Epson RP-U420 User Manual

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RP-U420

Application Programming Guide

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ESC/POS

RP-U420 Application Programming Guide Version 1.0 Seiko Epson Corporation System Device Division

Notice: The contents of this manual are subject to change without notice

EPSON and ESC/POS are registered trademarks of Seiko Epson Corporation. Acrobat

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ESC/POS

BY USING THIS DOCUMENT, YOU AGREE TO ABIDE BY THE TERMS OF THIS AGREEMENT. PLEASE RETURN THIS DOCUMENT IMMEDIATELY IF YOU DO NOT AGREE TO THESE TERMS.

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Usable application programs and tips

■ ■ ■

USABLE APPLICATION PROGRAMS AND TIPS

System Processing

This example illustrates ESC/POS command functions and printing results. Item 2-1 shows a combination of receipt and journal printing. Item 2-2 shows processing to issue a Taiwan receipt. Tips include features of stamp printing and usage of the ESC o command. Note: Print samples are images of the printing results of the program samples. They do not represent the actual printing.

2-1 Journal and Receipt Combination Printing

The example shows procedures and a program sample for printing part of data on a receipt and journal at the same time. At first you need to set DIP Switch 1-8 (Printer mode selection) to Off (Standard mode); then turn on the power.

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Print Sample

Receipt Journal

Stamp

■ ■ ■

July 6, 2000, 10:30

RP-U420 420 PS-170 170 TOTAL 590

PAID 600 CHANGE 10

#12345

←

Date and Time

Item A

Item B

←

Cutting position

July 6, 2000, 10:30 #12345

RP-U420 420 PS-170 170 TOTAL 590

Item A

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System Processing Procedures

Procedure Commands used Description

1. Initialization ESC @ Executes initialization.

■ ■ ■

2. Print date and time ESC c 0, ESC z

RS, LF

3. Print Item A ESC z, LF Prints Item A.

4. Execute a stamp for the next receipt

5. Print Item B LF Prints Item B.

6. Issue a receipt ESC p 0, GS V

Step 4 is necessary for effective use of paper. Refer to the tips section for details.

ESC c 0, ESC o Executes a stamp for the next receipt.

ESC c 0, LF

Prints different data on receipt and journal. Jumps to the print position on journal (journal tab).

ESC z a parallel printing for the same data on both receipt and journal.

Prints a slip number, operates a drawer, cuts a receipt, feeds journal paper.

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Programming Example

PRINT #1, CHR$(&H1B);"@"; ← Initializes the printer

■ ■ ■

PRINT #1, CHR$(&H1B);"c0";CHR$(3); PRINT #1, CHR$(&H1B);"z";CHR$(0); PRINT #1, “July 6, 2000 10:30”;CHR$(&H1E); PRINT #1, “July 6, 2000 10:30 #12345”;CHR$(&HA);CHR$(&HA); PRINT #1, CHR$(&H1B);"z";CHR$(1);

PRINT #1, "RP-U420 420";CHR$(&HA); PRINT #1, "PS-170 170";CHR$(&HA); PRINT #1, "TOTAL 590";CHR$(&HA); PRINT #1, "----------------------------";CHR$(&HA);

PRINT #1, CHR$(&H1B);”c0”;CHR$(2); PRINT #1, CHR$(&H1B);”o”;

PRINT #1, "PAID 600";CHR$(&HA); PRINT #1, "CHANGE 10";CHR$(&HA);CHR$(&HA);

PRINT #1, CHR$(&H1B);"p";CHR$(0);CHR$(2);CHR$(20); PRINT #1, “ #12345”;CHR$(&HA);CHR$(&HA); PRINT #1, CHR$(&H1D);"V";CHR$(66);CHR$(0); PRINT #1, CHR$(&H1B);”c0”;CHR$(1); PRINT #1, CHR$(&HA); END

←

Executes stamp for the next sheet

←

Feeds journal

Selects a print sheet

←

Cancels parallel printing on receipt and journal

←

Selects parallel printing on receipt and journal

←

Selects receipt

←

drawer kick-out

←

Feeds paper to the cutting position

←

Selects journal

←

Prints date and time

Item A

Stamp

Item B

Issues receipt

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■ ■ ■

2-2 Issuing Taiwan Receipt

The example shows procedures and a program sample for issuing a Taiwan receipt, which has black marks. At first you need to set DIP Switch 1-8 (Printer mode selection) to On (Taiwan mode); then turn on the power.

Print Sample

Receipt

Predefined logo

Stamp

01-01-01 #12345 RP-U420 420 PS-170 170 TOTAL 590

PAID 600 CHANGE 10

Date and Time

←

Item A

Item B

: The relationship between the

Note

paper cut position and the mark sensor position may not be exact because the paper feed pitch for this printer is 4.23 mm.

RP-U420 Usable application programs and tips

Cutting positon

←

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System Processing Procedures

Procedure Commands used Description

1. Initialization ESC @ Executes initialization.

■ ■ ■

2. Print details ESC c 0, ESC z

ESC d, LF

3. Execute a stamp for the next receipt

4. Issue a receipt FF Feeds a receipt to the next black mark position and cuts the receipt.

Step 3 is necessary to execute a stamp at the correct position. Refer to the tips section for details.

ESC d, ESC o Executes a stamp for the next receipt.

Prints date, slip number, and details on both receipt and journal. ESC z executes parallel printing of the same data on both receipt and

journal.

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Programming Example

PRINT #1, CHR$(&H1B);"@"; ← Initializes the printer

■ ■ ■

PRINT #1, CHR$(&H1B);"c0";CHR$(3); PRINT #1, CHR$(&H1B);"z";CHR$(1);

PRINT #1, CHR$(&H1B);”d”;CHR$(6); PRINT #1, “01-01-01 #12345”;CHR$(&HA); PRINT #1, "RP-U420 420";CHR$(&HA); PRINT #1, "PS-170 170";CHR$(&HA); PRINT #1, "TOTAL 590";CHR$(&HA); PRINT #1, "----------------------------";CHR$(&HA); PRINT #1, "PAID 600";CHR$(&HA); PRINT #1, "CHANGE 10";CHR$(&HA);

PRINT #1, CHR$(&H1B);”d”;CHR$(23); PRINT #1, CHR$(&H1B);”o”; PRINT #1, CHR$(&HC); END

←

Executes stamp for the next sheet

←

Issues a receipt

Selects a print sheet

←

Selects parallel printing on receipt and journal

←

Feeds 6-line

←

Feeds 23-line

←

Prints details

Stamp

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■ ■ ■

Tips

RP-U420 has a stamp function. ESC o executes a stamp once. When printing a stamp, you need to set line spacing, depending on the position of each mechanism.

Positions for print head, stamp, and cutter

←

autocutter

manual cutter

8-line

←

print head

11-line

stamp

(

When DIP switch 1-7 is Off)

If you want to print characters just below the stamp after executing it, you need to feed 12 lines in advance.

1. Execute a stamp (ESC o).

2. Feed 12 lines (ESC d 12).

3. Print data (pint data + LF).

When DIP switch 1-7 is On)

stamp

8-line

←

11-line

print head

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However, if you do the procedures above at the beginning of a receipt issue transaction, there will be space of about 14 lines above the stamp. As the program examples in this section show, if printing of a stamp for the second receipt is executed during the receipt printing for the first receipt, you can print a receipt without unnecessary spaces. If you use the autocutter, follow the steps below.

1. Print data up to the line so that the rest of the lines to be printed are 5 lines from the edge of the receipt.

2. Execute a stamp (ESC o).

3. Print data for the last 5 lines (print data + LF).

4. Feed paper to the cutting position and execute a paper cut (GS V). Note: 5 lines used in the procedures are a reference value.

When deciding the stamp position in the Taiwan mode, you need to take the current position of the black mark into consideration. In Taiwan mode, feed paper to the black by FF and execute a paper cut.

Paper position after FF is executed

←

autocutter or manual cutter position

1 to 6 mm (*)

(*) The relationship between the paper cut position and the mark sensor position may not be exact because the paper feed pitch for this printer is

4.23 mm.

When issuing a black mark receipt, follow the same procedures as when you print a stamp for the second receipt during receipt printing for the first receipt. Refer to 2-2, Issuing Taiwan Receipt, for details.

