Samsung SRP-350 User Manual

SRP-350 Ver.2

RECEIPT PRINTER

Operator’s Manual

All specifications are subjected to change without notice

http://www.samsungminiprinters.com

Safety Precautions

In using the present appliance, please keep the following safety
regulations in order to prevent any hazard or material damage.

WARNING

Violating following instructions can cause serious injury or death.

Do not plug several products in one
multi-outlet.

This can provoke over-heating and a fire.
If the plug is wet or dirty, dry or wipe it

before usage.

If the plug does not fit perfectly with the

outlet, do not plug in.

Be sure to use only standardized

multi-outlets.

PROHIBITE

Do not pull the cable to unplug.

This can damage the cable, which is the

origin of a fire or a breakdown of the printer.

PROHIBITE

Do not plug in or unplug with your hands
wet.

You can be electrocuted.

PROHIBITE

Do not bend the cable by force or leave it
under any heavy object.

A damaged cable can cause a fire.

PROHIBITE

You must use only the supplied adapter.

It is dangerous to use other adapters.

ONLY SUPPLIED ADAPTER

Keep the plastic bag out of children’s reach.

If not, a child may put the bag on his head.

PROHIBITE

If you observe a strange smoke, odor or
noise from the printer, unplug it before
taking following measures.

Switch off the printer and unplug the set from

the mains.

After the disappearance of the smoke, call

your dealer to repair it.

TO UNPLUG

PRINTER

1

WARNING

Violating following instructions can cause slight wound or damage the

appliance.

Keep the desiccant out of children’s
reach.

If not, they may eat it.

PROHIBITE

Use only approved accessories and do
not try to disassemble, repair or remodel
it for yourself.

Call your dealer when you need these

services.

DISASSEMBLING
PROHIBITED

Do not let water or other foreign objects
in the printer.

If this happened, switch off and unplug the

printer before calling your dealer.

PROHIBITE

PRINER

PRINTER

Install the printer on the stable surface.

If the printer falls down, it can be broken

and you can hurt yourself.

PROHIBITE

Do not touch the HEAD of printer with
your hand.

This can burn your hand or deteriorate

printing quality.

PRINTER

HEAD

PROHIBITE

Do not use the printer when it is out of
order. This can cause a fire or an
electrocution.

Switch off and unplug the printer before

calling your dealer.

TO UNPLUG

PRINTER

DEALER

Warning - U.S.

This equipment has been tested and found to comply with the limits for a Class A digital
device pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.

Notice - Canada

This Apparatus complies with class “A” limits for radio interference as specified in the
Canadian department of communications radio interference regulations.

Get appareil est conforme aux normes class “A” d’interference radio tel que specifier par
ministre canadien des communications dans les reglements d’interference radio.

Caution

Some semiconductor devices are easily damaged by static electricity. You should turn the
printer “OFF”, before you connect or remove the cables on the rear side, in order to guard
the printer against the static electricity. If the printer is damaged by the static electricity,
you should turn the printer “OFF”.

INTRODUCTION

The SRP-350, SRP-350S, SRP-350P and SRP-350U Roll Printer are designed for use with
electronic instruments such as system ECR, POS, banking equipment, computer peripheral
equipment, etc.

The main features of the printer are as follows:

1. High speed printing : 35.5(1/6” Feed) lines per second.

2. Low noise thermal printing.

3. RS-232(SRP-350), RS-485(SRP-350S), Parallel(SRP-350P),
USB(SRP-350U)

4. The data buffer allows the unit to receive print data even during printing.

5. Peripheral units drive circuit enables control of external devices such as
cash drawer.

6. Characters can be scaled up to 64 times compared to it’s original size.

7. Bar code printing is possible by using a bar code command.

8. Different print densities can be selected by DIP switches.

Please be sure to read the instruction in this manual carefully before using your new
SRP-350/SRP-350P.

NOTE : The socket-outlet shall be near the equipment and it
shall be easy accessible.

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3

Table of Contents

CHAPTER 1. SETTING UP THE PRINTER ..................................... 5

UNPACKING .............................................................................. 5

1-1.

CONNECTING THE CABLES ............................................................. 6

1-2.

CONNECTING THE COMPUTER ......................................................... 7

1-3.

CONNECTING THE DRAWER ........................................................... 7

1-4.

CONNECTING THE POWER SUPPLY ................................................... 8

1-5.

INSTALLING OR REPLACING THE PAPER ROLL...................................... 9

1-6.

ADJUSTMENTS AND SETTINGS ...................................................... 11

1-7.

USING THE PRINTER.................................................................. 12

1-8.

CHAPTER 2. HEXADECIMAL DUMPING ..................................... 15

CHAPTER 3. THE SELF TEST ...................................................... 16

CHAPTER 4. CODE TABLE.......................................................... 17

CHAPTER 5. CONTROL COMMANDS LIST.................................. 25

APPENDIX ................................................................................. 50

STAR MODE COMMAND SUMMARY .................................................... 50

A.

CONNECTORS ............................................................................. 53

B.

RS-232C Cable Connector ......................................................... 54

Interface Connector.................................................................. 55

Drawer Connector .................................................................... 57

C. NOTES ..................................................................................... 57

SPECIFICATION........................................................................... 58

D.

Chapter 1. Setting Up the Printer

1-1. Unpacking

Your printer box should include these items. If any items are damaged or missing,
please contact your dealer for assistance.

###########

SRP-350/350P Cover Cable

Roll Paper Operator’s manual AC Adapter Power Code

4

5

1-2. Connecting the Cables

You can connect up the three cables to the printer. They all connect to the connector
panel on the back of the printer, which is shown below:

1-3. Connecting the computer

You need an appropriate interface cable.

1. Plug the cable connector securely into the printer’s interface connector.

2. Tighten the screws on both sides of the cable connector.

Notes : Before connecting any of the cables, make sure that both the printer and the
host are turned off.

3. Attach the other end of the cable to the computer.

1-4. Connecting the Drawer

WARNING:

Use a drawer that matches the printer specification. Using an improper drawer may
damage the drawer as well as the printer.

CAUTION:

Do not connect a telephone line to the drawer kick-out connector; otherwise the
printer and the telephone line may be damaged.

Plug the drawer cable into the drawer kick-out connector on the back of the printer
next to the power supply connector.

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7

1-5. Connecting the Power Supply

CAUTIONS:

When connecting or disconnecting the power supply from the printer, make sure that

the power supply is not plugged into an electrical outlet. Otherwise you may damage
the power supply or the printer.

If the power supply’s rated voltage and your outlet’s voltage do not match, contact

your dealer for assistance. Do not plug in the power cord. Otherwise, you may damage
the power supply or the printer.

1. Make sure that the printer’s power switch is turned off, and the power supply’s
power

cord is unplugged from the electrical outlet.

2. Check the label on the power supply to make sure that the voltage required by the
power supply matches that of your electrical outlet.

3. Plug in the power supply’s cable as shown below. Notice that the flat side of the
plug faces down.

1-6. Installing or Replacing the Paper Roll

Notes : Be sure to use paper rolls that meet the specifications. Do not use paper

rolls that have the paper glued to the core because the printer cannot
detect the paper end correctly.

1. Make sure that the printer is not receiving data; otherwise, data may be lost.

2. Open the paper roll cover by pressing the cover-open button.

Notes : To remove the DC cable connector, make sure that the power supply’s power
cord is unplugged; then grasp the connector at the arrow and pull it straight out.

8

Notes : Do not open the print cover while the printer is operating.
This may damage the printer.

3. Remove the used paper roll core if there is one.

4. Insert the paper roll as shown.

9

5. Be sure to note the correct direction that the paper comes off the roll.

pap

g

6. Pull out a small amount of paper, as shown. Then close the cover.

1-7. Adjustments and Settings

The SRP-350 is set up at the factory to be appropriate for almost all
users. It does, however, offer some settings for users with special
requirements.

It has DIP switches that allow you to change communication settings,
such as handshaking and parity check, as well as print density.

