User's Manual

Bar Code SymbologiesAppendix —B
410 700 Series Color Mob ile Computer User’s Manual
MSI Code (Variant of Plessey)
The MSI Plessey bar code is a variant of the Plessey bar code. It is a pulse-
width modulated non-self checking code, and is used primarily in store
shelf labeling. Each character consists of eight elements, four bars and four
spaces. The character set includes the digits 0 through 9. A Modulo 10
checksum is appended to the end of the code. For start and stop checks,
MSI employs a single bit pair of 1 as a start symbol and a single bit pair of
0 as a stop symbol. MSI re verses the 1-2-4-8 BCD pattern f or bit pair
weighting to 8-6-2-1.
QR Co de (Quick Response Code)
QR Code is a 2D matrix symbology containing dark and light square data
modules. It has position detection patterns on three of its for corners and
features direct encodation of the Japanese Kana-Kanji character set. A 2D
imaging device such as a CCD camera is necessary to scan the symbology.
QR Code is designed with selectable levels of error correction. It supports
industry standard escape sequences to define international code pages and
special encodation schemes. QR Code is used for small item marking ap-
plications using a wide variety of printing and marking technologies. This
document includes descriptions of the character encodation, symbol struc-
ture, reference decode algorithm, and symbol quality measurements for
QR Code.
S2of5(Standard 2 of 5)
The code S 2 of 5 (Standard 2 of 5 Code) is designed primarily for:
S Warehouse inventory handling
S Identification of photo finishing envelopes
S Airline tickets
S Baggage and cargo handling
The code S 2 of 5 is simple and straightforward. All information is con-
tained in the widths of the bars, with the spaces serving only to separate
the individual bars.
Bars can either be wide or narrow, and the wide bars are usually three
times the widths of the narrow bars. Spaces may be any reasonable width
but are typically equal to the narrow bars. Narrow bars are identified as
zero bits and wide bars as one bits.
Remember the code structure by associating the bar positions from left to
rightwithweightingfactors1,2,4,7,andparity.Exceptionstothisrule
are zero, start, and stop. This code is a discrete code, since the white spaces
between the characters are not part of the code. Because the white spaces
carry no information, their dimensions are not critical.
The S 2 of 5 code is self-checking, meaning a scanner passing through a
printing void would detect the proper ratio of wide bars to total bars.
When the scanner spots an error, a non-read will occur.