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Definitions

DEFINITIONS

(1) Normal commands

Normal commands are all the commands except real-time commands. The normal commands are stored in the receive buffer temporarily and then processed sequentially.

(2) Real-time commands

Real-time commands are the commands that consist of a DLE extension (such as DLE EOT or DLE ENQ). The realtime commands execute processing when received. After executing, they are stored in the receive buffer and then discarded as undefined codes when the normal commands are processed.

(3) Receive buffer

The receive buffer is used to store data from the host computer. All received data is stored in this buffer and processed in the order received. Buffer capacity depends on the printer model used.

(4) Print buffer

The print buffer is used to store image data for printing.

(5) Print buffer-full

This is the state which occurs when the print buffer becomes full.

■ ■ ■

(6) Print buffer-full printing

If new print data (such as characters or bit images) or horizontal tabs are processed in standard mode when the print buffer is full, the image data already stored in the print buffer is printed and a line feed is executed. This is the same operation as LF. The data (print data or horizontal tab) that causes the print buffer full is processed from the beginning of the next line.

(7) Beginning of the line

The beginning of the line means that no data exists in the print buffer, and the beginning of the line is the left margin.

(8) Printable area

This is the maximum printable area specified for each printer model.

(10) Ignoring a command

This is the printer state in which the printer does nothing after receiving all codes, including parameters.

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(11) Horizontal/vertical direction

Horizontal direction is the direction which is perpendicular to the paper feed direction. Vertical direction is the paper feed direction.

(12) Baseline

The baseline for character sets that are 9 dots high (for example, 7 × 9 and 9 × 9) is the invisible line marking the bottom of the character matrix (the bottom of the lowest dot possible), but for other character sets, the baseline is the bottom of all characters, except that descenders, such as the bottom parts of “g” and “y,” are below the baseline.

(13) Setting commands

The commands that change printer status by processing a command and affect printer operation and print results thereafter. The commands that can specify enhanced characters, set paper feed amount, and select a character are setting commands and some of the normal commands are setting commands.

(14) Executing commands

The commands that affect printer operation and change the printer status temporarily but do not affect the following printer operation. Functions of printing, paper cutting, and status transmission are executing commands and the real-time commands and some of the normal commands are executing commands.

(15) MSB

Most Significant Bit

(16) LSB

Least Significant Bit

(18) “Reserved“ bit

“Reserved” bits are as follows:

• Bit which will be used for an extended function in the future.

• Bit which has a function in the ESC/POS specification; however, the printer does not support the function. Use a bit with a value indicated in a table.

(19) “Fixed” bit

Use a bit only with a value indicated in a table.

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Character code tables

CHARACTER CODE TABLES

SP in a table represents space. See Using the character code tables for information on how to read these tables.

Page 0 (PC437: U.S.A., Standard Europe) (International character set: U.S.A.)

■ ■ ■

RP-U420 Character code tables

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Page 1 (Katakana)

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RP-U420 Character code tables

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Page 2 (PC850: Multilingual)

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RP-U420 Character code tables

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Page 3 (PC860: Portuguese)

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RP-U420 Character code tables

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Page 4 (PC863: Canadian-French)

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RP-U420 Character code tables

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Page 5 (PC865: Nordic)

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RP-U420 Character code tables

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Page 16 (WPC1252)

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RP-U420 Character code tables

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Page 17 (PC866: Cyrillic #2)

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RP-U420 Character code tables

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Page 18 (PC862: Latin2)

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RP-U420 Character code tables

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Page 19 (PC858: Euro)

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Using the character code tables

USING THE CHARACTER CODE TABLES

The example below uses Page 0 (PC437) to illustrate the use of the character code tables.

You can find the character "A" in Page 0 as follows:

The decimal value for the character "A" is 65. Follow its column straight up to find the digits. Hexadecimal 4 Binary 0100 These numbers are the most significant bits of the ASCII code. Follow its row to the left to find the digits. Hexadecimal 1 Binary 0001 These numbers are the least significant bits of the ASCII code. The combination of the numbers above is the ASCII code for character "A". Decimal 65 Hexadecimal 41 Binary 01000001

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RP-U420 supported commands

■ ■ ■

RP-U420 SUPPORTED COMMANDS

Command Classification Name Function type Page

ESC !

ESC %

ESC &

ESC ✻

ESC <

ESC =

ESC ?

ESC @

XECUTING COMMAND

ETTING COMMAND

XECUTING COMMAND

ETTING COMMAND

XECUTING COMMAND

ETTING COMMAND

Print and line feed

Print and feed paper to print starting position

Print and carriage return

Journal tab

Select print mode(s)

Select/cancel user-defined character set

Define user-defined characters

Select bit-image mode

Return home

Select device

Cancel user-defined characters

Initialize printer

RINT COMMANDS

RINT POSITION COMMANDS

HARACTER COMMANDS

BIT-

IMAGE COMMANDS

ECHANISM CONTROL COMMANDS

ISCELLANEOUS COMMANDS

HARACTER COMMANDS

ISCELLANEOUS COMMANDS

ESC R

ESC c 0

ESC c 3

ETTING COMMAND

XECUTING COMMAND

ETTING COMMAND

Select an international character set

Select paper type(s) for printing

Select paper sensor(s) to output paper-end signals

RP-U420 RP-U420 supported commands

HARACTER COMMANDS

RINTING PAPER COMMANDS

APER SENSOR COMMANDS

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Command Classification Name Function type Page

ESC c 4

ESC c 5

ESC d

ESC f

ESC o

ESC p

ESC t

ESC z

FS &

FS .

GS I

GS V

ETTING COMMAND

XECUTING COMMAND

ETTING COMMAND

XECUTING COMMAND

ETTING COMMAND

XECUTING COMMAND

Select paper sensor(s) to stop printing

Enable/disable panel buttons

Print and feed n lines

Set validation paper waiting time

Stamp

Generate pulse

Select character code table

Turn parallel printing mode on/off for receipt and journal

Select Kanji character mode

Cancel Kanji character mode

Transmit printer ID

Feed paper to the cutting position and cut it

APER SENSOR COMMANDS

ANEL BUTTON COMMAND

RINT COMMANDS

RINTING PAPER COMMANDS

ECHANISM CONTROL COMMANDS

ISCELLANEOUS COMMANDS

HARACTER COMMANDS

ANJI COMMANDS

ISCELLANEOUS COMMANDS

ECHANISM CONTROL COMMANDS

GS r

DLE EOT

DLE ENQ

DLE DC4

XECUTING COMMAND

Transmit status

Real-time status transmission

Real-time request to printer

Generate pulse at real-time

RP-U420 RP-U420 supported commands

TATUS COMMANDS

ISCELLANEOUS COMMANDS

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Print commands

[Name] [Format]

[Range] [Default] [Description] [Notes] This command sets the print position to the beginning of the line.

PRINT #1, "AAAAA"; CHR$(&HA); AAAAA PRINT #1, "BBBBB"; CHR$(&HA); BBBBB

Print and line feed ASCII LF

Hex 0A Decimal 10

None None Prints the data in the print buffer and feeds one line, using 4.2 mm {1/6"}.

Program Example Print Sample

XECUTING COMMAND

RP-U420 Print commands LF

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Print commands

XECUTING COMMAND

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ This command is effective only in the Taiwan mode (when DIP switch 1-8 is ON). This mode can be set to

Print and feed paper to print starting position ASCII FF

Hex 0C Decimal 12

None None When DIP switch 1-7 is OFF (autocutter installed):

When receipt is selected as the print sheet, prints the data in the print buffer and feeds to the next print starting position and cut (one point left uncut).

When journal is selected as the print sheet, prints the data in the print buffer and feeds to the next print starting position.

When DIP switch 1-7 is ON (manual cutter installed):

When receipt or journal is selected as the print sheet, prints the data in the print buffer and feeds to the next print starting position.

the printer which is equipped with the Taiwan black mark sensor.

■ This command is effective only when receipt or journal is selected as the print sheet.

■ After the operation, the printer sets the print starting position to the beginning of a line.

■ The paper is not fed when the paper is present at the print starting position or when the mark sensor

detects the marked portion. The paper is fed when the paper is not present at the print starting position or when the mark sensor does not detect the marked portion.

