Epson LQ-2500 The Serial Interface

The Serial Interface

The LQ-2500 standard serial interface is an RS-232C interface with the following characteristics:

Synchronization

Asynchronous

Data format 1 start bit

data word length: 8 bits odd, even or no parity 1 stop bit

Baud rate

300, 600, 1200,4800,9600, 19,200 bps

Signal level

mark (1) -3 V to -27 V space(O) +3 V to +27 V

Handshaking

Handshaking by DTR signal or X-on/X-off. The DTR signal changes to “mark”-meaning the printer is not ready to receive data-when the number of bytes free in the input buffer goes down to 256. The signal changes to ‘space”-meaning that the printer is now ready-when the number of bytes free in the input buffer rises to 528.

The arrangement of pins is shown in the figure below:

Figure	H-2.	-	-
Figure	H-2.
Senal	intetface

Interface Specifications

H - 3

Contents

Page Page FCC COMPLIANCE STATEMENT FOR AMERICAN USERS Copyright © 1986 by Seiko Epson Corporation Nagano, Japan 1-3 Installing the Ribbon Chapter Reference Appendix C Page Introduction built-in and There are four preset macros you can use, or you can create your own To make it easier to set up your new LQ-2500,this manual includes a Intro-2 Setting Up the Printer 1 Unpacking the Printer Caution Figure 2 Choosing a Place for the Printer 3 Installing the Ribbon WARNING 3.Move the print head carriage to about 25 on the ruler on the paper bail 5.Make sure the paper bail is against the platen 8.Turn the ribbon tightening knob again to make sure the ribbon moves freely 4 Turning On the Printer initialized 5Operating the Control Panel On line/Off line Print quality/font selection SelecType You can use the FORM FEED button to eject a single sheet of paper or advance The LINE FEED and FORM FEED buttons on the panel control paper while the current font at the same time The indicator lights In addition to the ON LINE light, the LQ-2500has three other lights POWER--Thislight indicates that the printer is turned on and receiving power PAPER OUT--This 7 Loading Paper Paper loading icons lever back feature, and when actually paper then let go of it. The display changes from [PAPER OUT] to [OFF LINE] [PAPER OUT] Pull the paper bail lever forward to the With the paper loaded, press the home 8 Running the Self Test Page 9 Connecting the Printer to Your Computer The parallel interface 10 A Final Checklist Page SelecType lets you: Choose among the LQ-2500’sfive built-in fonts Change the LQ’s default settings without DIP switches, and more load Using SelecType same rime The SelecType Main Menu always return to the main menu After activating SelecType, press *LOAD *CHANGE * LOAD MACRO Macro #2 Macro #l can i t a l i c , d o u b l e W i d t h , and e m p h a s i z e d From the SelecType main menu, press MENU until the display shows [*LOAD MACRO] Page *CHANGE MACRO Table 2-1.Printer settings and options current Current setting >1” SKIP stored •Changing only the current printer settings, or Changing There are two ways to change the current settings To charge the current settings, follow these steps From the SelecType main menu, press 2.Press SETTING to see the printer settings listed in Table 4When you see the option you want, leave it displayed SETTING immediately 7.Use the *Print Out Settings mode to confirm the new settings Note Use the *Print Out Settings mode to confirm the new macro and current settings *CHANGE DEFAULTS defaults terms Table 2-2.Default Settings and Options Setting serial Baud rate is the rate at which the printer receives data from the bits SelecType 2.Press SETTING to see the default settings listed in Table 4.When you see the option you want, leave it displayed save immediate/y 10.Use the *Print Out Settings mode to confirm the new default settings Page *PRINT OUT SETTINGS *PRINT OUT SETTINGS Selecl Type OPTION and Selec Type Choosing and Loading Paper Choosing Paper Without installing any accessories, you can use single-sheetpaper Carbon copies Loading Single Sheets Loading Continuous-feedPaper Page Open the covers on the sprocket units as shown in Figure Page Setting the top of form position is a simple three-stepprocess: 1.See that the printer is turned off 3.Turn the printer on Loading Labels You can use labels on a continuous-feedbacking, with a perforated The Paper Thickness Lever Page Using the LQ-2500with Application Programs Table 4 I. LQ-2.500Printer Selection Choosing the Correct Printer Computer-PrinterCommunication The most frequently used hexadecimal numbers lie in the range 0 to 1BH $lB &lB &HlB <(1B>H Setting Up Application Programs Word Processors Installation or setup driver initialization Printer commands embedding both Make sure you’ve selected the correct printer Spreadsheets Installation and column width The program 's printing A programming both lMake sure the SelecType settings are correct Setting Up Graphics Programs installation or setup character character Programming Languages Sending printer commands with BASIC This is a sample of italic Using the LQ-2500Print Features Emphasized Double-strike Italics Proportional 3.LQ Courier This is the Courier font Selecting fonts with the LQ button-You while the current font name is displayed Selecting fonts with on& Print Pitch and Character Width 1 0 c h a r a c t e r s all each s p a c i n g This condensed printing T h i s i s l o - p i t c h p r i n t i n g printer command sent from an application program or programming language can also print Emphasized produces darker characters. Double-strikeproduces bolder characters This is continuous underlining E=mc2 average (a1 + a2 + ........ + an) Using Character Tables and Sets two The Download option is for future expansion International characters Page Graphics and User-definedCharacters Graphics The Print Head Page Graphics Commands ESCape nl n2 Page Fgure Page Lines Page User-definedCharacters Page Page significant ESCape ‘&” 0 nl n2 d0 dl d2 data n2 n2 d1 x 140 DATA 1,0,0,2,0,0,4,0,0 160 DATA 4,0,0,2,0,0,1,0,0 Printing User-definedCharacters ESCape ‘%” n ESCape “:” 0 0 Page Page Appendix A your nl, m used: Esc s, Esc u, Esc x, Esc p, ESC w, ESC s, ESc -,ESC %, ESC t, and ESC w LPRINT CHR$(27);“W”;CHRS(l)-ASCIICode ASCII code: 112 n Hexadecimal: LPRINT CHR%(27);CHR$( 112);CHR$( 1) Some application programs can use control key codes for decimal Commands in Numerical Order ASCII Description Page BEL ESC Q . . A-18 ESCR Select an International Character Set Esc S0 Page ESCl E C p Turn Proportional Mode On/Off ESCr Epson ESC/P Commands Printer Operation Speed Escs Page ESC EM 1B The following values can be used for n: 4: Mode is turned ON 2:Loads sheet from bin 1:Loads sheet from bin Esc Data Control CAN Vertical Motion Form feeding ESCN Page n/180 n/60 Hexadecimal: OB ASCII code: ESC B nl n2 ASCII code: ESC B Decimal: 27 66 nl n2 Hexadecimal: IB 42 nl n2 ASCII code: ESC b c nl n2 Decimal: 27 98 c nl n2 Hexadecimal: 1B 62 c nl n2 Horizontal Motion ESC Q ESC $ (n2 n2 n2) ASCII code: HT Decimal:9 ASCII code: ESC D nl n2 Decimal: 27 68 nl n2 Hexadecimal: 1B 44 nl n2 Overall Printing Style ESC 0:Selects the draft mode 1:Selects the Letter Quality (LQ) mode ESC k Page Print Size and Character Width Page ESC so Print Enhancement Page Page Word Processing ESC a n ASCII code: ESC SP n Decimal: 27 32 n Hexadecimal: 1B 20 n MODE UNITS Page ESC& d2 ESC: ESC% Graphics Note: See Chapter 6 for sample graphics programs Note: See See Table A-1under ESC’ for graphics modes ESCK ESC L ESC Y Select High-speed Double-densityGraphics Mode ASCII code: ESC Y nl Esc Z 1B 5A Page Appendix B ASCII Conversion Chart and Character Tables ASCII Conversion Chart Decimal Hexadecimal Character Decimal Hexadecimal Character Japan How to Use the Charts Draft Converting hexadecimal numbers to decimal numbers Converting hexadecimal Hex-tuilecimalConversion Chart Epson Italics Character Set-Draft Epson Italics Character Set-LetterQuality 0 @ P ' p B R b c # 3 C S c s Epson Graphics Character Set-Draft (Control Codes Disabled) Epson Graphics Character Set-LetterQuality A B c D E F Character Set Proportional Width Tables B-9 Page Page Appendix C Typestyle Summary when W e ' v e s e e n y o u r e x c e l l e n t ad f o r Typestyle Summary !"#$%a ' ( )*+ , - ./0123456789:;<=>?@ABCDEFGHIJK LMNOPQRSTUVWXYZ[\]--‘ abcdefghijklmnopqrstuv Epson Draft !"#$~%&'()*+,-./0123456789:<=>??@ABCDEFGHIJK miniature Selecting Typestyles with Master Select The LQ has a special ESCape code called Master Select that allows 10 pitch Double-strike Double-width ASCII: decimal: Problem Solving and Maintenance General Troubleshooting Problem Recommendation LINE] Page Maintenance Troubleshooting Graphics Problems Troubleshooting for Serial Interface Communications Hex Dump Mode Enter this mode by turning on the printer while holding down the FORM FEED and LINE FEED Page Solutions for IBM and Compatibles IBM PC BASIC Solutions Maintaining Your Printer The print head Transporting the Printer •Remove the ribbon •Insert a piece of paper to cover the paper-outsensor •Move the print head to the left and replace the print head protector Appendix E Initialization and Default Settings Page Appendix F Choosing and Setting Up Optional Interfaces Compatible Interfaces Interfaces Choosing an Interface This section describes the interfaces IEEE-488and Apple interfaces Buffered interfaces Serial interfaces Page Installing an Interface Before installing an interface, you must remove the printer’s cover 2.Remove the dust cover and paper guide 3.Remove the automatic sheet feeder if one is installed 5.Remove the ribbon and move the print head to the middle of the printer Page Inserting the Interface Board Serial Interface Settings Note] Page Appendix G Technical Specifications Printing Printing method Impact dot matrix Paper Mechanical Electrical Environment Amendix H Interface Specifications The Parallel Interface Table H-1.Pins and signals H-2 The Serial Interface Error handling All errors are ignored Connector 6-pinDIN connector In Table H-2,the direction of signals is given relative to the printer Glossary See Condensed configure See Automatic sheet feeder GL-2 A graphic design formed by patterns of dots CL-3 Escape (ESC) See Data dump defaults This sentence is italicized Three number systems are commonly used with printers: The part of the printer that holds the paper against the platen at a time, and a serial interface transmits data one time GL-6 RAM GL-8 bidirectional printing Index and definitions of terms are not Edge tab Elite. See 12 pitch Emphasized printing ESUP module ESCape codes, 4-2 Numbering systems OFF LINE, 1-7 ON LUE, 1-7-8light, 1-7 Optional interfaces, F-1 Panel, control, 1-6