Description of Printer

Chapter 1: About the Printer

A794 Owner’s Guide

The A794 thermal receipt printer is extremely fast, quiet, and very reliable. With thermal printing technology, there is no ribbon cassette to change, and paper loading is extremely simple. The printer is small enough to fit almost anywhere and is easy to use with the receipt exiting from the top. There is no journal as it is kept electronically by the host system.

Rear

Cover

Top Cover

Assembly

LED (Green)

Paper Feed

Button

Reset

Button

Base

Communication

Connector

(RS-232C 9-pin DB-9

Connector shown)

6-pin Cash Drawer

Connector

Back of

Power

DIP

Printer

Connector

Switches

Connector Cover

2	December 1999

Page 7

Image 7

M-S Cash Drawer A794 manual Description of Printer

Contents

Owners Guide Disclaimer Legal Notices Power Supply Contents Programming Information Communication Interface Description of Printer Models Available Features OptionsModel Identification Communication Interfaces Description of Printer Model Identification Models AvailableCommunication Interfaces Options Features Choose a Location Unpack the PrinterConnect the Cables Unpack the Printer A794 Thermal Receipt Printer Setup Guide Remove the Starter Paper Roll Supports On a Wall Setting up the printerChoose a Location On a Flat Surface Communication Cable Connect the Cables Cash Drawer Cables Power Supply Cable LED Reset ButtonPrinter Controls Paper Feed Button Tone To Load the Paper Loading Receipt Paper Using the Printer Paper jams Troubleshooting the Printer To start the test Configuring the Printer Poorly printed test printout Troubleshooting the Printer Printer Tone and Green LED Troubleshooting the Printer USE Caution when Printing ProblemsChanging this setting Printer Does Not Function This page intentionally left blank Ordering Thermal Paper Thermal Paper Specifications Manufacturers How to OrderOrdering Miscellaneous Supplies Manufacturers Thermal Paper SpecificationsHow to Order Ordering Thermal Paper Ordering Miscellaneous Supplies Ordering Power Supply and Power CordOrdering Cash Drawers Wall-Mount Kit Ordering Communication Cables Print Zones for 80 mm Paper Print Zones for 82.5 mm Paper Paper Specifications Print ZonesCharacters Print Modes Size Standard CharactersPrint Modes Size Print Zones Paper SpecificationsPrint Zones for 80 mm Paper Print Specifications Print Zones for 82.5 mm Paper To change the Print Density Print Density and Density of Receipt Print Lines Duty Cycle Restrictions Printing Solid Blocks Code Character Sets Code Code Code Code Code Code Code Code Parallel Interface Interface Sending CommandsCommunication Overview RS-232C Interface Communication Overview Sending CommandsUsing DOS to Send Commands Using Basic to Send Commands Print Speed and Timing RS-232C Interface XON/XOFF Protocol DTR/DSR Protocol RS-232C Technical SpecificationsCommunication Connectors Pin DB-9 Connector Pin DB-25 Connector Cash Drawer Connector Power Connector XON/XOFF, DTR/DSR RS-232C Settings Parallel Interface Ieee Bi-directional Parallel Connector Comparisons Command Descriptions Command Conventions List of Commands and LocationsBy Command Code By Function Ascii Command Conventions By Command Code List of Commands and Location 1B 54 n Select Print Direction in Page Mode 1B 2D n Select or Cancel Underline Mode1B 49 n Select or Cancel Italic Print 1B 4C Select Page Mode 1D 22 55 n1 n2 Flash Memory User Sectors Allocation 1D 3A Select or Cancel Macro Definition1D 42 n Select or Cancel White/Black Reverse Print Mode 1D 21 n Select Character Size Print Test Form Print Bar Code04 n Convert 6 Dots/mm Bitmap to 8 Dots/mm Bitmap 05 n Select Superscript or Subscript Modes Perform Partial Knife Cut Printer Function CommandsVertical Positioning and Print Commands By Function 1F 05 n Select Superscript or Subscript Modes Horizontal Positioning CommandsPrint Characteristic Commands 1B 74 n Select International Character Set Status Commands Graphics Commands1F 04 n Convert 6 Dots/mm Bitmap to 8 Dots/mm 100 User Data Storage Commands Barcode CommandsMode Commands Macro Commands Flash Download Commands 24 n1 n2 Comparisons Perform Full Knife Cut Command DescriptionsPrinter Function Commands Clear Printer Ascii ESC BEL Perform Partial Knife CutGenerate Tone Select Peripheral Device for