Program Example for all printers Print Sample

PRINT #1, CHR$(&H1B);"c0";CHR$(2); ← Select paper type AAAAA PRINT #1, "AAAAA"; CHR$(&HA); BBBBB PRINT #1, "BBBBB"; CHR$(&HC);

RP-U420 Print commands FF

Cut receipt

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Print commands

[Name] [Format]

[Range] [Default] [Description] [Notes] Sets the print starting position to the beginning of the line.

PRINT #1, "AAAAA";CHR$(&HD); BBBBB ← Auto line feed enabled PRINT #1, " BBBBB";CHR$(&HA); AAAAABBBBB ← Auto line feed disabled

Print and carriage return ASCII CR

Hex 0D Decimal 13

None None Prints the data in the print buffer and does not feed the paper.

Program Example Print Sample

AAAAA

XECUTING COMMAND

RP-U420 Print commands CR

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Print position commands

[Name] [Format]

[Range] [Default] [Description] [Notes] This command is effective when all the following conditions are satisfied simultaneously:

PRINT #1, CHR$(&H1B);"c0";CHR$(3); ←Select paper type (receipt and journal) PRINT #1, CHR$(&H1B);"z";CHR$(0); ←Cancel parallel printing mode PRINT #1, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"; PRINT #1, "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";CHR$(&HA); PRINT #1, "CCCCCCCCCCCCCCCCCCCC";CHR$(&H1E); PRINT #1, "DDDDDDDDDDDDDDDDDDDD";CHR$(&HA);

Journal tab ASCII RS

Hex 1E Decimal 30

None None Moves the print starting position to the beginning of the print area for the journal.

■ Both receipt and journal are selected for the print sheet.

■ The parallel printing mode for receipt and journal is turned off.

■ The print area is set within a printable area on the receipt.

Program Example

XECUTING COMMAND

Print Sample <Receipt> Print Sample <Journal>

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB CCCCCCCCCCCCCCCCCCCC -----------journal tab-------- DDDDDDDDDDDDDDDDDDDD

RP-U420 Print position commands RS

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Character commands

■ ■ ■

ESC !

[Name] [Format]

[Range] [Default] [Description]

Select print mode(s) ASCII ESC !

Hex 1B 21 Decimal 27 33

0 ≤ n ≤ 255

= 0

Selects print mode(s) using n as follows:

Bit Off/On Hex Decimal Function

0 Off 00 0 Reserved 1 Off 00 0 Reserved 2 Off 00 0 Reserved 3 Off 00 0 Reserved 4 Off 00 0 Reserved 5 Off 00 0 Double-width mode not selected

n n n

ETTING COMMAND

On 20 32 Double-width mode selected 6 Off 00 0 Reserved 7 Off 00 0 Underline mode not selected

On 80 128 Underline mode selected

[Notes]

If the underline is added to the characters to be printed, the lowest bit of the characters overlaps the underline; therefore, this may cause difficulty in reading. Keep this in mind when the underline is added.

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Program Example Print Sample

PRINT #1, CHR$(&H1B);"!";CHR$(0); "AA"; PRINT #1, CHR$(&H1B);"!";CHR$(32); "BB"; CHR$(&HA); PRINT #1, CHR$(&H1B);"!";CHR$(128); "AA"; PRINT #1, CHR$(&H1B);"!";CHR$(160); "BB"; CHR$(&HA);

←

AA: Normal BB, Double-width

with underline

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Character commands

■ ■ ■

ESC %

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ Only the LSB of n is valid.

Select/cancel user-defined character set ASCII ESC %

Hex 1B 25 Decimal 27 37

0 ≤ n ≤ 255

= 0

Selects or cancels the user-defined character set. When the Least Significant Bit (LSB) is 0, the user-defined character set is canceled and the internal character

set is enabled. When the LSB is 1, the user-defined character set is selected.

■ When the user-defined character set has been released, the internal character set is specified automatically.

n n n

ETTING COMMAND

RP-U420 Character commands ESC %

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Program Example Program Example (continued)

PRINT #1, CHR$(&H1B);"&";CHR$(2);"AC"; PRINT #1, CHR$(9); FOR i=1 TO 2*9 READ d: PRINT #1, CHR$(d); NEXT i PRINT #1, CHR$(9); FOR i=1 TO 2*9 READ d: PRINT #1, CHR$(d); NEXT i PRINT #1, CHR$(10); FOR i=1 TO 2*10 READ d: PRINT #1, CHR$(d); NEXT i PRINT #1, CHR$(&H1B);"%";CHR$(0); ← Select resident character PRINT #1, "A B C D E"; CHR$(&HA); PRINT #1, CHR$(&H1B);"%";CHR$(1); ← Select user-defined character PRINT #1, "A B C D E"; CHR$(&HA): PRINT #1, CHR$(&H1B);"?";"A"; ← Cancel the user-defined character PRINT #1, "A B C D E"; CHR$(&HA);

DATA &H18,&H00,&H00,&H00,&H3C,&H00,&H00,&H00 DATA &H7E,&H00,&H00,&H00,&H3C,&H00,&H00,&H00 DATA &H18,&H00 DATA &H18,&H00,&H00,&H00,&H24,&H00,&H00,&H00 DATA &H42,&H00,&H00,&H00,&H24,&H00,&H00,&H00 DATA &H18,&H00 DATA &H00,&H00,&H10,&H00,&H20,&H00,&H5F,&H00 DATA &H00,&H00,&H81,&H00,&H00,&H00,&H5F,&H00 DATA &H20,&H00,&H10,&H00

Print Sample

ABCDE ← Characters from resident character set

DE ← Characters from user-defined character set

♦◊×

◊×

DE ← Characters from user-defined character set (cancel one character)

RP-U420 Character commands ESC %

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Character commands

■ ■ ■

ESC &

[Name] [Format]

[Range]

[Default] [Description]

[Notes] ■ Consecutive character codes for multiple characters can be defined in one definition.

Define user-defined characters ASCII ESC &

Hex 1B 26 Decimal 27 38

= 2

32 ≤ c1 ≤ c2 ≤ 126 0 ≤ x ≤ 9 0 ≤ d ≤ 255

c2 – c1

None Defines user-defined characters.

•y specifies the number of bytes in the vertical direction

•

specifies the beginning character code for the definition, and c2 specifies the final code

•x specifies the number of dots in the horizontal direction

•

specifies the defined character data pattern

+ 1

y c1 c2 y c1 c2 y c1 c2 [x1 d1

[

x1 d1

[

x1 d1

... d( ... d( ... d(

)] ... [ )] ... [

)] ... [

xk d1 xk d1

xk d1

... d( ... d(

... d(

)]

ETTING COMMAND

■ "d" is definition data that indicates the pattern for "x" dots in the horizontal direction, starting from the left edge. If "x" does not satisfy dots in the character configuration pattern (9 dots), the remaining dots on the right are spaces.

■ In the definition data, a "1" represents a dot that is to be printed, and a "0" represents a dot that is not to be printed.

■ Only the most significant bit of the second data byte in the vertical direction can be printed.

■ Independent user-defined character definitions are possible for the fonts if the character pattern is

different in the international character sets.

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■ The defined downloaded characters are cleared in the following circumstances:

• When deleted by ESC ?

• When ESC @ is executed

• When a hardware reset is executed or the power is turned off

■ No user-defined characters are defined in the initial state.

■ If any user-defined characters are not defined, the internal character set (built-in) is selected.

■ If ESC R n is executed, the user-defined characters that have been already defined are canceled.

[Example] 7 × 9 font with 2-dot character space

MS B

LSB

MS B

When the dot pattern for code 20H is defined as shown above:

ESC &

yc1c2

X p1p2p3p4p5p6p7p8p9p10p11p12p13p14 Code 1B 26 02 20 20 07 1F 80 20 00 44 00 80 00 44 00 20 00 1F 80 The corresponding bit is 1 when printing and 0 when not printing.

See program and print example for ESC %

ESC %.

