HP Value Serial/USB Receipt Printer II Manual de usuario descargar pdf (Pagina 97)

Chapter 3: Programming Commands 97

row 1

row 2

row 3

row 4

row 5

row 6

Start Pattern

Left Row Indicator

Code words

Data Character

Code words

Right Row Indicator

Code words

Stop Pattern

Therearethreemutuallyexclusivesetsofsymbolpatterns,orclusters,eachhaving929distinctpatterns.Becausedifferent

clustersareusedforadjacentrows,itispossibleforthedecodertotellifthescanningpathiscrossingrowboundaries

without the use of separator bars.

Sample symbol description:

EachPDF417symbolconsistsof3to90stackedrowssurroundedonallfoursidesbyaquietzone.Eachrowcontains:

1 Leadingquietzone

2 Startpattern

3 Leftrowindicatorcharacters(codewords)

4 Onetothirtydatacharacters(codewords)

5 Rightrowindicatorcharacter(codewords)

6 Stoppattern

7 Trailingquietzone

Thenumberofcharactersinarowandnumberofrowscanbeadjustedtovarythesymbol’soverallaspectratiotobestt

an available space.

Eachrowhasaleftandrightrowindicatorwithadataregionbetween.Theleft-mostcharacterinthetoprowofthedata

regionisthetotalnumberofcharactersinthedataregion,excludingerrorcorrectioncharacters.Characterswithinthedata

regionaredesignedtobereadfromlefttoright,startingonthetoprow,immediatelyafterthelength-deningcharacter.

Themaximumcharactersinthedataregionare928.

Related Information:

The“Setbarcodewidth”command(1D77n)affectsthexdimensionandrowheightforPDF417.Seechartbelow.

n value x dimension row height

2 2 7

3 3 10

4 4 13

5 5 17

6 6 20

Select bar code width

ASCII GS w n

Hexadecimal 1D 77 n

Decimal 29 119 n

Value of n: 2, 3, 4, 5, 6

Default: n=3

Setsthebarcodewidthtondotsuntiltheprinterisinitialized,reset,orpoweredoff.Ifthebarcodeistoowideforthe

printingarea,thebarcodewillnotprint.

Formulas

n/8mm(n/203inch)

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 154 155

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