EPSON ESC/I Scanner ® GT-1000 GT-4000 GT-6000 GT-6500 GT-8000 GT-8500 GT-9000 GT-5000 GT-300 TM ES-300C ES-600C ES-800C ES-1000C ES-1200C Action Scanner II ES-300GS Reference Manual
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson Corporation. No patent liability is assumed with respect to the use of the information contained herein. While every precaution has been taken in the preparation of this book, Seiko Epson Corporation assumes no responsibility for errors or omissions.
Preface This manual was designed to be a comprehensive guide to programming EPSON scanners using the advanced ESC/I control language. It was written with both the professional and advanced hobbyist programmer in mind. Before you begin using this manual, you should thoroughly review the operating instructions in your scanner’s user’s guide.
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Contents Introduction Manual Construction . . . . . . . . . . Overview . . . . . . . . . . . . . . Command Usage . . . . . . . . . . Command Reference . . . . . . . . Appendix . . . . . . . . . . . . . . Using This Manual . . . . . . . . . . . To understand EPSON scanners . . To write a scanner control program Chapter 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Scanner Features . . . . . . . . . . . . . . Scanning multiple shade documents for output on devices capable of expressing multiple shades. . . . . . . . . . . . . . . Scanning multiple shade documents for bi-level output devices capable of black and white only . . . . . . . . . . . . . . . Scanning documents without multiple shades . . . . . . . . . . . . . . . . . . . Scanning documents to obtain unprocessed data . . . . . . . . . . . . . . . . . . . . Chapter 2 . . . . . . . . . . . 1-23 . . . .
Auxiliary Commands . . . . . . . . . . . . . . . 1. Initialize the scanner (ESC @) . . . . . . 2. Set the scanning mode (ESC g) . . . . . . 3. Set the line counter (ESC d) . . . . . . . 4. Control option (ESC e) . . . . . . . . . . 5. Eject (FF) . . . . . . . . . . . . . . . . . Control Codes . . . . . . . . . . . . . . . . . . . 1. Header (STX) . . . . . . . . . . . . . . . 2. Abort scanning (CAN) . . . . . . . . . . 3. Normal response (ACK) . . . . . . . . . 4. Negative response (NAK) . . . . . . . . .
Chapter 3 Command Reference Summary of the Scanner Commands Format of the Command Reference Execution Commands . . . . . . . Data Form Definition Commands . Image Definition Commands . . . . Image Processing Commands . . . Auxiliary Commands . . . . . . . . Control Codes . . . . . . . . . . . . Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B Scanner Model Technical Data GT-1000 Technical Data . . . . . . . Physical Characteristics . . . . . Error Indications . . . . . . . . . Software Functions and Settings Software Defaults . . . . . . . . DIP Switch Setting . . . . . . . . The Identity Data-Block . . . . . The Condition Data-Block . . . . GT-4000 Technical Data . . . . . . . Physical Characteristics . . . . . Error Indications . . . . . . . . . Software Functions and Settings Software Defaults . . . . . . . . DIP Switch Setting .
GT-8000 (ES-800C) Technical Data . . . . . Physical Characteristics . . . . . . . . . Error Indications . . . . . . . . . . . . Software Functions and Settings . . . . Software Defaults . . . . . . . . . . . . The Identity Data-Block . . . . . . . . The Condition Data-Block . . . . . . . GT-8500 (ES-1000C) Technical Data . . . . Physical Characteristics . . . . . . . . . Error Indications . . . . . . . . . . . . Software Functions and Settings . . . . Software Defaults . . . . . . . . . . . .
Introduction Introduction 1
Manual Construction This manual consists of the following sections: ❏ ❏ ❏ ❏ Overview Command Usage Command Reference Appendix The contents of each of these sections is described below: Overview Presents an overview of scanner functions, EPSON scanner features, control codes, and programming concepts. This information is helpful in quickly understanding scanner operating concepts. Command Usage Provides recommended ESC/I command usage and program construction for optimum use of EPSON scanner features.
Using This Manual To get the most out of this manual, you should follow the steps below: To understand EPSON scanners Read through the overview once, and then read the Command Usage section in depth. To write a scanner control program Read through the overview once, then read the Command Usage section. From there, move to the Command Reference section, followed by the Appendix. Always refer to the Appendix to ensure that the interface and data types correspond to your target scanner models.
4 Introduction
Chapter 1 Overview 1 This chapter provides a brief description of scanner operations and concepts. The special features of EPSON brand scanners are also outlined in this chapter.
What Is a Scanner A scanner is a device that performs the following functions: ❏ Reflects light off your documents ❏ Separates the light by color and intensity ❏ Converts that reflected light to digital data ❏ Sends the digital data to your computer for further processing Basic scanning principles A scanner normally includes two components: a light source that illuminates the document and a sensor that detects the light reflected off the document.
Main scan The horizontal scanning direction Sub scan The vertical scanning direction By combining the main scan and sub scan data, an entire page can be converted into organized digital data.
Reading color By illuminating the document with three lights, red (R), green (G), and blue (B), the scanner can analyze and separate a document’s three color components. The computer can then overlay this color-separated data to produce full-color images. Reading monochrome Even though you have a color scanner, you can still read your documents as monochrome. Color scanners can read documents as monochrome in two ways: 1-4 ❏ Treat all the data on the page as the same color.
EPSON Scanner Features EPSON scanners feature the following special attributes. ❏ A unified control code structure All scanner features are controlled by EPSON’s ESC/I scanner control codes, so the commands for each feature are the same for all scanner models. All models are downwardly compatible, so programs written for lower level scanners will work identically on upper level scanners.
❏ Optional automatic document feeder An automatic document feeder can be mounted on the GT-8000 (ES-800C), GT-6500 (ES-600C), GT-8500 (ES-1000C), or GT-9000 (ES-1200C) scanner models, allowing you to automatically load and scan multiple documents. This is particularly useful when using OCR (Optical Character Recognition) software to input text from long documents, or when creating an image data base.
Control Code Construction Function level The EPSON image scanner control language currently has the following function levels: B1 to B5 and A5. The relationship of each level is shown in the following diagram. Each level contains the commands and features of all lower levels. For example, if you are using a B4-level scanner, all programs made for B1 through B3 levels should run with no problem. All scanners feature the control codes from lower level machines.
Computers and Handshaking Scanners are connected to their host computers by some kind of interface. Since a scanner sends data to the computer, the interface must carry data not only from the computer to the scanner, but also from the scanner to the computer. For this reason, the interface must be capable of bi-directional communication. A method of interaction between the computer and scanners is necessary to prevent the computer from sending data at the same time the scanner is sending data.
Image Data The manner in which an image is converted into data and the way the data is sent to the computer is predetermined. The following sections describe this process. Image data format The smallest element of image data is called a pixel (short for picture element). A pixel is an individual dot; combining these dots, or pixels, forms an image. If you represent each pixel by one bit of data, you can determine whether that pixel is light or dark (1 or 0).
As you increase the amount of data, you dramatically increase the number of minute differences in color you can represent.
Line data transfer The scanner reads one horizontal line of data (main scan) and sends it to the computer. After the computer confirms it has received the data, the scanner sends the next line of data. The scanner repeats theses steps until data for the entire image is sent to the computer. This method is called line data transfer.
Block data transfer Line data transfer sends the data to the computer line by line. However, block data transfer sends multiple lines of data to the computer all at once. You can use commands to specify the number of lines sent at one time; in this way you can select the most efficient block size to send your data.
Functions EPSON scanners feature a number of various functions. A brief overview of these functions is provided below. For more detailed explanations, see the following chapter on using these functions, as well as the command reference section. Image definition Brightness This function allows you to set the brightness at which images are scanned. The following illustration shows the difference this setting can make in the final scanned image.
Gamma correction Gamma correction is a function that adjusts the light intensity so it matches the output device. Although an image may display clearly on your CRT display, your printer may not produce it the same way. Since image reproduction depends on the output device (CRT, printer, etc.), gamma correction adjusts the light intensity so the image is faithfully reproduced on the output device you are using. The term gamma refers to the ratio between the input and output light intensity.
Halftoning Halftoning adjusts the shade and color of each pixel according to the shade and color of the surrounding pixels. Setting halftoning to large results in a sharper contrast between dots. Setting halftoning to small results in reduced contrast.
Data form definition Data format The data format function determines how many bits are used to represent one pixel. Increasing the bits increases the number of shades and intensity that can be expressed. However, the data required to represent an image is also increased. For example, to scan an A4 size image using 8 bits per pixel at 300 dots per inch (dpi) in color would require 26.4 MB of data.
Resolution The resolution determines how detailed a scan is. The resolution is normally defined as the number of dots scanned per inch. The units of resolution are dots per inch. You can also think of it as the density of pixels in the image. The greater the resolution, the greater the image detail you can scan. However, the more detail you have, the greater the amount of data a scan produces.
Zoom The zoom function causes an image scanned at the same resolution as the output device to be output at a greater size than the original. The zoom function can be set independently from the resolution setting. Since the zoom function enlarges or shrinks the image of the original document, the data amount expands or shrinks in response to the zoom setting.
Scanning area The maximum scannable area for each scanner is determined by the physical dimensions of the document table. You can also use commands to tell the scanner to scan only a certain portion of your document. You set the scanning area in units of pixels. First set the point to begin scanning, and then set the number of pixels beyond that point you wish to scan.
Color setting Setting the color determines the method used for scanning. If you select monochrome scanning, you can specify either red (R), green (G), or blue (B) as the dropout color. The scanner then ignores the specified dropout color when scanning a document. For example, if you want to read a document that has been marked with red pen, you can select the dropout color to be red; the scanner then ignores the red markings and scans only the original document.
Image processing Halftoning For documents with many shade gradations (like a photograph) in full-color mode (24-bit data), you can faithfully reproduce the image on a full-color output device. Some output devices, such as 8-color PC monitors or 8-color printers, cannot faithfully portray a full-color image; however, a method does exist for approximating multiple shades on these types of output devices.
Halftone mode C 1-22 None Dither mode A Dither mode B Dither mode C Dither mode D Overview
Color correction Colors expressed on different types of color output devices vary slightly depending on each device’s characteristics. The color correction feature allows you to adjust colors on output devices to more closely approximate your original document. Using Scanner Features The scanner functions you use will vary, depending both on the type of document you are scanning and the output device you plan to use.
Scanning multiple shade documents for bi-level output devices capable of black and white only When you scan multiple shade documents and output them to devices capable of expressing only black and white, use the following feature settings for best results. Data format 1 bit/pixel/color Image correction Method appropriate to output device Data processing Yes Scanning documents without multiple shades When you scan line drawings, characters, logos, diagrams, etc.