ESC %ESC %

RP-U420 Character commands ESC &

LSB

Ver. 1.0

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Bit-image commands

■ ■ ■

ESC

[Name] [Format]

[Range]

[Default] [Description]

✻✻✻✻

Select bit-image mode ASCII ESC ✻

Hex 1B 2A Decimal 27 42

= 16, 17

0 ≤

≤ 255

0 ≤

≤ 3

0 ≤ d ≤ 255

= (

× 256) × 2

None Selects a bit-image mode using m for the number of dots specified by

Mode

16 9-dot single-density 9 108 108 248 2 half dots 17 9-dot double-density 9 216 216 495 1 half dot

m nL nH d1 ... dk m nL nH d1 ... dk m nL nH d1 ... dk

Vertical Direction Max. Number of Dots

and

, as follows:

Min. number of dots in horizontalNumber of Dots Receipt Journal Validation

XECUTING COMMAND

•

specifies the print mode of the bit image

•

and

specify the number of dots of the bit image in the horizontal direction as (

•

indicates the bit-image data

•

specifies the number of bit-image data

[Notes] ■d indicates the bit-image data. Set a corresponding bit to 1 to print a dot or to 0 not to print a dot.

■ If bit-image data and character data are printed on a line, the bottom of the bit image is aligned to the

baseline (the second dot from the bottom) of the built-in internal character.

■ If bit-image data input exceeds the number of dots to be printed on a line, the excess data and the number

of dots of the bit image in the horizontal direction which is specified by printer performs the buffer-full process when the next data is input.

RP-U420 Bit-image commands ESC

✻

and

Ver. 1.0

× 256) dots

, are discarded. Then the

p. 38

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CONFIDENTIAL

■ If an adjacent dot is specified for the bit image in double-density mode (m = 17), the right side of the

adjacent dot is not printed.

■ This command is not affected by print modes (double width or underline).

■ After finishing processing the bit image, the printer returns to normal data processing mode. The next

print starting position is located at the next dot of the last bit-image data.

■ "Dot density in the vertical direction" indicates the dot density in the paper feeding direction, and "Dot

density in the horizontal direction" indicates the direction perpendicular to the paper feeding direction.

■ The bit-image data is developed based on the current print position.

■ If the width set for the printing area is less than the minimum width of the bit-image data to be printed,

the printer performs buffer full printing for the current print line; then the remaining data is printed from the beginning of the next line.

[Example] The relationship between the image data and the dots to be printed is as follows:

Bit image data

67 45 23 01 67 45 23 01

■ ■ ■

HEAD2

HEAD3

HEAD4

HEAD5

HEAD6

HEAD7

HEAD8

Print data

{

TOP HEAD1

Bottom HEAD9

RP-U420 Bit-image commands ESC

✻

Ver. 1.0

p. 39

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CONFIDENTIAL

Program Example Print Sample

d5d3d1 d11d9d7 d17.......d15d13

MSB

LSB

MSB

LSB

d6d4d2 d12d10d8 d18.......d16d14

m=17: GOSUB bitimage9 ← 9-dot double-density END

bitimage9: PRINT #1, CHR$(&H1B);"[";CHR$(m);CHR$(70);CHR$(0); FOR i=1 TO 5 PRINT #1, CHR$(0);CHR$(128);CHR$(1);CHR$(0);CHR$(2);CHR$(0);CHR$(4);CHR$(0); PRINT #1, CHR$(8);CHR$(0);CHR$(16);CHR$(0);CHR$(32);CHR$(0);CHR$(64);CHR$(0); PRINT #1, CHR$(128);CHR$(0);CHR$(64);CHR$(0);CHR$(32);CHR$(0);CHR$(16);CHR$(0); PRINT #1, CHR$(8);CHR$(0);CHR$(4);CHR$(0);CHR$(2);CHR$(0);CHR$(1);CHR$(0); NEXT i PRINT #1, CHR$(&HA); RETURN

RP-U420 Bit-image commands ESC

✻

m=16: GOSUB bitimage9 ← 9-dot single-density

m=16 m=17

Ver. 1.0

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CONFIDENTIAL

Mechanism control commands

ESC <

[Name] [Format]

[Range] [Default] [Description]

Return home ASCII ESC <

Hex 1B 3C Decimal 27 60

None None Detects the home position again; then moves the print head to the standby position.

Program Example

PRINT #1, CHR$(&H1B);"<";

XECUTING COMMAND

RP-U420 Mechanism control commands ESC <

Ver. 1.0

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CONFIDENTIAL

Miscellaneous commands

ESC =

ETTING COMMAND

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ When the printer is disabled, it ignores all data except for real-time commands until it is enabled by this

Select device ASCII ESC =

Hex 1B 3D Decimal 27 61

n n n

1 ≤ n ≤ 3

= 1

Selects the device to which the host computer sends data, using n as follows:

Function

1 Enables printer 2 Enables customer display 3 Enables printer and customer display

command.

Program Example Print Sample

Only printer selected

PRINT #1, CHR$(&H1B);"=";CHR$(1); ← PRINT #1, "AAAAA"; PRINT #1, CHR$(&H1B);"=";CHR$(2); ← PRINT #1, "BBBBB"; PRINT #1, CHR$(&H1B);"=";CHR$(3);← PRINT #1, " CCCCC"; CHR$(&HA);

Only customer display selected

Both printer and customer display selected

RP-U420 Miscellaneous commands ESC =

AAAAA CCCCC

BBBBB

BBBBB CCCCC

Customer Display Sample

Ver. 1.0

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Character commands

ESC ?

ETTING COMMAND

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ If a user-defined character has not been defined for the specified character code, the printer ignores this

See program and print example for ESC %

Cancel user-defined characters ASCII ESC ?

Hex 1B 3F Decimal 27 63

32 ≤ n ≤ 126 None Deletes the user-defined character pattern that corresponds to the specified character code.

•

specifies the character code corresponding to the user-defined character to be canceled

command.

■ After the user-defined character is canceled, the corresponding pattern for the internal character is

printed.

ESC %.

ESC %ESC %

n n n

RP-U420 Character commands ESC ?

Ver. 1.0

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Miscellaneous commands

ESC @

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ The data in the receive buffer is not cleared.

Initialize printer ASCII ESC @

Hex 1B 40 Decimal 27 64

None None Clears the data in the print buffer and resets the printer mode to the mode that was in effect when the power

was turned on.

■ After this command is executed; the printer goes to the following state:

• Both receipt and journal are selected for the print sheet

• The parallel printing mode is canceled if this command is executed

• The print starting position is set to the beginning of a line

XECUTING COMMAND

ETTING COMMAND

Program Example Print Sample

PRINT #1, CHR$(&H1B);"!";CHR$(32); PRINT #1, "AAAAA"; CHR$(&HA); PRINT #1, CHR$(&H1B);"@"; ← Initialize printer PRINT #1, "BBBBB"; CHR$(&HA);

RP-U420 Miscellaneous commands ESC @

AAAAA

BBBBB ← All settings are canceled after ESC @ is executed

Ver. 1.0

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CONFIDENTIAL

Character commands

■ ■ ■

ESC R

[Name] [Format]

[Range] [Default] [Description]

ETTING COMMAND

Select an international character set ASCII ESC R

Hex 1B 52 Decimal 27 82

0 ≤ n ≤ 13

= 0

Selects an international character set n from the following table:

ASCII code

Hex 2324405B5C5D5E607B7C7D 7E

Country

0 U.S.A. # $ @ [ \ ] ^ ` { ¦ } ~ 1France # $à° ç§^` éùè¨ 2 Germany # $ § Ä Ö Ü ^ ` ä ö ü ß 3U.K. £

Dec 3536649192939496123124125126

n n n

$@[ \] ^` { ¦ } ~ 4 Denmark I # $ @ Æ Ø Å ^ ` æ ø å ~ 5Sweden # ¤ЙДЦЕЬйдцеь 6 It aly # $ @ ° \ é ^ ù à ò è ì 7 Spain I 8 Japan # $ @ [ ¥ ] ^ ` { ¦ } ~ 9 No rwa y # ¤ É Æ Ø Å Ü é æ ø å ü 10 Denmark II # $ É Æ Ø Å Ü é æ ø å ü 11Spain II #$á¡ Ñ¿é` í ñóú 12Latin America #$á¡ Ñ¿éüí ñóú 13Korea #$@[W]^`{¦}~

RP-U420 Character commands ESC R

$ @ ¡ Ñ ¿ ^ ` ¨ ñ } ~

Ver. 1.0

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CONFIDENTIAL

[Notes] ■ If ESC R n is executed, the user-defined characters that are defined with ESC & are canceled.