The SRP-350 also has a near-end sensor for the paper. This can give
you a warning when the paper is almost out. If you find that there is
not enough paper remaining on the roll when the near-end sensor is
triggered, you can change the near-end sensor setting. Rotate the
near end sensor tab at front or rear position.(See the below figure)

Notes : When closing the cover, press the center of printer cover firmly to prevent

er miss-loadin

7. Tear off the paper as shown.

10

11

1-8. Using the Printer

Control Panel

Button

The button can be disabled by the ESC c 5 command.

Press the FEED button once to advance paper one line. You can also hold down the
FEED button to feed paper continuously.

Panel lights

POWER
The POWER light is on whenever the printer is on.

ERROR
This indicates an error.

PAPER OUT
This light indicates the near end of the paper roll. Install a new paper roll and the

printer Will continue printing.

When the light blinks, it indicates the self-test printing standby state or macro

execution Standby state when the macro execution command is used.

Serial Interface(RS-232C, RS-485) Specification

DIP Switch Set 1 Functions

SW FUNCTION ON OFF DEFAULT

1 Auto Line Feed Always

2 Reserved - - OFF
3 Handshaking XON/OFF DTR/DSR OFF
4 Word length 7 bits 8 bits OFF
5 Parity check Yes No OFF
6 Parity selection EVEN ODD OFF

Baud rate selection Refer to the Following Table

7 ON
8

Enabled

Transmission speed SW – 7 SW – 8

2400 baud ON ON
4800 baud OFF ON
9600 baud ON OFF

19200 baud OFF OFF

Baud rate selection

Dip Switch Set 2 Functions

SW FUNCTION ON OFF DEFAULT

1 Emulation STAR EPSON OFF
2 Reserved - - ­3 Reserved - -
4 Reserved - -

Select Print Density Refer to the Following Table

5 OFF
6
7 Reserved - - ­8 Reserved - - -

Print Density SW - 5 SW – 6

1 ( Light ) ON ON

2 OFF OFF
3 ON OFF

4 ( Dark ) OFF ON

Print Density

Always

Disabled

OFF

OFF

OFF

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13

Parallel/USB Interface Specification

Dip Switch Set 1 Functions

SW FUNCTION ON OFF DEFAULT

1 Auto Line Feed Always

2 Reserved - - OFF
3 Reserved - - OFF
4 Reserved - - OFF
5 Reserved - - OFF
6 Reserved - - OFF
7 Reserved - - OFF
8 Reserved - - OFF

Enabled

Dip Switch Set 2 Functions

SW FUNCTION ON OFF DEFAULT

1 Emulation STAR EPSON OFF
2 Reserved - - ­3 Reserved - -
4 Reserved - -

Select Print Density Refer to the Following Table

5 OFF
6
7 Reserved - - ­8 Reserved - - -

Print Density SW - 5 SW – 6

1 ( Light ) ON ON

2 OFF OFF
3 ON OFF

4 ( Dark ) OFF ON

Print Density

Always

Disabled

OFF

OFF

Chapter 2. Hexadecimal Dumping

This feature allows experienced users to see exactly what data is coming to the printer.
This can be useful in finding software problems. When you turn on the hexadecimal dump
function, the printer prints all commands and data in hexadecimal format along with a
guide section to help you find specific commands.

To use the hexadecimal dump function, follow these steps:

1. After you make sure that the printer is off, open the cover.

2. Turn on the printer, while holding down the FEED button.

3. Close the cover, then the printer enters the hexadecimal dump mode.

4. Run any software program that sends data to the printer. The printer will print all the

codes it receives in a two-column format. The first column contains the hexadecimal

codes and the second column gives the ASCII characters that corresponds to the

codes.

1B 21 00 1B 26 02 40 40 40 40 . ! . . & . @ @ @ @

02 0D 1B 44 0A 14 1E 28 28 28 . . . D . . . . ( ( (

00 01 0A 41 0D 42 0A 43 43 43 . . . A . B . C C C

z A period (.) is printed for each code that has no ASCII equivalent.

z During the hex dump, all commands except DLE EOT and DLE ENQ are

disabled.

5. When the printing finishes, turn off the printer.

6. Turn on the printer and then the hexadecimal mode is off.

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15

Chapter 3. The self test

The self-test checks whether the printer has any problems. If the printer does not function
properly, contact your dealer. The self-test checks the following;

1. Make sure paper roll has been installed properly.

2. Turn on the power while holding down the FEED button. The self-test begins.

3. The self-test prints the current printer status, which provides the control ROM version

and the DIP switch setting.

4. After printing the current printer status, self-test printing will print the following, and

pause (The PAPER LED light blinks).

Self-test printing.
Please press the FEED button

5. Press the FEED button to continue printing. The printer prints a pattern using the

built-in character set.

6. The self-test automatically ends and cuts the paper after printing the following.

*** COMPLETED ***

The printer is ready to receive data as soon as it completes the self-test.

Chapter 4. Code Table

The following pages show the character code tables. To find the character corresponding
to a hexadecimal number, count across the top of the table for the left digit and count
down the left column of the table for the right digit. For example, 4A = J.

Page 0 ( PC437 : USA, Standard Europe)

( International Character Set : USA )

16

17

Page 2 ( PC850 : Multilingual )

Page 3 ( PC860 : Portuguese )

18

19

Page 4 ( PC 863 : Canadian - French )

Page 5 ( PC 865 : Nordic )

20

21

Page 19 ( PC 858 : Euro )

Page 255 ( Space Page )

22

23

International Character Set

Chapter 5. Control Commands List

Control codes

<HT> 09 Horizontal tab
<LF> 0A Print and line feed
<FF> 0C Print and return to standard mode in

<CR> 0D Print and carriage return
<CAN> 18 Cancel print data in page mode
<DLE> <EOT> n 10 04 n Real-time status transmission
<DLE> <ENQ> n 10 05 n Real-time request to printer
<ESC> <FF> 1B 0C Print data in page mode
<ESC> <SP> n 1B 20 n Set right-side character spacing
<ESC> ! n 1B 21 n Select print modes
<ESC> $ nL nH 1B 24 nL nH Set absolute print position
<ESC> % n 1B 25 n Select/Cancel user-defined character set
<ESC> & y c1 c2 .. 1B 26 y c1 c2 Define user-defined characters
<ESC> * m nL nH .. 1B 2A m nL nH Select bit-image mode
<ESC> - n 1B 2D n Turn underline mode on/off
<ESC> 2 1B 32 Select default line spacing
<ESC> 3 n 1B 33 n Set line spacing
<ESC> = n 1B 3D n Set peripheral device
<ESC> ? n 1B 3F n Cancel user-defined characters
<ESC> @ 1B 40 Initialize printer
<ESC> D n1 ~ nK 1B 44 … 00 Set horizontal tab position
<ESC> E n 1B 45 n Turn emphasized mode on/off
<ESC> G n 1B 47 n Turn double-strike mode on/off
<ESC> J n 1B 4A n Print and feed paper
<ESC> L 1B 4C Select page mode
<ESC> M n 1B 4D n Select character fonts
<ESC> R n 1B 52 n Select an international character set
<ESC> S 1B 53 Select standard mode
<ESC> T n 1B 54 n Select print direction in page mode
<ESC> V n 1B 56 n Turn 90º clockwise rotation mode on/off
<ESC> W xL….. 1B 57 …. Set printing area in page mode
<ESC> ₩ nL nH 1B 5C n Set relative print position
<ESC> a n 1B 61 n Select justification

Hexadecimal
Codes

Function

page mode

24

25

Control codes

Hexadecimal
codes

Function

<ESC> c 3 n 1B 63 33 n Select paper sensor to output paper end

signals
<ESC> c 4 n 1B 63 34 n Select paper sensor to stop printing
<ESC> c 5 n 1B 63 35 n Enable/Disable panel button
<ESC> d n 1B 64 n Print and feed n lines
<ESC> p m t1 t2 1B 70 m t1 t2 Generate pulse
<ESC> t n 1B 74 n Select character code table
<ESC> { n 1B 7B n Turn on/off upside-down printing mode
<FS> p n m 1C 70 n m Print NT bit image
<FS> q n …. 1C 71 n … Define NV bit image
<GS> ! n 1D 21 n Select character size
<GS> $ nL nH 1D 24 nL nH Set absolute vertical print position in

page mode
<GS> * x y ….. 1D 2A x y ….. Define downloaded bit image
<GS> / m 1D 2F n Print downloaded bit image
<GS> : 1D 3A Start/end macro definition
<GS> B n 1D 42 n Turn white/black reverse printing mode

on/off
<GS> H n 1D 48 n Select printing position of HRI characters
<GS> I n 1D 49 n Transmit printer ID
<GS> L nL nH 1D 4C nL nH Set left margin
<GS> P x y 1D 50 x y Set horizontal and vertical motion units
<GS> V m
<GS> V m n

