Appendices
MS-860 Industrial Raster Reader User’s Manual
A-33
Laser Framing. Setting scan width size by adjusting the on/off duration of the laser
beam.
Laser On/Off. When enabled, the laser is ON only during the read cycle, provided the
reader is enabled for a Serial or External trigger.
LED. Light emitting diode.
Level. The condition in which a read cycle initiated by a trigger signal from an object
detector remains active and ends when the object moves out of the detector’s range.
Longitudinal Redundancy Check (LRC). An error-checking routine that verifies the
accuracy of transmissions.
Master Symbol. A symbol or symbol data that is stored in a reader or reader’s mem-
ory and is compared with subsequently read symbols.
Master Reader. First reader in a daisy chain mode and linked directly to the host and
in tandem to secondary readers.
Matchcode. The ability to compare symbol data being scanned against a master sym-
bol that is stored in the memory of the reader.
Embedded Menu. Configuration options embedded in the reader’s erasable memory.
ESP Menu. Easy Setup Program. Configuration program that runs in Windows-based
operating systems 95 and above.
Mil. One thousandths of an inch or 0.0254 mm. In bar-coding, a measurement stan-
dard that identifies a symbol by the width of its narrowest element.
Mismatch. An event that occurs when the scanned symbol does not match the master
symbol that is stored in the memory of the reader.
Multisymbol. A reader mode which allows a reader to read more than one symbol in a
single read cycle.
Multidrop. A communications protocol for networking two or more readers or other
devices with a concentrator (or controller) and characterized by the use of individual
device addresses and the RS-485 standard.
Narrow-bar-width. The width of the narrowest bar of a specific bar code symbol,
expressed in thousands of an inch (or mils) as defined by standard code types.
Narrow Margins. Allows the reader to read symbols with quiet zones less than 8
times the width of the narrow bar element.
Non-delimited. A command that is not bracketed by pre-defined characters.
Noread. A non-read. A condition that occurs when the reader is set up to decode sym-
bols but no symbol is scanned during the read cycle.
Normally Closed. A discrete output state that is only active when open.
Normally Open. A discrete output state that is only active when closed.
NOVRAM. Non-volatile random access memory. Data that is “saved for power-on” is
saved to NOVRAM.
Null. Also spelled “Nul.” A non-printed ASCII character that acts as a space-holder.
Number of Decodes. The number of times a symbol is scanned by the reader during
one pass through the laser beam.
Object Detector. A photo electric device used to sense the presence or absence of an
object (also referred to as a package detector).
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