Program Example Print Sample

FOR n=0 TO 10 PRINT #1, CHR$(&H1B);"R";CHR$(n); PRINT #1, "# $ @ [ \ ] ^ ` { ¦ } ~"; CHR$(&HA); NEXT n

# $@[ \]^` { ¦}~← n=0 (Default setting) # $à°ç§^`éùè¨← n=1

n=2

n=4

n=7 n=8

# $§ÄÖÜ ^ `äöüß←

£ $@[\]^`{ ¦ }~← n=3 # $ @ ÆØÅ^` æø å ~ ← # ¤ЙДЦЕЬйдцеь← n=5 # $@° \ й ^ щатим← n=6 Pt $@¡Ñ¿^` ¨ñ}~← # $@[¥ ]^`{¦ }~← # ¤ЙЖШЕЬйжшеь← n=9 # $ ЙЖШЕЬйжшеь← n=10

RP-U420 Character commands ESC R

Ver. 1.0

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Printing paper commands

■ ■ ■

ESC c 0

[Name] [Format]

[Range] [Default] [Description]

Select paper type(s) for printing ASCII ESC c 0

Hex 1B 63 30 Decimal 279948

1 ≤ n ≤ 3, n = 8

= 3

Selects the type of paper for printing, using n as follows:

Bit Off/On Hex Decimal Function

0 Off 00 0 Journal paper roll disabled

On 01 1 Journal paper roll enabled

1 Off 00 0 Receipt paper roll disabled

On 02 2 Receipt paper roll enabled

2 Off 00 0 Reserved

n n n

XECUTING COMMAND

ETTING COMMAND

3 Off 00 0 Validation disabled

On 08 8 Validation enabled

4-7 Off 00 0 Reserved

[Notes] ■ This command is effective only when processed at the beginning of a line.

■ When validation is selected, the printer waits for insertion of a validation sheet.

■ For the validation wait time, use ESC f.

■ The validation waiting state does not cause an offline or busy state.

RP-U420 Printing paper commands ESC c 0

Ver. 1.0

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■ The printer waits for validation insertion until one of the following events occur:

• A validation sheet is inserted

• The wait time set by ESC f has passed

• Hardware reset or power off

• When DLE ENQ 3 is executed

■ When validation is set from enabled to disabled, the printer waits for removal of the validation sheet.

■ When the printer receives DLE ENQ 3 during the validation waiting state, the printing sheet will return

to default (n = 3).

PRINT #1, CHR$(&H1B);"c0";CHR$(1); PRINT #1, "AAAAA"; CHR$(&HA); PRINT #1, CHR$(&H1B);"c0";CHR$(2); PRINT #1, "BBBBB"; CHR$(&HA);

Select paper type (journal)

←

Print on journal

←

Select paper type (receipt)

←

Print on receipt

←

Program Example

Print Sample <receipt> Print Sample <journal>

BBBBB AAAAA

RP-U420 Printing paper commands ESC c 0

Ver. 1.0

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Paper sensor commands

ESC c 3

[Name] [Format]

[Range] [Default] [Description]

Select paper sensor(s) to output paper-end signals ASCII ESC c 3

Hex 1B 63 33 Decimal 279951

0 ≤ n ≤ 255

= 0

Selects the paper sensor(s) to output paper-end signals

• Each bit of n is used as follows:

Bit Off/On Hex Decimal Function

0 Off 00 0 Journal near-end sensor disabled

On 01 1 Journal near-end sensor enabled

1 Off 00 0 Receipt near-end sensor disabled

On 02 2 Receipt near-end sensor enabled

2-7 Off 00 0 Reserved

n n n

ETTING COMMAND

[Notes] ■ The command is available only with a parallel interface and is ignored with a serial interface.

■ When all the sensors are disabled, the paper-end signal always outputs a paper present status.

Program Example

PRINT #1, CHR$(&H1B);"c3";CHR$(1); ← Journal near-end sensor enabled

RP-U420 Paper sensor commands ESC c 3

Ver. 1.0

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Paper sensor commands

ESC c 4

[Name] [Format]

[Range] [Default] [Description]

ETTING COMMAND

Select paper sensor(s) to stop printing ASCII ESC c 4

Hex 1B 63 34 Decimal 279952

0 ≤ n ≤ 255

= 0

Selects the paper sensor(s) to use to stop printing when a paper end is detected, using n as follows:

Bit Off/On Hex Decimal Function

0 Off 00 0 Journal near-end sensor disabled

On 01 1 Journal near-end sensor enabled

1 Off 00 0 Receipt near-end sensor disabled

On 02 2 Receipt near-end sensor enabled

2-7 Off 00 0 Reserved

n n n

[Notes] ■ When all of the following conditions are satisfied, the printer stops printing:

• Paper near-end sensor(s) is enabled

• The applicable sensor(s) detects a paper end

• The print sheet(s) for the applicable sensor(s) is selected

■ If the paper near-end sensor for the print sheet to be disabled detects a paper end, the printer executes paper LED light processing only.

Program Example

PRINT #1, CHR$(&H1B);"c4";CHR$(1); ← Journal near-end sensor enabled

RP-U420 Paper sensor commands ESC c 4

Ver. 1.0

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Panel button command

ESC c 5

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ Only the LSB of n is valid.

Enable/disable panel buttons ASCII ESC c 5

Hex 1B 63 35 Decimal 279953

0 ≤ n ≤ 255

= 0

Enables or disables the receipt/journal feed buttons.

• When the Least Significant Bit (LSB) of n is 0, the receipt/journal feed buttons are enabled

• When the LSB of n is 1, the receipt/journal feed buttons are disabled

■ When the receipt/journal feed buttons are disabled, no buttons on the receipt/journal feed are usable, except in the following case:

• Receipt/journal feed buttons are enabled when the cover is opened

n n n

ETTING COMMAND

PRINT #1, CHR$(&H1B);"c5";CHR$(1); ← Disable panel buttons

RP-U420 Panel button command ESC c 5

Program Example

Ver. 1.0

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CONFIDENTIAL

Print commands

ESC d

[Name] [Format]

[Range] [Default] [Description] [Notes] ■ This command sets the print starting position to the beginning of the line.

PRINT #1, "AAAAA"; CHR$(&HA); PRINT #1, "BBBBB"; CHR$(&H1B);"d";CHR$(6); PRINT #1, "CCCCC"; CHR$(&HA);

Print and feed n lines ASCII ESC d

Hex 1B 64 Decimal 27 100

n n n

0 ≤ n ≤ 255 None Prints the data in the print buffer and feeds n × 4.23 mm {1/6"}.

Program Example Print Sample

AAAAA BBBBB

XECUTING COMMAND

RP-U420 Print commands ESC d

CCCCC

ESC d used to print one line and advance the paper by six lines

Ver. 1.0

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Printing paper commands

ESC f

[Name] [Format]

[Range]

[Default] [Description]

•

• When t1 is set to 0, the printer waits until validation paper is inserted.

[Notes] ■ The setting values for this command are used for validation paper insertion.

Set validation paper waiting time ASCII ESC f

Hex 1B 66 Decimal 27 102

t1 t2 t1 t2 t1 t2

0 ≤ t1 ≤ 15 0 ≤ t2 ≤ 64

= 0, t2 = 10

Sets the time that the printer waits for validation paper to be inserted and the time from insertion of the validation paper to the start of printing.

specifies the wait time for validation paper to be inserted as [t1 × 1] minutes.

•

specifies time from insertion of the validation paper to the start of printing as [t2 × 0.1] seconds.

■ When the waiting time t1 set by this command has passed, even though the validation paper is not detected, the printer ends the validation paper waiting state. Then the printer selects both paper sources—journal and receipt—for printing. If data is in the print buffer, the print data is printed on both journal and receipt paper.

ETTING COMMAND

■ Waits for a validation paper to be inserted when the printer recovers from an error.

Program Example

PRINT #1, CHR$(&H1B);"f";CHR$(15);CHR$(20);

Select paper type

PRINT #1, CHR$(&H1B);"c0";CHR$(4);

←

RP-U420 Printing paper commands ESC f

Ver. 1.0

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Mechanism control commands

ESC o

[Name] [Format]

[Range] [Default] [Description] [Notes] ■ This command is enabled only when processed at the beginning of a line.

