HP Value Serial/USB Receipt Printer II Manual de usuario descargar pdf (Pagina 20)

Chapter 2: Programming the Printer20

Chapter 2: Programming the Printer

Overview of commands

Commandscontrolalloperationsandfunctionsoftheprinter.Thisincludesselectingthesizeandplacementofcharacters

andgraphicsonthereceipttofeedingandcuttingthepaper.Theprogrammingcommandshavebeenorganized,inorderof

hexadecimalcodewithinfunctionalgroups.Forthisreason,“related”commandsmaynotbelistedadjacenttooneanother.

Theoperationofvariousprintersmaybeemulatedbythecommands,includingthefollowing:

• A793/A794

• Native

• LEGACY

Anyofthecommandsmaybeusedinanycombinationtoprogramahostcomputertocommunicatewiththeprinter

(unlessotherwisenoted).

Somecommandslistedanddescribedheremaynotbeimplementedandareidentiedas“notimplemented.”Ifreceived,

theyareignoredandnotsenttotheprintbufferasdata.

Anynonlegalcommandshavetheirparametersenttotheprintbufferasdata.

Comparison to A793

ThefollowingtabledetailsthelistofcommandswhosebehaviordiffersbetweentheA793,A794,andA798IIbecauseof

thephysicaldifferencesofa6dots/mmhead(A793)versusan8dots/mmhead(A794andA798II).

Command Description Dierence between previous product

and new product emulation mode.

15 n Feed n dot rows This command will move the paper on the receipt in

n/203 inch steps instead of n/152 inch steps.

16 n Add n extra dot rows The dot rows will be measured in n/203 inches versus

n/152 inches.

1B 20 n Set right-side character spacing This command sets the right side spacing to “n” horizontal

motion units. By default, these units are in terms of 1/203

inches versus 1/152 inches.

1B 24 n1 n2 Set absolute starting position For graphics commands, the position is scaled to best

match A793. In text mode, the equivalent character

position is calculated.

1B 26 s c1 c2 n1 d1...nn dn] Dene user-dened character set Since the dots on the A798II printhead are smaller, user

dened characters that were used on the previous printers

will appear smaller on the A798II printer.

1B 2A m n1 n2 d1...dn Select bit image mode In A793 emulation mode, graphics are scaled to best

match the size of the graphic in the A793 printer.

1B 33 n Set line spacing This command uses n in terms of n/360 inches. Since the

A793 had a fundamental step of 1/152 inch and the A798II

has a fundamental step of 1/203 inch, the actual line

spacing will not exactly match the requested spacing.

Continued...

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HP Value Serial/USB Receipt Printer II Manual de usuario Pagina 20