Epson GT-300, GT-1000, GT-6000, ES-300GS, GT-8500 User Manual

...

EPSON® ESC/ITM Scanner

GT-1000 GT-4000 GT-6000 ES-300C GT-6500 ES-600C GT-8000 ES-800C GT-8500 ES-1000C GT-9000 ES-1200C GT-5000 Action Scanner II GT-300 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. Neither is any liability assumed for damages resulting from the use of the information contained herein.

Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options other than those designated as Original Epson Products by Seiko Epson Corporation.

EPSON is a registered trademark of Seiko Epson Corporation. EPSON ESC/I is a trademark of Seiko Epson Corporation. HP PaintJet is a trademark of Hewlett-Packard Company. Apple and Macintosh are trademarks of Apple Computer, Inc.

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.

iii

Contents

Introduction

Manual Construction . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Command Usage . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Command Reference . . . . . . . . . . . . . . . . . . . . . . . 1-2

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

To understand EPSON scanners . . . . . . . . . . . . . . . . . 1-3

To write a scanner control program . . . . . . . . . . . . . . . 1-3

Chapter 1 Overview

What Is a Scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Basic scanning principles . . . . . . . . . . . . . . . . . . . . 1-2

Reading color . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Reading monochrome . . . . . . . . . . . . . . . . . . . . . . 1-4

EPSON Scanner Features . . . . . . . . . . . . . . . . . . . . . . . 1-5

Control Code Construction . . . . . . . . . . . . . . . . . . . . . . 1-7

Function level . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Computers and Handshaking . . . . . . . . . . . . . . . . . . . . . 1-8

Image Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Image data format . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Line data transfer . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Block data transfer . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Image definition . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Gamma correction . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Data form definition . . . . . . . . . . . . . . . . . . . . . . . 1-16

Image processing . . . . . . . . . . . . . . . . . . . . . . . . 1-21

Using Scanner Features . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Scanning multiple shade documents for

output on devices capable of expressing

multiple shades. . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Scanning multiple shade documents for

bi-level output devices capable of black

and white only . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Scanning documents without multiple

shades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Scanning documents to obtain unprocessed

data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Chapter 2 Command Usage

Execution Commands . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

1. Start scanning (ESC G) . . . . . . . . . . . . . . . . . . . . . 2-2

2. Request ID (ESC I) . . . . . . . . . . . . . . . . . . . . . . . 2-3

3. Request Status (ESC F) . . . . . . . . . . . . . . . . . . . . 2-3

4. Extended Status Request (ESC f) . . . . . . . . . . . . . . . 2-3

5. Request condition (ESC S) . . . . . . . . . . . . . . . . . . . 2-4

Data Form Commands . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

1. Set Color Mode (ESC C) . . . . . . . . . . . . . . . . . . . . 2-5

2. Set Data Format (ESC D) . . . . . . . . . . . . . . . . . . . 2-5

3. Set Resolution (ESC R) . . . . . . . . . . . . . . . . . . . . 2-7

4. Set zoom (ESC H) . . . . . . . . . . . . . . . . . . . . . . . 2-7

5. Set scanning area (ESC A) . . . . . . . . . . . . . . . . . . . 2-8

6. Set data order (ESC K) . . . . . . . . . . . . . . . . . . . . . 2-8

Image Setting Commands . . . . . . . . . . . . . . . . . . . . . . . 2-9

1. Set brightness (ESC L) . . . . . . . . . . . . . . . . . . . . . 2-9

2. Set gamma correction (ESC Z) . . . . . . . . . . . . . . . . . 2-10

3. Download gamma table (ESC z) . . . . . . . . . . . . . . . . 2-12

Image Processing Commands . . . . . . . . . . . . . . . . . . . . . 2-13

1. Set halftoning mode (ESC B) . . . . . . . . . . . . . . . . . 2-13

2. Download dither pattern (ESC b) . . . . . . . . . . . . . . . 2-15

3. Set color correction (ESC M) . . . . . . . . . . . . . . . . . 2-16

4. Download color correction (ESC m) . . . . . . . . . . . . . . 2-17

Auxiliary Commands . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

1. Initialize the scanner (ESC @) . . . . . . . . . . . . . . . . 2-18

2. Set the scanning mode (ESC g) . . . . . . . . . . . . . . . . 2-18

3. Set the line counter (ESC d) . . . . . . . . . . . . . . . . . 2-19

4. Control option (ESC e) . . . . . . . . . . . . . . . . . . . . 2-20

5. Eject (FF) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Control Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

1. Header (STX) . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

2. Abort scanning (CAN) . . . . . . . . . . . . . . . . . . . . 2-21

3. Normal response (ACK) . . . . . . . . . . . . . . . . . . . 2-21

4. Negative response (NAK) . . . . . . . . . . . . . . . . . . . 2-21

Command Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

ID information . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Control flow . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Recommended command order . . . . . . . . . . . . . . . . . 2-24

Using commands when options are

installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Data Block Transfer Order . . . . . . . . . . . . . . . . . . . . . . 2-26

Data block structure . . . . . . . . . . . . . . . . . . . . . . . 2-26

Information block . . . . . . . . . . . . . . . . . . . . . . . . 2-27

Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30

Transfer order . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32

Scanning Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35

Resolution, zoom, and maximum scannable

area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36

Setting the scanning area . . . . . . . . . . . . . . . . . . . . 2-38

Image trimming (1) . . . . . . . . . . . . . . . . . . . . . . . 2-40

Image trimming (2) . . . . . . . . . . . . . . . . . . . . . . . 2-42

Error Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44

Command error . . . . . . . . . . . . . . . . . . . . . . . . . 2-44

Communications error . . . . . . . . . . . . . . . . . . . . . . 2-44

System error . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45

Option error . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46

Function Level and Commands . . . . . . . . . . . . . . . . . . . . 2-47

Using the function level . . . . . . . . . . . . . . . . . . . . . 2-47

Commands and function level table . . . . . . . . . . . . . . . 2-48

Items not affected by function level . . . . . . . . . . . . . . . 2-50

Typical Programming Errors and Solutions . . . . . . . . . . . . . 2-51

vii

Chapter 3 Command Reference

Summary of the Scanner Commands . . . . . . . . . . . . . . . . . . 3-2

Format of the Command Reference . . . . . . . . . . . . . . . . . . 3-4

Execution Commands . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Data Form Definition Commands . . . . . . . . . . . . . . . . . . . 3-18