Chapter 2 Command Usage 2 Command Usage 2-1
Execution Commands Execution commands tell the scanner to send back data to the computer. Use execution commands to begin image data transfer from the scanner to the computer, to obtain the scanner ID and status, and to obtain information on the current scanner settings. 1. Start scanning (ESC G) Upon receiving this command, the scanner begins scanning and sending image data to the computer. The scanner sends image data in data blocks that consist of one or more lines.
2. Request ID (ESC I) When the scanner receives this command, it relays the scanner ID information to the computer in the following order. Scanner command level Available resolution values Maximum scannable area (at the highest resolution, with 100% zoom) If you are creating a program for use with different scanner models, you can use this command to determine the features and settings available on the connected scanner model.
5. Request condition (ESC S) This command causes the scanner to send a data block to the computer that contains the current values of the settings for all the scanner’s features. The features available are different for each scanner model. Following is a sample of a B4-level data block sent when the scanner receives this command. The ESC code and command code are ASCII character data. The 1 or 2 bytes of binary data that follow are that command’s setting (parameter) value.
Data Form Commands Data form commands regulate the amount of image data sent to the computer (as determined by the setting for scanning color, resolution, tone, and zoom). 1. Set Color Mode (ESC C) This command sets either color or monochrome scanning. If you select color scanning, you must specify page scanning, line scanning, or byte scanning. Page scanning scans the entire page three times; once for each color. Line scanning scans for each color on a line-by-line basis.
For example, if you specify 8 bits per pixel for each color, the scanner produces 8 bits of data per pixel per color. This requires eight times the data necessary to represent 1 bit/pixel/color. As the number of bits per color changes, the data format for each byte of data changes as shown below: ESC D and other commands Halftone processing with the ESC B command is only available when the number of bits/color/pixel is set to 1 or 2.
3. Set Resolution (ESC R) You can set different values for the resolution for the main scan (horizontal direction) and the sub scan (vertical direction). You can find the resolutions available by reading the scanner’s user’s manual or, from within a program, sending the ID Request command. ESC R and other commands Multiple resolutions are available on all scanners.
Set zoom and other commands. The combination of this command and the ESC R (Set resolution) command determine the maximum number of dots you can scan. You can calculate the number of dots by multiplying the zoom percent by the original dot setting. 5. Set scanning area (ESC A) This command selects the area to be scanned. The main scan and sub scan are set in units of dots (in the current resolution) measured from the origin.
Image Setting Commands Image setting commands are commands that tell the scanner what kinds of image processing to perform on the image data. Brightness settings and gamma correction (adjusting for input and output brightness) settings are examples. 1. Set brightness (ESC L) This command sets the scanning brightness. If the standard brightness setting results in images that are too dark or light, use this command to adjust the brightness.
2. Set gamma correction (ESC Z) This command adjusts the scanned data according to the type of output device you plan to use. The gamma correction setting is independent of any other scanner settings. On B4 and higher-level scanners, you can use the ESC z command to define gamma correction tables to match the unique needs of specific types of documents and output devices.
CRT Display B This setting is suitable for 256-color displays and other displays that are capable of showing multiple color levels. On these types of displays, scanned data appears dark and grainy. CRT Display B gamma correction processes the image data to appear more continuous, improving its display appearance. On identical computers, CRT Display B images appear brighter than CRT Display A images.
3. Download gamma table (ESC z) Using this command, you can select the table used for gamma correction. You can specify the type of output adjustment produced for each of the 256 available color tones. For example, to achieve the following type of image correction, you can set the values determined by the equation below. 4. Set Sharpness (ESC Q) This command is used to emphasize or de-emphasize the edges in your images. Five settings are available. Emphasizing the edges of an image makes it appear sharper.
Image Processing Commands Image processing commands are used to modify scanned data before sending it to the computer. Two commands are available: halftone processing and color correction. 1. Set halftoning mode (ESC B) This com m and enables or disables halftone processing for bi-leveldata and quad-leveldata.The type ofprocessing perform ed is outlined below .H ow ever,the type ofprocessing available differs by scanner m odel.See A ppendix B for details.
❏ Dither mode B Processes data using a 4×4 spiral pattern ❏ Dither mode C Processes data using a 4×4 screen pattern ❏ Dither mode D Processes data using a 8×4 screen pattern ❏ User-defined modes A and B Processes data using the pattern defined with the ESC b command Built-in dither patterns 2-14 Command Usage
ESC B and other commands The scanner ignores the image processing you select with the ESC B command if you have already selected 3 bits/color/pixel or higher with the ESC D command. 2. Download dither pattern (ESC b) This command defines the dither pattern that is selected when you use ESC B to select user-defined dither patterns A and B. You can select square patterns with sizes of 4×4, 8×8, and 16×16. You define the dither pattern by assigning a threshold data value to each pattern member.
To determine the data for a typical spiral dither pattern like the one shown in figure a, multiply the threshold value by 16 and add 8; the results are the values shown in figure b. The data is then sent in the order shown in figure c. 3. Set color correction (ESC M) Color correction adjusts the colors to match those available on your output device. The color produced by different output devices varies depending on the method used to express color.
❏ CRT displays Use for color CRT displays ❏ User defined setting Use for your customized output. ❏ No color correction ESC M and other commands The ESC M command is effective only after you select color line scanning or byte scanning with the ESC C command. 4. Download color correction (ESC m) Using this command, you can set the data for color correction. The scanner converts the color data in accordance with the data specified by this command.
Auxiliary Commands Auxiliary commands are provided for physical operation of the scanner. These commands include the reset command and option operation commands. 1. Initialize the scanner (ESC @) This command returns all scanner settings to their original values (the values when the scanner is first turned on). The carriage returns to the home position. However, the definitions created with the ESC b and ESC z commands are not erased. 2.
3. Set the line counter (ESC d) Sending this command causes the scanner to send data in block format. If you don’t send this command at the beginning of each job, the scanner defaults to line mode and sends data after each line is scanned. You can set the parameter in this command from 1 to 255 lines. This tells the scanner how many lines to send to the computer at a time. In other words, setting the parameter to 10 results in the printer sending scanned data in blocks 10-lines long.
4. Control option (ESC e) This command is effective only when an option has been installed on the scanner. If you send these commands when no option is installed, the scanner returns a NAK signal and a command error results. You can check if an option is installed by either using the ESC f command or by checking the option flag in the status byte.
2. Abort scanning (CAN) Usually you send an ESC G command to start scanning and, after the scanner sends a data block, the computer responds with an ACK code to confirm the data was received. If the computer sends a CAN code instead of the ACK code, the scanner cancels scanning and stops sending data. The scanner recognizes the CAN code only after it has sent a data block and is waiting to receive the ACK code from the computer.
Command Order By using the Request ID (ESC I) command, you can determine the scanner model. This allows you to create software that sends only the commands featured on that particular model. Always check the scanner ID before making settings with software commands.
3. Maximum scannable area This value is expressed in units of dots (main scan × sub scan), based on the maximum scannable area available when the scanner is set to the highest available resolution and zoom is set to 100%. Control flow Using the ID information, you should send commands to the scanner in the following order. 1. Obtain the scanner’s ID information by sending the ESC I command. 2.
Recommended command order Send commands in the following order to control the scanner properly. Make sure to send the ESC R, ESC H, ESC A, and ESC G commands in the following order.
5. Following the order on the previous page, send the command to set the scanning area and send any other commands necessary to prepare for scanning. For details on these commands, see Chapter 3. 6. Send the ESC f command. Check if the option is enabled and make sure no error has occurred. In an error occurs, perform the proper error recovery procedures. 7. Send the ESC G (Start scanning) command. 8. Receive the image data.
Data Block Transfer Order The computer sends commands and parameters to the scanner in 8-bit code format. The scanner sends data to the computer in groups of 8-bit codes called ‘‘blocks.’’ Data block structure Data blocks can take two forms: line data structure and block data structure. Note: The scanner must support the ESC d (Set line counter) command and be function level B4 or higher to transfer data using the block data structure.
Block data structure Block data consists of a 6-byte information block followed by n lines of image data (n is the value of the line counter in the information block). You specify block data transfer with the ESC d (set line counter) command. By sending multiple lines of data at once, you can shorten the total data transfer time. The information block size is fixed at 6 bytes. You can use the byte counter and line counter in the information block to determine the amount of data (number of bytes).
Status byte This byte indicates the color of the image data or the state of the scanner. Each bit in the Status byte has a different meaning, as shown in the following diagram. Currently, bits 0, 1, and 6 are reserved (not used). Error flag (bit 7) This flag is set to ‘‘1’’ when an error other than a command error occurs. In this case, no data follows, so the byte counter is set to 0 (00H, 00H). If a system error occurs, the scanner accepts only the ESC F and ESC f commands.
Scanning color (bits 2 and 3) These bits indicate the scanning color. When monochrome is selected, these bits indicate the dropout color (if a dropout color is selected). Byte counter The byte counter indicates the number of data bytes contained in each data line.
Data This is the data block following the information block. The type of data in the data block depends on the type of information requested by the computer.
The scanner function level The available resolutions The maximum scannable area The basic format of this data is as follows: The first two bytes show the scanner function level, in ASCII character format. The scanner function level tells you which commands are supported by the attached scanner. Following these two bytes are the available scanner resolutions, described in 3-byte groups. Multiple resolutions are listed, and the available resolutions differ according to scanner model.
Scanner state data This is the data sent in response to the ESC S (Request condition) command. The example below is for a B4-level scanner. The first two bytes are the ESC C (Set color) command’s parameters. The next 5 bytes are the ESC R (Set scanning resolution) command’s parameters. The last two bytes are the ESC g (Set scanning mode) command’s parameters. Transfer order The recommended order of data transfer for each type of data is outlined in the flow charts below.
Image data Monochrome, color line, and color byte scanning Use when sending monochrome and color line scanning data or color byte scanning data. This includes monochrome scanning when a dropout color is selected.
Color page scanning Use when sending color page data.
Single data blocks Use when you expect single data blocks in response to the ESC I (Request ID) command, the ESC S (Request condition) command, the ESC F (Request status) command, and the ESC f (Request extended status) command. Scanning Area The following commands affect the scanning area: the ESC R (Set resolution) command, the ESC H (Set zoom) command, and the ESC A (Set scanning area) command. The parameter values in the ID information are used in these commands.
Resolution, zoom, and maximum scannable area The ID information provides you the following values. RMAX (in dpi) : The maximum scannable area available XMAX (in dots) : The maximum main scan value (at the maximum resolution, 100% zoom) YMAX (in dots) : The maximum sub scan value (at the maximum resolution, 100% zoom) Based on these values, you can calculate the maximum scannable area for various resolution and zoom settings according to the following formulas.