PRINT #1,CHR$(&H1B);"c0";CHR$(2); ← Select paper type PRINT #1,CHR$(&H1B);"o"; PRINT #1,CHR$(&H1B);"d";CHR$(13); PRINT #1," AAAAA";CHR$(&HA);

Stamp ASCII ESC o

Hex 1B 6F Decimal 27 111

None None Executes a stamp operation on the receipt.

■ If a receipt is not selected as the paper source, this command is ignored.

Program Example Print Sample

← Stamp

YOUR RECEIPT

Thank you Call again

XECUTING COMMAND

RP-U420 Mechanism control commands ESC o

AAAAA

Ver. 1.0

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Miscellaneous commands

ESC p

[Name] [Format]

[Range]

[Default] [Description]

[Notes] ■ The pulse ON time is [t1 × 2] ms, and the OFF time is [t2 × 2] ms.

Generate pulse ASCII ESC p

Hex 1B 70 Decimal 27 112

= 0, 1, 48, 49

0 ≤ t1 ≤ 255 0 ≤ t2 ≤ 255

None Outputs the pulse specified by t1 and t2 to connector pin m as follows:

0, 48 Drawer kick-out connector pin 2 1, 49 Drawer kick-out connector pin 5

■ When t2 < t1, the printer processes t1 × 2 ms as the OFF time.

Function

m t1 t2 m t1 t2 m t1 t2

XECUTING COMMAND

Program Example

PRINT #1, CHR$(&H1B);"p";CHR$(0);CHR$(25);CHR$(250);

RP-U420 Miscellaneous commands ESC p

Ver. 1.0

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CONFIDENTIAL

Character commands

■ ■ ■

ESC t

[Name] [Format]

[Range] [Default] [Description]

Select character code table ASCII ESC t

Hex 1B 74 Decimal 27 116

0 ≤

nnnn

≤≤≤≤ 5, 16 ≤

= 0

Selects a page n from the character code table.

0 PC437 (U.S.A., Standard Europe) 1 Katakana 2 PC850 (Multilingual) 3 PC860 (Portuguese) 4 PC863 (Canadian-French) 5 PC865 (Nordic)

Character Code Table

nnnn

≤≤≤≤ 19, 254 ≤

n n n

nnnn

≤≤≤≤ 255

ETTING COMMAND

16 WPC1252 17 PC866 (Cyrillic2) 18 PC852 (Latin 2) 19 PC858 (Euro) 254 PC857 (Latin 5) 255 Space page

See character code tables.

RP-U420 Character commands ESC t

Ver. 1.0

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Program Example Print Sample

PRINT #1, CHR$(&H1B);"t";CHR$(0); ← Select page 0 GOSUB printing PRINT #1, CHR$(&H1B);"t";CHR$(1); ← Select page 1 GOSUB printing END

printing: FOR i=&H20 TO &H7F PRINT #1, CHR$(i); NEXT i PRINT #1, CHR$(&HA); FOR i=&H80 TO &HFF PRINT #1, CHR$(i); NEXT i PRINT #1, CHR$(&HA); RETURN

Page 0

Page 1

RP-U420 Character commands ESC t

Ver. 1.0

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CONFIDENTIAL

Character commands

■ ■ ■

ESC z

[Name] [Format]

[Range] [Default]

[Description]

[Notes] ■ Only the lowest bit of n is enabled.

Turn parallel printing mode on/off for receipt and journal ASCII ESC z

Hex 1B 7A Decimal 27 122

0 ≤ n ≤ 255

= 1 (when DIP switch 1-8 is ON: Taiwan mode)

= 0 (when DIP switch 1-8 is OFF: standard mode)

Turns parallel printing mode for receipt and journal on or off. When parallel printing mode is turned on, the printer prints the same data on both receipt and journal paper.

• When the Least Significant Bit (LSB) of n is 0, turns off parallel printing mode

• When the LSB of n is 1, turns on parallel printing mode

■ This command is enabled only when input at the beginning of a line.

■ This command affects printing only when both print sources—journal and receipt—are selected for

printing.

■ When the parallel printing mode is turned off, the printing area can be developed for receipt and journal. The first column in the print buffer is printed on the receipt. The print starting position moves to the first column of the journal in the following case.

n n n

ETTING COMMAND

• When RS is executed

• When buffer full is processed at the end of the printing area on the receipt

(The data that causes the buffer full is printed on the first column of the journal)

RP-U420 Character commands ESC z

Ver. 1.0

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PRINT #1, CHR$(&H1B);"c0";CHR$(3); ←Select paper types (receipt and journal) PRINT #1, "AAAAAAAAAAAAAAAAAAAA"; PRINT #1, "BBBBBBBBBBBBBBBBBBBB";CHR$(&HA); PRINT #1, CHR$(&H1B);"z";CHR$(1); ←Turn on parallel printing mode PRINT #1, "CCCCCCCCCCCCCCCCCCCC"; PRINT #1, "DDDDDDDDDDDDDDDDDDDD";CHR$(&HA);

Print Sample <Receipt> Print Sample <Journal>

AAAAAAAAAAAAAAAAAAAABBBBBBBBBB BBBBBBBBBB CCCCCCCCCCCCCCCCCCCCDDDDDDDDDD CCCCCCCCCCCCCCCCCCCCDDDDDDDDDD DDDDDDDDDD DDDDDDDDDD

Program Example

RP-U420 Character commands ESC z

Ver. 1.0

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Kanji commands

FS &

ETTING COMMAND

[Name] [Format]

[Description] Selects Kanji character mode.

[Notes] ■ When the Kanji character mode is selected, the printer checks whether the code is for Kanji or not, then

Select Kanji character mode ASCII FS &

Hex 1C 26 Decimal 28 38

• Kanji character mode is selected when DIP switch 1-8 is ON (Taiwan mode).

• Kanji character mode is canceled when DIP switch 1-8 is OFF (standard mode).

processes 1-byte character, which has the same code as the first byte and the second byte if the code is for Kanji.

■ Kanji character mode should be selected when the power is turned on.

■ The printer supports the subset of the Big5 code system (Chinese font: 13053 characters) for Kanji

character printing. If the printer processes a Kanji code that is not supported, the printer prints a space character.

Program Example Print Sample

PRINT #1, CHR$(&H1C);”C”;CHR$(0); ← Select JIS code system PRINT #1, CHR$(&H1C);”&”; ← Specify Kanji mode PRINT #1, CHR$(&H34);CHR$(&H41); PRINT #1, CHR$(&H3B);CHR$(&H7A); CHR$(&HA);

RP-U420 Kanji commands FS &

Ver. 1.0

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Kanji commands

FS .

ETTING COMMAND

[Name] [Format]

[Description]

[Notes] ■ When the Kanji character mode is not selected, all character codes are processed one byte at a time as

PRINT #1, CHR$(&H1C);”C”;CHR$(0); ← Select JIS code system PRINT #1, CHR$(&H1C);”&”; ← Specify Kanji mode PRINT #1, CHR$(&H34);CHR$(&H41); PRINT #1, CHR$(&H3B);CHR$(&H7A); CHR$(&HA); PRINT #1, CHR$(&H1C);”.”; ← Cancel Kanji mode PRINT #1, “kanji”; CHR$(&HA);

Cancel Kanji character mode ASCII FS .

Hex 1C 2E Decimal 28 46

Cancels Kanji character mode.

• Kanji character mode is selected when DIP switch 1-8 is ON (Taiwan mode).

• Kanji character mode is canceled when DIP switch 1-8 is OFF (standard mode).

ASCII code.

■ Kanji character mode is initialized to default when the power is turned on, when ESC @ is executed.

Program Example Print Sample

RP-U420 Kanji commands FS .

Ver. 1.0

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Miscellaneous commands

■ ■ ■

GS I

[Name] [Format]

[Range] [Default] [Description]

Transmit printer ID ASCII GS I

Hex 1D 49 Decimal 29 73

1 ≤ n ≤ 3, 49 ≤ n ≤ 51, 65 ≤ n ≤ 67, n = 69 None Transmits the printer ID specified by n as follows:

1, 49 Model ID <2C>H 2, 50 Type ID See the table on the next page. 3, 51 Firmware version ID Depends on firmware version.

