RS-232C Settings, Xon/Xoff, Dtr/Dsr | M-S Cash Drawer A794 specification

A794 Owner’s Guide

Chapter 5: Communication Interface

RS-232C Settings

The printer supports the standard RS-232C settings:

Baud Rate	1200, 2400, 4800, 9600,	19.2 K,	38.4 K, 57.6 K, 115.2 K
Parity	Parity Enabled, Parity Disabled,		Even Parity, Odd Parity
Flow Control Method	XON/XOFF, DTR/DSR
Data Reception Errors	Print “?” for Data Errors,	Ignore Data Errors

Generally the printer is shipped with all the RS-232C parameters pre-set at the factory. If you need to change any of these settings, you can do so using the configuration menu feature.

This feature prints instructions on the receipt for changing the RS-232C settings (in addition to other settings).

For more information about	See this section
Changing the RS-232C settings	“Diagnostics and Configuration”
through the configuration menu	in the A794 Service Guide

December 1999

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M-S Cash Drawer A794 manual RS-232C Settings, Xon/Xoff, Dtr/Dsr

Contents

Owners Guide Legal Notices Disclaimer Power Supply Contents Communication Interface Programming Information Description of Printer Models Available Features OptionsModel Identification Communication Interfaces Description of Printer Model Identification Models AvailableCommunication Interfaces Features Options Choose a Location Unpack the PrinterConnect the Cables A794 Thermal Receipt Printer Setup Guide Unpack the Printer Remove the Starter Paper Roll Supports Setting up the printer Choose a LocationOn a Flat Surface On a Wall Connect the Cables Communication Cable Power Supply Cable Cash Drawer Cables Reset Button Printer ControlsPaper Feed Button LED Tone Loading Receipt Paper To Load the Paper Using the Printer Paper jams Troubleshooting the Printer Configuring the Printer To start the test Poorly printed test printout Troubleshooting the Printer Troubleshooting the Printer Printer Tone and Green LED Printing Problems Changing this settingPrinter Does Not Function USE Caution when This page intentionally left blank Ordering Thermal Paper Thermal Paper Specifications Manufacturers How to OrderOrdering Miscellaneous Supplies Thermal Paper Specifications How to OrderOrdering Thermal Paper Manufacturers Ordering Miscellaneous Supplies Ordering Power Supply and Power CordOrdering Cash Drawers Ordering Communication Cables Wall-Mount Kit Paper Specifications Print Zones CharactersPrint Modes Size Print Zones for 80 mm Paper Print Zones for 82.5 mm Paper Characters Print ModesSize Standard Print Zones Paper SpecificationsPrint Zones for 80 mm Paper Print Specifications Print Zones for 82.5 mm Paper Print Density and Density of Receipt Print Lines To change the Print Density Duty Cycle Restrictions Printing Solid Blocks Character Sets Code Code Code Code Code Code Code Code Code Interface Sending Commands Communication OverviewRS-232C Interface Parallel Interface Sending Commands Using DOS to Send CommandsUsing Basic to Send Commands Communication Overview RS-232C Interface Print Speed and Timing XON/XOFF Protocol RS-232C Technical Specifications Communication ConnectorsPin DB-9 Connector Pin DB-25 Connector DTR/DSR Protocol Power Connector Cash Drawer Connector RS-232C Settings XON/XOFF, DTR/DSR Ieee Bi-directional Parallel Connector Parallel Interface Comparisons Command Descriptions Command Conventions List of Commands and LocationsBy Command Code By Function Command Conventions Ascii List of Commands and Location By Command Code 1B 2D n Select or Cancel Underline Mode 1B 49 n Select or Cancel Italic Print1B 4C Select Page Mode 1B 54 n Select Print Direction in Page Mode 1D 3A Select or Cancel Macro Definition 1D 42 n Select or Cancel White/Black Reverse Print Mode1D 21 n Select Character Size 1D 22 55 n1 n2 Flash Memory User Sectors Allocation Print Bar Code 04 n Convert 6 Dots/mm Bitmap to 8 Dots/mm Bitmap05 n Select Superscript or Subscript Modes Print Test Form Printer Function Commands Vertical Positioning and Print CommandsBy Function Perform Partial Knife Cut Horizontal Positioning Commands Print Characteristic Commands1B 74 n Select International Character Set 1F 05 n Select Superscript or Subscript Modes Status Commands Graphics Commands1F 04 n Convert 6 Dots/mm Bitmap to 8 Dots/mm 100 Barcode Commands Mode CommandsMacro Commands User Data Storage Commands Flash Download Commands