Image Definition Commands . . . . . . . . . . . . . . . . . . . . . . 3-36

Image Processing Commands . . . . . . . . . . . . . . . . . . . . . 3-45

Auxiliary Commands . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57

Control Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-65

Appendix A Interface Specifications

Serial Interface Specifications . . . . . . . . . . . . . . . . . . . . . A-2

Signal pin assignments . . . . . . . . . . . . . . . . . . . . . . A-3

Cable wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Parallel Interface Specifications . . . . . . . . . . . . . . . . . . . . A-4

Signal pin assignments . . . . . . . . . . . . . . . . . . . . . . A-5

Timing charts . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

SCSI Interface Specifications . . . . . . . . . . . . . . . . . . . . . A-8

Basic Specification . . . . . . . . . . . . . . . . . . . . . . . . A-8

SCSI Operation Procedure . . . . . . . . . . . . . . . . . . . . . . . A-13

Communication Operation . . . . . . . . . . . . . . . . . . . . A-13

SCSI Commands . . . . . . . . . . . . . . . . . . . . . . . . . A-15

Unit Attention Condition . . . . . . . . . . . . . . . . . . . . . A-16

Sense Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17

Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-19

Default settings . . . . . . . . . . . . . . . . . . . . . . . . . . A-19

viii

Appendix B Scanner Model Technical Data

GT-1000 Technical Data . . . . . . . . . . . . . . . . . . . . . . . B-2

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . B-2

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Software Functions and Settings . . . . . . . . . . . . . . . . B-3

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . B-3

DIP Switch Setting . . . . . . . . . . . . . . . . . . . . . . . . B-4

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-6

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-7

GT-4000 Technical Data . . . . . . . . . . . . . . . . . . . . . . . B-9

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . B-9

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-9

Software Functions and Settings . . . . . . . . . . . . . . . . B-10

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . B-11

DIP Switch Setting . . . . . . . . . . . . . . . . . . . . . . . . B-12

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-15

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-17

GT-6000 (ES-300C) Technical Data . . . . . . . . . . . . . . . . . B-19

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . B-19

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-19

Software Functions and Settings . . . . . . . . . . . . . . . . B-20

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . B-21

DIP Switch Setting . . . . . . . . . . . . . . . . . . . . . . . . B-22

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-25

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-28

GT-6500 (ES-600C) Technical Data . . . . . . . . . . . . . . . . . B-30

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . B-30

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-31

Software Functions and Settings . . . . . . . . . . . . . . . . B-32

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . B-33

DIP Switch Setting . . . . . . . . . . . . . . . . . . . . . . . . B-34

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-38

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-41

GT-8000 (ES-800C) Technical Data . . . . . . . . . . . . . . . . . . B-43

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . B-43

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-43

Software Functions and Settings . . . . . . . . . . . . . . . . . B-44

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . . B-45

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-46

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-49

GT-8500 (ES-1000C) Technical Data . . . . . . . . . . . . . . . . . B-51

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . B-51

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-51

Software Functions and Settings . . . . . . . . . . . . . . . . . B-52

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . . B-53

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-54

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-57

GT-9000 (ES-1200C) Technical Data . . . . . . . . . . . . . . . . . B-60

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . B-60

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-60

Software Functions and Settings . . . . . . . . . . . . . . . . . B-61

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . . B-62

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-63

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-67

GT-5000 (Action Scanner II) Technical Data . . . . . . . . . . . . . B-69

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . B-69

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-69

Software Functions and Settings . . . . . . . . . . . . . . . . . B-70

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . . B-71

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-72

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-75

GT-300 (ES-300GS) Technical Data . . . . . . . . . . . . . . . . . . B-78

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . B-78

Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . B-78

Software Functions and Settings . . . . . . . . . . . . . . . . . B-79

Software Defaults . . . . . . . . . . . . . . . . . . . . . . . . . B-80

The Identity Data-Block . . . . . . . . . . . . . . . . . . . . . B-81

The Condition Data-Block . . . . . . . . . . . . . . . . . . . . B-84

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. This section also provides information on image data transfer, the scanning environment, and error handling.

Command Reference

Lists each ESC/I command and its parameters in detail.

Appendix

Offers additional information necessary for writing scanner programs. This includes the specifications for each type of interface, command support levels, and available scanner options.

2 Introduction

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.

Also, several examples of common programming errors and information on resolving these errors are included.

Introduction 3

4 Introduction

Chapter 1

Overview

This chapter provides a brief description of scanner operations and concepts. The special features of EPSON brand scanners are also outlined in this chapter.

Overview 1-1

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. The sensor is composed of CCD element arrays that detect the brightness of the reflected light and produce corresponding digital signals.

The document is read by a horizontal row of sensors that move vertically down the page. Data from the sensors is read at regular intervals (such as 300 times per inch), achieving very high resolutions.

Data is organized horizontally and vertically; the scanning direction is referred to by the following terms:

1-2 Overview

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.

Overview 1-3

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:

❏ Treat all the data on the page as the same color. This method uses

all the light sources, and is fine if you plan to print data in black and white only.

❏ Specify one color (R, G, or B) as a dropout color. This method

uses only one light source and reads all data except for the color specified.

1-4 Overview

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.