The main scan reading length (n3) must always be set in exact multiples of eight (8-dot units equal units of 1 byte). The main scan skip length (n1), sub scan skip length (n2), and sub scan reading length (n4) can be set in 1-dot increments. Use the above values to set the scanning area with the ESC R, ESC H, and ESC A commands. Note: The ESC A command sets the length (number of lines) of the sub scan reading length.
Setting the scanning area Use the ESC R, ESC H, and ESC A commands to set the scanning area. The diagram below shows the relationship between the ESC R, ESC H, and ESC A command parameters and the scanning area.
n1 = INT L X 1 × RX × H X 100 n2 = INT L Y 1 × RY × H Y 100 LX2 × R X × HX n3 = 8 × INT × 100 n4 = INT 1 8 LY2 × RY × HY 100 maximum main scan length × RX × H X n1 + n3 ≤ INT 100 maximum resolution maximum sub scan length RY × HY n2 + n4 ≤ INT × maximum resolution 100 Command Usage 2-39
Image trimming (1) This section explains how to trim a rough image, and how to use the ESC R, ESC H, and ESC A commands to rescan at the same resolution and zoom values. This is useful when you want to check the image from within your software and then reset the scanning area for the next scan.
Determining setting values after trimming After trimming an image, you should resend the ESC A command using the following parameters.
Image trimming (2) This section explains how to use the ESC R, ESC H, and ESC A commands to print a trimmed image on your printer.
Determining the setting values for printing Based on the size of the image you plan to print and on the resolution of the printer, use the following formulas to determine the final scanning settings.
Error Processing EPSON scanners have four types of potential errors: command errors, communications errors, system errors, and option errors. An option error can occur only with scanner models on which the optional Automatic Document Feeder or Transparency Unit can be installed. When an error occurs, the LED indicator displays the error type. For details, see the scanner’s user’s manual. Command error This error occurs when the scanner receives an incorrect command or a command with incorrect parameters.
The communications (interface) settings are incorrect. Scanner’s response: The lamps turn off and the scanner stops moving. The scanner stops accepting commands. Error recovery procedure: After correcting the communications problem, perform one of the following. Turn the scanner off and then back on again. Press the reset button (if the scanner model has a reset button). Set the parallel interface’s INIT signal to LOW. Send a device reset message on your SCSI line. Set the SCSI’s reset line to active.
Bit 7 (error flag) of the status byte is set to ‘‘1.’’ The appropriate bit in the extended status byte is set. The scanner only accepts these commands: ESC F, ESC f, and ESC @. Error recovery procedure: After correcting the cause of the problem, perform one of the following. Turn the scanner off and then back on again. Press the reset button (if the scanner model has a reset button). Send the ESC @ command. Set the parallel interface’s INIT signal to LOW. Send a device reset message on your SCSI line.
Function Level and Commands Each function level builds on the previous level, so all commands and parameters in previous levels are included in higher levels. Extended commands are available regardless of function level. Using the function level Higher function levels include all the commands of lower function levels. Your programs should always check the function level of the connected scanner and should send only those commands available on that level.
Commands and function level table The following table shows which commands are available at each function level.
Function level and commands The commands added at each function level are listed in the table below.
Items not affected by function level Although higher command levels include all the previous commands of lower command levels, the parameters for commands used to set the scanning area (ESC R, ESC H, ESC A) are independent of function level. These parameters are determined by the physical characteristics of each scanner; obtain the values available for these parameters by checking the ID information.
Typical Programming Errors and Solutions This section lists several concrete examples of programming errors, their causes, and sample solutions to these problems. Problem: The scanner does not scan correctly when a scanner with a different maximum scannable area is connected. Cause You relied on the default maximum scannable area setting instead of setting the scanning area with the ESC A command. The maximum scannable area differs by scanner model.
Problem: When connecting a different scanner model in your SCSI daisy chain, an error message such as the following appears; ‘‘The EPSON scanner is not connected.’’ Cause When you sent the SCSI inquiry command, the computer checked the scanner’s model name in the Vendor Unique Parameter. Solution When checking the Vendor Unique Parameter, only check the following underlined items: ...‘‘EPSON’’,20H,SCANNER,20H,‘‘GT-XXXX’’... (B1−B4) ...‘‘EPSON’’,20H,20H,20H,SCANNER,20H, ‘‘GT-XXXX’’...
Problem: After connecting a scanner with a higher function level than the previous scanner, the new scanner does not operate properly. Cause Although you used the ESC I command to obtain the function level information, your program was set up to work only when the function level was the same as the previous scanner. Solution EPSON scanner function levels are designed so that higher levels encompass all the commands of lower levels. Change your program so it works with scanners of equal level or higher.
Problem: The scanner scans properly when you use a bi-directional parallel interface, but when you switch to SCSI, the scanner no longer operates properly. Cause During block data transfer mode, your program does not read the entire block at one time, but performs multiple read commands for each data block. Solution Change your program so it reads the entire block in one read operation.
Problem: When connecting a different scanner model, a time-out occurs on your computer and you can no longer scan. Cause The time required for the initialization process and for the preparation time when you send an ESC G command differs by scanner model. The new scanner model took longer than the previous scanner. Solution Make sure you provide enough time on your time-out clock to handle all scanner models (35 seconds should be enough).
General ❏ Always reset the scanner at the beginning and end of your programs ❏ Use the ESC @ command to reset the scanner. This allows you to use the same program with different interfaces. ❏ The time required for resetting differs by scanner model. Because of this, you should either disable your computer’s time-out or set the time-out clock to 30 seconds or more.
Chapter 3 Command Reference 3 Command Reference 3-1
Summary of the Scanner Commands Five types of scanner commands are used with EPSON scanners. In addition, four control codes are used for handshaking.
Image definition commands Set conditions for image reading with these commands. Set brightness Set gamma correction Download gamma table Set sharpness ESC L ESC Z ESC z ESC Q Image processing commands Process images before data transfer with these commands. Set halftoning mode Download dither pattern Set color correction Download color correction Set auto area segmentation ESC B ESC b ESC M ESC m ESC s Supplemental commands Operate the scanner mechanism with these commands.
Format of the Command Reference The command explanations in this chapter are each divided into six parts. The command explanations are given in the sequence indicated in the command summary table on the preceding page. (For recommendations on how to use the commands, see Chapter 2.
Handshaking Shows a diagram indicating the handshaking method used with the command. See Chapter 2 for details on handshaking. Parameter range Shows the range and explains the meanings of parameters, when relevant. This section also lists the default values. Explanation This gives a detailed explanation of the effect and appropriate usage of the command. Functional level Lists values such as B1 and B4 on the command line and in the parameter range to indicate the ESC/I function level of the command.
Execution Commands ESC I Request identity Format: B1 B2 B3 B4 B5 A5 Command:ASCII: ESC I Decimal: 27 73 Hexadecimal: 1B 49 Parameter: (none) Handshaking: 1 ESC I command 2 data block Explanation: This command requests the scanner to send back a data block that identifies the properties of the scanner. When this command is received, the scanner sends the following information.
For a more detailed explanation on using the ESC I command and the contents of the returned data block, see Chapter 2 and Appendix B. The length of the data block varies depending on the scanner model. The host computer should check the byte counter. Contents of the ESC I (identity) data block The contents of the ESC I data block for each scanner model are listed in Appendix B.
ESC F Request status Format: B1 B2 B3 B4 B5 A5 Command:ASCII: ESC F Decimal: 27 70 Hexadecimal: 1B 46 Parameter: (none) Handshaking: 1 ESC F command 2 data block Explanation: When this command is received, the scanner sends a data block indicating the current status of the scanner. The current status can be determined by reading the flags of the status byte. See Chapter 2 for details on the status byte. The data block contains only an information block, and is not followed by data.
Contents of the ESC F (status) data block Order of byte Data (in hex) Contents Explanation 1 02 STX code Header: indicates the beginning of the data block 2 xx Status Status byte: indicates the status of the scanner 3 00 0 bytes 4 00 Byte counter: indicates the number of bytes of data (The null value indicates that no data follows) Note: The numerical value of the byte counter consists of two bytes, and the lower byte precedes the higher byte.
ESC f Request extended status Format: EXT Command:ASCII: ESC f Decimal: 27 102 Hexadecimal: 1B 66 Parameter: (none) Handshaking: 1 ESC f command 2 Data block Explanation: When this command is received, the scanner sends a data block indicating the current status of the scanner and any optional equipment. The current status can be determined by reading the flags of the status byte and the following bytes of status data.
Contents of the ESC f (extended status) data block Order of byte Data (in hex) Contents Explanation 1 02 STX code Header: indicates the beginning of the data block 2 xx Status byte Byte: indicates the status of the scanner 3 00 33 bytes 4 00 Byte counter: indicates the number of bytes of status data 5 xx Scanner status ‘‘1’’ in bit 7 indicates a fatal scanner error 6 xx ADF status Bit 7: IST Bit 6: EN Bit 5: ERR Bit 3: PE Bit 2: PJ Bit 1: OPN 7 xx 8 xx Maximum area (4 bytes) I
ESC S Request condition Format: B1 B2 B3 B4 B5 A5 Command:ASCII: ESC S Decimal: 27 83 Hexadecimal: 1B 53 Parameter: (none) Handshaking: 1 ESC S command 2 Data block Explanation: This command asks the scanner to send back a data block that contains the current parameter values set in the scanner. The structure of returned values is identical to the structure of the command parameters.
ESC G Start scanning Format: B1 B2 B3 B4 B5 Command:ASCII: Parameter: ESC G Decimal: 27 71 Hexadecimal: 1B 47 (none) Handshaking: The handshaking procedures are different for the monochrome mode, color page sequence mode, color line sequence, and color byte sequence mode. See Chapter 2 for more details on handshaking. Monochrome mode (one time scanning) Monochrome image data is sent as a page.
The color image data is sent as a set of three primary color pages. 1 2 3 4 ESC G command Data block (image data for one block) ACK code Last data block (last line of each color page) ❏ Steps 2 and 3 should be repeated for the number of lines (minus 1) specified for each color page of green, red, and blue until the last data block is encountered. ❏ Do not send the ACK code after the last data block of each color page.
❏ Steps 2 and 3 should be repeated for the three colors for the number of lines (minus 1) specified for the image until the last data block is encountered. ❏ Do not send the ACK code after the last data block (the last blue data).
Explanation: When this command is received, the scanner starts a scanning operation (image reading) for the specified reading area, and sends the image data to the host computer as data blocks. Image data of one line (one main scan of data) is sent as a data block, and a data block is sent for each sub scan reading length. When the computer receives a data block, it should send an ACK code to indicate that it has accepted the data block and to prompt the scanner to send the next data block.
