HP Value Serial/USB Receipt Printer II Manual do Utilizador descarregar pdf (Página 43)

Chapter 3: Programming Commands 43

Set printing area width

ASCII GS W nL nH

Hexadecimal 1D 57 nL nH

Decimal 29 87 nL nH

Range of nL: 0–255

Range of nH: 0–255

Default: 576 dots (the maximum printable area)

Setsthewidthoftheprintingareauntiltheprinterisinitialized,reset,orpoweredoff.Ifthesettingexceedstheprintable

area,themaximumvalueoftheprintableareaisused.Iftheleftmarginandprintingareasetthewidthtolessthanthe

widthofasinglecharacter,thewidthisextendedotaccommodatethecharacterfortheline.Thewidthoftheprintingarea

issetto((nH X 256)+nL)timeshorizontalmotionunit)inches.Thehorizontalmotionunitsaresetbythesethorizontal

andverticalminimummotionunitscommand(1D50).Ifthehorizontalmotionunitischangedafterchangingprinting

areawidth,theprintingareawidthsettingisnotchanged.

Thewidthoftheprintingareafollowsthesetleftmargincommand(1D4C).Seethesetleftmargincommand(104C…)

earlier in this document for a description.

Formulas

Tosetthewidthoftheprintingareatooneinchatthedefaulthorizontalmotionunitof1/203inches,sendthefour-byte

string:

GS W 203 0

Or,tosetthewidthoftheprintingareatotwoinchesatthedefaulthorizontalmotionunitof1/203unitsperinch,sendthe

four-bytestring:

GS W 150 1

Where2inches=406/203,and406=(1X256)+150.

Exceptions

Thiscommandiseffectiveonlyatthebeginningofaline.

Ifthesettingexceedstheprintablearea,themaximumvalueoftheprintableareaisused.Themaximumprintableareais

576dots.Seetheillustration.

Ifthiscommandisprocessedinpagemode,printingareawidthisnotchangeduntiltheprinterisreturnedtostandard

mode.











Exceptions:

Thecommandiseffectiveonlyatthebeginningofaline.Thiscommandisignoredifthelinebufferisnotempty.

Ifthiscommandisprocessedinpagemode,leftmarginisnotchangeduntiltheprinterisreturnedtostandardmode.

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HP Value Serial/USB Receipt Printer II Manual do Utilizador Página 43