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Epson 8900 Series Data-Transfer Operations, Communication interfaces simplified block diagrams

Models: 8900 Series

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The following figure shows simplified block diagrams of two types of data-communication systems and their associated communication interfaces.

host

RS-232-C

serial

interface

long-distance system

modem

modem

telephone

lines

RS-232-C

serial

interface

printer

host

local system

parallel

interface

local

printer

communication interfaces (simplified block diagrams)

The long-distance system typically uses telephone lines to transfer data from the host to the printer. Because this system is limited to bit-serial data-transfer operations, it is necessary that the host-to-modem interface at one end and the modem-to-printer interface at the other end be serial interfaces. The local system uses a parallel interface to connect a local printer directly to the host.

Data-Transfer Operations

The data-transfer rate can vary from one system to another, depending on such factors as the host data-transfer rate, the type of communication interface used, and the distance over which the data is transferred. To compensate for these transfer-rate variations, the printer provides a receive buffer to temporarily store received data prior to printing it.

Communication Interfaces 10-4

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Epson 8900 Series manual Data-Transfer Operations, Communication interfaces simplified block diagrams

Contents

Model 8900 Series Printer Technical Reference Manual Contents Epson FX Printer Emulation Optional Emulation CommandsTl Model 855 Printer DP Emulation IBM Proprinter XL EmulationSerial Number Purchase Date Firmware Revision Copyright 2001 by Lake Erie SystemsContents Symbols Used in This ManualIBM Proprinter XL Emulation describes Epson FX Printer Emulation describes the commandsTexas Instruments Model 855 Printer WP Emulation Texas Instruments Model 855 Printer DP EmulationOther Manuals About the Printer SuppliesBuffalo Road Erie PA General Information Paper-Handling System IntroductionPrinter Features Print Quality Low-resolution Medium-resolution High-resolution Typical dot-matrix charactersEffect of increasing dot density Raster Graphics Printer Setup Graphics Printing Mode Display Operator control panelSetup/test menu Model 8900 Series Emulation Modes Line Feed and Carriage Return Upon Receipt of LF Execute CommandsEmulation mode submenu TI 880 EmulationShift Out Equals Expanded Print Line Feed and Carriage Return Upon Receipt of CRCarriage Return Upon Receipt of LF, VT, or DC2 GraphicsAutomatic Line Feed Processing ModeTI 855 Emulation IBM Proprinter XL and Epson FX EmulationsHexadecimal Dump Mode Automatic Carriage ReturnSlashed Zeros Interface Parameters PortBuffer Size Flow Control Baud RateData Bits ParityRobust XON/XOFF XON/XOFF transmit-on/transmit-offPIN ConnectionETX/ACK end-of-text/acknowledge DTR PinCharacter Set Miscellaneous Setup ParametersRibbon Adjust Axis ControlRibbon Type Idle Delay Power-Up OnlinePaper Pull-Down Warning Limiting Control Panel Operation Graphics Printing ModeLCD Language Paper Out Equals BusyLimiting control panel operation menu Test FeaturesCharacter Sets and Global Commands Character Code Table Character Sets US Ascii Character Set US Ascii Character SetVariations Between US Ascii and International Ascii International Ascii Character SetsIBM PC1 Character Set, Left Half IBM PC1 Character SetIBM PC1 Character Set, Right Half IBM PC2 Character Set, Left Half IBM PC2 Character SetIBM PC2 Character Set, Right Half Nordic PC Character Set, Left Half Nordic PC Character SetNordic PC Character Set, Right Half ISO 8859/1 Multinational Character Set, Left Half ISO 8859/1 Multinational Character SetISO 8859/1 Multinational Character Set, Right Half IBM Multinational Character Set, Left Half IBM Multinational Character SetIBM Multinational Character Set, Right Half Control Characters Information separators C0 Control CharactersHexadecimal Char Code Definition Communication controls Format effectorsPrinter Commands Command Command Name Global Command DescriptionsGlobal Command Set Model 8900 Series Printers Global CommandsSet Barcode Parameters Barcode OperationsOversize Characters Feature Print Barcode TextSet Oversize Character Scale Factor Print Oversize Character Color PrintingSelecting a Form Format Selecting an Automatic Sheet Feeder BinDefining Raster Graphics