1D 56 m
1D 56 m n

Select cut mode and cut paper

<GS> W nL hH 1D 57 nL nH Set printing area width
<GS> ₩ nL nH 1D 5C nL nH Set relative vertical print position in page

mode
<GS> ^ r t m 1D 5E r t m Execute macro
<GS> a n 1D 61 n Enable/Disable Automatic status back
<GS> f n 1D 62 n Select font for HRI characters
<GS> h n 1D 68 n Set bar code height

<GS> k m ….NUL
<GS> k m n …

1D 6B m… NUL
1D 6B m n …

Print bar code

<GS> r n 1D 72 n Transmit status
<GS> v 0 m …. 1D 76 30 Print raster bit image
<GS> w n 1D 77 n Set bar code width

Command Notation

[Name]
[Format]

[Range]
[Description]

The name of the command.
The code sequence. ASCII Indicates the ASCII equivalents.
Hex indicates the hexadecimal equivalents.
Decimal indicates the decimal equivalents.
[ ] k indicates the contents of the [ ] should be repeated k times.
Gives the allowable ranges for the arguments.
Describes the function of the command.

Explanation of Terms

LSB Least Significant Bit

HT

[Name]
[Format]

[Description]

LF

[Name]
[Format]

[Description]

FF

[Name]
[Format]

[Description]

CR

[Name]
[Format]

[Description]

Horizontal tab.
ASCII HT
Hex 09
Decimal 9
Moves the print position to the next horizontal tab position.

Print and line feed.
ASCII LF
Hex 0A
Decimal 10
Prints the data in the print buffer and feeds one line based on the current
line spacing.

Print and return to standard mode in page mode.
ASCII FF
Hex 0C
Decimal 12
Prints the data in the print buffer collectively and returns to standard mode.

Print and carriage return.
ASCII CR
Hex 0D
Decimal 13
When automatic line feed is enabled, this command functions the same as
LF : when automatic line feed is disabled, this command is ignored.

26

27

CAN

[Name]
[Format]

[Description]

Cancel print data in page mode.
ASCII CAN
Hex 18
Decimal 24
In page mode, deletes all the print data in the current printable area.

DLE EOT n

[Name]
[Format]

[Range]
[Description]

Bit Off/On Hex

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

4 On 10 16 Not used. Fixed to On.

5-6 - - - Undefined.

7 Off 00 0 Not used. Fixed to Off.

Bit Off/On Hex

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

3

4 On 10 16 Not used. Fixed to On.

7 Off 00 0 Not used. Fixed to Off.

Bit 5 : Becomes on when the paper end sensor detects paper end and printing stops.

Real-time status transmission.
ASCII DLE EOT n
Hex 10 04 n
Decimal 16 4 n
1 ≤n ≤4
Transmits the selected printer status specified by n in real-time, according
to the following parameters :
n = 1 : Transmit printer status.
n = 3 : Transmit error status. n = 4 : Transmit paper roll sensor status.

n = 2 : Transmit off-line status.

n = 1 : Printer status

Decimal

Function

Off 00 0 Drawer open/close signal is LOW (connector pin 3). 2
On 04 4 Drawer open/close signal is HIGH (connector pin 3).
Off 00 0 On-Line 3
On 08 8 Off-Line

n = 2 : Off-line status

Decimal

Function

Off 00 0 Cover is closed. 2
On 04 4 Cover is open.
Off 00 0

Paper is not being fed by using the

PAPER FEED

On 08 8 Paper is being fed by the PAPER FEED button.

Off 00 0 No paper-end stop. 5
On 20 32 Printing stops due to paper end.
Off 00 00 No error. 6
On 40 64 Error occurs.

button.

n = 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 - - - Undefined.

Off 00 0 No auto-cutter error. 3
On 08 8 Auto-cutter error occurs.

4 On 10 16 Not used. Fixed to On.

Off 00 0 No unrecoverable error. 5
On 20 32 Unrecoverable error occurs.
Off 00 0 No auto-recoverable error. 6
On 40 64 Auto recoverable error occurs.

7 Off 00 0 Not used. Fixed to Off.

Bit 3 :

Bit 6 :

If these errors occur due to paper jams or the like, it is possible to recover by
correcting the cause of the error and executing DLE ENQ n (1 ≤n ≤2).

When printing is stopped due to high print head temperature until the print
head temperature drops sufficiently or when the paper roll cover is open during
printing, bit 6 is on.

n = 4 : Continuous paper 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 Paper roll Near-END sensor : Paper adequate.
3 On 0C 12 Paper near-end is detected by the paper roll

Near-END sensor.
4 On 10 16 Not used. Fixed to On.
5 Off 00 0 Paper roll end sensor : Paper present.
6 On 60 96 Paper roll end detected by the paper roll-end

sensor.
7 Off 00 0 Not used. Fixed to Off.

DLE ENQ n

[Name]
[Format]

[Range]
[Description]

Real-time request to printer.
ASCII DLE ENQ n
Hex 10 05 n
Decimal 16 5 n
1 ≤n ≤2
Recovers from an error and restart printing from the line where the error
occurred.

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29

ESC FF

[Name]
[Format]

[Description]

Print data in page mode.
ASCII ESC FF
Hex 1B 0C
Decimal 27 12
In page mode, prints all buffered data in the printing area collectively.

ESC SP n

[Name]
[Format]

[Range]
[Description]

Set right-side character spacing.
ASCII ESC SP n
Hex 1B 20 n
Decimal 27 32 n
0 ≤n ≤255
Sets the character spacing for the right side of the character to
[n ×horizontal or vertical motion units].

ESC ! n

[Name]
[Format]

[Range]
[Description]

Select print modes.
ASCII ESC ! n
Hex 1B 21 n
Decimal 27 33 n
0 ≤n ≤255
Selects print mode(s) using n as follows.

Bit Off/On Hex Decimal Function

Off 00 0

0

On 01 1

1,2 - - - Undefined.

Off 00 0 Emphasized mode not selected. 3
On 08 8 Emphasized mode selected.
Off 00 0 Double-height mode not selected. 4
On 10 16 Double-height mode selected.
Off 00 0 Double-width mode not selected. 5
On 20 32 Double-width mode selected.

6 - - - Undefined.

Off 00 0 Underline mode not selected. 7
On 80 128 Underline mode selected.

Character font(12 ×24) selected.
Character font(9 ×17) selected.

ESC $ nL nH

[Name]
[Format]

[Range]

[Description]

Set absolute print position.
ASCII ESC $ nL n
Hex 1B 24 nL n
Decimal 27 36 nL n
0 ≤n ≤255
0 ≤n ≤255
Set the distance from the beginning of the line to the position at which
subsequent characters are to be printed.
* The distance from the beginning of the line to the print position is
[(nL + nH ×256) ×(vertical or horizontal notion unit)] inches.

ESC % n

[Name]
[Format]

[Range]
[Description]

Select / Cancel user-defined character set.
ASCII ESC % n
Hex 1B 25 n
Decimal 27 37 n
0 ≤n ≤255
Selects or cancels the user-defined character set.
When the LSB is 0, the user-defined character set is canceled.
When the LSB is 1, the user-defined character set is selected.

