XON/XOFF Protocol, DTR/DSR Protocol | M-S Cash Drawer 7193 instruction

7193 Owner’s Guide

Communication

XON/XOFF Protocol

The XON/XOFF characters coordinate the information transfer between the printer and the host system. The printer sends an XON character when it is ready to receive data and it sends an XOFF character when it cannot accept any more data. The software on the host system must monitor the communication link as shown in the following flowchart in order to send data at the appropriate times.

13 HEX

Was an XON XOFF or XOFF charactor

last received?

XON

11HEX

Send Data

Wait for

XON character

XON character = Hex 11.

XOFF character = Hex 13.

DTR/DSR Protocol

The DTR signal is used to control data transmission to the printer. It is driven low when the printer is ready to recieve data and driven high when it cannot accept any more data. Data is transmitted from the printer after it confirms that the DSR signal is low.

Is DTR	High
Is DTR
High or Low

Wait for

DTR to Go Low

Low

Send Data

May 1996

Image 51

M-S Cash Drawer 7193 manual XON/XOFF Protocol, DTR/DSR Protocol

Contents

Owners Guide Information to User Quick Reference How to Use This Book How to Obtain More InformationWho Should Use this Book? Contents Solving Problems Appendix B Print Characteristics 107 About the 7193 Printer Options FeaturesModels Communication Interfaces Thermal Printhead Ordering Paper and Supplies Ordering Thermal PaperRecommended Suppliers Kanzaki Specialty Papers Other Qualified Suppliers Ordering the Power Supply and Cables Ordering the Printer Wall-Mount KitOrdering Cash Drawers Cleaning the Printer Removing the Packing Material What Is in the Box? Repacking the Printer Choosing a Location Setting Switches Owner’s Guide Attaching the Feet Connecting Cash Drawer Cables RS-232C Models Connecting Communication and Power Cables Parallel Models Turning On the Printer Loading and Changing Paper When to Change the Paper Removing the Paper Roll Putting In the Paper Roll Advancing Paper Testing the Printer 3cx39pi Mounting the Printer on a Wall Bracket Mounting the Power Supply on a Wall Holder Operator Panel Lights Solving Problems Correcting Problems Service-Related ProblemsOperator-Correctable Conditions Contacting a Service Representative No Power to Printer or Power Voltages IncorrectPrint is Light or Spotty Level 0 Diagnostics Diagnostics Eerom Level 1 Diagnostics Setting Data Error and Data Buffer options Setting Printhead Resistance Setting Default Lines per Inch Setting Partial Cut Distance Ignoring/Using the Carriage Return Enter the Data Scope Mode Running the Data Scope Mode 1BH Exit the Data Scope Mode Testing Receipt Printing Level 3 Diagnostics Level 2 Diagnostics Sending Commands Communication OverviewInterfaces Using DOS to Send Commands Using Basic to Send CommandsRS-232C Interface DTR/DSR Protocol XON/XOFF Protocol Connectors RS-232C Technical Specifications Cash Drawer Connectors Switch Settings OFF Parallel Protocol Parallel Interface Parallel Connectors Parallel Technical Specifications Parallel Printers Parallel Switch Settings Command List Commands Printer Function Commands Owner’s Guide Print Characteristics Commands Printer Status Commands Graphics Commands Bar Code Commands Real Time Commands Command Descriptions Horizontal TabLine Feed Carriage Return Clear PrinterFeed n Print Lines Feed n Dot Rows Add n Extra Dot RowsPrint Set Column Full Knife CutPartial Knife Cut Generate Tone Set Absolute Starting Position Set Character Right-Side Spacing Initialize Printer Set Line Spacing to 1/6 InchSet Line Spacing to n Minimum Units Select Printer Print and Feed n Minimum Units Set Horizontal Tab Positions Set Relative Starting Position Print and Feed n Lines Enable or Disable Panel SwitchAlign Character Positions Select Sensors to Stop Printing Read from Non-Volatile Memory Generate Pulse to Open Cash DrawerWrite to Non-Volatile Memory Select Double-Wide Characters Select Single-Wide CharactersRotate Characters Counter-Clockwise Select Pitch Column Width Set Print Mode Define User-Defined Character Set Select Character Set Select Character Code Table Copy Character Set from ROM to RAM Set or Cancel Upside-Down Characters Set or Cancel Rotated Characters Clockwise Summary of Rotated Printing Set Bit Image Mode N1 + 256 x n2 N1 + 256 x n2 Number of Bytes of Data Double-Density Graphics Single-Density Graphics Define Downloaded Bit Image Print Downloaded Bit Image Transmit Cash Drawer Status Request Alternate Status Transmit Printer Status First Implementation Alternate Implementation Rules for Using Real Time Commands Moving Data Through the Buffer Busy Line and Fault Conditions GS Sequence Real Time Status Transmission = Transmit Printer Status = Transmit RS-232C Busy Status = Transmit Receipt Paper Status Real Time Request to Printer DLE Sequence Real Time Printer Status Transmission Clear Printer Command Recognizing Data from the Printer Select Printing Position of HRI Characters Select Pitch of HRI CharactersSelect Height of Bar Code JAN8 EAN Print Bar Code Select Width of Bar Code Print Code 128 Bar Code Reliability Appendix a Specifications Environmental Conditions Power Requirements Printing Specifications Dimensions and Weight Print Zones Duty Cycle Restrictions Printing Solid Blocks Density of Receipt Print Lines Appendix B Print Characteristics Appendix B Print Characteristics Owner’s Guide 110 May May Index Index 112 Owner’s Guide Owner’s Guide 114 Owner’s Guide Owner’s Guide Axiohm IPB