4-13