ESC & y c1 c2 [x1 d1…d(y X x1)]… [xk d1… d(yx X xk)]

[Name]
[Format]

[Range]

[Description]

Define user-defined characters.
ASCII ESC & n y c1 c2[x1 d1…d(y X x1)]… [xk d1… d(yx X xk)]
Hex 1B 26 n y c1 c2[x1 d1…d(y X x1)]… [xk d1… d(yx X xk)]
Decimal 27 38 n y c1 c2[x1 d1…d(y X x1)]… [xk d1… d(yx X xk)]
y = 3, 32 ≤c1 ≤c2 ≤126
0 ≤x ≤12 (12x24 font)
0 ≤x ≤9 (9x17 font)
0 ≤d1 … d(y X xk) ≤255

- y specifies the number of bytes in the vertical direction.

- c1 specifies the beginning character code for the definition,
and c2 specifies the final code.

- x specifies the number of dots in the horizontal direction.

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31

ESC * m nL nH d1…dk

[Name]
[Format]

[Range]

[Description]

m No. Vertical Dots

0 8-dots single-density 8 60 DPI 90 DPI

1 8-dot double-density 8 60 DPI 180 DPI
32 24-dot single-density 24 180 DPI 90 DPI
33 24-dot double-density 24 180 DPI 180 DPI

Select bit-image mode.
ASCII ESC * m nL nH d1…dk
Hex 1B 2A m nL nH d1…dk
Decimal 27 42 m nL nH d1…dk
m = 0, 1, 32, 33
0 ≤nL ≤255
0 ≤nH ≤3
0 ≤d ≤255
Selects a bit-image mode using m for the number of dots specified by nL and
nH, as follows :

Vertical Direction Horizontal Direction

Number

of Dots

Dot

Density

Density

ESC - n

[Name]
[Format]

[Range]
[Description]

Turn underline mode on / off.
ASCII ESC - n
Hex 1B 2D n
Decimal 27 45 n
0 ≤n ≤2, 48 ≤H ≤50
Turns underline mode on or off, based on the following values of n :

n Function

0, 48 Turns off underline mode.
1, 49 Turns on underline mode (1-dot thick).
2, 50 Turns on underline mode (2-dot thick).

ESC 2

[Name]
[Format]

[Description]

Select default line spacing.
ASCII ESC 2
Hex 1B 32
Decimal 27 50
Selects 1/6-inch line (approximately 4.32mm) spacing.

Dot

Number of Data (k)

nL + nH ×256

nL + nH ×256
(nL + nH ×256) ×3
(nL + nH ×256) ×3

ESC 3 n

[Name]
[Format]

[Range]
[Description]

Set line spacing
ASCII ESC 3 n
Hex 1B 33 n
Decimal 27 51 n
0 ≤n ≤255
Sets the line spacing to [n X vertical or horizontal motion unit] inches.

ESC = n

[Name]
[Format]

[Range]
[Description]

Select peripheral device.
ASCII ESC = n
Hex 1B 3D n
Decimal 27 61 n
0 ≤n ≤3
Selects device to which host computer sends data, using n as follows :

Bit Off/On Hex Decimal Function

Off 00 0 Printer Disabled. 0
On 01 1 Printer Disabled.

1-7 - - - Undefined.

ESC ? n

[Name]
[Format]

[Range]
[Description]

Cancel user-defined characters.
ASCII ESC ? n
Hex 1B 3F n
Decimal 27 63 n
32 ≤n ≤126
Cancels user-defined characters.

ESC @

[Name]
[Format]

[Range]
[Description]

Initialize printer.
ASCII ESC @
Hex 1B 40
Decimal 27 64
32 ≤n ≤126
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.

32

33

ESC D n1… nk NUL

[Name]
[Format]

[Range]

[Description]
* n specifies the column number for setting a horizontal tab position from the beginning
of the line.
* k indicates the total number of horizontal tab positions to be set.

Set horizontal tab positions.
ASCII ESC D n1… nk NUL
Hex 1B 44 n1… nk 00
Decimal 27 68 n1… nk 0
1 ≤n ≤255
0 ≤k ≤32
Sets horizontal tab positions.

ESC E n

[Name]
[Format]

[Range]
[Description]
* When the LSB of n is 0, emphasized mode is turned off.
* When the LSB of n is 1, emphasized mode is turned on.

Turn emphasized mode on / off.
ASCII ESC E n
Hex 1B 45 n
Decimal 27 69 n
0 ≤n ≤255
Turns emphasized mode on or off.

ESC G n

[Name]
[Format]

[Range]
[Description]
* When the LSB of n is 0, double-strike mode is turned off.
* When the LSB of n is 1, double-strike mode is turned on.

Turn on / off double-strike mode.
ASCII ESC G n
Hex 1B 47 n
Decimal 27 71 n
0 ≤n ≤255
Turns double-strike mode on or off.

ESC J n

[Name]
[Format]

[Range]
[Description]

Print and feed paper.
ASCII ESC J n
Hex 1B 4A n
Decimal 27 74 n
0 ≤n ≤255
Prints the data in the print buffer and feeds the paper
[n X vertical or horizontal motion unit] inches.

ESC L

[Name]
[Format]

[Description]

Select page mode.
ASCII ESC L
Hex 1B 4C
Decimal 27 76
Switches from standard mode to page mode.

ESC M n

[Name]
[Format]

[Range]
[Description]

Select character font.
ASCII ESC M n
Hex 1B 4D n
Decimal 27 77 n
n = 0, 1, 48, 49
Selects character fonts.

n Function

0, 48
1, 49

Character font A (12 ×24) selected.
Character font B (9 ×17) selected.

ESC R n

[Name]
[Format]

[Range]
[Description]
[Default]

n Character set n Character set

0 U.S.A 5 Sweden
1 France 6 Italy
2 Germany 7 Spain
3 U.K 9 Norway
4 Denmark 1 10 Denmark 2

Select an international character set.
ASCII ESC R n
Hex 1B 52 n
Decimal 27 82 n
0 ≤n ≤10
Selects an international character set in from the following table.
n = 0

ESC S

[Name]
[Format]

[Description]

Select standard mode
ASCII ESC S
Hex 1B 53
Decimal 27 83
Switches from page mode to standard mode.

34

35

ESC T n

[Name]
[Format]

[Range]
[Description]
[Default]

n Print Direction Starting Position

0, 48 Left right Upper left (A in the figure)
1, 49 Bottom to top Lower left (B in the figure) Print area
2, 50 Right to left Lower right (C in the figure)
3, 51 Top to bottom Upper right (D in the figure)

Select print direction in page mode.
ASCII ESC T n
Hex 1B 54 n
Decimal 27 84 n
0 ≤n ≤3
48 ≤n ≤51
Selects the print direction and starting position in page mode.
n specifies the print direction and starting position as follows :

A→→→→

B→→→→

ESC V n

[Name]
[Format]

[Range]
[Description]

Turn 90°clockwise rotation mode on/off.
ASCII ESC V n
Hex 1B 56 n
Decimal 27 86 n

0 ≤n ≤1, 48 ≤n ≤49
Turn 90°clockwise rotation mode on/off.
n is used as follows :

n Function

0, 48
1, 49

Turn off 90°clockwise rotation mode.
Turn on 90°clockwise rotation mode.

ESC W xL xH yL yH dxL dxH dyL dyH

[Name]
[Format]

[Range]
[Description]

Set printing area in page mode.
ASCII ESC W xL xH yL yH dxL dxH dyL dyH
Hex 1B 57 xL xH yL yH dxL dxH dyL dyH
Decimal 27 87 xL xH yL yH dxL dxH dyL dyH
0 ≤ xL xH yL yH dxL dxH dyL dyH ≤255 (except dxL=0 or dyL=dyH=0)
The horizontal starting position, vertical starting position, printing area width,
and printing area height are defined as x0, y0, dx (inch), respectively.
x0 = [(xL + xH ×256)] ×(horizontal motion unit)]
y0 = [(yL + yH ×256)] ×(vertical motion unit)]
dx = [(dxL + dxH ×256)] ×(horizontal motion unit)]
dy = [(dyL + dyH ×256)] ×(horizontal motion unit)]
The printing area is set as shown in the figure below.