1 2 3 4 5 ESC G command Data block (image data for one block) ACK code (acceptance of the data block) CAN code (abort scanning) ACK code Sending the CAN code does not reset the parameter settings in the scanner, unless the ESC @ (initialize the scanner) command is sent, or the scanner is turned off and back on. Settings made with the control panel remain in effect unless corresponding commands are sent to override them. To restart scanning, send the ESC G command again.
Data Form Definition Commands ESC C Set color mode Format: B1 B2 B3 B4 B5 A5 Command: ASCII: ESC C Decimal: 27 67 Hexadecimal: 1B 43 Parameter: Handshaking: 1 2 3 4 3-18 ESC C command ACK code Parameter (i) ACK code Command Reference i
Parameter range: i=00H (0): Monochrome scanning (standard), no dropout color specified B1 B2 B3 B4 B5 A5 i=10H (16): Monochrome scanning, dropout color is Red B2 B3 B4 B5 i=20H (32): Monochrome scanning, dropout color is Green B2 B3 B4 B5 i=30H (48): Monochrome scanning, dropout color is Blue B2 B3 B4 B5 i=01H (1): Color scanning (color sequence is G→R→B) of page sequence mode B1 B2 B3 B4 B5 i=02H (2): Color scanning (color sequence is G→R→B) of line sequence mode B3 B4 B5 i=03H (3): Color scanning (color s
Explanation: This command specifies the reading color (color or monochrome), the page, line, or byte sequence mode in color reading, and the dropout color in monochrome reading. ❏ Color page sequence reading The scanner scans the document three times, for green, red, and blue, and produces three pages of image data that can be overlaid to reproduce a full color image.
❏ Dropout colors (monochrome reading only) The dropout color is the color that is treated as white, and is not read during the scanning operation. On a color scanner a dropout color can be chosen from among green, red, or blue. Dropout color can be used to avoid reading a certain color of the document. For example, corrections written in red on a draft can be erased by specifying the red dropout color. The settings of 10H, 20H, and 30H should be used only to intentionally specify a dropout color.
ESC D Set data format Format: B1 B2 B3 B4 B5 A5 Command:ASCII: ESC D Decimal: 27 68 Hexadecimal: 1B 44 Parameter: i Handshaking: 1 2 3 4 ESC D command ACK code Parameter (i) ACK code Parameter range: i = 01H to 08H (1 to 8 bit/pixel/color) Default value: i = 01H (1 bit/pixel/color) Explanation: This command specifies the number of bits that represent a pixel as the data format, in a range from 1 to 8 bits per pixel per color.
In the color scanning mode, the data format setting defines tones for each of the three primary colors, green, red, and blue.
❏ 3-24 Upper bits beginning with the MSB are valid. Lower bits not in use are fixed to 0.
ESC R Set resolution Format: B1 B2 B3 B4 B5 A5 Command:ASCII: Parameter: ESC R Decimal: 27 82 Hexadecimal: 1B 52 n1L n2L n2H n1H Handshaking: 1 2 3 4 ESC R command ACK code Parameter (n1, n2) ACK code Parameter range: n1L, n1H = main scan resolution (lower byte, higher byte) n2L, n2H = sub scan resolution (lower byte, higher byte) Default values: n1 = 100, n2 = 100 (in dpi) Command Reference 3-25
Explanation: This command sets the reading resolution of the main scan and sub scan. n1 = Main scan resolution setting in dpi n2 = Sub scan resolution setting in dpi The settings available on each scanner model are listed in Appendix B. The settings available can be checked with the identity data block that is obtained with the ESC I (Request identity) command. If a value other than an available setting is received, a command error occurs, the command is ignored, and the current setting remains in effect.
ESC H Set zoom Format: B2 B3 B4 B5 A5 Command:ASCII: ESC H Decimal: 27 72 Hexadecimal: 1B 48 Parameter: i1 i2 Handshaking: 1 2 3 4 ESC H command ACK code Parameter (i1, i2) ACK code Parameter range: 32H (50) ≤ i1 ≤ C8H (200) 32H (50) ≤ i2 ≤ C8H (200) i1 = 50 to 200 (Main scan zoom, in %) i2 = 50 to 200 (Sub scan zoom, in %) Default values: i1 = 64H (100), i2 = 64H (100) Command Reference 3-27
Explanation: This command specifies the zoom values for the main scan (i1) and the sub scan (i2) in the range of 50% to 200%. The zoom value increment is 1% or 10%, depending on the scanner model. See Appendix B for details. When the zoom is set with the control panel, the zoom value of the main scan and sub scan are equal. The setting made with this command overrides the setting made from the control panel.
ESC A Set scanning area Format: B1 B2 B3 B4 B5 A5 Command:ASCII: Parameters: ESC A Decimal: 27 65 Hexadecimal: 1B 41 n1L, n1H, n2L, n2H, n3L, n3H, n4L, n4H Handshaking: 1 2 3 4 ESC A command ACK code Parameter (n1, n2, n3, n4) ACK code Parameter range: n1L, n1H = main scan offset length in dots (lower byte, higher byte) n2L, n2H = sub scan offset length in dots (lower byte, higher byte) n3L, n3H = main scan reading length in dots (lower byte, higher byte) n4L, n4H = sub scan reading length
Default value: Varies according to scanner model. See Appendix B for details. Explanation: This command specifies the scanning area as a rectangle measured from the origin, with lengths for the main scan and sub scan. The setting is made in units of dots (pixels). The maximum values are determined by the current resolution (ESC R) and zoom (ESC H) settings.
The offset and scanning lengths (n1 to n4) should be integer values within the available range of the main scan length and sub scan length. The maximum main scan and sub scan lengths are determined by the current resolution and zoom settings, and the parameter range for the ESC A parameter falls within the values shown below.
The physical distance of the offset lengths and scanning lengths depends on the current dpi and zoom settings. For example, when the main scan and sub scan lengths are set to 400 dots and 640 dots respectively (at 100 dpi and 100%), the physical lengths are 4 inches (10.16 cm) and 6.4 inches (16.26 cm) respectively. Relation to other commands The reading area is reset to the maximum value when the ESC R (Set resolution) command or ESC H (Set zoom) command settings are made.
Reading area The figure below illustrates the scanning area definition. c Caution: Ifthe reading area param eters are w rong,a com m and error occurs in the scanner.The m ost likely m istake isthatthe value used for the m ain scan isnot a m ultipleof8.The m axim um value ofn3 isdifferentfor each scanner.The offset length can be set in unitsofone.
ESC K Set data order Format: B5 A5 Command:ASCII: ESC K Decimal: 27 75 Hexadecimal: 1B 4B Parameters: i Handshaking: 1 2 3 4 ESC K command ACK code Parameter (i) ACK code Parameter range: i = 00H (0): Left top first (from left to right) i = 01H (1): Right top first (from right to left) Default values: i = 00H i=0:Lefttop first 3-34 Command Reference i=1:Righttop first
Explanation: This command selects the order of image data. The position of the origin is not affected by the order.
Image Definition Commands ESC L Set brightness Format: B2 B3 B4 B5 A5 Command: ASCII: ESC L Decimal: 27 76 Hexadecimal: 1B 4C Parameter: Handshaking: 1 2 3 4 3-36 ESC L command ACK code Parameter (i) ACK code Command Reference i
Parameter range: Default value: i = 00H (center) Command Reference 3-37
Explanation: This command sets the brightness level of the scanned image data. Seven values for i are available: 00H, 01H, 02H, 03H, FFH, FEH, and FDH. The graph below shows the differences between the brightness settings when gamma correction is set for the CRT Display A setting. Note: The brightness parameter is not available if a user-defined gamma correction table (see ESC Z) is selected.
ESC Z Set gamma correction Format: B2 B3 B4 B5 A5 Command:ASCII: ESC Z Decimal: 27 90 Hexadecimal: 1B 5A Parameter: i Handshaking: 1 2 3 4 ESC Z command ACK code Parameter (i) ACK code Parameter range: i = 01H (1) : CRT Display A B2 B3 B4 B5 A5 i = 02H (2) : CRT Display B B2 B3 B4 B5 A5 i = 00H (0) : Printer Output A B2 B3 B4 B5 A5 i = 03H (3) : User-defined Gamma Table B4 B5 A5 i = 10H (16) : Printer Output B B2 B3 B4 B5 A5 i = 20H (32) : Printer Output C B2 B3 B4 B5 A5 Default value: i =
Explanation: This command specifies the gamma correction setting for the output device. The gamma correction refers to the gamma correction table stored in the scanner’s internal memory, and adjusts the conversion ratio between the input intensity of the original image and the output image data values. The various predefined mode settings have the following characteristics.
Printer Output A (High density printers) This setting is appropriate for printing on high density printers, such as 24-dot printers and laser printers. Since high density printing increases the darker components of the image, this setting compensates by producing data that is lighter than that used by a CRT display. Printer Output B (Low density printers) This mode is suitable for low density printing on 8 dot (9 pin) printers.
ESC z Download gamma table Format: B4 B5 A5 Command:ASCII: Parameter: ESC Decimal: 27 122 Hexadecimal: 1B 7A i d (256 bytes) Handshaking: 1 2 3 4 ESC z command ACK code Parameters (i, d) ACK code Parameter range: i = ’’m’’ or ’’M’’ : Monochrome i = ‘‘r’’ or ‘‘R’’ : Red i = ‘‘g’’ or ‘‘G’’ : Green i = ‘‘b’’ or ‘‘B’’ : Blue Default value: i = ‘‘m’’ or ‘‘M’’ 3-42 z Command Reference
Explanation: This command downloads a user-defined gamma correction table to the scanner. This command is used when suitable gamma correction is not provided by any of the five gamma correction tables built into the scanner. Specify ‘‘m’’ or ‘‘M’’ for the i parameter when defining a gamma correction table for monochrome scanning, or when setting the same gamma correction tables for all color component colors (red, green, and blue).
ESC Q Set sharpness Format: B4 B5 A5 Command:ASCII: ESC Q Decimal: 27 81 Hexadecimal: 1B 51 Parameter: i Handshaking: 1 2 3 4 ESC Q command ACK code Parameter (i) ACK code Parameter range: i = FEH : More defocused i = FFH : Defocused i = 00H : Normal i = 01H : Sharp i = 01H : Sharper Default value: i = 00H Explanation: This command selects from the five sharpness levels indicated above.