❏ Internal image data processing circuits

Each scanner contains circuitry capable of processing image data before it is sent to the computer; the type of processing is specified by control codes. By preprocessing image data, the computer can process data faster with a reduction in image distortion.

❏ Support of various interfaces

GT-1000: RS-232C Serial, Bi-directional Parallel GT-4000: RS-232C Serial, Bi-directional Parallel,

SCSI (option)

GT-6000: RS-232C Serial, Bi-directional Parallel,

SCSI (option) GT-8000: Bi-directional Parallel, SCSI GT-6500: RS-232C Serial, Bi-directional Parallel, SCSI GT-8500: Bi-directional Parallel, SCSI GT-9000: Bi-directional Parallel, SCSI GT-300: Bi-directional Parallel, SCSI GT-5000: Bi-directional Parallel, SCSI ES-300C: RS-232C Serial, Bi-directional Parallel,

SCSI (option) ES-600C: Bi-directional Parallel, SCSI ES-800C: Bi-directional Parallel, SCSI ES-1000C: Bi-directional Parallel, SCSI ES-1200C: Bi-directional Parallel, SCSI ES-300GS: Bi-directional Parallel, SCSI Action Scanner II Bi-directional Parallel, SCSI

Overview 1-5

❏ 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.

❏ Optional transparency illumination unit

This unit can read transparencies (film) when mounted on the GT-8000 (ES-800C), GT-6500 (ES-600C), GT-8500 (ES-1000C), or GT-9000 (ES-1200C) models. You can now scan film directly, without having to first make a print of the film as was necessary in the past. This allows for more accurate reading of film colors with a minimum of degradation in image resolution. You can also now directly read documents stored on film.

1-6 Overview

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.

However, some scanner settings are unique to particular scanner models, so you must take these into account when writing scanner programs.

Parameters

Some commands require additional parameters. Commands that require parameters do not take effect until the parameters are sent, so always make sure you send the correct parameters. Sending an incorrect parameter may cause a scanner error.

Overview 1-7

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. This interaction method is the basis for governing scanner operation.

EPSON scanner and computer interaction is controlled by a method called handshaking. After the computer sends data to the scanner, it must wait for the proper reply from the scanner before sending more data. Also, when the scanner sends data to the computer, it must wait for the correct response from the computer before sending additional data. Handshaking dictates the method of sending data and how the data is acknowledged by both the computer and scanner.

1-8 Overview

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). This is called bi-level conversion, and produces bilevel data.

However, most images contain a nearly infinite number of color shades. By increasing the number of data bits per pixel, you can increase the possible number of pixel shades you can represent. As you can see from the following illustration, 1 bit per pixel allows you to show only two shades; 2 bits per pixel allows you to represent up to 4 shades.

The image data format is what determines the amount of data necessary for each pixel. The amount of data determines how many shades you can express. Normally, you can select from 1 to 8 bits per pixel. For monochrome scanning, this data determines the shade of gray. For color scanning, you can differentiate the same number of shades for each of three colors (green, red, and blue).

Overview 1-9

As you increase the amount of data, you dramatically increase the number of minute differences in color you can represent.

Bits per pixel Monochrome shades Colors

1 bit/color/pixel 2 8 2 bits/color/pixel 4 64 3 bits/color/pixel 8 512 4 bits/color/pixel 16 4,096 5 bits/color/pixel 32 32,768 6 bits/color/pixel 64 262,144 7 bits/color/pixel 128 2,097,152 8 bits/color/pixel 256 16,777,216

1-10 Overview

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.

Overview 1-11

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.

1-12 Overview

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. Setting the brightness to a brighter setting results in a bright image in which some thinner lines may be washed out. On the other hand, setting brightness to a darker setting results in a blacker image in which some intricate details may turn out completely black.

Dark Bright

Overview 1-13

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.

Display A Display B

Printer A Printer B Printer C

1-14 Overview

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.

Overview 1-15

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.

Also, if your printer or CRT is not capable of expressing these differences in color and shade, there is no reason to produce such precise (and sizable data).

8 bit 2 bit 1 bit

1-16 Overview

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. For example, doubling the resolution in both the horizontal and vertical directions results in four times the amount of data.

Each output device also has its own specific resolution. If you scan an image at the same resolution as your output device, the final image will be the same size as the original. Likewise, if you scan an image at double the resolution of your output device, the final image will be twice the size of the original.

Note: Some software may adjust images that include resolution information so they appear as their actual size.

Overview 1-17

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.

1-18 Overview

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.

Since you set these values as the number of pixels, using the zoom function or changing the resolution affects the physical size of the scanning area.

Overview 1-19

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.

If you select color scanning, you can choose page scanning, line scanning, or byte scanning. Page scanning scans the entire page three times; once for each color. Line scanning scans all three colors line by line. Byte scanning scans byte by byte.

1-20 Overview

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.

For example, by adjusting black and white pixels slightly, you can approximate various shades of gray between black and white. This type of data processing is called halftone processing, and several versions are available on EPSON scanners. Two typical forms of halftone processing are dither processing and density pattern processing. Dither processing is the normal type of data processing found on scanners. EPSON scanners also represent halftones using dither processing.

Halftone mode A Halftone mode B

Overview 1-21

Halftone mode C None

Dither mode A Dither mode B

Dither mode C Dither mode D

1-22 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. This section describes which features are available for which types of documents, as well as which features are available with which types of output devices.

Scanning multiple shade documents for output on devices capable of expressing multiple shades.

When you scan multiple shade documents (such as photographs or pictures) and output them to devices capable of expressing multiple shades (such as full-color computers or color film recorders), use the following feature settings for best results.

Data format 3 to 8 bits/pixel/color Image correction Method appropriate to output device Data processing No

Overview 1-23

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., turn all data and image processing off and scan the document. This allows you to achieve the maximum contrast possible.