←←←←C

ESC ₩ n

[Name]
[Format]

[Range]

[Description]

D→→→→

Set relative print position.
ASCII ESC ₩ nL nH
Hex 1B 5C nL nH
Decimal 27 92 nL nH
0 ≤nL ≤255
0 ≤nH ≤255
Set the print starting position based on the current position by using the
horizontal or vertical motion unit.
* This command sets the distance from the current position to
[(nL + nH ×256) ×horizontal or vertical motion unit]

ESC a n

[Name]
[Format]

[Range]
[Description]

Select justification.
ASCII ESC a n
Hex 1B 61 n
Decimal 27 97 n
0 ≤nL ≤2, 48 ≤nL ≤50
Aligns all the data in one line to the specified position.
n selects the type of justification as follows :

n Justification

0, 48 Left justification
1, 49 Centering
2, 50 Right justification

ESC c 3 n

[Name]
[Format]

[Range]
[Description]

Bit Off/On Hex Decimal Function

4-7 - - - Undefined.

Select paper sensor(s) to output paper end signals.
ASCII ESC c 3 n
Hex 1B 63 33 n
Decimal 27 99 51 n
0 ≤n ≤255
Selects the paper sensor(s) to output paper end signals.
* Each bit of n is used as follows.

Off 00 0 Paper roll near-end sensor disable. 0
On 01 1 Paper roll near-end sensor enable.
Off 00 0 Paper roll near-end sensor disable. 1
On 02 2 Paper roll near-end sensor enable.
Off 00 0 Paper roll end sensor disable. 2
On 04 4 Paper roll end sensor enable.
Off 00 0 Paper roll end sensor disable. 3
On 08 8 Paper roll end sensor enable.

36

37

ESC c 4 n

[Name]
[Format]

[Range]
[Description]

Bit Off/On Hex Decimal Function

2-7 - - - Undefined.

Select paper sensor(s) to stop printing.
ASCII ESC c 4 n
Hex 1B 63 34 n
Decimal 27 99 52 n
0 ≤nL ≤255
Selects the paper sensor(s) used to stop printing when a paper-end is
detected, using n as follows :

Off 00 0 Paper roll end sensor disable. 0
On 01 1 Paper roll end sensor enable.
Off 00 0 Paper roll end sensor disable. 1
On 02 2 Paper roll end sensor enable.

ESC c 5 n

[Name]
[Format]

[Range]
[Description]

Enable / Disable panel button.
ASCII ESC c 3 n
Hex 1B 63 35 n
Decimal 27 99 53 n
0 ≤n ≤255
Enables or disables the panel button.
* When the LSB of n is 0, the panel buttons are enabled.
* When the LSB of n is 1, the panel buttons are disabled.

ESC d n

[Name]
[Format]

[Range]
[Description]

Print and feed n lines.
ASCII ESC d n
Hex 1B 64 n
Decimal 27 100 n
0 ≤n ≤255
Prints the data in the print buffer and feeds n lines.

ESC p m t1 t2

[Name]
[Format]

[Range]

[Description]

Generate pulse.
ASCII ESC p m t1 t2
Hex 1B 70 m t1 t2
Decimal 27 112 m t1 t2
m = 0, 1, 48, 49
0 ≤t1 ≤255, 0 ≤t2 ≤255
Outputs the pulse specified by t1 and t2 to connector pin m as follows.

m Connector pin

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

ESC t n

[Name]
[Format]

[Range]
[Description]

Select character code table.
ASCII ESC t n
Hex 1B 74 n
Decimal 27 116 n
0 ≤n ≤5, n = 255
Selects a page n from the character code table.

n Page

0 0 (PC437 {USA, standard Europe})
1 1 (Katakana)
2 2 (PC850 {Multilingual})
3 3 (PC860 {Portuguese})
4 4 (PC863 {Canadian-French})
5 5 (PC865 {Nordic})

19 19 (PC858 {Euro})

255 Space page

ESC { n

[Name]
[Format]

[Range]
[Description]

Turns on / off upside-down printing mode.
ASCII ESC { n
Hex 1B 7B n
Decimal 27 123 n
0 ≤n ≤255
Turns upside-down printing mode on or off.
* When the LSB of n is 0, upside-down printing mode is turned off.
* When the LSB of n is 1, upside-down printing mode is turned on.

FS p n m

[Name]
[Format]

[Range]

[Description]

m Mode Vertical Dot Density (DPI) Horizontal Dot Density (DPI)

0, 48 Normal 180 180
1, 49 Double-width 180 90
2, 50 Double-height 90 180
3, 51 Quadruple 90 90

Print NV bit image.
ASCII FS p n m
Hex 1C 70 n m
Decimal 28 112 n m
1 ≤n ≤255
0 ≤m ≤3, 48 ≤m ≤51
Prints a NV bit image n using the mode specified by m.

* n is the number of the NV bit image (defined using the FS q command).
* m specifies the bit image mode.

38

39

FS q n [xL xH yL yH d1…dk]1…[xL xH yL yH d1…dk]n

[Name]
[Format]

[Range]

[Description]

Defined NV bit image.
ASCII FS q n
Hex 1C 71 n
Decimal 28 113 n
1 ≤n ≤255
0 ≤xL ≤255
0 ≤xH ≤3 (when 1 ≤(xL + xH ×256) ≤1023
0 ≤yL ≤3 (when 1 ≤(xL + xH ×256) ≤288
1 ≤d ≤255
k = (xL + xH ×256) ×(yL + yH ×256) ×8
Total defined data area = 2M bits (256K bytes)
Define the NV bit image specified by n.
* n specifies the number of the defined NV bit image.
* xL, xH specifies (xL + xH ×256) ×8 dots in the horizontal direction
for the NV bit image you are defining.
* yL, yH specifies (yL + yH ×256) ×8 dots in the vertical direction
for the NV bit image you are defining.

[xL xH yL yH d1…dk]1…[xL xH yL yH d1…dk]n

[xL xH yL yH d1…dk]1…[xL xH yL yH d1…dk]n

[xL xH yL yH d1…dk]1…[xL xH yL yH d1…dk]n

GS ! n

[Name]
[Format]

[Range]

[Description]

Bit Off/On Hex Decimal Function

0-3 Character height selection. See Table 2
4-7 Character width selection. See Table 1

Hex Decimal Width Hex Decimal Height

00 0 1 (normal) 00 0 1 (normal)
10 16 2 (double-width) 10 16 2 (double-width)
20 32 3 20 32 3
30 48 4 30 48 4
40 64 5 40 64 5
50 80 6 50 80 6
60 96 7 60 96 7
70 112 8 70 112 8

Select character size.
ASCII GS ! n
Hex 1D 21 n
Decimal 29 33 n
0 ≤n ≤255
(1 ≤vertical number of times ≤8, 1 ≤horizontal number of times ≤8)
Selects the character height using bits 0 to 2 and selects the character
width using bits 4 to 7, as follows :

Table 1

Character Width Selection

Character Height Selection

Table 2

GS $ nL nH

[Name]
[Format]

[Range]
[Description]

Set absolute vertical print position in page mode.
ASCII GS $ nL nH
Hex 1D 24 nL nH
Decimal 29 36 nL nH
0 ≤nL ≤255, 0 ≤nH ≤255
* Sets the absolute vertical print starting position for
buffer character data in page mode.
* This command sets the absolute print position to
[(nL + nH ×256) ×(vertical or horizontal motion unit)] inches.

GS * x y d1…d(x ×y ×8)

[Name]
[Format]

[Range]

[Description]

Define downloaded bit image.
ASCII GS *
Hex 1D 2A x y d1…d(x ×y ×8)
Decimal 29 42 x y d1…d(x ×y ×8)
1 ≤x ≤255, 1 ≤y ≤48
x x y ≤1536, 0 ≤d ≤255

Defines a downloaded bit image using the dots specified by x and y.
* x indicates the number of dots in the horizontal direction.
* y indicates the number of dots in the vertical direction.

x y d1…d(x ×y ×8)

GS / m

[Name]
[Format]

[Range]
[Description]

m Mode

0, 48 Normal 180 180
1, 49 Double-width 180 90
2, 50 Double-height 90 180
3, 51 Quadruple 90 90

Print downloaded bit image.
ASCII GS / m
Hex 1D 2F m
Decimal 29 47 m
0 ≤m ≤3, 48 ≤m ≤51
Prints a downloaded bit image using the mode specified by m.
m selects a mode from the table below :

Vertical Dot Density (DIP) Horizontal Dot Density (DIP)

GS :

[Name]
[Format]

[Description]

Start/End macro definition.
ASCII GS :
Hex 1D 3A
Decimal 29 58
Starts or ends macro definition.