Image Processing Commands ESC B Set halftoning mode Format: B1 B2 B3 B4 B5 A5 Command:ASCII: ESC B Decimal: 27 66 Hexadecimal: 1B 42 Parameter: i Handshaking: 1 2 3 4 ESC B command ACK code Parameter (i) ACK code Command Reference 3-45
Parameter range: i= 00H (0): Enable halftoning mode A (hard tone): B1 B2 B3 B4 B5 A5 i= 10H (16): Enable halftoning mode B (soft tone): B2 B3 B4 B5 A5 i= 20H (32): Enable halftoning mode C (net-screen): B2 B3 B4 B5 i= 80H (128): Dither mode A (4 x 4 Bayer): B4 B5 A5 i= 90H (144): Dither mode B (4 x 4 spiral): B4 B5 A5 i= A0H (160): Dither mode C (4 x 4 net screen): B4 B5 A5 i= B0H (176): Dither mode D (8 x 4 net screen): B4 B5 A5 i= C0H (192): User-defined dither pattern A: B4 B5 A5 i= D0H (208): User-defin
Each halftoning mode has the following characteristics. Halftoning mode A (hard tone) The image is processed to produce hard tones, to express distinction. This mode is suitable for most purposes. Halftoning mode B (soft tone) The image is processed to give soft tones. This mode is suitable for images that contain large areas of similar tones.
Halftoning mode C (net-screen) The image is processed so that it is represented similar to the net screen used in newspaper printing. The gradations of the tones are represented by clusters of different numbers of dots. Dither modes A, B, C, and D (fixed pattern dithering) These modes have the following dither patterns.
ESC B and other commands This command is not available if a value other than 01H (1 bit per pixel per color) and 02H (2 bits per pixel per color) is specified with the ESC D (Set data format) command. If a user-defined dither pattern is specified when none has been downloaded, the Dither mode A is selected. The parameter 03H is effective only when ESC D 01H is specified. Text Enhancement Technology is available only when or monochrome reading is specified with ESC C.
ESC b Download dither pattern Format: Command: B4 B5 A5 ASCII: ESC b Decimal: 27 98 Hexadecimal: 1B 62 j d(j2) Parameter: i Handshaking: 1 2 3 4 5 ESC b command ACK code Parameter i j Parameter d (j2) ACK code Parameter range: i = 00H : User pattern A i = 01H : User pattern B j = 04H : 4 x 4 matrix j = 08H : 8 x 8 matrix j = 16H : 16 x 16 matrix d : Threshold value 0 ≤ d ≤ 255 Default value: No user definition 3-50 Command Reference d(16) d(64) d(256)
Explanation: This command sets the threshold values for user-defined dither patterns. The patterns defined with this command can be selected by the ESC B command. Parameter i can be 0 or 1, allowing you to define two dither patterns. Parameter j determines the number of pixels on one side of the dither matrix square. The square can be 4 × 4, 8 × 8, or 16 × 16 pixels. Parameter d is data representing the threshold values of the pixel positions in the matrix.
ESC M Set color correction Format: Command: B3 B4 B5 ASCII: ESC M Decimal: 27 77 Hexadecimal: 1B 4D Parameter: i Handshaking: 1 2 3 4 ESC M command ACK code Parameter (i) ACK code Parameter range: i = 10H (0) : For color impact dot matrix printers i = 01H (1) : User defined value i = 20H (32) : For color thermal transfer printers i = 40H (64) : For color ink jet printers i = 80H (128) : For color CRT displays Default value: i = 80H Explanation: This command specifies the color correction to
This command is valid only when color line sequence reading or byte sequence is specified by the ESC C (Set color) command. The parameter 01H setting is effective only after downloading color correction with ESC m.
ESC m Download color correction Format: Command: B4 B5 ASCII: ESC m Decimal: 27 109 Hexadecimal: 1B 60 Parameter: Handshaking: 1 2 3 4 3-54 ESC m command ACK code Parameter (d1 ~ d9) ACK code Command Reference d1, d2, d3, d4, d5, d6, d7, d8, d9
Parameter range: -127 ≤ d1, d2, d3, d4, d5, d6, d7, d8, d9 ≤ 127 Each data is a signed byte, and the data format is as follows. MSB LSB X X X X X X X X Absolute value Sign bit, 0: positive (+), 1: negative (-) Explanation: This command downloads 9 coefficient data bits for color correction. A scanner converts color data according to the following formula.
ESC s Set auto area segmentation Format: Command: A5 ASCII: ESC s Decimal: 27 115 Hexadecimal: 1B 73 Parameter: i Handshaking: 1 2 3 4 ESC s command ACK code Parameter (i) ACK code Parameter range: i = 00H: Disable auto area segmentation i = 01H: Enable auto area segmentation (Text area = TET OFF, Photo area = [ESC B]) i = 02H: Enable auto area segmentation (Text area = TET ON, Photo area = [ESC B]) N ote: TET (TextEnhancem entTechnology [ESC B])isavailablew hen the data form atissetto 1 b
Auxiliary Commands ESC @ Initialize the scanner Format: Command: B2 B3 B4 B5 A5 ASCII: ESC @ Decimal: 27 64 Hexadecimal: 1B 40 Parameter: (none) Handshaking: 1 ESC @ command 2 ACK code Explanation: When this command is received, the scanner initializes itself, and the command settings are reset to the default values. Downloaded data, such as user-defined dither patterns, remains.
ESC d Set line counter Format: Command: B4 B5 A5 ASCII: ESC d Decimal: 27 100 Hexadecimal: 1B 64 Parameter: i Handshaking: 1 2 3 4 ESC d command ACK code Parameter i ACK code Parameter range: 0 ≤ i ≤ 255 Explanation: This command sets the number of the line counter for use with block-structure data blocks. This makes it possible for the scanner to send multiple lines of image data in one data block. The line counter setting is canceled upon execution of the ESC G (Start scanning) command.
Parameter i determines the number of image lines that are included in the data block. The value specified must be greater than 0 and less than or equal to 255. (If 0 is specified, the scanner returns NAK in response to this command.) When the block data transfer mode is enabled with this command, the receiving host computer must check the line counter and byte counter in the data block to ensure the image data is received correctly.
ESC g Set scanning mode Format: Command: B4 B5 A5 ASCII: ESC g Decimal: 27 103 Hexadecimal: 1B 67 Parameter: i Handshaking: 1 2 3 4 ESC g command ACK code Parameter i ACK code Parameter range: i = 00H : Normal mode i = 01H : High speed mode Default value: 00H Explanation: This command selects scanning in the high-speed mode or the normal mode. When the high-speed mode is selected, the carriage moves at about twice the speed of the normal mode.
The high-speed mode is suitable when scanning bi-level originals, such as text and line art. When scanning continuous tone images, as with 8-bit monochrome and 24-bit color scanning, use the normal mode. Note: ❏ To obtain the full benefit of high-speed data transfer, use the high speed scanning mode in combination with block-structure data lock transfer. ❏ The actual effectiveness of high speed scanning may be limited by host computer conditions, such as processing speed.
ESC e Control option Format: Command: EXT* ASCII: ESC e Decimal: 27 101 Hexadecimal: 1B 65 Parameter: i Handshaking: 1 2 3 4 ESC e command ACK code Parameter i ACK code Parameter range: i = 01H : Enable option i = 00H : Disable option Default value: 00H Explanation: This command enables or disables the option. Upon execution of this command, the ESC C (Set color) command is reset to the default value (i=00H: Standard monochrome).
Command Reference 3-63
FF Eject document Format: Command: EXT ASCII: FF Decimal: 12 Hexadecimal: 0C Parameter: (none) Handshaking: 1 FF code 2 Data block Explanation: Upon receiving this command, the scanner ejects the document currently loaded in the Automatic Document Feeder.
Control Codes The following four codes are used to control handshaking and data transfer between the computer and scanner. STX Header Format: ASCII: STX Decimal: 2 Hexadecimal: 02 Explanation: This code is used by the scanner and indicates the beginning of a data block.
CAN Abort scanning Format: ASCII: CAN Decimal: 24 Hexadecimal: 18 Explanation: This code aborts a scanning operation, and returns the scanner to the command waiting mode (ready state). An ACK code is returned from the scanner. This code should be sent by the computer in place of an ACK code during scanning operation. See the explanation of the ESC G command for more details. The CAN code is valid only when the scanner is waiting for an ACK code during a scanning operation.
ACK Normal response (acknowledge) Format: B1 B2 B3 B4 B5 A5 ASCII: ACK Decimal: 6 Hexadecimal: 06 Explanation: This code is used by both the scanner and computer for handshaking. This code indicates that a command, a set of parameters, or a data block was legal and accepted by the receiving device. The computer should always send an ACK code in response to a data block sent from the scanner, except after the last data block of a page of image data.
NAK Abnormal response (negative acknowledge) Format: B1 B2 B3 B4 B5 A5 ASCII: NAK Decimal: 21 Hexadecimal: 15 Explanation: This code is used by the scanner for handshaking. This code indicates that a command or a parameter was illegal and not accepted by the scanner. When the NAK code is returned from the scanner, it means a command error has occurred in the scanner, and the command was ignored. To recover from a command error, resend a legal command or a command followed by a legal parameter.
Appendix A Interface Specifications A Interface Specifications A-1
Serial Interface Specifications Interface type: RS-232C(D) compatible Transfer method: Asynchronous Transfer speed: Scanner model dependent Data format: Scanner model dependent Handshaking: ACK/NAK codes software handshaking Signal voltage: Logic ‘‘1’’, MARK = -3V to -27V Logic ‘‘0’’, SPACE = 3V to 27V Connector type: DB-25 (D-sub 25-pin).
Signal pin assignments In this table, the direction of the signals is given relative to the scanner. Pin No. Signal I/O Description 1 C.GND - Chassis ground 2 TXD Out Transmit data 3 RXD In Receive data 4 RTS Out Request to send 5 CTS In Clear to send 6 DSR In Data set ready 7 S.GND - Signal ground 8−19 NC - - 20 DTR Out Data terminal ready 21−25 NC - - Cable wiring A typical example of cable wiring is shown below.
Parallel Interface Specifications Interface type: Bi-directional parallel interface Data format: 8-bit parallel Synchronization: By external strobe pulse Handshaking: By ACKNLG and BUSY signals Logic level: Input/output data and interface control signals are TTL level compatible.
Signal pin assignments In this table, the direction of the signals is given relative to the scanner. Pin No. Return pin Signal I/O Comment 1 19 STROBE IN STROBE pulse to read in or send out data. Pulse width must be more than 0.5 microseconds at the receiving terminal. 2 20 DATA0 IN/OUT 3 21 DATA1 IN/OUT 4 22 DATA2 IN/OUT 5 23 DATA3 IN/OUT These signals represent information of bits 1 to 8, respectively.
