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Lexmark 248X Using an IBM AT Personal Computer RS-232C, Serial Communication Parameters RS-232C

Models: 249X 248X

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Using an IBM AT Personal Computer (RS-232C)

If you are using an IBM AT or compatible computer, use a 9-pin to 25-pin EIA RS-232C cable.

We recommend one of the following for a 9-pin to 25-pin cable:

•IBM P/N 6450242 (254 mm or 10 in.)

•IBM P/N 6450217 (3 m or 10 ft.)

The following illustration shows the pin assignments for the 9-pin to 25-pin RS-232C serial cable.

IBM 9-Pin to 25-Pin Adapters 6450242 (254 mm or 10 in.) 6450217 (30.4 m or 10 ft.)

Lexmark Null Modem Serial Cable 1038693 (15.24 m or 50 ft.)

		Shield
DCD	1	1
RXD	2	2	TXD
TXD	3	3	RXD
DTR	4	4	RTS
GND	5	5	CTS
DSR	6	6	DSR
RTS	7	7	GND
CTS	8	8	DCD
		20	DTR
RI	9	22
	9 (F)	25 (M)

Shield		F. GND
	1
2	2	TXD
3	3	RXD
4	4	RTS
5	5	CTS
6	6	DSR
7	7	L. GND
8	20	DTR
20	20	DTR
25 (F)	25 (M)

Serial Communication Parameters (RS-232C)

The acceptable values for serial communications parameters follow.

Voltage Level Range

The maximum voltage level range for control lines or data lines is from

± 25 positive V dc to ± 25 negative V dc.

Section 6: Using the Printer Interface	99

Image 99

Lexmark 248X, 249X Using an IBM AT Personal Computer RS-232C, Serial Communication Parameters RS-232C, Voltage Level Range