40

41

GS B n

[Name]
[Format]

[Range]
[Description]

Turn white/black reverse printing mode on/off.
ASCII GS B n
Hex 1D 42 n
Decimal 29 66 n
0 ≤n ≤255
Turns on or off white/black reverse printing mode.
* When the LSB is 0, white/black reverse printing mode is turned off.
* When the LSB is 1, white/black reverse printing mode is turned on.

GS H n

[Name]
[Format]

[Description]

0, 48 Not printed.
1, 49 Above bar code.
2, 50 Below bar code.
3, 51 Both above and below the bar code.

Select printing position of HRI characters.
ASCII GS B n
Hex 1D 48 n
Decimal 29 72 n
Selects the printing position of HRI characters when printing a bar code.
n selects the printing position as follows :

n Printing position

* HRI indicates Human Readable Interpretation.

GS I n

[Name]
[Format]

[Range]
[Description]

n Printer ID Specification ID (hexadecimal)

1, 49 Printer model ID SRP-350 series 20
2, 50 Type ID 02
3, 51 ROM version ID Depends on ROM version 02

Transmit printer ID.
ASCII GS I n
Hex 1D 49 n
Decimal 29 73 n
1 ≤n ≤3, 49 ≤n ≤51
Transmits the printer ID specified by n as follows :

GS L nL nH

[Name]
[Format]

[Range]
[Description]

Set left margin.
ASCII GS L nL nH
Hex 1D 4C nL nH
Decimal 29 76 nL nH
0 ≤nL ≤255, 0 ≤nH ≤255
Sets the left margin using nL and nH.
* The left margin is set to
[(nL + nH ×256) ×horizontal motion unit] inches.

GS P x y

[Name]
[Format]

[Range]
[Description]

Set horizontal and vertical motion units.
ASCII GS P
Hex 1D 50 x y
Decimal 29 80 x y
0 ≤x ≤255, 0 ≤y ≤255
Sets the horizontal and vertical motion units to approximately 25.4/x mm
{1/x inch and } and approximately 25.4/y mm {1/y inches }, respectively.
When x and y are set to 0, the default setting of each value is used.

① GS V m , ② GS V m n

[Name]
[Format]

[Range]

[Description]

Select cut mode and cut paper.
① ASCII GS V m

Hex
Decimal 29 86 m
② ASCII GS V m n
Hex
Decimal 29 86 m n

① m = 1, 49
② m = 66, 0 ≤n ≤255

Selects a mode for cutting paper and executes paper cutting.
The value of m selects the mode as follows :

1D 56 m

1D 56 m n

m Print mode

0, 1, 49 Partial cut (one point left uncut)

66

Feeds paper (cutting position + [nX(vertical motion unit)]),
and cuts the paper partially (one point left uncut).

x y

42

43

GS W nL nH

[Name]
[Format]

[Range]
[Description]

GS ₩ nL nH

[Name]
[Format]

[Range]
[Description]

GS ^ r t m

[Name]
[Format]

[Range]

[Description]

Set printing area width.
ASCII GS W nL nH
Hex 1D 57 nL nH
Decimal 29 87 nL nH
0 ≤nL ≤255, 0 ≤nH ≤255
Sets the printing area width to the area specified by nL and nH.
* The printing area width is set to
[(nL + nH ×256) ×horizontal motion unit] inches.

Set relative vertical print position in page mode.
ASCII GS ₩ nL nH
Hex 1D 5C nL nH
Decimal 29 92 nL nH
0 ≤nL ≤255, 0 ≤nH ≤255
Sets the relative vertical print starting position from the current position in
page mode.
* This command sets the distance from the current position to
[(nL + nH ×256) ×vertical or horizontal motion unit] inches.

Execute macro.
ASCII GS ^ r t m
Hex 1D 5E r t m
Decimal 29 94 r t m
0 ≤r ≤255, 0 ≤t ≤255
m = 0, 1
Executes a macro.
* r specifies the number of times to execute the macro.
* t specifies the waiting time for executing the macro.
* m specifies macro executing mode.
When the LSB of m = 0
The macro executes r times continuously at the interval specified by t.
When the LSB of m = 1 :
After waiting for the period specified by t, the PAPER OUT LED
indicators blink and the printer waits for the FEED button to be

pressed. After the button is pressed, the printer executes the macro
once. The printer repeats the operation r times.

GS a n

[Name]
[Format]

[Range]
[Description]

Bit Off/On Hex Decimal Status for ASB

0

1

2

3

4-7 - - - Undefined.

[Details] * If any of the status items in the table above are enabled, the printer

Enable/Disable Automatic Status Back.
ASCII GS a n
Hex 1D 61 n
Decimal 29 97 n
0 ≤n ≤255
Enables or disables ASB and specifies the status items to include, using n
as follows :

Off 00 0 Drawer kick-out connector pin 3 status disabled.
On 01 1 Drawer kick-out connector pin 3 status enabled.
Off 00 0 On-line / Off-line status disabled.
On 02 2 On-line / Off-line status enabled.
Off 00 0 Error status disabled.
On 04 4 Error status enabled.
Off 00 0 Paper roll sensor status disabled.
On 08 8 Paper roll sensor status enabled.

transmits the status when this command is executed. The printer
automatically transmits the status whenever the enabled status item
changes. The disabled status items may change, in this case, because

each status transmission represents the current status.
* If all status items are disabled, the ASB function is also disabled.
* If the ASB is enabled as a default, the printer transmits the status when
the printer data reception and transmission is possible at the first time

from when the printer is turned on.
* The following four status bytes are transmitted without confirming

whether the host is ready to receive data. The four status bytes must be

consecutive, except for the XOFF code.

* Since this command is executed after the data is processed in the

receive buffer, there may be a time la between data reception and

status transmission.

* When the printer is disabled by ESC= (Select peripheral device), the

four status bytes are transmitted whenever the status changes.
* The status to be transmitted are as follows :

44

45

First byte (printer information)

Bit Off/On Hex Decimal Status for ASB

0 Off 00 0 Not used. Fixed to Off.
1 Off 00 0 Not used. Fixed to Off.

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

2

On 04 4 Drawer kick-out connector pin 3 is HIGH.
Off 00 0 Online.

3

On 08 8 Offline.

4 On 10 16 Not used. Fixed to On.

Off 00 0 Cover is closed.

5

On 20 32 Cover is open.
Off 00 0

6

On 40 64

7 Off 00 0 Not used. Fixed to Off.

Second byte (printer information)

Bit Off/On Hex Decimal Status for ASB

0 - - - Undefined.
1 - - - Undefined.
2 - - - Undefined.

Off 00 0 No Auto-cutter error.

3

On 08 8 Auto-cutter error occurred.

4 Off 00 00 Not used. Fixed to Off.

Off 00 0 No unrecoverable error.

5

On 20 32 Unrecoverable error occurred.
Off 00 0 No automatically recoverable error.

6

On 40 64 Automatically recoverable error occurred.

7 Off 00 0 Not used. Fixed to Off.

Bit 3 : If these errors occur due to paper jams or the line, it is possible to

recover by correcting the cause of the error and executing

DLE ENQ n (1≤n≤2). If an error due to a circuit failure

(e.g. wire break) occurs, it is impossible to recover.
Bit 6 : When printing is stopped due to high print head temperature until
the print head temperature drops sufficiently or when the paper roll

cover is open during printing, bit 6 is On.

Paper is not being fed by using the PAPER FEED button.
Paper is being fed by using the PAPER FEED button.

Third byte (paper sensor information)

Bit Off/On Hex Decimal Status for ASB

0,1

2,3

5,6 - - - Undefined.

Fourth byte (paper sensor information)

Bit Off/On Hex Decimal Status for ASB

0-3 - - - Undefined.

