Worth Data 802 RF Betriebsanweisung PDF herunterladen (Seite 25)

Code 128

Code 128 is a very powerful bar code, combining an extensive character set

and variable length with compactness and error checking. The character set

contains all 128 ASCII characters with each character made up of three bars

and three spaces. Each element (bar or space) varies from one to four units

in width, totaling 11 units of width per character. Code 128 contains two lev-

els of error checking:

• Each character is checked for internal parity, and

• The last character is a checksum

Code 128 has three subsets, A, B and C:

• Subset A contains alphanumeric characters and unprintable

control characters

• Subset B contains alphanumeric characters plus printable control

characters and

• Subset C contains only numeric characters and uses a 2-character

encoding scheme to create a more compact bar code.

Code 128 uses an internal Mod 103 check character that is not displayed

by the bar code reader. Code 128 bar codes can be made up of only one

subset or may be a combination of several.

Exact specifications for Code 128 can be found at:

American National Standards Institute

Customer Service

11 West 42nd St.

New York, NY 10036

http://web.ansi.org

document ISO/IEC 15417:2000

See website for cost

1 2 ... 20 21 22 23 24 25 26 27 28

Keine Kommentare

Worth Data 802 RF Betriebsanweisung Seite 25