A-6 18 - NC - Not used 19−30 - NC - Twisted-pair return signal ground level 31 - INIT IN When this signal level goes Low, the scanner is reset to its power-up state. This level is usually High. The pulse width must be more than 50 microseconds at the receiving terminal.
Timing charts The figures below show the timing for the bi-directional parallel interface.
SCSI Interface Specifications Basic Specification Any item not included in this specification is in conformance with ANSI Standard X3.131-1986. Functions The following functions covered by ANSI Standard X3.131-1986 are included. i) ii) iii) iv) BUS FREE phase ARBITRATION phase RESELECTION phase COMMAND phase With this device, the LUN (Logical Unit Number) is fixed at 0. The command link function is not supported.
ID Switch Setting The SCSI ID is set with the ID switch mounted on the back of the scanner. The ID switch numbers correspond to the available ID and can be set from 0 to 7. The numbers 8 and 9 should not be used. Command Chart This device uses the following group 0 processor commands.
Peripheral device type : 03H (processor) : 00H RMB : 0B Device type qualifier : 00H : 00H ISO version : 0H ECMA version : 0H ANSI version : 0H Reserved : 00H Additional length : 23H Reserved : 00H, 00H, 00H Vendor unique parameter byte : ‘‘EPSON’’, 20H : ‘‘SCANNER’’, 20H, ‘‘**************’’, 20H, 20H, 20H, ffH : ‘‘EPSON’’, 20H, 20H, 20H : ‘‘SCANNER’’, ‘‘**************’’, 20H, ffH Note: ‘‘**************’’: Product name ex. ‘‘GT-8000’’, 20H, 20H, 20H, ‘‘1.
Message List Code Type Message Direction 00H M COMMAND COMPLETE IN 01H−03H O Not Supported 04H O DISCONNECT 05H−06H O Not Supported 07H O MESSAGE REJECT 08H−0BH O Not Supported 0CH O BUS DEVICE RESET 0DH−7FH R (Reserved) 80H−FFH O IDENTIFY IN IN OUT OUT IN OUT M: MANDATORY O: OPTIONAL R: Reserved IN: Initiator ← Target OUT: Target ← Initiator Connector pin arrangement Interface Specifications A-11
Signal pin assignments In this table, the direction of the signals is given relative to the scanner. Signal I/O 50 Pin No. 25 Pin No.
SCSI Operation Procedure This section explains the operational procedures for the SCSI. For details concerning SCSI specifications for individual operations, refer to ANSI X3.131-1986 ‘‘Small Computer System Interface.’’ Communication Operation The following procedure is used to transfer data between the scanner (Target) and a host computer (Initiator). i The Target stands by in the Bus Free Phase until the Initiator selects it.
vi When the unit attention condition is set, the Target sends Check Condition status and then advances to item ix without executing the command. vii The Target rechecks the command operation code. If the command is Test Unit Ready, the command is executed. If there is a parameter error, however, the Target creates an error code and sense data and then advances to item ix.
SCSI Commands The commands supported by EPSON scanners are explained below. If the Link, Flag, and reserved bits of a command are a value other than 0, an error occurs and the command is not executed. 1. Test Unit Ready If the scanner is ready for operation, Good status is sent; if an error occurs at this time, Check Condition status is sent. 2. Request Sense The sense data in the scanner is sent when a request is received. Sense data is 8-byte data in the extension sense data format.
4. Send, Receive Data is sent to and received from the scanner. With this command, the transfer length and assigned length must be the same as the actual number of data bytes. For example, when the ESC G (Start reading) command is to be sent to the scanner, the transfer length must be 2 bytes; otherwise, an error occurs and the command is not executed. If the assigned length is 0, the command is ended.
Sense Data The extension sense data format is used for the sense data created when an error occurs. This format is described below. Bit 7 6 5 4 3 2 1 0 Byte 0 Valid Error class (7) 1 2 Error code (0) Segment data number (0) File mark EOM ILI Reserved 3 Information byte (MSB) 4 Information byte 5 Information byte 6 Information byte (LSB) 7 Additional sense byte (0) Sense keys Following is a description of the individual bits and bytes.
Information byte: This byte has meaning only when the Valid bit is set to 0 and indicates the difference between the transfer length or assigned length specified with a command and the actual data length required by the scanner. The value entered here is calculated using the following formula. Information byte = transfer length - actual data length (assigned length) (The data byte length is 0 when a negative value is specified.
Initialization The scanner is initialized (returned to a fixed set of conditions) in several ways. Hardware initialization ❏ When the power is turned on ❏ When the RESET switch is pressed ❏ When the scanner receives an initializing signal in the interface Software initialization When the software command ESC @ (Initialize the scanner) is received Default settings The default settings vary by model. See Appendix B for a list of default settings for all EPSON scanner models.
A-20 Interface Specifications
Appendix B Scanner Model Technical Data B Scanner Model Technical Data B-1
GT-1000 Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-1000 color image scanner. For further details about this particular scanner model, see the GT-1000 user’s guide.
Software Functions and Settings The function level of the GT-1000 is B2. The table below lists the functions and settings that can be controlled with software commands.
DIP Switch Setting The GT-1000 has one bank of DIP switches on the control panel. The tables below show the function of each switch and the preset factory settings. The shaded boxes show the factory settings. Switch No.
Gamma correction (ESC Z command) Setting SW 5 SW 6 CRT Display A OFF OFF CRT Display B ON OFF Printer Output A OFF ON Printer Output C ON ON Halftoning mode (ESC B command) Setting SW 7 SW 8 Disabled OFF OFF Halftoning mode A ON OFF Halftoning mode B OFF ON Halftoning mode C ON ON Scanner Model Technical Data B-5
The Identity Data-Block The GT-1000 sends the following data-block when it receives the ESC I (Request identity) command.
The Condition Data-Block The GT-1000 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes Data (in hex) Contents Explanation Brightness 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ 24 xx i 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) *(xx denotes a variable) B-8 Gamma correction Scanner Model Technical Data
GT-4000 Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-4000 color image scanner. For further details about this particular scanner model, see the GT-4000 user’s guide.
Software Functions and Settings The function level of the GT-4000 is B3. The table below lists the functions and settings that can be controlled with software commands.
Software Defaults With the DIP switches at the preset factory settings, the following values are the default values on the GT-4000 when the power is turned on.
DIP Switch Setting The GT-4000 has one bank of DIP switches on the control panel. The tables below show the function of each switch and the preset factory settings. The shaded boxes show the factory settings. DIP switch 1 settings Switch No.
Printer type for direct printing Printer type SW 1-7 SW 1-8 EPSON 24-pin color printer OFF OFF Note: No other combination of SW 1-7 and SW 1-8 should be made. Direct printing is available only when the GT-4000 is directly connected to a printer through the parallel interface. This function has no relation to ordinary software controls. See the GT-4000 user’s guide for further details. DIP switch 2 settings Switch No.
Gamma correction (ESC Z command) Setting SW 2-3 SW 2-4 SW 2-5 CRT Display A OFF OFF OFF CRT Display B ON OFF OFF Printer Output A OFF ON OFF Printer Output B ON ON OFF Printer Output C OFF OFF ON Color correction (ESC M command) B-14 Setting SW 2-6 SW 2-7 Impact dot matrix printer OFF OFF Thermal transfer printer ON OFF Ink jet printer OFF ON CRT Display ON ON Scanner Model Technical Data
The Identity Data-Block The GT-4000 sends the following data-block when it receives the ESC I (Request identity) command.
B-16 Order of bytes Data (in hex) Contents Explanation 18 52 ‘‘R’’ 19 78 120 Available resolution (120 dpi) 20 00 21 52 ‘‘R’’ 22 90 144 23 00 24 52 ‘‘R’’ 25 96 150 26 00 27 52 ‘‘R’’ 28 A0 160 29 00 30 52 ‘‘R’’ 31 B4 180 32 00 33 52 ‘‘R’’ 34 C8 200 35 00 36 52 ‘‘R’’ 37 F0 240 38 00 39 52 ‘‘R’’ 40 2C 300 41 01 42 52 ‘‘R’’ 43 40 320 44 01 45 52 ‘‘R’’ 46 68 360 47 01 Scanner Model Technical Data Available resolution (144 dpi)
Order of bytes Data (in hex) Contents Explanation 48 52 ‘‘R’’ 49 90 400 Available resolution (400 dpi) 50 01 51 41 ‘‘A’’ 52 60 3424 53 0D 54 20 55 12 Maximum reading area at the maximum resolution and 100% zoom (main scan 3424 dots by sub scan 4640 dots) 4640 *(xx denotes a variable) The Condition Data-Block The GT-4000 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes Data (in hex) Contents Explanation 9 xx n1 (main scan offset length) 10 xx 11 xx n2 (sub scan offset length) 12 xx 13 xx n3 (main scan read length) 14 xx 15 xx n4 (sub scan read length) 16 xx Data format 17 44 ‘‘D’’ 18 xx i 19 42 ‘‘B’’ 20 xx i 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ 24 xx i Brightness Gamma correction 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) Color correction 28 4D ‘‘M’’ 29 xx i *(xx den
GT-6000 (ES-300C) Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-6000 color image scanner. For further details about this particular scanner model, see the GT-6000 user’s guide. Note for American and Canadian users: The EPSON GT-6000 scanner is sold under the model name ES-300C in the United States and Canada. Therefore all the GT-6000 information in this guide applies to the ES-300C as well.
Software Functions and Settings The function level of the GT-6000 is B3. The table below lists the functions and settings that can be controlled with software commands.
Software Defaults With the DIP switches at the preset factory settings, the following values are the default values on the GT-6000 when the power is turned on.
DIP Switch Setting The GT-6000 has one bank of DIP switches on the control panel. The tables below show the function of each switch and the preset factory settings. The shaded boxes show the factory settings. DIP switch 1 settings Switch No.
Printer type for direct printing Printer type SW 1-7 SW 1-8 EPSON 24-pin color printer (80 col.) OFF OFF HP PaintJet color printer (parallel) ON OFF EPSON 24-pin color printer (136 col.) ON ON Note: To use the direct printing function, SW 2-8 should also be set to ON. No other combination of SW 1-7 and SW 1-8 should be made. Direct printing is available only when the GT-6000 is directly connected to a printer through the parallel interface.