5,6 - - - Undefined.

[Default]

Off 00 0 Paper roll Near-END sensor : paper adequate.
On 03 3 Paper roll Near-END sensor : paper near end.
Off 00 0 Paper roll end sensor : paper present.
On 0C 12 Paper roll end sensor : paper not present.

4 Off 00 0 Not used. Fixed Off.

7 Off 00 0 Not used. Fixed Off.

4 Off 00 0 Not used. Fixed Off.

7 Off 00 0 Not used. Fixed Off.

n=0 when DIP SW 2-1 is Off, n=2 when DIP SW 2-1 is On.

GS f n

[Name]
[Format]

[Range]
[Description]

0, 48
1, 49

Select font for Human Readable Interpretation(HRI) characters.
ASCII GS f n
Hex 1D 66 n
Decimal 29 102 n
n = 0, 1, 48, 49
Selects a font for the HRI characters used when printing a bar code.
n selects a font from the following table :

n Font

Font A (12 ×24)
Font B (9 ×17)

GS h n

[Name]
[Format]

[Range]
[Description]

Set bar code height.
ASCII GS f n
Hex 1D 68 n
Decimal 29 104 n
1 ≤ n ≤255
Set the height of the bar code.
n specifies the number of dots in the vertical direction.

46

47

① GS k m d1…dk NUL , ② GS k m n d1…dn

[Name]
[Format]

[Range]

[Description]

m Bar Code System Number of Characters Remarks

0 UPC-A
1 UPC-E
2 JAN13(EAN13)
3 JAN8(EAN8)

①

4 CODE 39

5 ITF

6 CODABAR

65 UPC-A
66 UPC-E
67 JAN13(EAN13)
68 JAN8(EAN8)

69 CODE 39

②

70 ITF

71 CODABAR

72 CODE 93
73 CODE 128

Print bar code.
① ASCII GS k m d1…dk NUL

Hex
Decimal 29 107 m d1…dk 0
② ASCII GS k m n d1…dn
Hex
Decimal 29 107 m n d1…dn

① 0 ≤m ≤6 (k and d depends on the bar code system used.)
② 65 ≤m ≤73 (n and d depends on the bar code system used.)

Selects a bar code system and prints the bar-code.
m selects a bar ode system as follows :

1D 6B m d1…dk 00

1D 6B m n d1…dn

11 ≤k ≤12 48 ≤d ≤57
11 ≤k ≤12 48 ≤d ≤57
12 ≤k ≤13 48 ≤d ≤57
7 ≤k ≤8 48 ≤d ≤57

1 ≤k

1 ≤k (even number) 48 ≤d ≤57

1 ≤k

11 ≤n ≤12 48 ≤d ≤57
11 ≤n ≤12 48 ≤d ≤57
12 ≤n ≤13 48 ≤d ≤57
7 ≤n ≤8 48 ≤d ≤57

1 ≤n ≤255

1 ≤n ≤255 (even
number)

1 ≤n ≤255

1 ≤ n ≤255 0 ≤d ≤127
1 ≤ n ≤255 0 ≤d ≤127

48 ≤d ≤57,
65 ≤d ≤90, 32, 36, 37, 43, 45, 46, 47

48 ≤d ≤57,
65 ≤d ≤68, 36, 43, 45, 46, 47 ,58

48 ≤d ≤57,
65 ≤d ≤90, 32, 36, 37, 43, 45, 46, 47
d1 = dk = 42(1)

48 ≤d ≤57

48 ≤d ≤57,
65 ≤d ≤68, 36, 43, 45, 46, 47 ,58

GS r n

[Name]
[Format]

[Range]
[Description]

Transmit status.
ASCII GS V n
Hex 1D 72 n
Decimal 29 114 n
n = 1, 2, 49, 50
Transmits the status specified by n as follows.

GS v 0 m xL xH yL yH d1…dk

[Name]
[Format]

[Range]

[Description]

m Mode

0, 48 Normal 180 DPI 180 DPI
1, 49 Double-width 180 DPI 90 DPI
2, 50 Double-height 90 DPI 180 DPI
3, 51 Quadruple 90 DPI 90 DPI

Print raster bit image.
ASCII GS V 0 m xL xH yL yH d1…dk
Hex 1D 76 30 m xL xH yL yH d1…dk
Decimal 29 118 48 m xL xH yL yH d1…dk
0 ≤m ≤3, 48 ≤m ≤51
0 ≤xL ≤255
0 ≤xH ≤255
0 ≤yL ≤255
0 ≤d ≤255
k = (xL + xH ×256) ×(yL + yH ×256) (k ≠0)
Selects Raster bit-image mode. The value of m selects the mode, as follows :

Vertical Dot Density (DIP) Horizontal Dot Density (DIP)

* xL, xH, select the number of data bits (xL + xH ×256) in the
horizontal direction for the bit image.

* yL, yH, select the number of data bits (yL + yH ×256) in the
vertical direction for the bit image.

GS w n

[Name]
[Format]

[Range]
[Description]

n

multi-level bar code

2 0.282 0.282 0.706
3 0.423 0.423 1.129
4 0.564 0.564 1.411
5 0.706 0.706 1.834
6 0.847 0.847 2.258

* Multi-level bar codes are as follows :

Set bar code width.
ASCII GS w n
Hex 1D 77 n
Decimal 29 119 n
2 ≤n ≤6
Set the horizontal size of the bar code.
n specifies the bar code width as follows :

Module width for

Thin element width (mm) Thick element width (mm)

UPC-A, UPC-E, JAN13(EAN13), JAN8(EAN8), CODE93, CODE128.
* Binary-level bar codes are as follows :
CODE39, ITF, CODABAR.

Binary-level bar code

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APPENDIX

A. Star Mode Command Summary

<ESC> ”R” n 1B 52 n Select international

<ESC> <GS> t n 1B 1D 74n Select character table
<ESC> ”/” “1”
<ESC> ”/” <1>
<ESC> ”/” “0”
<ESC> ”/” <0>
<ESC> “b” n1 n2 n3 n4
d1 … dk <RS>

<ESC> ”M” 1B 4D Select 12-dot pitch printing
<ESC> ”p” 1B 70 Select 14-dot pitch printing
<ESC> ”P” 1B 50 Select 15-dot pitch printing
<ESC> ”:” 1B 3A Select 16-dot pitch printing
<ESC> <SP> n 1B 20 n Set character spacing
<SO> 0E Sets the printing magnified

<DC4> 14 Resets the printing

<ESC> “W” n 1B 57 n Sets the magnification rate

<ESC> <SO> 1B 0E Sets the printing magnified

<ESC> <DC4> 1B 14 Resets the printing

<ESC> “h” n 1B 68 n Sets the magnification rate

<ESC> ”-“ “1”
<ESC> ”-:” <1>
<ESC> “_” “1”
<ESC> “_” <1>
<ESC> “4” 1B 34 Select highlight printing
<ESC> “5” 1B 35 Cancel highlight printing
<SI> 0F Inverted printing
<DC2> 12 Cancel inverted printing
<ESC> “E” 1B 45 Select emphasized printing

Control codes

Hexadecimal codes

1B 2F 31
1B 2F 01
1B 2F 30
1B 2F 00
1B 62 n1 n2 n3 n4
d1 … dk 1E

1B 2D 31
1B 2D 01
1B 5F 31
1B 5F 01

Function

character set

Select slash zero

Select normal zero

Select bar code printing

double in character width.

magnified in character
width.

in character width.

double in character height.

magnified in character
height.

in character height.
Select underlining

Select over lining

Control codes

Hexadecimal codes

Function

<ESC> “F” 1B 46 Cancel emphasized printing
<ESC> “C” n 1B 43 n Set page length in lines
<ESC> “C” <0> n 1B 43 00 n Set page length in inches
<ESC> “N” n 1B 4E n Set bottom margin
<ESC> “O” 1B 4F Cancel bottom margin
<ESC> “I” n 1B 6C n Set left margin
<ESC> “Q” n 1B 51 n Set right margin
<LF> 0A Line Feed

