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Epson A794-D100 manual RS-232C Technical Specifications, Communication Connectors, Power Connector

Models: A794-D100

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A794 Owner’s Guide

Chapter 5: Communication Interface

RS-232C Technical Specifications

This section describes the pin settings for the connectors and the RS-232C interface parameters. The RS-232C parameters are selected through the configuration menu feature. The RS-232C parameters must match those of the host computer.

For more information about	See these sections or documents
Configuration menu feature	A794 Owner’s Guide
RS-232C settings	“RS-232C Serial Interface Settings”
	in the A794 Service Guide

Communication Connectors

The following illustration shows the RS-232C communication connectors and pin assignments. The connectors are located at the rear of the printer, and are specified as male, DB9, 9-pin D-shell, and female DB25, 25-pin with RTS and CTS pins connected.

9-pin DB-9 Connector

25-pin DB-25 Connector

Function

Pin Numbers

Function

DSR 6

1 Not Used

Frame Ground & Shield

1

14

Not Used

2 RXD

Transmit Data

2

RTS 7

15

Not Used

3 TXD

Receive Data

3

CTS 8

16

Not Used

4 DTR

RTS

4

Not Used 9

17

Not Used

5 Logic Ground

CTS

5

18

Not Used

DSR

6

Shell-Frame Ground

19

Not Used

Logic Ground

7

20 DTR

Not Used

8

21 Not Used

Not Used

9

22 Not Used

Not Used 10

23 Not Used

Not Used 11

24 Not Used

Not Used 12

25 Not Used

Not Used 13

Power Connector

With RS-232C, the printer is always remotely powered. The following illustration shows the power cable connector and pin assignments. The power cable connector is a 3-pin mini DIN plug and is located at the rear of the printer.

Function Pin Numbers Function

Ground 2 3 Not Used

1 +24 Volts

Shell - Shield

March 1999

37

Image 43

Epson A794-D100 manual RS-232C Technical Specifications, Communication Connectors, Power Connector

