Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 343)

Glossary G–2
Publication 2755-833
bar code
The vertical bars and spaces found in a bar code symbol.
bar code density
The number of characters which can be represented in a linear inch.
bar code label
A label that carries a bar code and is suitable to be affixed to an
article.
bar code symbol
A group of vertical bars that represent a character or group of
characters whose spacing is determined by a specific set of rules. In
most cases, human readable characters are printed below the bars.
Also referred to as a field.
bar length
The bar dimension perpendicular to the bar width.
bar width
The thickness of a bar measured from the edge closest to the
symbol’s start character to the trailing edge of the same bar.
bit
Binary digit. The smallest unit of information in the binary
numbering system. Represented by the digits 0 and 1. The smallest
unit of memory.
buffer
Storage register for the temporary storage of data that allows data to
be decoded at different rates.
buffer full
An output condition that occurs when the buffer is full.
buffer overflow
An output condition that occurs when the buffer is full and the
decoder produces additional
bar code data.
byte
8 bits operated on as a unit.
C
capture count
The number of identical and valid scans which must be decoded for a
valid read to occur.
When capture count is set to V, a valid read occurs only if the
decoded data matches an entry in the match code table.