Selecting a Font Selecting a Font’s HMIFont ID No Value of n Selecting Characters Per Inch cpiSelecting Print Quality Hex Value PitchSelecting an International Character Set ModeCharacter Set Hex Selecting an Emulator Adjusting the Print head Z-Axis Position Writing to the Printer DisplayPaper-Handling Operations Character Sets and Global Commands Texas Instruments Model 880 Printer Emulation Tab Right to Column N Cancel Double Line Spacing Introduction TI 880 Response Format Selection Tl 880 Answer Message FunctionForm Format Selection Model 880 Printer Emulation CommandsModel 880 Emulation Commands Command Command Name Printer OperationHorizontal Motion Command Command Name Margin ControlLine Spacing Model 880 Emulation CommandsCommand Command Name Vertical Motion Character PitchFont Selection Raster GraphicsVariables N and n Model 880 Command DescriptionsSound Bell Printer Operation CommandsTransmit Configuration Report Code ConfigurationCode Description Model 880 Configuration CodesCode Error Miscellaneous Configuration CodesTransmit Status Report Select Unidirectional Printing Form Format Selection CommandsModel 880 Error Codes Cancel Unidirectional PrintingLoad Default Form Parameters TI Model 880 Printer Emulation Set Top and Bottom Margins at Lines N1 and N2 Margin Control CommandsSet Top Margin at Line N Set Bottom Margin at Line NSet Left and Right Margins at Columns N1 and N2 Restore Default Line WidthSet Left Margin at Column N Set Right Margin at Column NMove to Column n Horizontal Motion CommandsBackspace Tab HorizontallyClear All Horizontal Tab Stops Tab Right to Column NTab Right N Columns Set Horizontal Tab StopsLine Feed Vertical Motion CommandsSet Horizontal Tab Stop at Current Position Clear Horizontal Tab Stop at Current PositionTab Vertically N Lines Tab VerticallyMove to Line n Tab Vertically to Line NClear All Vertical Tab Stops Character Pitch CommandsSet Vertical Tab Stops Set Vertical Tab Stop at Current PositionLine Spacing Commands Set Line Spacing to n/216 Inch Set Line Spacing to 8 lpiSet Line Spacing to n/72 Inch Set Line Spacing to N/144 InchPrint Enhancement Commands Set Up Graphics Parameters Raster Graphics CommandsSelect 120 dpi Graphics Select 60 dpi GraphicsDesignate G0 Font by ROM Identifier N Font Selection CommandsSelect Font N Font InvocationSelect Designated Character From G3 Font Designate G2 Font by ROM Identifier NDesignate G3 Font by ROM Identifier N Select Designated Character From G2 FontInvoke G1 Font as GR Invoke G2 Font as GRInvoke G3 Font as GR Texas Instruments Model 855 Printer WP Emulation Tab Vertically Absolute Page Introduction Motion Indexes Model 855 WP Commands Model 855 WP CommandsForm Format and Font Selection Model 855 WP Commands Command Name Horizontal Motion ESC SP Suspend Printing Model 855 WP Command DescriptionsSelect DP Mode Select WP ModeSet Most Significant Bit Cancel Reverse PrintingReset Most Significant Bit Select Reverse PrintingSet Form Length to n1 n2 Lines Form Format and Font Selection CommandsSelect Right Margin Justification Set Left Margin at Current Position Cancel Right Margin JustificationSet Top Margin at Current Position Set Bottom Margin at Current PositionHorizontal Motion Commands Tab Horizontally Absolute Move Back 1/120 inchTab Vertically Absolute Move Down One-Half Line Character Pitch CommandsMove Up One Line Move Up One-Half LinePrint Special Character Character Set CommandsSet Vertical Motion Index to n-1/48 Inch Set Vertical Motion Index to n-1/144 InchSelect Compressed Print Cancel Expanded PrintCancel Compressed Print Select Expanded PrintSelect Text-Underline Print Cancel Text-Underline PrintCancel Boldface Print Cancel Shadow PrintSelect 144 dpi Graphics Select 72 dpi GraphicsTexas Instruments Model 855 Printer DP Emulation Set Character Pitch to 10 cpi Set Character Pitch to 12 cpi Introduction Command Name Printer Operation Model 855 DP CommandsModel 855 DP Commands Command Name Vertical Motion Color Emulation Model 855 DP Command Descriptions Escape sequence ESC b Hexadecimal 1B Control character. BS Hexadecimal Tab Horizontally Move Print Position to Left Margin Escape sequence ESC Hexadecimal 1B 5E Character Pitch Commands Set Line Spacing to 7/72 Inch DC2 Select Epson-JX Compatible Color Mode Select TI 857 Compatible Color ModeColor Emulation Raster Graphics Commands IBM Proprinter XL Emulation Disable Automatic Line Feed Raster Graphics Commands Introduction IBM Proprinter XL Emulation Commands IBM Proprinter XL CommandsForm Format and Margin Control