Data format 1 bit/pixel/color Image correction Standard settings Data processing No

Scanning documents to obtain unprocessed data

If you want to perform all data processing using your application software, with no processing by the scanner, use the following feature settings for best results.

Color setting Page scanning Data format 8 bits/pixel/color Image correction Standard settings Brightness One step darker than standard

1-24 Overview

Chapter 2

Command Usage

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.

After the computer receives a complete data block, it should send an ACK code to the scanner to confirm receipt.

When the scanner receives the ACK code, it begins sending the next data block.

This process is repeated over and over to continue sending data. However, the computer should not send an ACK code after the final data block.

To determine the final data block, refer to the status information block at the beginning of each data block. See page 2-28 for details on the status information block.

ESC G and other commands

The ESC G command begins scanning based on the current scanner settings. Make sure you use the other commands to make your desired settings before sending the ESC G command.

2-2 Command Usage

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.

The ID information is transferred as a data block from the scanner to the computer. See Appendix B for details on the ID information for each scanner model.

3. Request Status (ESC F)

When the scanner receives the ESC F command, it sends a data block to the computer that includes the status information. See page 2-28 for details on status information. The length of the information block within the data block is four bytes. The contents of these four bytes are as follows:

Header (STX) 1 byte Status 1 byte Byte counter 2 bytes

4. Extended Status Request (ESC f)

Upon receiving this command, the scanner sends a data block to the computer that includes the status of the scanner and any options installed.

The data block is composed of the normal information block combined with 33 bytes of extended status data.

Command Usage 2-3

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. Two-byte data is listed with the lower byte first and the upper byte last.

2-4 Command Usage

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. Byte scanning scans on a byte-by-byte basis.

If you select monochrome scanning, you can specify red, green, or blue to be a dropout color.

ESC C and other commands

Selecting line scanning or byte scanning enables the use of the Color Correction Command (ESC M).

2. Set Data Format (ESC D)

This command sets the number of bits available for representing each color (green, red, and blue during color scanning). The number of bits determines the number of shades that can be represented for each color; the more bits, the more colors available. However, increasing the number of shades available also increases the overall data required to represent an image.

Command Usage 2-5

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.

Setting the data format to 2 bits/color/pixel disables halftoning modes B and C on the GT-1000, GT-4000, GT-6000, GT-6500, ES-300C, and ES-600C. (You can select halftoning modes B and C, but mode A processing takes place instead.) Selecting a data format of 3 bits/color/pixel disables all halftoning modes on all scanner models.

2-6 Command Usage

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. You can check the resolutions available on the currently connected scanner by checking the data block returned by the scanner when you send the ID Request command. For B5- and A5-level scanners, you can select a resolution from 50 dpi to the maximum available resolution of the scanner in 1-dpi increments. Trying to select a resolution that is not available results in a command error.

This command determines the number of pixels that can be scanned within the scanning area, based on the current zoom setting. Because of this, you should always set the zoom and resolution before setting the scanning area.

Even if your desired resolution is not available on the current scanner, you can still adjust the zoom and resolution settings to approximate your desired resolution. First set the resolution to the value closest to your desired setting; then adjust the zoom until the resolution value approximates your desired setting.

4. Set zoom (ESC H)

You can set the zoom (image enlargement/reduction) for the main scan and sub scan independently, between the values of 50% to 200%.

After the scanning resolution is set, this command enlarges or reduces the number of dots scanned, independent of the resolution. This results in the scanned image being enlarged or reduced.

Command Usage 2-7

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. First you set the ‘‘skip distance’’ from the origin to the beginning of the main scan and sub scan. Then you set the length of the main and sub scan as measured from the point defined by the skip distance.

You must always set the main scan length in 8-dot units. However, the skip distances and the sub scan length can be set in 1-dot units.

ESC A and other commands

Setting the resolution and zoom value determines the maximum scannable area. You cannot set values that would exceed this maximum scannable area.

6. Set data order (ESC K)

This command selects the order in which image data is scanned. You can set the direction from left to right or from right to left.

2-8 Command Usage

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. You can select from among seven brightness levels; settings in between these seven levels are not possible.

The Set brightness (ESC L) command is ineffective when a gamma table defined with the ESC z command is selected by the ESC Z (Set gamma correction) command.

Command Usage 2-9

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.

Gamma correction processes data for various types of output devices as explained below:

CRT Display A

This setting takes the scanned data and converts it directly to image data. This is suitable for displays that are incapable of displaying different tones of gray or color; for example, displays that can display only 8 or 16 colors. This is also recommended for line or character data that is scanned as bi-level data (1 bit/pixel/color).

2-10 Command Usage

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.

Printer Output A

This is the best choice for output on high-resolution printers (24-dot matrix and laser printers). This type of correction processes image data to appear more as individual dots, lightening the image. This type of processed image may appear light or washed out when shown on a computer display.

Printer Output B

Use this type of correction when printing out on low-resolution printers (9-dot matrix). This type of output device produces images that appear grainy; Printer Output B correction adjusts the data to appear more continuous. The resulting image may appear light or washed out on a computer screen. Also, Printer Output A images appear lighter than Printer Output B images when output on the same device.

Printer Output C

Use this type of processing when images and data are combined. If you use this type of correction, black characters in an image appear sharper, while illustrations are not affected.

Command Usage 2-11

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. De-emphasizing the edges make it appear softer. It is difficult to classify which images appear better with which setting; you must match this setting to your particular document and output device.

2-12 Command Usage

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 command enables or disables halftone processing for bi-level data and quad-level data. The type of processing performed is outlined below. However, the type of processing available differs by scanner model. See Appendix B for details.

This command also enables or disables Text Enhancement Technology. This function is only available for B5 or A5 command level scanners or higher.

❏ No data processing

Unprocessed data is sent directly to the computer. Use this setting when scanning characters or line art that needs no processing.

