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4-12
Quadrus EZ Reader User’s Manual
BC412
BC412
Check Digit Output (BC412)
Usage:
It is widely used in the semi-conductor manufacturing and is particularly
useful where speed, accuracy, and ease of printing are required.
Definition:
BC412 (Binary Code 412), a proprietary IBM symbology since 1988, is an
alphanumeric symbol with a set of 35 characters, each encoded by a set of
4 bars in 12 module positions. All bars have a single width and it is the
presence or absence of bars in each of the 12 module positions that makes
it a binary code (hence the prefix “BC”).
The symbology is bi-directional and self-clocking with a start and stop character.
Serial Cmd:
< K481,status ,check digit output,fixed symbol length status,fixed symbol
length>
Default: Disabled
Options: 0 = Disabled 1 = Enabled
Usage: Check digit Output, added to the symbol, provides additional security.
Definition:
When enabled, the check digit character is read and compared along with
the symbol data. When disabled, symbol data is sent without the check
digit.
Note: With Check Digit Output and an External or Serial trigger option
enabled, an invalid check digit calculation will cause a noread message to
be transmitted at the end of the read cycle.
Serial Cmd:
< K481, status, check digit output ,fixed symbol length status,fixed symbol
length>
Default: Disabled
Options: 0 = Disabled 1 = Enabled