Halftoning mode (ESC B command) Setting SW 2-1 SW 2-2 Disabled OFF OFF Halftoning mode A ON OFF Halftoning mode B OFF ON Halftoning mode C ON ON Gamma correction (ESC Z command) Setting SW 2-3 SW 2-4 SW 2-5 CRT Display A OFF OFF OFF CRT Display B ON OFF OFF Printer Output A OFF ON OFF Printer Output B ON ON OFF Printer Output C OFF OFF ON Color correction (ESC M command) B-24 Setting SW 2-6 SW 2-7 Impact dot matrix printer OFF OFF Thermal transfer printer ON
The Identity Data-Block The GT-6000 sends the following data-block when it receives the ESC I (Request identity) command.
B-26 Order of bytes Data (in hex) Contents Explanation 18 52 ‘‘R’’ 19 64 100 Available resolution (100 dpi) 20 00 21 52 ‘‘R’’ 22 78 120 23 00 24 52 ‘‘R’’ 25 90 144 26 00 27 52 ‘‘R’’ 28 96 150 29 00 30 52 ‘‘R’’ 31 A0 160 32 00 33 52 ‘‘R’’ 34 B4 180 35 00 36 52 ‘‘R’’ 37 C8 200 38 00 39 52 ‘‘R’’ 40 F0 240 41 00 42 52 ‘‘R’’ 43 2C 300 44 01 45 52 ‘‘R’’ 46 40 320 47 01 Scanner Model Technical Data Available resolution (120 dpi)
Order of bytes Data (in hex) Contents Explanation 48 52 ‘‘R’’ 49 68 360 Available resolution (360 dpi) 50 01 51 52 ‘‘R’’ 52 90 400 53 01 54 52 ‘‘R’’ 55 E0 480 56 01 57 52 ‘‘R’’ 58 58 600 59 02 60 41 ‘‘A’’ 61 F0 5104 62 13 63 68 64 1B 7016 Available resolution (400 dpi) Available resolution (480 dpi) Available resolution (600 dpi) Maximum reading area at the maximum resolution and 100% zoom (main scan 5104 dots by sub scan 7016 dots) *(xx denotes a variab
The Condition Data-Block The GT-6000 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes Data (in hex) Contents Explanation Brightness 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ Gamma correction 24 xx i 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) 28 4D ‘‘M’’ Color correction 29 xx i *(xx denotes a variable) Scanner Model Technical Data B-29
GT-6500 (ES-600C) Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-6500 color image scanner. For further details about this particular scanner model, see the GT-6500 user’s guide. Note for American and Canadian users: The EPSON GT-6500 scanner is sold under the model name ES-600C in the United States and Canada. Software information in this guide refers to both the GT-6500 and ES-600C.
Error Indications The error indications are different for the GT-6500 and the ES-600C. Both versions are listed below. GT-6500 Scanner errors are displayed by the digital indicator as shown below. The READY light remains on after a Command Error.
Software Functions and Settings The function level of the GT-6500 is B4. The table below lists the functions and settings that can be controlled with software commands.
Software Defaults With the DIP switches at the preset factory settings, the following values are the default values on the GT-6500 when the power is turned on.
DIP Switch Setting The DIP switch settings are different for the GT-6500 and ES-600C. Both versions are listed below. GT-6500 The GT-6500 has two banks of DIP switches on the front of the scanner. The tables below show the function of each switch and the preset factory settings. The shaded boxes show the factory settings. DIP switch 1 settings Switch No.
Baud rate settings Setting SW 1-1 SW 1-2 SW 1-3 19200 bps OFF OFF OFF 9600 bps ON OFF OFF 4800 bps OFF ON OFF 2400 bps ON ON OFF 1200 bps OFF OFF ON 600 bps ON OFF ON 300 bps OFF ON ON Printer type for direct printing Printer type SW 1-7 SW 1-8 EPSON 24-pin color printer (80 col.) OFF OFF EPSON Stylus Color ON OFF EPSON 24-pin color printer (136 col.) ON ON Note: To use the direct printing function, SW 2-8 should also be set to ON.
DIP switch 2 settings Switch No.
ES-600C The ES-600C has one bank of DIP switches on the front of the scanner. The table below shows the function of each switch and the preset factory settings. The shaded boxes show the factory settings. DIP switch 1 settings Switch No.
The Identity Data-Block The GT-6500 sends the following data-block when it receives the ESC I (Request identity) command.
Order of bytes Data (in hex) Contents Explanation 18 52 ‘‘R’’ 19 5A 90 Available resolution (90 dpi) 20 00 21 52 ‘‘R’’ 22 64 100 23 00 24 52 ‘‘R’’ 25 78 120 26 00 27 52 ‘‘R’’ 28 85 133 29 00 30 52 ‘‘R’’ 31 90 144 32 00 33 52 ‘‘R’’ 34 96 150 35 00 36 52 ‘‘R’’ 37 A0 160 38 00 39 52 ‘‘R’’ 40 AF 175 41 00 42 52 ‘‘R’’ 43 B4 180 44 00 45 52 ‘‘R’’ 46 C8 200 47 00 Available resolution (100 dpi) Available resolution (120 dpi) Avai
Order of bytes Data (in hex) Contents Explanation 48 52 ‘‘R’’ 49 D8 216 Available resolution (216 dpi) 50 00 51 52 ‘‘R’’ 52 F0 240 53 00 54 52 ‘‘R’’ 55 2C 300 56 01 57 52 ‘‘R’’ 58 40 320 59 01 60 52 ‘‘R’’ 61 68 360 62 01 63 52 ‘‘R’’ 64 90 400 65 01 66 52 ‘‘R’’ 67 E0 480 68 01 69 52 ‘‘R’’ 70 58 600 71 02 72 41 ‘‘A’’ 73 EC 5100 74 13 75 6C 76 1B 7020 *(xx denotes a variable) B-40 Scanner Model Technical Data Available resolut
The Condition Data-Block The GT-6500 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes Data (in hex) Contents Explanation Brightness 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ 24 xx i 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) 28 4D ‘‘M’’ Color correction 29 xx i 30 51 ‘‘Q’’ 31 xx i 32 67 ‘‘g’’ 33 xx i *(xx denotes a variable) B-42 Gamma correction Scanner Model Technical Data Sharpness Scanning mode
GT-8000 (ES-800C) Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-8000 color image scanner. For further details about this particular scanner model, see the GT-8000 user’s guide. Note for American and Canadian users: The EPSON GT-8000 scanner is sold under the model name ES-800C in the United States and Canada. Therefore all the GT-8000 information in this guide applies to the ES-800C as well.
Software Functions and Settings The function level of the GT-8000 is B4. The table below lists the functions and settings that can be controlled with software commands.
Software Defaults The following values are the default values on the GT-8000 when the power is turned on.
The Identity Data-Block The GT-8000 sends the following data-block when it receives the ESC I (Request identity) command.
Order of bytes Data (in hex) Contents Explanation 21 52 ‘‘R’’ 22 64 100 Available resolution (100 dpi) 23 00 24 52 ‘‘R’’ 25 78 120 26 00 27 52 ‘‘R’’ 28 85 133 29 00 30 52 ‘‘R’’ 31 90 144 32 00 33 52 ‘‘R’’ 34 96 150 35 00 36 52 ‘‘R’’ 37 A0 160 38 00 39 52 ‘‘R’’ 40 AF 175 41 00 42 52 ‘‘R’’ 43 B4 180 44 00 45 52 ‘‘R’’ 46 C8 200 47 00 48 52 ‘‘R’’ 49 D8 216 50 00 Available resolution (120 dpi) Available resolution (133 dpi) Av
Order of bytes Data (in hex) Contents Explanation 51 52 ‘‘R’’ 52 F0 240 Available resolution (240 dpi) 53 00 54 52 ‘‘R’’ 55 2C 300 56 01 57 52 ‘‘R’’ 58 40 320 59 01 60 52 ‘‘R’’ 61 68 360 62 01 63 52 ‘‘R’’ 64 90 400 65 01 66 52 ‘‘R’’ 67 E0 480 68 01 69 52 ‘‘R’’ 70 58 600 71 02 72 52 ‘‘R’’ 73 20 800 74 03 75 41 ‘‘A’’ 76 90 6800 77 1A 78 90 79 24 9360 *(xx denotes a variable) B-48 Scanner Model Technical Data Available resolut
The Condition Data-Block The GT-8000 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes Data (in hex) Contents Explanation Brightness 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ 24 xx i 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) 28 4D ‘‘M’’ Color correction 29 xx i 30 51 ‘‘Q’’ 31 xx i 32 67 ‘‘g’’ 33 xx i *(xx denotes a variable) B-50 Gamma correction Scanner Model Technical Data Sharpness Scanning mode
GT-8500 (ES-1000C) Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-8500 color image scanner. For further details about this particular scanner model, see the GT-8500 user’s guide. Note for American and Canadian users: The EPSON GT-8500 scanner is sold under the model name ES-1000C in the United States and Canada. Therefore all the GT-8500 information in this guide applies to the ES-1000C as well.
Software Functions and Settings The function level of the GT-8500 is B5. The table below lists the functions and settings that can be controlled with software commands.
Software Defaults The following values are the default values on the GT-8500 when the power is turned on.
The Identity Data-Block The GT-8500 sends the following data-block when it receives the ESC I (Request identity) command.
Order of bytes Data (in hex) Contents Explanation 21 52 ‘‘R’’ 22 64 100 Available resolution (100 dpi) 23 00 24 52 ‘‘R’’ 25 78 120 26 00 27 52 ‘‘R’’ 28 85 133 29 00 30 52 ‘‘R’’ 31 90 144 32 00 33 52 ‘‘R’’ 34 96 150 35 00 36 52 ‘‘R’’ 37 A0 160 38 00 39 52 ‘‘R’’ 40 AF 175 41 00 42 52 ‘‘R’’ 43 B4 180 44 00 45 52 ‘‘R’’ 46 C8 200 47 00 48 52 ‘‘R’’ 49 D8 216 50 00 Available resolution (120 dpi) Available resolution (133 dpi) Av
B-56 Order of bytes Data (in hex) Contents Explanation 51 52 ‘‘R’’ 52 F0 240 Available resolution (240 dpi) 53 00 54 52 ‘‘R’’ 55 2C 300 56 01 57 52 ‘‘R’’ 58 40 320 59 01 60 52 ‘‘R’’ 61 68 360 62 01 63 52 ‘‘R’’ 64 90 400 65 01 66 52 ‘‘R’’ 67 E0 480 68 01 69 52 ‘‘R’’ 70 58 600 71 02 72 52 ‘‘R’’ 73 20 800 74 03 75 52 ‘‘R’’ 76 84 900 77 03 78 52 ‘‘R’’ 79 B0 1200 80 04 Scanner Model Technical Data Available resolution (300 dpi
Order of bytes Data (in hex) Contents Explanation 81 52 ‘‘R’’ 82 40 1600 Available resolution (1600 dpi) 83 06 84 41 ‘‘A’’ 85 20 13600 86 35 87 20 88 49 Maximum reading area at the maximum resolution and 100% zoom (main scan 13600 dots by sub scan 18720 dots) 18720 *(xx denotes a variable) The Condition Data-Block The GT-8500 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes B-58 Data (in hex) Contents Explanation Reading area 8 41 ‘‘A’’ 9 xx n1 10 xx 11 xx 12 xx 13 xx 14 xx 15 xx 16 xx 17 44 ‘‘D’’ 18 xx i n2 (main scan offset length) (sub scan offset length) n3 (main scan read length) n4 (sub scan read length) 19 42 ‘‘B’’ 20 xx i 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ Data format Halftoning mode Brightness Gamma correction 24 xx i 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) 28
Order of bytes Data (in hex) Contents Explanation 34 4B ‘‘K’’ Data order 35 xx i *(xx denotes a variable) Scanner Model Technical Data B-59
GT-9000 (ES-1200C) Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-9000 color image scanner. For further details about this particular scanner model, see the GT-9000 user’s guide. Note for American and Canadian users: The EPSON GT-9000 scanner is sold under the model name ES-1200C in the United States and Canada. Therefore all the GT-9000 information in this guide applies to the ES-1200C as well.