Comparisons 24 n1 n2 Command Descriptions Printer Function CommandsClear Printer Perform Full Knife Cut Perform Partial Knife Cut Generate ToneSelect Peripheral Device for Multi-Drop Ascii ESC BEL Hexadecimal Decimal Default Initialize Printer Default of n Select Paper Sensors to Output Paper End SignalsRange of n Enable or Disable Panel Button Select Sensors to Stop Printing Select Cut Mode and Cut Paper Generate Pulse to Open Cash DrawerValue of p1 Value of p2 Print Test Form AX t Vertical Positioning and Print Commands Print and Feed One LineActivate Carriage Return Feed n Print Lines Feed n Dot Rows Range of n DefaultAdd n Extra Dot Rows Print Set Line Spacing to 1/6 InchSet Line Spacing Ascii ETB Print and Feed Paper Print and Feed n LinesSet Horizontal and Vertical Minimum Motion Units GS P x y Horizontal Positioning Commands Horizontal TabSet Column Ascii HT Set Absolute Starting Position Compatibility Information A794 receipt vs. A793 receipt Value of k Default Set Horizontal Tab Positions Set Relative Print Position To move to the left Select Justification Set Left Margin GS L nL nH Set Printing Area Width Print Characteristics Commands Select Double-Wide CharactersSelect Single-Wide Characters Ascii DC2 Select Pitch Column Width Select 90 Degree Counter-Clockwise Rotated PrintAscii ESC DC2 Set Right-Side Character Spacing Select Print Mode Select or Cancel User-Defined Character Set Define User-Defined Character SetException Values and Ranges Select or Cancel Underline Mode Cancel User-Defined Character Copy Character Set from ROM to RAMESC 0 0 ESC ? n Select or Cancel Emphasized Mode Select or Cancel Double Strike 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 White/Black Reverse Print Mode Select or Cancel Smoothing Mode Select Superscript or Subscript Modes Summary of Rotated Printing Graphics Commands Print Raster Graphics Download BMP Logo Select Bit Image Mode Dot Single-Density Mode Print Advanced Raster Graghics Select Single-Density GraphicsValue of r Data bytes Select Double-Density Graphics Select the Current Logo Define Downloaded Bit Image Print Downloaded Bit Image Convert 6 Dots/mm Bitmap to 8 Dots/mm BitmapHexadecimal 1D 2F m Decimal Value and Range of m Status Command Introduction Status CommandsBatch Mode Transmit Peripheral Device Status RS-232C printers only ESC uHexadecimal 1B 75 Decimal 27 117 Value of returned byte Hexadecimal 1B 75 n Decimal Transmit Paper Sensor Status Hexadecimal Decimal Values Transmit Printer ID Transmit Printer ID, Remote Diagnostics Extension Values of n Programming Information A794 Owner’s Guide December 107 Undefined. Fixed to off Send Printer Software Version Preferred Implementation Real Time CommandsAlternate Implementation Rules for Using Real Time Commands Moving Data through the Buffer Real Time Status Transmission Busy Line and Fault ConditionsRelated Information = Transmit Printer Status = Transmit Error Status = Transmit RS-232C Busy Status = Transmit Receipt Paper Status Real Time Request to Printer Ascii GS ENQ Real Time Printer Status TransmissionValue of Byte Select or Cancel Automatic Status Back ASB Auto Status Back 118 December December 119 Recognizing Data from the Printer Bar Code Commands Select Printing Position of HRI CharactersSelect Pitch of HRI Characters Select Bar Code Height Print Bar Code GS k m n d1…dn 1D 6B m n d1…dn 29 107 m n d1…dn Select Bar Code Width CODE39 Mode Commands Print and Return to Standard ModeCancel Print Data in Page Mode Ascii FF Print Data in Page Mode Select Page ModeAscii ESC FF Ascii ESC L Select Print Direction in Page Mode Select Standard ModeAscii ESC S Set Print Area in Page Mode N1-4 = N5 = N6 = N7 = N8 = 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 Execute Macro Value of t User Data Storage Commands Write to User Data StorageRead from User Data Storage Read from Non-Volatile Memory December 133 Erase User Flash Sector Flash Memory User Sectors AllocationGS U n1 n Flash Download Commands Switch to Flash Download ModePrinter operation ESC Return Boot Sector Firmware Part Number Return Segment Number Status of Flash MemorySelect Flash Memory Sector to Download Get Firmware CRC Erase All Flash Contents Except Boot Sector Return Microprocessor CRCReturn Main Program Flash CRC Erase Selected Flash Sector Reset Firmware Download to Active Flash SectorAscii GS Space 1D FF Index Basic DOS December 141