Allen-Bradley 2755 Uživatelský manuál stáhnout pdf (Strana 85)

Glossary G–7

find and replacement strings. There are both metacharacter search

and replacement characters.

misread

A condition which occurs when the data output of a reader does not

agree with the encoded data presented.

modulo check digit or character

A calculated character within a data field used for error detection.

The calculated character is determined by a modulus calculation on

the sum or the weighted sum of the data field contents.

MTBF

Mean Time Between Failure.

multi-drop link

1) A link that has more than 2 stations. 2) Contrasted with

point-to-point link.

NAK

Negative acknowledgement. An ASCII control character transmitted

by a receiver as a negative response to the sender.

network

A series of stations (nodes) connected by some type of

communication medium. A network may be made up of a single

link or multiple links.

no-match

An output condition in which decoded data does not match an entry

in the match code table.

no-read

An output condition in which bar codes on a package are not read

correctly or are incomplete (fields per package count not satisfied).

node

The connection point at which media access is provided.

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Allen-Bradley 2755 Uživatelský manuál Strana 85