Software Functions and Settings The function level of the GT-9000 is B4. The table below shows the list of the functions and settings that can be controlled with software commands.
Software Defaults The following are the default values of the GT-9000 at power on.
The Identity Data-Block The GT-9000 sends the following data-block when it receives the ESC I (Request identity) command.
B-64 Order of bytes Data (in hex) Contents Explanation 21 52 ‘‘R’’ 22 64 100 Available resolution (100 dpi) 23 00 24 52 ‘‘R’’ 25 78 120 26 00 27 52 ‘‘R’’ 28 85 133 29 00 30 52 ‘‘R’’ 31 90 144 32 00 33 52 ‘‘R’’ 34 96 150 35 00 36 52 ‘‘R’’ 37 A0 160 38 00 39 52 ‘‘R’’ 40 AF 175 41 00 42 52 ‘‘R’’ 43 B4 180 44 00 45 52 ‘‘R’’ 46 C8 200 47 00 48 52 ‘‘R’’ 49 D8 216 50 00 Scanner Model Technical Data Available resolution (120 dpi)
Order of bytes Data (in hex) Contents Explanation 51 52 ‘‘R’’ 52 F0 240 Available resolution (240 dpi) 53 00 54 52 ‘‘R’’ 55 2C 300 56 01 57 52 ‘‘R’’ 58 40 320 59 01 60 52 ‘‘R’’ 61 68 360 62 01 63 52 ‘‘R’’ 64 90 400 65 01 66 52 ‘‘R’’ 67 E0 480 68 01 69 52 ‘‘R’’ 70 58 600 71 02 72 52 ‘‘R’’ 73 20 800 74 03 75 52 ‘‘R’’ 76 84 900 77 03 78 52 ‘‘R’’ 79 B0 1200 80 04 Available resolution (300 dpi) Available resolution (320 dpi) A
Order of bytes Data (in hex) Contents Explanation 81 52 ‘‘R’’ 82 40 1600 Available resolution (1600 dpi) 83 06 84 52 ‘‘R’’ 85 08 1800 86 07 87 52 ‘‘R’’ 88 60 2400 89 09 90 41 ’’A’’ 91 B0 20400 92 4F 93 B0 94 6D 28080 *(xx denotes a variable) B-66 Scanner Model Technical Data Available resolution (1800 dpi) Available resolution (2400 dpi) Maximum reading area at the maximum resolution and 100% zoom (main scan 20400 dots by sub scan 28080 dots)
The Condition Data-Block The GT-9000 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes Data (in hex) Contents Explanation Brightness 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ 24 xx i 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) 28 4D ‘‘M’’ Color correction 29 xx i 30 51 ‘‘Q’’ 31 xx i 32 67 ‘‘g’’ 33 xx i *(xx denotes a variable) B-68 Gamma correction Scanner Model Technical Data Sharpness Scanning mode
GT-5000 (Action Scanner II) Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-5000 color image scanner. For further details about this particular scanner model, see the GT-5000 user’s guide. Note for American and Canadian users: The EPSON GT-5000 scanner is sold under the model name Action Scanner II in the United States and Canada. Therefore all the GT-5000 information in this guide applies to the Action Scanner II as well.
Software Functions and Settings The function level of the GT-5000 is B5. The table below lists the functions and settings that can be controlled with software commands.
Software Defaults The following are the default values of the GT-5000 at power on.
The Identity Data-Block The GT-5000 sends the following data-block when it receives the ESC I (Request identity) command.
Order of bytes Data (in hex) Contents Explanation 21 52 ‘‘R’’ 22 64 100 Available resolution (100 dpi) 23 00 24 52 ‘‘R’’ 25 78 120 26 00 27 52 ‘‘R’’ 28 85 133 29 00 30 52 ‘‘R’’ 31 90 144 32 00 33 52 ‘‘R’’ 34 96 150 35 00 36 52 ‘‘R’’ 37 A0 160 38 00 39 52 ‘‘R’’ 40 AF 175 41 00 42 52 ‘‘R’’ 43 B4 180 44 00 45 52 ‘‘R’’ 46 C8 200 47 00 48 52 ‘‘R’’ 49 D8 216 50 00 Available resolution (120 dpi) Available resolution (133 dpi) Av
B-74 Order of bytes Data (in hex) Contents Explanation 51 52 ‘‘R’’ 52 F0 240 Available resolution (240 dpi) 53 00 54 52 ‘‘R’’ 55 2C 300 56 01 57 52 ‘‘R’’ 58 40 320 59 01 60 52 ‘‘R’’ 61 68 360 62 01 63 52 ‘‘R’’ 64 90 400 65 01 66 52 ‘‘R’’ 67 E0 480 68 01 69 52 ‘‘R’’ 70 58 600 71 02 72 52 ‘‘R’’ 73 D0 720 74 02 75 52 ‘‘R’’ 76 20 800 77 03 78 52 ‘‘R’’ 79 84 900 80 03 Scanner Model Technical Data Available resolution (300 dpi)
Order of bytes Data (in hex) Contents Explanation 81 52 ‘‘R’’ 82 B0 1200 Available resolution (1200 dpi) 83 04 84 41 ‘‘A’’ 85 D8 10200 86 27 87 98 88 3A Maximum reading area at the maximum resolution and 100% zoom (main scan 10200 dots by sub scan 14040 dots) 14040 *(xx denotes a variable) The Condition Data-Block The GT-5000 sends the following data-block when it receives the ESC S (Request condition) command.
Order of bytes B-76 Data (in hex) Contents Explanation Reading area 8 41 ‘‘A’’ 9 xx n1 10 xx 11 xx 12 xx 13 xx 14 xx 15 xx 16 xx 17 44 ‘‘D’’ 18 xx i n2 (main scan offset length) (sub scan offset length) n3 (main scan read length) n4 (sub scan read length) 19 42 ‘‘B’’ 20 xx i 21 4C ‘‘L’’ 22 xx i 23 5A ‘‘Z’’ Data format Halftoning mode Brightness Gamma correction 24 xx i 25 48 ‘‘H’’ Zoom 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) 28
Order of bytes Data (in hex) Contents Explanation 34 4B ‘‘K’’ Data order 35 xx i *(xx denotes a variable) Scanner Model Technical Data B-77
GT-300 (ES-300GS) Technical Data This appendix provides technical information that is relevant to software control of the EPSON GT-300 document scanner. For further details about this particular scanner model, see the GT-300 user’s guide. Note for American and Canadian users: The EPSON GT-300 scanner is sold under the model name ES-300GS in the United States and Canada. Therefore all the GT-300 information in this guide applies to the ES-300GS as well.
Software Functions and Settings The function level of the GT-300 is A5. The table below lists the functions and settings that can be controlled with software commands.
Software Defaults The following values are the default values on the GT-300 when the power is turned on.
The Identity Data-Block The GT-300 sends the following data-block when it receives the ESC I (Request identity) command.
B-82 Order of bytes Data (in hex) Contents Explanation 21 52 ‘‘R’’ 22 64 100 Available resolution (100 dpi) 23 00 24 52 ‘‘R’’ 25 78 120 26 00 27 52 ‘‘R’’ 28 85 133 29 00 30 52 ‘‘R’’ 31 90 144 32 00 33 52 ‘‘R’’ 34 96 150 35 00 36 52 ‘‘R’’ 37 A0 160 38 00 39 52 ‘‘R’’ 40 AF 175 41 00 42 52 ‘‘R’’ 43 B4 180 44 00 45 52 ‘‘R’’ 46 C8 200 47 00 48 52 ‘‘R’’ 49 D8 216 50 00 Scanner Model Technical Data Available resolution (120 dpi)
Order of bytes Data (in hex) Contents Explanation 51 52 ‘‘R’’ 52 F0 240 Available resolution (240 dpi) 53 00 54 52 ‘‘R’’ 55 2C 300 56 01 57 52 ‘‘R’’ 58 40 320 59 01 60 52 ‘‘R’’ 61 68 360 62 01 63 52 ‘‘R’’ 64 90 400 65 01 66 52 ‘‘R’’ 67 E0 480 68 01 69 52 ‘‘R’’ 70 58 600 71 02 72 41 ‘‘A’’ 73 EC 5100 77 13 75 D0 76 20 8400 Available resolution (300 dpi) Available resolution (320 dpi) Available resolution (360 dpi) Available resolutio
Condition Data-Block Order of bytes Data (in hex) Contents Explanation (Information block) 1 02 STX code Header: indicates the beginning of the data-block 2 xx* Status Status byte: indicates the status of the scanner 3 23 35 Bytes 4 00 Byte counter: indicates the number of bytes of data Color mode (Data) B-84 1 43 ‘‘C’’ 2 xx 0 3 52 ‘‘R’’ Resolution 4 xx n1 (main scan resolution) 5 xx 6 xx n2 (sub scan resolution) 7 xx Reading area 8 41 ‘‘A’’ 9 xx n1 10 xx 1
Order of bytes Data (in hex) Contents Explanation 26 xx i1 (main scan zoom) 27 xx 12 (sub scan zoom) 30 51 ‘‘Q’’ Sharpness 31 xx i 32 67 ‘‘g’’ 33 xx i 34 4B ‘‘K’’ 35 xx i 36 73 ‘‘s’’ 37 xx i Scanning mode Data order Auto area segmentation *(xx denotes a variable) Scanner Model Technical Data B-85
B-86 Scanner Model Technical Data
