Datalogic AV7000, Reference Manual

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Local No Read
A configurable No Read message associated with each individual code enabled in the
Barcode Settings Table .
Parameter
A value that you specify to a program. Typically parameters are set to configure a device to
have particular operating characteristics.
Position
The position of a barcode reader or light source in relation to the target of a receiving
element.
Protocol
A formal set of conventions governing the formatting and relative timing of message
exchange between two communicating systems. Protocol is used to get a message from
third party equipment such as a scale or sorter. The message can then be attached to the
barcode message output from the system.
Resolution
The narrowest element dimension which can be distinguished by a particular reading device
or printed with a particular device or method.
RS232
Interface between data terminal equipment and data communication equipment employing
serial binary data interchange.
RS422
Interface that specifies the electrical characteristics of generators and receivers for use in
balanced digital multipoint systems such as on a Multidrop line.
Reader
A device that examines a printed pattern (barcode) and either passes the uninterpreted data
to a decoder or decodes the data and passes it onto the Host system.
Serial Port
An I/O port used to connect a barcode reader to your computer.
Signal
An impulse or fluctuating electrical quantity (i.e.: a voltage or current) the variations of which
represent changes in information.
Space
As pertaining to Barcodes, is the blank area between the dark bars.
Symbol
A combination of characters including start/stop and checksum characters, as required, that
form a complete scannable barcode.
Trigger Signal
A signal, typically provided by a photoelectric sensor or proximity switch, which informs the
barcode reader of the presence of an object within its reading zone.
UPC
Acronym for Universal Product Code. The standard barcode type for retail food
packaging in the United StatesIndex