Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 88)

6–15 Configuration: Symbology
Publication 2755-833
The midrange value is half the sum of the widths of the narrowest
and widest bar in the symbol. If the setting is midrange, the decoder
will not reject symbols based on the wide to narrow bar ratio setting.
Instead, all bars greater than or equal to the midrange are wide bars
and all bars less than the midrange are narrow bars. Select midrange
to prevent the decoder from rejecting a symbol based on the wide to
narrow bar ratio.
Note: When set to midrange, the decoder will reject any symbol that
contains bars that exactly equal the midrange width.
Code Verification List (Pharma-Code Decoders Only)
Field Type Options
Edit
7 through 8190
Blank
Defines a list of numeric values the decoder uses to validate decoded
Pharma-Code Symbols.
Because the orientation of a Pharma-Code label determines its value,
you can use the Code Verification List to enhance data security
when the value of the symbol is known. The decoder compares the
value of the decoded symbol to all entries in the Code Verification
List. If the value is in the list, a valid read occurs. If the value is not
in the list, the decode is discarded. If all fields are left blank, the list
is ignored and the decoder processes reads normally. This prevents
inaccurate reads resulting from incorrect label orientation, decode
configuration errors, or misreads due to poor label quality.
Note: If any value appears in the table, then only symbols that match
an entry in the table will match.
The Code Verification List holds up to 16 values. Each field is
numbered from 1 to 16. You can enter a value from 7 to 8190 in each
field or leave the field blank. The default value for each field is
blank.
Note: The Code Verification List is independent of the Match Code
Table (described in the User Manual).