<ESC> “a” n 1B 61 n Feed paper n lines
<FF> 0C Form Feed
<HT> 09 Horizontal tab
<VT> 0B Vertical tab
<ESC> “z” “1” 1B 7A 31 Set line spacing to 4 mm
<ESC> “0” 1B 30 Set line spacing to 3 mm
<ESC> “J” n 1B 4A n One time n/4 mm feed
<ESC> “I” n 1B 49 n One time n/8 mm feed
<ESC> “B” n1 n2…<0> 1B 42 n1 n2 … 00 Set vertical tab stops
<ESC> “D” n1 n2…<0> 1B 44 n1 n2 … 00 Set horizontal tab stops
<ESC> <GS> “A” n1 n2 1B 1D 41 n1 n2 Absolute position setting
<ESC> <GS> “R” n1 n2 1B 1D 52 n1 n2 Relative position setting
<ESC> <GS> “a” n 1B 1D 61 n Alignment
<ESC> “K” n <0>
m1 m2 …
<ESC> “L” n <0>
m1 m2 …
<ESC> “k” n <0> d1 1B 6B n 00 d1 Print fine density graphics
<ESC> “X” n1 n2 1B 58 n1 n2 Print fine density graphics
<ESC> <FS> “p” n m 1B 1C 70 n m Print NV bit image
<ESC> “&” ”1” ”1”
n m1 m2 … m48
<ESC> “&” <1> <1>
n m1 m2 … m48
<ESC> “&” ”1” ”0” n 1B 26 31 30 n
<ESC> “&” <1> <0> n 1B 26 01 00 n
<ESC> “%” “1”
<ESC> “%” <1>
<ESC> “%” “0”
<ESC> “%” <0>
<ESC> <GS> “*” xy 1B 1D 2A 78 79 Definition of download bit

<ESC> <GS> “/” m 1B 1D 2F 6D Printing of download bit image
<ESC> <BEL> n1 n2 1B 07 n1 n2 Define drive pulse width for

<BEL> 07 Control peripheral device #1

1B 48 n 00 m1 m2 Print normal density graphics

1B 4C n1 n2 m1 m2 Print high density graphics

1B 26 31 31 n
m1 m2 … m48
1B 26 01 01
n m1 m2 … m48

1B 25 31
1B 25 01
1B 25 30
1B 25 00

Define download character

Delete a download character

Enable download character set

Disable download character set

image

peripheral device #1.

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Control codes

<FS> 1C Control peripheral device #1

<EM> 19 Control peripheral device #2

<SUB> 1A Control peripheral device #2

<ESC> “d” n 1B 64 n Partial-cut command to the

<CAN> 18 Cancel last line & Initialize

<DC3> 13 Deselect printer
<DC1> 11 Set select mode
<RS> 1E Beep the buzzer
<ESC> “@” 1B 40 Initialize printer
<ENQ> 05 Inquiry (Status inquiry)
<EOT> 04 Near end status inquiry
<ESC> “?” <LF> <NUL> 1B 3F 0A 00 Reset printer hardware

<ESC> “8” n1 n2 1B 38 n1 n2 Registers a logo pattern
<ESC> “9” n1 n2 1B 39 n1 n2 Prints a logo pattern

Hexadecimal codes

Function

immediately.

immediately

immediately

auto cutter.

printer immediately

(Perform test print)

B. Connectors

RS-232 Ver.2ON

Interface Connector

䧎 When the Dip Switch is “ON” on the Serial Interface Board,

DTR and RTS are connected each other.

SRP-350/SRP-350S Connector

( Serial Interface )

PARALLEL Ver.2

Interface Connector

SRP-350P Connector

( Parallel Interface )

Ver.2

USB

USB Connector

SRP-350U Connector

( USB Interface )

Drawer kick-out
connector

Drawer kick-out
connector

Drawer kick-out
connector

Power supply
connector

Power supply
connector

Power supply
connector

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RS-232C Cable Connection

RS-485 Cable Connection

Interface Connector

Serial Interface (RS-232)

Pin No. Signal name Direction Function

1 FG - Frame Ground

2 TxD Output Transmit Data

3 RxD Input Receive Data

4 RTS Output Ready To Send

5 CTS Input Clear To Send

6 DSR Input Data Set Ready

7 SG - Signal Ground

20 DTR Output Data Terminal Ready

Serial Interface (RS-485)

Pin No. Signal Name Direction Function

1 FGND - Frame Ground

2 SD2 Output

3 SD1 Output

4 RD2 Input

5 RD1 Input

7 SGND - Signal Ground

8

9

10

11

54

DR2

Output Same as DTR(RS-232)

DR1

CS2

Input Same as DSR(RS-232)

CS1

Send Data

Receive Data

55

Parallel Interface (IEEE-1284)

Pin
No.

1 Host nStrobe HostClk HostClk
2 Host / Printer Data 0 (LSB) - Data 0 (LSB)
3
4 Host / Printer Data 2 - Data 2
5 Host / Printer Data 3 - Data 3
6 Host / Printer Data 4 - Data 4
7 Host / Printer Data 5 - Data 5
8 Host / Printer Data 6 - Data 6
9 Host / Printer Data 7 (MSB) - Data 7 (MSB)
10 Printer nAck PtrClk PtrClk
11 Printer Busy PtrBusy /Data3,7 PtrBusy
12 Printer Perror AckDataReq/Data2,6 AckDataReq
13 Printer Select Xflag /Data1,5 Xflag
14 Host nAutoFd HostBusy HostBusy
15 NC NC NC
16
17 FG FG FG
18 Printer Logic-H Logic-H Logic-H
19~30
31 Host nInit nInit nInit
32 Printer nFault nDataAvail /Data0,4 nDataAvail
33 GND ND ND
34 Printer DK_Status ND ND
35 Printer +5V ND ND
36 Host nSelectIn 1284-Active 1284-Active

Source Compatibility

Mode

Host / Printer Data 1

GND

GND

Nibble Mode Byte Mode

-

GND

GND

Data 1

GND

GND

USB Interface

Pin No. Signal Name Assignment (Color) Function

Shell Shield Drain Wire Frame Ground

1 VBUS Red Host Power

2 D- White Data Line(D-)

3 D+ Green Data Line(D+)

4 GND Black Signal Ground

Drawer Connector

Pin No. Signal name Direction

1 Frame ground -

2 Drawer kick- out drive signal 1 Output

3 Drawer open/close signal Input

4 +24V -

5 Drawer kick- out drive signal 2 Output

6 Signal ground -

C. Notes

Paper dust inside the printer may lower the print quality. In this
case clean the printer as follows.

1) Open the printer cover and remove the paper if exists.

2) Clean the print head with a cotton swab moistened with
alcohol solvent.

3) Clean the platen roller and paper end sensor with cotton
swab moistened with water.

4) Insert a paper roll and close the printer cover.

The remained amount of paper detected by paper near end
sensor varies with the diameter of the paper core.
To adjust the remained amount, contact your dealer.

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D. Specification

Printing method Thermal line printing

Dot density 180 X 180 dpi (7dots/mm)
Printing width 72.192 ± 0.2mm

Paper width 79 ~ 80 mm

Characters per line (default) 42 (Font A)

56 (Font B)

Printing speed 35.5 lines/sec(1/6” Feed)

150 mm/sec

Receive Buffer Size 4K Bytes

NOTE : Printing speed may be slower, depending on the data
transmission speed and the combination of control commands.

Supply voltage

Environmental
Conditions

LIFE *

MCBF *

* These values are calculated under printing level 2 with

recommended paper at normal temperature.

* These values may vary with environment temperature, printing

level, etc.

Input voltage 120/230 VAC

Frequency 50/60 Hz

Output voltage +24 VDC
Temperature 5 ~ 45 ℃ (Operating)

-10 ~ 50 ℃ (Storage)

Humidity 30 ~ 80 % RH (Operating)

10 ~ 90 % RH (Storage)
; Except for paper

Mechanism
Head

Auto Cutter 1,000,000 Cut

Mechanism 37,000,000 lines

15,000,000 lines

8

1x10

pulse

(Approximately 100 Km)

JE68-00112B

Rev. 3.00

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