Character Set Character Pitch and Line SpacingIBM Proprinter XL Command Descriptions IBM Proprinter XL Commands concludedCommand Name Print Enhancement Cancel Line Select PrinterDeselect Printer Form Format and Margin Control Commands Set Form Length to n InchesSet Top of Form Position Select Automatic Perforation Skip Cancel Automatic Perforation SkipControl character. CR Hexadecimal 0D Restore Default Tab Stops Enable Automatic Line Feed Perform n/216 Inch Line FeedPerform Reverse Line Feed Clear Vertical Tab Stops Character Pitch and Line Spacing CommandsDisable Automatic Line Feed Reverse Line FeedSelect Programmable Line Spacing Print Multiple Specified Characters Select PC1 Character SetSelect PC2 Character Set Print Single Specified CharacterDC4 Select Text-Overscore Print Cancel Text-Overscore PrintSelect Subscript Print Cancel Superscript PrintCancel Subscript Print Select Superscript PrintEnable/Disable Double-High Double-Wide Print M2 data byte, bit 0 is least significant M1 data byte, bit 0 is least significantSelect High-Speed 120 dpi Graphics Select 240 dpi Graphics ModeEpson FX Printer Emulation Mode Perform n/216 Inch Line Feed Select Graphics Mode m Introduction ESC EM Epson FX Printer Emulation Commands Epson FX Emulation CommandsForm Format Command Command Name Horizontal Motion Command Command Name Character Set Epson FX Emulation Command Descriptions Delete Character Initialize Printer Set Most Significant Bit to ZeroSet Most Significant Bit to One Select Unidirectional Printing for One Line Only Cancel Most Significant Bit ControlForm Format Commands Select Letter-Quality Courier Font Select Letter-Quality Gothic FontSelect Left Margin Justification Select Full JustificationSelect Text Centering Set Left Margin at Column n Horizontal Motion Commands Set Relative Print Position Set Absolute Print PositionN1...n32 Form Feed Select Vertical Tab Channel Set VTC Tab StopsClear All VTC Tab Stops Set Intercharacter Space Line Spacing Commands Select Extended Graphics Character Set Select Italic Character SetEnable Character Positions 128-159 as Printable Characters Disable Character Positions 128-159 as Printable CharactersSelect International Character Set Select Expanded Print for One Line Select Expanded Print Until Canceled by ESC W NUL Cancel Double-High PrintSelect Double-High Print Cancel Compressed Print Cancel Boldface Print Cancel Italic Print Select Master Print ModeSelect Italic Print Graphics Commands Select 9-Pin 60 dpi Graphics Select 9-Pin 120 dpi GraphicsSelect 240 dpi Graphics Reassign Graphics Mode Select Graphics Mode mOptional DEC LA 120 Emulation DEC LA120 Commands DEC LA120 Emulation CommandsHorizontal Pitch Sequences Horizontal Tab SequencesVertical Tab Sequences Vertical Pitch SequencesCharacter Set Selection Sequences DEC LA120 Emulation New Line ModeDEC LA120 Commands Not Recognized Answerback Memory FunctionAnswerback Memory Message Load Auto WrapCommunication Interfaces 10-18 Introduction Communication interfaces simplified block diagrams Data-Transfer OperationsHost Local system Parallel Interface Printer Host Parallel Communication Interface Parallel Interface Signals Name Pin Return Source Parallel Interface Signal DescriptionsData Signals Data Strobe SignalAcknowledge Signal Busy Signal Fault SignalInitialize Signal Parallel Interface Communication Protocol Parallel data timing sequence Timing Requirements Parallel Interface Timing RequirementsInitialize Sequence Error Conditions Serial Communication InterfaceCommunication Interfaces Pin Source Serial Interface ConnectorSerial Interface Signals Name Interface ConnectionInterface Signal Descriptions Data Terminal Ready Signal Clear to Send SignalData Set Ready Signal Data Carrier Detect SignalSerial Data Format Interface Data Transmission RateTransfer direction Start Bit Transfer direction Start Bit LsbSerial data structures Stop Bit Parity Flow-Control Busy-Handling Protocols Serial Interface Busy-Handling ProtocolsDirect-Connect Busy-Handling Protocols Optional Communication InterfacesCurrent Loop Communication Interface RS-422 Communication InterfaceIntroduction Axis Adjustment Escape SequenceIsolated labels Uneven edges Considerations for Z-Axis AdjustmentsPaper motion is reversed Text Label Using the Z-Axis Escape SequenceEscape Sequence Z-Axis Printhead Position Right margin of 1-inch is set at columnESC DLE E TI855 EXT ESC CR P changes to TI855 WP Emulation CommandsIndex Communication interface Nvram Printing Unidirectional printing 7-8 Width, line Adjust