HP Value Serial/USB Receipt Printer II Bedienungsanleitung PDF herunterladen (Seite 77)

Chapter 3: Programming Commands 77

Toguardagainstthissituation,theapplicationmustdeterminethecauseofabusyconditionandtakeappropriateactionor

pacetherealtimecommandstoavoidllingthebuffer.Thereisaminimumof256bytesavailableintheprinter’sbuffer

whenitgoesbusy.

Busy line and fault conditions

Iftheprinterisinerrorcondition(coverisopen,paperisexhausted…),theprinterwillstillacceptdata,respondtothe

batchmodestatuscommands(1B76and1B750),handlethecashdrawercommands,andnotgobusyuntilitactually

triestoexecuteaprintcommand.Thenitwillstaybusyandstopprocessingdataoutofthereceivebufferuntilthe

conditionclears.Itwillrespondtotherealtimecommandsasdescribedbelow.

Real time status transmission

GS sequence DLE sequence

ASCII GS EOT n DLE EOT n

Hexadecimal 1D 04 n 10 04 n

Decimal 29 4 n 16 4 n

Value of n: GS/DLE sequence

1 = Transmit printer status

2 = Transmit RS-232C busy status

3 = Transmit error status

4 = Transmit receipt paper status

Transmitstheselectedonebyteprinterstatusspeciedbyn in real time according to the following parameters. This

commandincludestwosequences:GS(1D)andDLE(0x10).Thiscommandcanbedisabledusing1F7A.

Exceptions

The command is ignored if n is out of range.

AnapplicationusingDLE(0x10)sequencemustsendEOTwithin100millisecondsofDLEortheprinterwillmisinterpret

theDLEandexecuteaclearprintercommand.AvoidthispossibilitybyusingtheID04nsequence,whichishandled

exactlythesameas1004n.

UnliketheA793,thathadadedicatedconnectorandresultantdedicatedstatusreportingforeachcashdrawer,theA798II

hasasingleconnectorthatsharesdatareportingfromeithercashdrawer.Wheneithercashdrawerisopen,anopenstatus

isreportedbytheprinter.

Related information

1 = Transmit printer status

Bit Status Hex Decimal Function

0 O 00 0 Fixed to O.

1 On 02 2 Fixed to On.

2 O 00 0 One or both cash drawers open.

On 04 4 Both cash drawers closed.

3 O 00 0 Not busy at the RS-232C interface.

On 08 8 Printer is busy at the RS-232C interface.

4 On 10 16 Fixed to on.

5 Undened.

6 Undened.

7 O 00 0 Fixed to o.

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HP Value Serial/USB Receipt Printer II Bedienungsanleitung Seite 77