❏ Halftoning mode A

Produces hard tones using the Error Diffusion method, producing images with higher contrast. This is appropriate for most images.

❏ Halftoning mode B

Produces soft tones using the Error Diffusion method. This method produces a softer image than halftoning mode A.

❏ Halftoning mode C

Produces an image using a screen, again using the Error Diffusion method.

❏ Dither mode A

Processes data using a 4×4 bayer pattern

Command Usage 2-13

❏ 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. Since image data has a value from 0 to 256, you can set the threshold value from 0 to 256.

The threshold values you define with this command remain in effect until you turn off the scanner or redefine new values. The ESC @ (Initialize the scanner) command does not clear these values.

Command Usage 2-15

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. You can use this command to correct colors to match various output devices.

The following output devices can be selected with this command.

❏ Dot-matrix impact printers

Use for color impact printing.

❏ Thermal printers

Use for color thermal printing.

❏ Ink-jet printers

Use for color ink-jet printing.

2-16 Command Usage

❏ 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.

Command Usage 2-17

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. Set the scanning mode (ESC g)

You can select from two modes with this command: high-speed mode and normal mode. The scanner is always in normal mode unless you change it with this command. If you are scanning at 8 bits/pixel (in monochrome) or 8 bits/color/pixel (in color) you must select normal mode.

In high-speed mode, the scanner moves its sensor faster. This is useful if a high degree of scanning precision is not required, or if you are scanning bi-level data such as characters or line drawings.

2-18 Command Usage

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. During line mode, the scanner confirms that the computer receives each line of data after it is sent. By sending data in blocks of multiple lines, you can save the time required for line-by-line confirmation.

Setting the line counter with this command does not necessarily mean the final data block will include that exact number of lines. Make sure your program always checks the line counter value included in each data block when receiving data. For example, if the value X is the number of total lines you are scanning, the number of lines in the final

data block would be MOD[ remainder of the division operation.

ESC d and other commands

⁄

]. The operator MOD indicates the

If you select color line scanning with the ESC C command, you must select a parameter for the ESC d command that is a multiple of 3.

Command Usage 2-19

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.

When using the optional Automatic Document Feeder, you cannot select color page scanning; you should always use the ESC C command to select color line scanning, byte scanning, or monochrome scanning.

If you send this command when using the optional Transparency Unit or Automatic Document Feeder, the scannable area changes. Check the extended status information to determine the new scannable area.

5. Eject (FF)

If you send this command when the Automatic Document Feeder is installed, the scanner returns an ACK code and ejects the document when scanning is completed.

Control Codes

These are commands that control data transfer.

1. Header (STX)

Send this code to indicate the beginning of a data block.

2-20 Command Usage

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. If the scanner receives the CAN code when it is waiting to receive a command, a command error results.

After the scanner cancels scanning, the carriage returns to the home position. Other scanner settings are not affected by canceling scanning. Also, scanning does not resume at the position where it was canceled.

3. Normal response (ACK)

When the scanner receives correct commands or parameters, it sends this code to the computer as a kind of confirmation.

When sending image data, the computer should send an ACK code to the scanner after it receives each data block. When scanning in color, the computer should send an ACK code after each data block for each color.

4. Negative response (NAK)

When the scanner receives an incorrect command or parameter, it sends a NAK code. When the scanner sends this code, a command error also results.

If the scanner returns a NAK code, the previously sent command is not performed. If you were trying to change a scanner setting, the previous setting remains in effect.

Command Usage 2-21

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.

The ID information consists of the following:

❏ The scanner function level ❏ The available scanner resolutions ❏ The maximum scannable area

The maximum resolution and maximum scannable area values are used to determine the available parameters in the Set scanning area (ESC A) command when zoom and resolution are changed.

ID information

1. Scanner function level

The scanner level indicates which commands are supported on the connected scanner, allowing you to make full use of the scanner’s features. You also can determine which commands are not available, so you can avoiding causing command errors.

2. Available resolutions

All scanning resolutions available on the connected scanner are listed in the ID information. All resolutions are available for both the main scan and sub scan; the main scan and sub scan values can be set independently from each other. The last resolution value is the highest resolution available on the scanner.

2-22 Command Usage

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. After checking the scanner function level, send commands available at that level to make the various scanner settings.

3. Refer to the resolution and maximum scannable area information in the ID information and set the resolution, zoom, and scanning area.

4. Start scanning.

To scan again, repeat steps 2 through 4 above.

Command Usage 2-23

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.

ESC I Request ID ESC e Control option ESC C Set color ESC D Set data format ESC B Set halftoning mode ESC L Set brightness ESC Z Set gamma correction ESC M Set color correction ESC Q Set sharpness ESC g Set the scanning mode ESC K Set data order ESC R Set resolution ESC H Set zoom ESC A Set scanning area ESC d Set line counter ESC G Start scanning

Using commands when options are installed

With scanners that are capable of using options, your programs should always check the flag in the status byte to determine if options are installed. Then use the following steps to operate the scanner.

1. Use the ESC I (Request ID) command to obtain the scanner’s ID information. This information includes the scanner’s function level, the scan resolutions available, and the maximum scannable area.

2. Check bit 4 in the ID information status byte. If the bit is not set to 1, no option is installed and option use should be discontinued.

3. Send the ESC f (Request extended status) command to determine the option’s maximum scannable area.

4. Send the ESC e (Control option) command and enable the option.

2-24 Command Usage

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

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. If an error occurs during data reception, the status byte’s error flag and area end flag are set to 1, and the byte counter is set to 0; scanning then ends. After clearing the cause of the error, send the ESC @ (Initialize the scanner) command to reset the scanner and return to step 4.

9. After image scanning is complete, send the FF (Eject document) command (only if you are using the ADF).

10. To repeat scanning, return to step 6.

11. If you don’t plan to use an installed option, always send the ESC e command to disable the option before you begin scanning.