65 Firmware version Depends on firmware version.

Printer ID Contents

n n n

Example: <02>H

Example: <5F>H, “2.00”, <00>H

XECUTING COMMAND

66 Manufacturer <5F>H, “EPSON”, <00>H 67 Model name <5F>H, “RP-U420”, <00>H 69 Supporting Kanji type <5F>H, “TAIWAN BIG5 ”, <00>H

RP-U420 Miscellaneous commands GS I

Ver. 1.0

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= 2: Type ID

Bit Off/On Hex Decimal Function

0 On 01 1 Two-byte character code supported. 1 Off 00 0 Manual cutter installed.

On 02 2 Autocutter installed. 2 Off 00 0 Reserved 3 Off 00 0 Reserved 4 Off 00 0 Not used. Fixed to Off 5 Off 00 0 Reserved 6 Off 00 0 Reserved 7 Off 00 0 Not used. Fixed to Off

[Notes] ■ The printer transmits the status after confirming the host is ready to receive data. If the host computer is

not ready to receive data, the printer waits until the host becomes ready.

■ When the parameter (1 ≤ n ≤ 3) or (49 ≤ n ≤ 51) is specified, the printer transmits one byte code.

■ When the parameter (65 ≤ n ≤ 67) or (n = 69) is specified, the printer transmits following data string.

(1) Header (<5F>H) (2) Printer information (multiple bytes) (3) Terminator (<00>H)

PRINT #1, CHR$(&H1D);"I";CHR$(1);← Transmits printer ID

RP-U420 Miscellaneous commands GS I

Program Example

Ver. 1.0

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Mechanism control commands

■ ■ ■

GS V

[Name] [Format]

[Range]

[Default] [Description]

XECUTING COMMAND

Feed paper to the cutting position and cut it ➀ ASCII GS V

Hex 1D 56 Decimal 29 86

➁ ASCII GS V

Hex 1D 56 Decimal 29 86

➀ 0 ≤ m ≤ 2, 48 ≤ m ≤ 50 ➁ 65 ≤ m ≤ 67, 0 ≤ n ≤ 255

None Cuts a receipt.

• When DIP switch 1-7 is OFF (autocutter installed), m specifies the paper cutting operation as follows:

Printer Operation Mode

0, 48, 1, 49 Cut (one point left uncut) Cut (one point left uncut) 2, 50 Cut (three points left uncut) Cut (three points left uncut)

Standard Mode Taiwan Mode

m m m

n n n

65, 66 Feed receipt paper ((8 + n) × 4.23 mm),

then cut (one point left uncut).

67 Feed receipt paper ((8 + n) × 4.23 mm),

then cut (three points left uncut).

RP-U420 Mechanism control commands GS V

If only receipt is selected as the printing sheet, feed receipt paper to the preprint black mark position, then cut (one point left uncut).

If both receipt and journal are selected as the printing sheets, journal paper is also fed to the preprint black mark position.

If on ly receipt is selected as the printing sheet, feed receipt paper to the preprint black mark position, then cut (three points left uncut).

If both receipt and journal are selected as the printing sheets, journal paper is also fed to the preprint black mark position.

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• When DIP switch 1-7 is ON (manual cutter installed), m specifies the paper cutting operation as follows:

Printer Operation Mode

0, 48, 1, 49 No operation No operation 2, 50 No operation No operation

Standard Mode Taiwan Mode

65, 66 Only feed receipt paper

((10 + n) × 4.23 mm).

Only feed receipt paper to the preprint black mark position. If both receipt and journal are selected as the printing sheets, journal

paper is also fed to the preprint black mark position.

67 Only feed receipt paper

((10 + n) × 4.23 mm).

Only feed receipt paper to the preprint black mark position. If both receipt and journal are selected as the printing sheets, journal

paper is also fed to the preprint black mark position.

•

specifies the paper feeding amount before cutting a paper.

[Notes] ■ This command is effective only when processed at the beginning of a line.

■ This command is ignored when receipt is not selected as the printing sheet by ESC c 0.

[Notes for ➁] ■ In Taiwan mode, parameter n has no meaning.

■ For autocutter installed model, (8 × 4.23) mm is the optimal paper feed amount for cutting just under the

last printed line.

■ For manual cutter installed model, (10 × 4.23) mm is the optimal paper feed amount for cutting just under

the last printed line.

Program Example Print Sample

PRINT #1, CHR$(&H1B);"c0";CHR$(2); ← Select paper type PRINT #1, " AAAAA"; CHR$(&HA); PRINT #1, CHR$(&H1D);"V";CHR$(66);CHR$(0); ←

Feed paper and cut

RP-U420 Mechanism control commands GS V

AAAAA

Paper fed to the cutting position and partial cut (one point left uncut) performed

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Status commands

■ ■ ■

GS r

XECUTING COMMAND

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ The printer transmits the status after confirming the host is ready to receive data. If the host computer is

Transmit status ASCII GS r

Hex 1D 72 Decimal 29 114

= 1, 2, 49, 50 None Transmits the status specified by n, as follows:

1, 49 Transmits paper sensor status 2, 50 Transmits drawer kick-out connector status

not ready to receive data, the printer waits until the host becomes ready.

■ The status types to be transmitted are shown below:

Paper sensor status (n = 1, 49)

Function

n n n

Bit Off/On Hex Decimal Function

0 Off 00 0 Journal paper near-end sensor: paper present

On 01 1 Journal paper near-end sensor: paper near end

1 Off 00 0 Receipt paper near-end sensor: paper present

On 02 2 Receipt paper near-end sensor: paper near end 2, 3 Off 00 0 Reserved 4 Off 00 0 Fixed

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Bit Off/On Hex Decimal Function

5 Off 00 0 Validation sensor: paper present

On 20 32 Validation sensor: paper not present 6 Off 00 0 Reserved 7 Off 00 0 Fixed

Drawer kick-out connector status (n = 2, 50)

Bit Off/On Hex Decimal Function

0 Off 00 0 Drawer kick-out connector pin 3 is LOW

On 01 1 Drawer kick-out connector pin 3 is HIGH 1,2,3 Off 00 0 Reserved 4Off 000 Fixed 5,6 Off 00 0 Reserved 7Off 000 Fixed

PRINT #1, CHR$(&H1D);"r";CHR$(1); ← Transmits paper sensor status

RP-U420 Status commands GS r

Program Example for all printers

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Status commands

■ ■ ■

DLE EOT

[Name] [Format]

[Range] [Default] [Description]

XECUTING COMMAND

Real-time status transmission ASCII DLE EOT

Hex 10 04 Decimal 16 4

1 ≤ n ≤ 4, 6 None Transmits the selected printer status specified by n in real-time, according to the following parameters:

= 1: Transmit printer status

= 2: Transmit offline status

= 3: Transmit error status

= 4: Transmit paper roll sensor status

= 6: Transmit validation status

•

= 1: Printer status

Bit Off/On Hex Decimal Function

0 Off 00 0 Not used. Fixed to Off. 1 On 02 2 Not used. Fixed to On. 2 Off 00 0 Drawer open/close signal is LOW (connector pin 3).

On 04 4 Drawer open/close signal is HIGH (connector pin 3).

3 Off 00 0 Online.

On 08 8 Offline. 4 On 10 16 Not used. Fixed to On. 5 Off 00 0 Reserved. Fixed to Off. 6 Off 00 0 No panel switch is pressed.

On 40 64 One of panel switch is pressed. 7 Off 00 0 Not used. Fixed to Off.

n n n

Bit 6: Even if panel switch is disabled by ESC c 5, bit6 becomes “On” during one of panel switch is pressed.

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•

= 2: Offline status

Bit Off/On Hex Decimal Function

0 Off 00 0 Not used. Fixed to Off. 1 On 02 2 Not used. Fixed to On. 2 Off 00 0 Cover is closed.

On 04 4 Cover is open. 3 Off 00 0 Paper is not being fed by using the FEED button.

On 08 8 Paper is being fed by the FEED button. 4 On 10 16 Not used. Fixed to On. 5 Off 00 0 No paper end stop.

On 20 32 Printing is being stopped due to paper end. 6 Off 00 0 No error.

On 40 64 Error occurs. 7 Off 00 0 Not used. Fixed to Off.