Contents

Owners Guide Page Disclaimer Legal NoticesPower Supply Contents Programming Information Communication InterfaceFeatures Options InstallationsDescription of Printer Models Available Description of Printer Model Identification Models AvailableCommunication Interfaces Setting up the printer InstallationsOn a Flat Surface Vertically see note FeaturesOptions Printer Controls Changing Paper Testing the Printer Using the PrinterPrinter Controls Reset ButtonPaper Feed Button Tone Changing Paper A794 Owner’s Guide Paper jams Troubleshooting the Printer Testing the Printer Poorly printed test printout Troubleshooting the Printer Printer Tone and Green LED Troubleshooting the PrinterPrinter Does Not Work Printing ProblemsOrdering Miscellaneous Supplies Ordering Thermal PaperManufacturers Thermal Paper SpecificationsHow to Order Ordering Thermal PaperOrdering Miscellaneous Supplies Ordering Power Supply and Power CordOrdering Cash Drawers Wall-Mount Kit Ordering Communication CablesCharacters Paper Specifications Print ZonesCharacter Sets Standard CharactersPrint Modes SizePrint Zones Paper SpecificationsPrint Zones for 80 mm Paper Print Zones for 82.5 mm Paper Code Character SetsCode Code Code Code Code Code Code RS-232C Interface Communication OverviewCommunication Overview Sending CommandsUsing DOS to Send Commands Using Basic to Send CommandsPrint Speed and Timing RS-232C InterfaceDTR/DSR Protocol XON/XOFF ProtocolPin DB-9 Connector Pin DB-25 Connector RS-232C Technical SpecificationsCommunication Connectors Power ConnectorRS-232C Settings Cash Drawer ConnectorParallel Interface Ieee Bi-directional Parallel ConnectorCommunication Interface Programming Information List of Commands Comparisons Command DescriptionsProgramming Information List of Commands26 s c1 c2 n1 d1...nn dn NL nH 1D 2A n1 n2 d1...dn ComparisonsCommand Conventions Command DescriptionsHexadecimal Decimal Exceptions Printer Function CommandsClear Printer Perform Full Knife CutDecimal Formulas Perform Partial Knife CutGenerate Tone HexadecimalValue of n Select Print ModeSelect Peripheral Device for Multi-Drop Hexadecimal Decimal DefaultInitialize Printer Default of n Exceptions Select Paper Sensors to Output Paper End SignalsRange of n Select Sensors to Stop Printing Enable or Disable Panel ButtonValue of p1 Read from Non-Volatile MemoryGenerate Pulse to Open Cash Drawer Range of kValue of n2 Select Cut Mode and Cut PaperWrite to Non-Volatile Memory Nvram Value of n1Feed n Print Lines Vertical Positioning and Print CommandsPrint and Feed One Line Activate Carriage ReturnFeed n Dot Rows Range of n DefaultAdd n Extra Dot Rows Set Column PrintSet Line Spacing to 1/6 Inch Print and Feed Paper Set Line SpacingPrint and Feed n Lines Horizontal Tab Horizontal Positioning CommandsSet Right-Side Character Spacing Set Absolute Starting Position Set Horizontal Tab Positions Value of k DefaultSet Relative Print Position Compatibility Information A794 receipt vs. A793 receipt Select JustificationRange of nL Set Left MarginRange of nH GS P x y Set Horizontal and Vertical Minimum Motion UnitsSet Printing Area Width Select Double-Wide Characters Print Characteristics CommandsSelect Single-Wide Characters Select Pitch Column Width Select 90 Degree Counter-Clockwise Rotated PrintHexadecimal Decimal Related Information Select Character Set Values and Ranges Define User-Defined Character SetSelect or Cancel Underline Mode Copy Character Set from ROM to RAM Cancel User-Defined CharacterESC 0 0 Select or Cancel Double Strike Select or Cancel Emphasized ModeSelect Character Code Table Select or Cancel Italic PrintSelect or Cancel Upside-Down Print Mode Select or Cancel 90 Degree Clockwise Rotated PrintSelect International Character Set Select or Cancel Smoothing Mode Select Or Cancel White/Black Reverse Print ModeSummary of Rotated Printing Select Superscript or Subscript ModesHexadecimal Decimal Value Graphics CommandsPrint Raster Graphics Download BMP Logo= Number of dots to be moved from the beginning of the line Select Bit Image Mode Select Single-Density Graphics Select Double-Density Graphics Select the Current Logo Ranges Define Downloaded Bit ImageValue and Range of m Print Downloaded Bit ImageConvert 6 Dots/mm Bitmap to 8 Dots/mm Bitmap Hexadecimal 1D 2F m DecimalPrinter Status Commands Transmit Peripheral Device Status RS-232C printers only Request Alternate Status parallel printers onlyHexadecimal Decimal Values Transmit Paper Sensor StatusHexadecimal 1D 49 n Decimal Transmit Printer IDValues of n Transmit Printer ID, Remote Diagnostics ExtensionProgramming Information A794 Owner’s Guide Select or Cancel Automatic Status Back ASB Default ASB disabled Exceptions Undefined Off Not used. Fixed to off Transmit Status When n is out of the specified range, the command is ignored Print Test Form Send Printer Software VersionAX t Rules for Using Real Time Commands Real Time CommandsMoving Data through the Buffer Busy Line and Fault ConditionsRecognizing Data from the Printer Real Time Request to Printer Related Information = Transmit Printer Status Real Time Status Transmission= Transmit RS-232C Busy Status = Transmit Error Status= Transmit Receipt Paper Status Hexadecimal Decimal Value of Byte Real Time Printer Status TransmissionSelect Printing Position of HRI Characters Bar Code CommandsSelect Pitch of HRI Characters Print Bar Code Select Bar Code HeightUPC-A Select Bar Code Width Default FormulasHexadecimal 0C Decimal Exceptions Mode CommandsPrint and Return to Standard Mode Cancel Print Data in Page ModeHexadecimal 1B 4C Decimal Exceptions Print Data in Page ModeSelect Page Mode Hexadecimal 1B 0C Decimal ExceptionsAscii ESC S Select Standard ModeDefault Exceptions Select Print Direction in Page ModeSet Print Area in Page Mode Select Character Size Set Absolute Vertical Print Position in Page Mode Set Relative Vertical Print Position in Page Mode Select or Cancel Macro Definition Macro CommandsHexadecimal 1D 3A Decimal Formulas Value of r Execute MacroValue of t Printer operation Flash Download CommandsESC Switch to Flash Download ModeReturn Boot Sector Firmware Part Number Return Segment Number Status of Flash MemoryRange of n Exceptions Return Boot Sector CRCSelect Flash Memory Sector to Download Get Firmware CRCReturn Main Program Flash CRC Erase All Flash Contents Except Boot SectorErase Selected Flash Sector Ch * 256 + cl Ffff hexadecimal Download to Active Flash SectorMarch 127 Erase User Flash Sector Reset FirmwareBasic Index130 March March 131 132 March