Command Usage 2-25

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.

A data block consists of two parts: the first part contains a header and status block; the second part is the scanned data extended.

Line data structure

Line data consists of a 4-byte information block followed by either an ID information data, an extended status data, or one line of the main scan image data.

The information block size is fixed at four bytes. The amount of data following differs depending on the data type. The byte counter in the information block specifies how much data is contained in the block.

2-26 Command Usage

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).

Information block

An information block is included in all data blocks; and provides information on the beginning of the data block, the current state of the scanner, and the length of the data that follows.

Header

This byte is always set to the STX code (02H), and indicates the beginning of the data block.

Command Usage 2-27

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. These two commands are used to determine if a system error has occurred.

Area end flag (bit 5)

This flag is set to ‘‘1’’ when the data block is the final block of scanned data in the scanning area. Do not send an ACK code to the scanner after receiving the final data block (when this flag is set to 1).

Option flag (bit 4)

This flag is set to ‘‘1’’ when an option is installed.

2-28 Command Usage

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. The counter consists of two bytes (an upper and lower byte); the value of the counter is determined according to the following formula:

(number of data bytes) = (lower byte) + (256 × (upper byte))

Make sure that your program checks the byte counter in each data block and receives all data sent by the scanner. If the computer does not accept all data, the scanner goes into a waiting state.

Line counter

When in block data transfer mode, this counter indicates the number of lines of image data in the block. When in color line scanning mode, data is organized in successive lines of green, red, and blue data (in that order). Each color is counted as a separate line, so the line counter must be a multiple of three. For example, n lines of color data result in a line counter equal to 3n.

Command Usage 2-29

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.

Image data

Image data blocks sent in response to the ESC G (Start scanning) command

ID information data

Data, including the scanner function level, sent in response to the ESC I (Request ID) command

Scanner state data

Data on the scanner’s current settings and parameters sent in response to the ESC S (Request condition) command

Extended status data

Data on the scanner’s option settings sent in response to the ESC f (Request extended status) command

Note: The data block sent in response to the ESC F (Request status) command consists of the information block only; no data block is included. Because of this, the byte counter is set to 0 (00H, 00H). Use this command when you need to check only the contents of the status byte.

Image data

This is the scanned image data sent in response to the ESC G (Start scanning) command. The amount of data sent depends on the current scanner settings.

The commands that determine the amount of data are the ESC D (Set data format) command and the ESC A (Set scanning area) command.

ID information data

This is data sent in response to the ESC I (Request ID) command. This data includes the following.

2-30 Command Usage

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. The values listed are the available values for the parameter in the ESC R (Set resolution) command. The values listed can be assigned to both the main scan and sub scan; the main scan and sub scan can be set independently of one another. The final 5 bytes are the maximum scannable area when the maximum resolution and 100% zoom are selected. This value also varies by scanner model. This value, along with the maximum resolution value, are the maximum parameters available with the ESC A command.

Command Usage 2-31

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.

2-32 Command Usage

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.

Command Usage 2-33

Color page scanning

Use when sending color page data.

2-34 Command Usage

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. The relationship between these commands and the scanning area is explained below.

Command Usage 2-35

Resolution, zoom, and maximum scannable area

The ID information provides you the following values.

(in dpi) : The maximum scannable area available

MAX

(in dots) : The maximum main scan value (at the maximum

MAX

resolution, 100% zoom)

(in dots) : The maximum sub scan value (at the maximum

MAX

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.

Main scan (in dots)

nx = INT

 



MAX MAX

RX × H

100

  

Sub scan

ny = INT

 



MAX MAX

RY × H

100

  

Based on these values, the limits of the parameters for the ESC A command are as follows:

n1 (main scan skip length) : 0 ≤ n1 ≤ nx − 8 n2 (sub scan skip length) : 0 ≤ n2 ≤ ny − 1

n3 (main scan reading length) : 8 ≤ n3 ≤ 8 × INT n4 (sub scan reading length) : 1 ≤ n4 ≤ ny − n

nx − n

 









n1 + n3 ≤ nx n2 + n4 ≤ ny

Note:

The limits of the n3 parameter depend on your scanner model. See your scanner’s manual for details.

2-36 Command Usage

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. However, you should always check the area end flag in the status byte to confirm whether the current data block is the final block. Do not rely solely on your calculations from the ESC A command.

Command Usage 2-37

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.

RX : Main scan resolution (in dpi) RY : Sub scan resolution (in dpi) HX : Main scan zoom (in %) HY : Sub scan zoom (in %)

After setting the above values, determine the ESC A parameters based on the following formulas:

2-38 Command Usage

n1 = INT

LX1 × RX × H

100

n2 = INT

LY1 × RY × H

n3 = 8 × INT

≤ INT

n4 = INT

n1 + n

n2 + n

100



× R

× H







× RY × H

100





100

maximum main scan length





maximum resolution



maximum sub scan length





maximum resolution



  



× H



× H

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.

Rough scanned image Image after trimming

RX1 : Main scan resolution (dpi) RX2 : Main scan resolution (dpi) RY1 : Sub scan resolution (dpi) R

: Sub scan resolution (dpi)

HX1 : Main scan zoom (%) HX2 : Sub scan zoom (%) HY1 : Sub scan zoom (%) H

: Sub scan zoom (%)

n1 : main scan skip length N1 : main scan skip length n2 : sub scan skip length N2 : sub scan skip length n3 : main scan reading length N3 : main scan reading length n4 : sub scan reading length N4 : sub scan reading length

2-40 Command Usage

Determining setting values after trimming

After trimming an image, you should resend the ESC A command using the following parameters.



