Epson TM-T20 Quick Reference Manual

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ESC/POS Quick Reference

ESC/POS

Command System

EPSON ESC/POS is a proprietary POS printer command system based on the

escape sequence and includes patented or patent pending commands. ESC/POS is

compatible with most type of EPSON POS printers and displays.

ESC/POS is designed to reduce the processing load on the host computer in POS

environments. It comprises a set of highly functional and efficient commands and

also offers the flexibility to easily make future upgrades.

Aim of the Quick Reference

Quick Reference is a guide to using ESC/POS command to control the printer.

Command Notation

: real-time command (executed as soon as received)

•

fn=

: function number of the command

•

Numbers are written in decimal numeral.

•

n specifies 1 byte parameter in the range 0–255.

•

• n

, n

specify 1 word (2 bytes) parameter as (n

0–65,535.

pL, pH specify the number of parameters after pH as (pL+pH×256) in the range

•

1–65,535

p1, p2, p3, p4 specify the number of parameters after p4 as

•

(p1+p2×256+p3×65,536+p4×16,777,216) in the rage 1–4,294,967,295.

kc1, kc2 specify key code (2 bytes) of NV graphics or download graphics. Each

•

range of kc1 and kc2 is 32–126.

Control codes are as follows:

•

name

code

NUL

EOT

ENQ

DLE

DC4

CAN

ESC

No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form

or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior

written permission of Seiko Epson Corporation.

The contents of this document are subject to change without notice. Please contact us for the latest

information.

While every precaution has been taken in the preparation of this document, 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.

Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or

third parties for damages, losses, costs, or expenses incurred by the purchaser or third parties as a

result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or

alterations to this product, or (excluding the U.S.) failure to strictly comply with Seiko Epson

Corporation's operating and maintenance instructions.

Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of

any options or any consumable products other than those designated as Original EPSON Products or

EPSON Approved Products by Seiko Epson Corporation.

EPSON and ESC/POS are registered trademarks of Seiko Epson Corporation in Japan and other

countries/regions.

Print Commands

In page mode, these commands only move the print position and do not execute

•

actual printing.

ESC J n

ESC d n

Line Spacing Commands

ESC 2

ESC 3 n

Character Commands

ESC SP n

+ n×256) in the range

ESC

−

ESC E n

ESC G n

ESC M n

GS ! n

GS b n

GS B n

ESC { n

ESC V n

ESC & 3 c1 c2 [x1 d1...d(3 × x1)]...[xk d1...d(3 × xk)]

ESC % n

M00051201

Prints data and feeds one line.

Functions the same as LF when auto line feed is enabled.

CR is ignored when auto line feed is disabled or when the

serial interface model is used.

Prints data and feeds paper n dots.

Prints data and feeds paper n lines.

Selects default line spacing.

Sets line spacing to n dots.

Sets right-side character spacing to n dots.

Selects underline.

n = 0: underline off, n = 1: 1-dot width, n = 2: 2-dot width

Turns emphasized character On or Off.

n = odd: On, n = even: Off

Turns double-strike character On or Off.

n = odd: On, n = even: Off

Selects a character font.

n = 0, "0": Font A, n = 1, "1": Font B

Selects character size (height/width magnification).

Upper 4 bits of n: width magnification

Lower 4 bits of n: height magnification

The both can be set 0(×1) to 7(×8)

Turns smoothing On or Off for magnified characters.

n = odd: On, n = even: Off

Turns white/black reverse print On or Off for characters.

n = odd: On, n = even: Off

Turns upside-down print mode On or Off in standard

mode.

n = odd: On, n = even: Off

Turns 90° clockwise rotation On or Off for characters in

standard mode.

n = 1, 2, "1", "2": On, n = 0, "0": Off

Defines user-defined characters for character code: c1 to

c2 of the current font.

x = width of the defined pattern

d1...d(3×x) = pattern data for a character

Selects or cancels user-defined character set.

n = odd: Select, n = even: Cancel

Character Commands (continued)

ESC ? n

Cancel the user-defined character and return the font

pattern to the resident one for the current font.

n = character code to be cleared the user-defined font

ESC t n

Selects page n from the character code table.

code table

PC437: USA, Standard Europe

PC855: Cyrillic

Katakana

PC861: Icelandic

PC850: Multilingual

PC862: Hebrew

PC860: Portuguese

PC864: Arabic

PC863: Canadian-French

PC869: Greek

PC865: Nordic

ISO8859-2: Latin2

PC851: Greek

ISO8859-15: Latin9

PC853: Turkish

PC1098: Farsi

PC857: Turkish

PC1118: Lithuanian

PC737: Greek

PC1119: Lithuanian

ISO8859-7: Greek

PC1125: Ukrainian

WPC1252

WPC1250: Latin2

PC866: Cyrillic #2

WPC1251: Cyrillic

PC852: Latin2

WPC1253: Greek

PC858: Euro

WPC1254: Turkish

KU42: Thai

WPC1255: Hebrew

TIS11: Thai

WPC1256: Arabic

TIS18: Thai

WPC1257: Baltic Rim

TCVN-3: Vietnamese

WPC1258: Vietnamese

TCVN-3: Vietnamese

KZ-1048: Kazakhstan

PC720: Arabic

255 User-defined page

WPC775: Baltic Rim

ESC R n

Selects an international character set by n.

country

USA

Norway

France

Denmark II

Germany

Spain II

U.K.

Latin America

Denmark I

Korea

Sweden

Slovenia/ Croatia

Italy

China

Spain I

Vietnam

Japan

Arabia

Print Position Commands

Moves print position to the next horizontal tab position.

ESC D n1...nk NUL

Sets tab stops at n1 to nk character columns.

GS L nL nH

Sets left margin in standard mode.

nL + nH×256: number of dots for left margin

GS W nL nH

Sets print area width in standard mode.

nL + nH×256: number of dots for print area width

ESC a n

Aligns all data in one line to the selected layout in

standard mode.

n = 0, "0": Left justification

n = 1, "1": Centering

n = 2, "2": Right justification