Multi-Drop Initialize Printer Hexadecimal Decimal Default Default of n Select Paper Sensors to Output Paper End SignalsRange of n Select Sensors to Stop Printing Enable or Disable Panel Button Value of p2 Select Cut Mode and Cut PaperGenerate Pulse to Open Cash Drawer Value of p1 AX t Print Test Form Feed n Print Lines Vertical Positioning and Print CommandsPrint and Feed One Line Activate Carriage Return Feed n Dot Rows Range of n DefaultAdd n Extra Dot Rows Ascii ETB PrintSet Line Spacing to 1/6 Inch Set Line Spacing GS P x y Print and Feed PaperPrint and Feed n Lines Set Horizontal and Vertical Minimum Motion Units Ascii HT Horizontal Positioning CommandsHorizontal Tab Set Column Compatibility Information A794 receipt vs. A793 receipt Set Absolute Starting Position Set Horizontal Tab Positions Value of k Default To move to the left Set Relative Print Position Select Justification GS L nL nH Set Left Margin Set Printing Area Width Ascii DC2 Print Characteristics CommandsSelect Double-Wide Characters Select Single-Wide Characters Select Pitch Column Width Select 90 Degree Counter-Clockwise Rotated PrintAscii ESC DC2 Set Right-Side Character Spacing Select Print Mode Values and Ranges Select or Cancel User-Defined Character SetDefine User-Defined Character Set Exception Select or Cancel Underline Mode ESC ? n Cancel User-Defined CharacterCopy Character Set from ROM to RAM ESC 0 0 Select or Cancel Double Strike Select or Cancel Emphasized Mode Select or Cancel Italic Print Select or Cancel Upside Down Print Mode Select or Cancel 90 Degree Clockwise Rotated PrintSelect Character Size Normal Select or Cancel Smoothing Mode Select Or Cancel White/Black Reverse Print Mode Summary of Rotated Printing Select Superscript or Subscript Modes Print Raster Graphics Graphics Commands Download BMP Logo Select Bit Image Mode Dot Single-Density Mode Data bytes Print Advanced Raster GraghicsSelect Single-Density Graphics Value of r Select Double-Density Graphics Select the Current Logo Define Downloaded Bit Image Value and Range of m Print Downloaded Bit ImageConvert 6 Dots/mm Bitmap to 8 Dots/mm Bitmap Hexadecimal 1D 2F m Decimal Status Command Introduction Status CommandsBatch Mode Hexadecimal 1B 75 n Decimal Transmit Peripheral Device Status RS-232C printers onlyESC u Hexadecimal 1B 75 Decimal 27 117 Value of returned byte Hexadecimal Decimal Values Transmit Paper Sensor Status Transmit Printer ID Values of n Transmit Printer ID, Remote Diagnostics Extension Programming Information A794 Owner’s Guide December 107 Undefined. Fixed to off Send Printer Software Version Preferred Implementation Real Time CommandsAlternate Implementation Moving Data through the Buffer Rules for Using Real Time Commands Real Time Status Transmission Busy Line and Fault ConditionsRelated Information = Transmit Printer Status = Transmit RS-232C Busy Status = Transmit Error Status = Transmit Receipt Paper Status Real Time Request to Printer Ascii GS ENQ Real Time Printer Status TransmissionValue of Byte Auto Status Back Select or Cancel Automatic Status Back ASB 118 December December 119 Recognizing Data from the Printer Select Bar Code Height Bar Code CommandsSelect Printing Position of HRI Characters Select Pitch of HRI Characters GS k m n d1…dn 1D 6B m n d1…dn 29 107 m n d1…dn Print Bar Code CODE39 Select Bar Code Width Ascii FF Mode CommandsPrint and Return to Standard Mode Cancel Print Data in Page Mode Ascii ESC L Print Data in Page ModeSelect Page Mode Ascii ESC FF Select Print Direction in Page Mode Select Standard ModeAscii ESC S N1-4 = N5 = N6 = N7 = N8 = Set Print Area in Page Mode 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 Value of t Execute Macro Read from Non-Volatile Memory User Data Storage CommandsWrite to User Data Storage Read from User Data Storage December 133 Erase User Flash Sector Flash Memory User Sectors AllocationGS U n1 n ESC Flash Download CommandsSwitch to Flash Download Mode Printer operation Get Firmware CRC Return Boot Sector Firmware Part NumberReturn Segment Number Status of Flash Memory Select Flash Memory Sector to Download Erase Selected Flash Sector Erase All Flash Contents Except Boot SectorReturn Microprocessor CRC Return Main Program Flash CRC 1D FF Reset FirmwareDownload to Active Flash Sector Ascii GS Space Basic Index DOS December 141