N1 = INT

n1 × RX2 × H

 



N2 = INT

n2 × RY2 × H

 

N3 = 8 × INT



N4 = INT

n4 × RY2 × H

 

N1 + N3 ≤ INT

N2 + N4 ≤ INT

× H



n3 × RX2 × H





RX1 × H



× H



(maximum main scan length)

 



(maximum sub scan length )

 























maximum resolution )

(

maximum resolution )

(



× H

100

× H

100



 



 

The parameters for the ESC R, ESC H, and ESC A command should be set to the following.

ESC R : n

ESC H : i

ESC A : n

= H

= R

= N

= R

X2,

= H

X2,

, n2 = N2, n

= N

, n4 = N

Command Usage 2-41

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.

Rough scanned image Printing size after trimming

RX1 : Main scan resolution (dpi) RPX : Printer resolution (dpi) RY1 : Sub scan resolution (dpi) main scan (horizontal) HX1 : Main scan zoom (%) RPY : Printer resolution (dpi) HY1 : Sub scan zoom (%) sub scan (vertical)

Main scan skip length (inches): L

Sub scan skip length (inches): L

Main scan reading length (inches): L

Sub scan reading length (inches): L

n3 × 100

RX1 × H

RY1 × H

2-42 Command Usage

n1 × 100

n2 × 100

n4 × 100

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.



 

X × 100

Y × 100

N2 = INT



N4 = INT







n2 × RPY × H



RY1 × H

 

n4 × RY2 × H



RY1 × H



RX × H

100

RY × H

100















 



 

Main scan zoom (%): H

Sub scan zoom (%): H



N1 = INT

n1 × RPX × H



RX1 × H



N3 = 8 × INT

N1 + N3 ≤ INT

N2 + N4 ≤ INT



n3 × RPX × H





RX1 × H





(maximum main scan length)

 



(maximum sub scan length )

 







maximum resolution )

(

maximum resolution )

(

The parameter values for the ESC R, ESC H, and ESC A commands then become as follows:

ESC R : n1 = RPX, n2 = R

ESC H : i1 = HX, i2 = H

ESC A: n1 = N1, n2 = N2, n3 = N3, n4 = N

Note: On scanners that can respond to printers and other various output devices, you can set the RPX and RPY values to match the horizontal and vertical resolution of your target printer.

Command Usage 2-43

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.

Cause:

The scanner receives an undefined command.

The scanner receives a command with incorrect parameters.

Scanner’s response:

The scanner returns a NAK code to the computer, ignores the incorrect command or parameters, and waits for the next command.

Error recovery procedure:

Send a correct command; the scanner then clears the error condition.

Communications error

A communication error occurs when the scanner and computer cannot communicate properly.

Cause:

The interface is disconnected or not connected properly.

2-44 Command Usage

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.

System error

The scanner itself is not functioning properly.

Cause:

The lamps are disconnected or burned out.

The shipping screw has not been removed from the carriage (the scanner cannot perform the carriage initialization procedure).

The scanner is broken.

During scanning, an option error was detected (cover open, paper jam, etc.).

Scanner’s response:

The lamps turn off and the scanner stops moving.

Command Usage 2-45

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.

Set the SCSI’s reset line to active.

Option error

When an option is installed and the ESC e (Control option) command is enabled, this error occurs if the option does not operate properly.

Cause:

An option error is detected (cover open, paper jam, etc.).

Scanner’s response:

Bit 7 (error flag) of the status byte is set to ‘‘1.’’

The appropriate bit in the extended status byte is set.

Error recover procedure:

Correcting the cause of the error clears the error condition.

2-46 Command Usage

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.

Note:

All settings have initial default values, and some models have settings that can be set using DIP switches or the control panel. However, settings made using commands take precedence over these other setting methods; to avoid errors and confusion, it is recommended you make necessary settings using commands whenever possible.

Command Usage 2-47

Commands and function level table

The following table shows which commands are available at each function level.

Command type Command name Command Function

Level

Execution commands

Data format commands

Image setting commands

Image processing commands

Auxiliary commands Set scanning mode ESC g B4

* The parameters for these commands differ by function level.

Request ID ESC I B1 Request status ESC F B1 Request extended status ESC f Extended Request condition ESC S B1 Start scanning ESC G B1 Set data format ESC D B1 Set resolution ESC R B1 Set zoom ESC H B2 Set scanning area ESC A B1 Set color ESC C B1* Set data order ESC K B5, A5 Set brightness ESC L B2 Set gamma correction ESC Z B2* Download gamma table ESC z B4 Set sharpness ESC Q B4 Set halftoning mode ESC B B1* Download dither pattern ESC b B4 Set color correction ESC M B3 Download color correction ESC m B4 Set auto area segmentation ESC s A5

Set line counter ESC d B4 Control option ESC e Extended Eject document FF Extended Initialize the scanner ESC @ B2 Abort scanning CAN B1

2-48 Command Usage

Function level and commands

The commands added at each function level are listed in the table below.

Function level Command

B1 ESC G (Start scanning)

B2 ESC L (Set brightness)

B3 ESC M (Set color correction) B4 ESC z (Download gamma table)

B5, A5 ESC K (Set data order) A5 ESC s (Set auto area

ESC I (Request ID) ESC F (Request status) ESC S (Request condition) ESC R (Set resolution) ESC A (Set scanning area) CAN (Abort scanning) ESC D (Set data format) ESC C (Set color) ESC B (Set halftoning mode)

ESC Z (Set gamma correction) ESC H (Set zoom) ESC @ (Initialize the scanner)

ESC Q (Set sharpness) ESC b (Download dither pattern) ESC g (Set scanning mode) ESC d (Set line counter) ESC m (Download color correction)

segmentation)

Extended ESC f (Request extended status)

ESC e (Control option) FF (Eject document)

Command Usage 2-49

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.

