Rockwell Automation 2755 AtomScan Bar Code Reader - Manual (Page 137)

Glossary G–2
Publication 2755-6.9
Good Read – The event that occurs when a label’s data is accurately
scanned and decoded.
Intercharacter Gap – The extra space between the last element of
one character and the first element of the adjacent character of a
specific bar code symbol.
Label Height – Regardless of orientation, the measurement taken
along the length of a label’s individual bars.
Label Length – Regardless of orientation, the measurement taken
across the label’s bars from one end to the other, including the quiet
zone.
Label Speed – The rate in inches or centimeters per second at which
a label moves through the scan beam.
Label Transitions – The transition of bars and spaces on a label,
used by the MS-sensor to detect the presence of a label on a package.
Ladder Label Orientation – A bar code label in which the bars are
parallel to the label’s direction of travel.
Match Code – The ability to compare bar code labels being scanned
against a master label that is stored in the memory of the reader.
Menu Configuration – The process of changing factory default
settings via a sequence of menus displayed on a terminal monitor.
Mil – One thousandths of an inch or 0.0254 mm. In bar-coding, a
measurement that identifies a bar code label by the width of its
narrowest element.
Mismatch – An event that occurs when the scanned bar code label
does not match the master label that is stored in the memory of the
reader.
Narrow-bar-width – The width of the narrowest bar of a given
label, expressed in thousands of an inch (or mils).
Non-volatile RAM (NOVRAM) – Random Access Memory that is
available on power-on; that is, after power to the unit has been
recycled.
No Read – A non-read. A condition that occurs when the reader is
set up to decode labels, and no labels are decoded during the read
cycle.
Number of Scans Calculation – The number of times a bar code
label is scanned by the reader during one pass through the laser
beam.