Contents

Forms Printer 248x/249x United States Government Restricted Rights Contents Page Epson Mode Printer Commands Barcodes Glossary Index Viii Introduction Options Part Number 2480 2481 2490 2491 Physical CharacteristicsWidth Height Depth Weight Available Options248x Mode 2480/2481 2490/2491Print Speeds Printhead DescriptionEnvironmental Conditions Power RequirementsFollowing are noise emission values for your printer Alternating Current Line Voltage PowerPower Cord Noise Emission ValuePaper Specifications 2480/2490 Narrow Carriage ModelsLength 2481/2491 Wide Carriage Models Manual Feed cut sheets Tractor Feeder continuous formsPrinter Test Ribbon SpecificationsDiagnostics Power-On DiagnosticsProgramming Examples Wend Introduction Use the following format SIC Command FormatInitial Values Description Printer Dec Hex Parm Description Selection Dec HexBit Off Parm Description Selection Dec Hex Parm Description Selection Dec Hex Parm Description Selection Dec Hex Control Codes Code Symbol Description Value Name Dec HexEscape Sequences Printer Command ParametersCommand Structure Select Code Page name of command Example of IBM Emulation Mode Printer CommandInformation Printer Command Quick Reference IBM Emulation ModeFunction Command Dec Hex See For moreM3 m4 1B 5B 67 Ln Hn modeMode data Data 58 n1,n2Usage Notes Selecting a Character SetSelect Code Select Character SetContinuously Print Characters from a Code Print From CodeLocated in the code page tables beginning on Download a Character SetPrint One Character Usage NoteStart low/start high Select Global FontSelect Global Font GothicPrestige Presentor OratorScript Code Decimal Hex Global Font and Size ParametersGlobal Font and Code Pitch Dec Hs, Ls Hex Hs, LsSelect Print Mode This command sets the pitch at 12 cpiSelect 12 cpi Dec Hex Print Mode 248x249x Select Print Type Style Height Line Space Dec Hex Dec HexTo end bold print Use this command for bold print To begin bold printEmphasized Bold Print Double-Strike PrintSet Print Direction Superscript or SubscriptScore Select Cancels double-wide printing modeSets double-wide printing mode Continuous Double-wide PrintingContinuous Overscore Continuous UnderlineDecimal Hex Set Print QualityBit Number Binary Value Print Wires Graphics Print ModesNormal Density Bit Image Graphics Mode and Horizontal Density 249x Only Mode DecHorizontal Density Wires Dual-Density Bit Image Graphics Half Speed Mode Dec Hex Horizontal Density WiresHigh-Density Bit Image Graphics Dual-Density Bit Image Graphics Normal SpeedSet Default Tabulation Stops Horizontal MovementSet Horizontal Tabulation Stops This command sets the left and right margins Set Horizontal MarginsMove Current Print Position Move Paper Vertically Line ControlAutomatic Line Feed LF Reverse Line FeedSets as many as 64 tabulation stops by line number Vertical TabulationSet Vertical Units Set Vertical Tabulation StopsActivate Line Spacing for Text Line SpacingSet Line Spacing to 1/8 Inch Set Line Spacing to 7/72 InchSet Line Spacing for Graphics Porportional Space ModeThis command turns porportional space mode on and off Set Line Spacing for TextSet Page Length in Lines Set Top of Form and Page LengthSet Top of Form Set Page Length in InchesCancel Skip Perforation This command cancels Set Skip Perforation ESC NSet Skip Perforation Deselect Printer Setup Barcode ParameterThis command sets the barcode parameters to the printer Printer ControlBarcode Type Unit Module Width Dots Dec Hex WireSetup Barcode Data Dec Name Dec Hex Description Font SelectionCharacter Set Select an InternationalSelect Character Style 248x Select Near-LetterQuality Font 249x Select Letter-Quality FontTable/Code Assign Character TablesParameter range FunctionText Print Mode Off Dec Hex Print Style Select JustificationBegin or End Double-high Printing Delete TextDual Density Bit Image Graphics Pin Graphics Mode 248x onlyChange Graphics Mode Command Normal Density Bit Image GraphicsDots per Inch Density Dpi Equivalent Command Set Graphics ModeSet Absolute Print Position BackspaceHorizontal Tab Set Horizontal Tab StopsVertical Movement Format Other Commands Define Download Characers Setup Barcode ParameterSetup Barcode Data Select Condensed ModeEpson Emulation Mode Printer Commands Set Character SetSelect Standard Character Set Select Block Graphics CharacterHexadecimal Print from CodeCode Page Set DecimalCharacter Size and Spacing Value Variable/Feature Character StyleFactor 112 Custom Characters Stored graphics data in one dot column buffer Dots per inch/DensitySpeed/Word Size Pitch 2480 2481 Backspace Carriage ReturnExecute Horizontal Tab Set Horizontal Tabs by CharactersSet Horizontal Tabs by Dot Columns Pitch Shift IncrementIndent from Left Margin Begin Uni-directional Printing Set Multiple Print PositionsMove to the Left Move to the RightSelect Skip Over Perforation Cancel Skip Over PerforationSet Page Length in Inches Set Page Length in LinesCancel Print Suppress Mode Cancels Half-speed PrintingCancel Paper-out Sensor Select Print Suppress ModeEject Parallel Interface Voltage Levels Parallel InterfaceComputer to Printer Communication Pin Connections Computer1329605 10 ft 1427498 20 ft Printer Pin Line Description Parallel Pin AssignmentsInit TimingSerial Interface Option How to Connect the RS-232C Serial InterfaceUniversal Serial Bus Interface Serial InterfacePin Signal Description Serial Cable Pin Assignments RS-232CFollowing illustration shows the RS-232C serial cable Serial Interface Cable RS-232C Using an IBM AT Personal Computer RS-232C Serial Communication Parameters RS-232CVoltage Level Range Start and Stop Bits 100Serial Data Frame Considerations RS-232C Data TransmissionErrors 101Data Flow Control XON/XOFF Protocol Timing 102OS/2 2.0 Serial Computer Configuration Recommendations RS-232C103 OS/2 1.2104 105 How Dots Are Added in NLQ Mode248x Printers Designing Draft and NLQ CharactersVertical Lines 106Intersections of Vertical and Horizontal Lines 107Diagonal Intersecting Horizontal Line 108Designing Fast Draft Characters Designing NLQ II Characters Downloading Characters109 Part One Calculating Count 1, Count 110Initializing the Download Area Downloading a Draft/NLQ Character Set111 Part Two Specifying the Download DataBit Bit Values Functions Printable 112113 Designing and Downloading the Draft/NLQ Copyright Symbol114 Downloading an NLQ II Character Set 115116 117 Bit FunctionsPrintable Data 118 119 Downloading a New Font 249x PrintersDesigning and Downloading Characters 120121 Font Descriptor ByteDesign Considerations Download Sequence 122123 Managing the Download Area 124Lookup Table 125 Designing Monospaced Fast Draft CharactersMSB LSB 126Use the following command to initialize the download area 127Creating the Character Data For more information about the Font Descriptor Byte, see 128Downloading the Character Data Downloading the Font Descriptor ByteSend the following lookup table information to the printer 129Creating the Lookup Table Data Downloading the Lookup Table DataDesigning Monospaced Draft Characters 130Printing the Character LSB MSB 131Initializing the Download Data 132133 134 135 Designing Proportionally Spaced CharactersLSB MSB 136Compressing the Character 137138 Send the following lookup table example to the printer 139140 141 Designing Enhanced Letter Quality Characters142 1FFFF0 143144 145 146 Barcode Function BarcodesBarcode Setup Command 248x 249x 149Is a space module Is a bar module Barcode Type ValueValue 248x space 249x space Module adjustment Is the space width adjustment factorMinimum Minimum v1 Printer Model Value Values 151Data Transfer Command 153 Barcode SymbologiesCharacter Hex 13, x0D12, x0C N2 value Data character set155 Valid EAN-13 commandN2 value Invalid EAN-13 command157 Valid EAN-8 commandBarcodes To 255, x01 to xFF 159X53 161 Valid Code 39 commandLowercase ’a’ is not a valid data character for Code Invalid Code 39 commandInterleaved 2of5 163Valid Interleaved 2of5 command Invalid Interleaved 2of5 command 16511, x0B Valid UPC-A command 167 Character N1 value b0=1169 Valid Postnet command’-’ dash is an invalid character for Postnet PostnetTo 255, x02 to xFF 171Function Hex Data character sets173 Data character set aHex Character Code Data character set B Data character set C 175Valid Code 128 command 177 Invalid Code 128 commandValid Code 128 command using multiple character sets 179 X0005 181 Example 183 Space width adjustment = default 185 Barcodes Code Pages Code 189 Code Page 437GCode 191 Code 193 Code Page 853TCode 195 Code 197 Code 199 Code 201 Code 203 Printing a Code Code CommandOutput from the previous example is shown below 205Set Font Global, ESC 248x Font Global IDs FGIDs Decimal, Hex and Byte Decimal 207Gothic 249x Font Global IDs FGIDs Decimal, Hex and Byte Decimal 209Pitch 211 Decimal Hex Code Print Quality Decimal Hex 213Select Fast Draft Interaction of Set Font Global and Set Print Quality215 Character Sets 1Character Set 217 Code Pages Glossary Glossary Data flow control RS-232C Data frames serial Data packets NumericsSee serial adapter Index Index Reader’s Comment Form Business Reply Mail