❏ Resolution

The resolutions available vary by scanner model and can be obtained from the ID information returned by the scanner when you send the Request ID command. If you use the ESC R command to specify a resolution that is not available on the connected scanner, a command error results. The last resolution listed in the ID information is the maximum resolution available on the connected scanner.

❏ Maximum scannable area

The maximum scannable area (# of main scan dots × # of sub scan dots) you can set with the ESC A command differs by scanner model. This value can be calculated from the maximum resolution and maximum area values found in the ID information.

❏ Zoom setting increments (1% or 10%)

You can adjust the zoom value from 50% to 200%. However, the minimum increment you can use to adjust the zoom value differs by scanner model, and is either 1% or 10%. If you make a zoom setting that is not a multiple of 10% on a scanner that only allows 10% increments, the scanner rounds the setting to the nearest increment of 10%. (The scanner either corrects or deletes image data to conform with the ESC A setting. Although this can result in the image differing slightly from what you expect, you do not need to take this into consideration within your program.)

❏ Options

To determine whether an option is installed on the connected scanner, send the ESC F command and check the option flag in the resulting status byte. You should also use the ESC f command to determine the maximum scannable area when the option is installed.

2-50 Command Usage

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.

Solution

Always set the scanning area with the ESC A command.

Use the ESC I command to determine the current scanner’s maximum scannable area, and make sure the parameters in the ESC A command do not exceed those values.

Command Usage 2-51

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’’... (B5, A5)

This ensures that information on a particular model name is not checked by your program.

Problem:

Although you have attached a new scanner capable of a higher resolution, you cannot achieve that resolution when scanning.

Cause

Your program is still using the scanning resolution settings you obtained from the previous scanner model.

Solution

Use the ESC I command to obtain the scanning resolution values each time you scan.

2-52 Command Usage

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 speed of image data transfer remains the same, whether you use a SCSI or bi-directional parallel interface.

Cause

Your program is writing each line of image data to your hard disk as the data is received.

Solution

When using scanners of B4 level or higher, always use block data transfer.

Command Usage 2-53

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:

After using a scanner option (Automatic Document Feeder or Transparency Unit), a different program attempts scanning. Although the second program tries to scan without using the option, the option remains operational.

Cause

Your program did not exit option mode upon completion.

Solution

Always exit option mode upon program completion.

2-54 Command Usage

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).

Problem:

When writing data from a GT-6000 or GT-4000 to a magneto-optical disk, an interface error occurs on the scanner.

Cause

On the GT-6000/4000, the scanner produces an interface error if no handshake response is received within 30 seconds. If a writing operation takes longer than 30 seconds, this error occurs.

Solution

Adjust the size of your data buffer so that no writing operation takes longer than 30 seconds.

Here are some additional items to consider when you write a scanner program.

Command Usage 2-55

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.

Parallel interface

❏ If your program sends a command immediately after resetting the

scanner and gets a BUSY signal, wait at least 1 ms and send the command again.

Option

❏ Always send a FF command after you complete reading of a

document from an ADF.

Using the ESC I command

❏ Always check the scanner information at the beginning of your

program. (This is not necessary if you provide a different driver for each scanner model.)

About the function level

❏ Since higher-level scanners contain all the functionality of

lower-level scanners, no errors occur when you use a low-level scanner program on a higher-level scanner.

❏ When running a program designed for a high-level scanner on a

lower-level scanner, make sure your program does not send any unsupported commands; otherwise, an error results.

2-56 Command Usage

Chapter 3

Command Reference

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. The five command types are:

Execution: Requests the scanner to send

back data

Data form definition: Specifies the format of data to be

sent from the scanner

Image definition: Sets image modes Image processing: Specifies any enhancement

processes to be used

Auxiliary: Helps control the scanner

Execution commands

These commands obtain data from the scanner.

Request ID ESC I Request status ESC F Request extended status ESC f Request condition ESC S Start scanning ESC G

Data form definition commands

These commands specify the format of image data and data transfer.

Set color ESC C Set data format ESC D Set resolution ESC R Set zoom ESC H Set scanning area ESC A Set data order ESC K

3-2 Command Reference

Image definition commands

Set conditions for image reading with these commands.

Set brightness ESC L Set gamma correction ESC Z Download gamma table ESC z Set sharpness ESC Q

Image processing commands

Process images before data transfer with these commands.

Set halftoning mode ESC B Download dither pattern ESC b Set color correction ESC M Download color correction ESC m Set auto area segmentation ESC s

Supplemental commands

Operate the scanner mechanism with these commands.

Initialize the scanner ESC @ Set line counter ESC d Set scanning mode ESC g Control option ESC e Eject document FF

Control codes

Perform handshaking between the computer and scanner using these commands.

Header STX Abort scanning CAN Normal response ACK Abnormal response NAK

Command Reference 3-3

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.)

Command title

Indicates the name and function of the command

Command format

Shows the structure of the command and any associated parameters Command: Shows the command code sequence in ASCII, decimal,

and hexadecimal formats

Parameter: Lists parameters, if applicable

Some commands require parameters to be sent after the command has been accepted by the scanner. Commands and parameters are listed separately if the handshaking method requires they be sent separately.

Parameters denoted by n are two-byte parameters (ranging from 0 to 65,535 decimal), with the lower byte preceding the higher byte. Where necessary, the lower byte is denoted by L and higher byte by H.

Parameters denoted by i are one-byte parameters (ranging from 0 to 255 decimal).

Parameters denoted by d are signed one-byte parameters (ranging from -127 to 127 decimal).

3-4 Command Reference

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. See Chapter 2 for details.

Command Reference 3-5

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.

❏ The scanner’s functional level identification ❏ The resolution settings available ❏ The maximum scannable area at the maximum resolution and

100% zoom (main scan by sub scan in dots)

3-6 Command Reference

Epson GT-300, GT-1000, GT-6000, ES-300GS, GT-8500 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual