Microscan MS-4X Manual do Utilizador descarregar pdf (Página 302)

Appendix Q

A-46 MS-880 Industrial Long Range Scanner User’s Manual

Appendices

Mil. One thousandths of an inch or 0.0254 mm. In bar-coding, a measurement stan-

dard 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 scanner.

Multilabel. A scanner mode which allows a scanner to read more than one bar code

label in a single read cycle.

Multidrop. A communications protocol for networking two or more scanners 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 given label, expressed in

thousands of an inch (or mils).

Narrow Margins. Allows the scanner 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.

Non-volatile RAM (NOVRAM). Random Access Memory that is available on power-

on; that is, after power to the unit has been recycled.

Noread. A non-read. A condition that occurs when the scanner is set up to decode

labels but no label 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.

Number of Decodes. The number of times a bar code label is scanned by the scan-

ner 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).

Output. A channel or communications line. Data or discrete signals that are transmit-

ted or displayed by a device.

Output Format. The modification of data output according to a user-defined index

of Extraction and Insertion commands.

Parity. An error detection routine in which one data bit in each character is set to 1 or

0 (zero) so that the total number of 1 bits in the data field is even or odd.

Picket Fence Label Orientation. A bar code label in which the bars are perpendicu-

lar to the label’s direction of travel.

Pitch. Label (or scanner) rotation around the center of a line perpendicular to the

label’s bars.

Point-to-Point. A protocol consisting of a single communications event, typically

used to connect a bar code scanner to a terminal or host computer.

Port. Logical circuit for data entry and exit. (One or more ports may be included

within a single connector.)

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