•

= 3: Error status

Bit Off/On Hex Decimal Function

0 Off 00 0 Not used. Fixed to Off. 1 On 02 2 Not used. Fixed to On. 2 Off 00 0 No mechanical error.

On 04 4 Mechanical error occurs. 3 Off 00 0 No autocutter error.

On 08 8 Autocutter error occurs. 4 On 10 16 Not used. Fixed to On. 5 Off 00 0 No unrecoverable error.

On 20 32 Unrecoverable error occurs. 6 Off 00 0 No print head temperature error.

On 40 64 Print head temperature error occurs. 7 Off 00 0 No mark sensor error.

On 80 128 Mark sensor error occurs.

■ ■ ■

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Bit 2: This bit becomes “On” when home position detecting error or main motor lock-up error is occurs. Bit 7: When serial interface model and 7 bit data word length selected, this bit can not be transferred to

the host. Bit 7 is different from the ESC/POS Specification.

•

= 4: Paper roll sensor status

Bit Off/On Hex Decimal Function

0 Off 00 0 Not used. Fixed to Off. 1 On 02 2 Not used. Fixed to On. 2 Off 00 0 Journal paper roll is not near end.

On 04 4 Journal paper roll near end is detected. 3 Off 00 0 Receipt paper roll is not near end.

On 08 8 Receipt paper roll near end is detected. 4 On 10 16 Not used. Fixed to On. 5 Off 00 0 Journal mark sensor does not detect black mark.

On 20 32 Journal mark sensor is detecting black mark. 6 Off 00 0 Receipt mark sensor does not detect black mark.

On 40 64 Receipt mark sensor is detecting black mark. 7 Off 00 0 Not used. Fixed to Off.

■ ■ ■

Bits 5 and 6 are different from the ESC/POS Specification.

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•

= 6: Validation status

Bit Off/On Hex Decimal Function

0 Off 00 0 Not used. Fixed to Off. 1 On 02 2 Not used. Fixed to On. 2 Off 00 0 Validation is not selected.

On 04 4 Validation is selected. 3 Off 00 0 Not validation insertion waiting state.

On 08 8 Within validation insertion waiting state. 4 On 10 16 Not used. Fixed to On. 5 Off 00 0 Validation sensor does not detect paper.

On 20 32 Validation sensor is detecting paper. 6 Off 00 0 Reserved. Fixed to Off. 7 Off 00 0 Not used. Fixed to Off.

[Notes] ■ The status is transmitted whenever the data sequence of <10>H <04>H <n>

(1 ≤ n ≤ 4 or 6) is received. Example:

In ESC *

m nL nH d1...dk, d1

=<10>H, d2=<04>H, d3=<01>H

■ ■ ■

■ This command should not be used within the data sequence of another command that consists of 2 or more bytes.

Example: If you attempt to transmit ESC ! n to the printer, but DTR (DSR for the host computer) goes to MARK before n is transmitted and then DLE EOT 3 interrupts before n is received, the code <10>H for DLE EOT 3 is processed as the code for ESC ! <10>H.

■ Even though the printer is not selected using ESC = (select peripheral device), this command is effective.

■ The printer transmits the current status. Each status is represented by one-byte data.

■ The printer transmits the status without confirming whether the host computer can receive data.

■ The printer executes this command upon receiving it.

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■ With a serial interface model, this command is executed even when the printer is offline, the receive buffer is full, or there is an error status.

■ With a parallel interface model, the printer cannot receive data when it is busy; therefore this command cannot be used under the following conditions.

• When DIP Switch 1-6 is On: receive buffer-full.

• When DIP Switch 1-6 is Off: receive buffer-full, offline, error status.

PRINT #1, CHR$(&H10);CHR$(&H4);CHR$(2); ← Transmits offline status

Program Example

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Miscellaneous commands

■ ■ ■

DLE ENQ

[Name] [Format]

[Range] [Default] [Description]

[Notes] ■ The printer executes this command upon receiving this command.

Real-time request to printer ASCII DLE ENQ

Hex 10 05 Decimal 16 5

1 ≤ n ≤ 3 None Responds to a request from the host specified by n. The operations performed depend on the value of n, as

follows:

= 1: Recover from an error and restart printing from the line where the error occurred.

= 2: Clear the receive and print buffers and recover from an error.

= 3: Cancel waiting for validation.

■ With a serial interface model, this command is executed even in the offline, receive buffer-full, or error states.

■ With a parallel interface model, the printer cannot receive data when it is busy; therefore this command cannot be used under the following conditions.

n n n

XECUTING COMMAND

• When DIP Switch 1-6 is On: receive buffer-full.

• When DIP Switch 1-6 is Off: receive buffer-full, offline, error states.

■ This command is executed any time the data sequence <10>H<05>H<n> (1 ≤ n ≤ 3) is received, even if it appears as part of another command.

<Example> In ESC *

■ This command should not be used within the data sequence of another command that consists of two or more bytes.

<Example> If you attempt to transmit ESC ! n to the printer, but DLE ENQ 3 interrupts before n is received, the code <10>H for DLE ENQ 3 is processed as the code for ESC ! <10>H.

m nL nH d1 ... dk, d1

=<10>H, d2=<05>H, d3=<1>

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■ DLE ENQ 1 restarts printing from the line where the error occurred. This command is available only for recoverable errors other than a print head temperature error.

■ DLE ENQ 2 enables the printer to recover from an error after clearing the data in the receive and print buffers. The printer retains the settings (from ESC!, ESC R, for example) that were in effect when the error occurred. Using DLE ENQ 2 and ESC @, the printer can be completely initialized. DLE ENQ 2 is available only for recoverable errors other than a print head temperature error.

■ The printer selects both receipt and journal as the print sheet after recovering from an error by using DLE ENQ 2.

■ DLE ENQ 3 is available only when the printer is waiting for the insertion of validation paper and is ignored in other states. After the printer is released from the cut sheet waiting state, both receipt and journal are selected as the print sheet.

■ When the cut sheet waiting state is canceled by DEL ENQ 3, the data in the receive and print buffers is cleared.

■ DLE ENQ 1 and DLE ENQ 2 are enabled, even if the printer is canceled by ESC =.

Program Example

PRINT #1, CHR$(&H10);CHR$(&H5);CHR$(2);

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Miscellaneous commands

■ ■ ■

DLE DC4

[Name] [Format]

[Range]

[Default] [Description]

[Notes] ■ The printer executes this command upon receiving this command.

Generate pulse at real-time ASCII DLE DC4

Hex 10 14 Decimal 16 20

= 1

0 ≤ m ≤ 1 1 ≤ t ≤ 8

None Outputs the pulse specified by t to connector pin m as follows:

Function

0 Drawer kick-out connector pin 2 1 Drawer kick-out connector pin 5

• The pulse ON time is [t × 100] ms, and the OFF time is [t × 100] ms.

nmt nmt nmt

XECUTING COMMAND

■ This comand cannot be executed when the unrecoverable error occurs.

■ With a serial interface model, this command is executed even when the printer is offline, the receive buffer

is full, or there is an error status.

■ With a parallel interface model, the printer cannot receive data when it is busy; therefore this command cannot be used under the following conditions.

• When DIP Switch 1-6 is On: receive buffer-full.

• When DIP Switch 1-6 is Off: receive buffer-full, offline, error status.

■ This command is executed any time the data sequence <10>H<14>H<n><m> <0> is received, even if it appears as part of another command.

<Example> In ESC *

m nL nH d1 ... dk, d1

=<10>H, d2=<14>H, d3=<1>,d4=<0>, d5=<5>

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■ This command should not be used within the data sequence of another command that consists of two or more bytes.

<Example> If you attempt to transmit ESC ! n to the printer, but DLE DC4 105 interrupts before n is received, the code <10>H for DLE DC4 is processed as the code for ESC ! <10>H.

■ This command is enabled even when the printer is not selected by ESC =.

■ If the printer receives this command during outputting pulse required by ESC p or DLE DC4 to the same

connector pin, this command will be ignored.

■ If the printer receives this command during outputting pulse required by ESC p or DLE DC4 to another connector pin, this command will be queued and executed afterward.

PRINT #1, CHR$(&H10);CHR$(&H14);CHR$(1)l;CHR$(0);CHR$(5);

Program Example

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Epson RP-U420 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Usable application programs and tips

Definitions

Character code tables