BIXOLON Bixolon SRP-270 Installation instructions

Command Manual
SRP-270
Impact Printer
Rev. 1.01
http://www.samsungminiprinters.com

Rev. 1.01 - 2 -
SRP-270
■Table of Contents
1. Notice.......................................................................................................................... 3
2. Control Commands List ............................................................................................ 3
2-1 EPSON Mode ......................................................................................................... 3
2-2 CITIZEN Mode........................................................................................................ 4
2-3 STAR Mode ............................................................................................................ 4
3. Control Commands Details....................................................................................... 6
3-1 Command Notation................................................................................................. 6
3-2 Explanation of Terms.............................................................................................. 6
3-3 Control Commands Details..................................................................................... 6

Rev. 1.01 - 3 -
SRP-270
1. Notice
This Control Commands Manual contains information on the protocol and functions of all
control commands that can be used with this printer (SRP-270).
2. Control Commands List
2-1 EPSON Mode
Control code Hexadecimal code Function
<HT> 09 Horizontal tab
<LF> 0A Print and line feed
<CR> 0D Print and carriage return
<DLE> <EOT> n 10 04 n Real-time status transmission
<DLE> <ENQ> n 10 05 n Real-time request to printer
<ESC> <SP> n 1B 20 n Set right-side character spacing
<ESC> ! n 1B 21 n Select print modes
<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> < 1B 3C Return home
<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> K n 1B 4B n Print and Reverse feed
<ESC> R n 1B 52 n Select an international character set
<ESC> U n 1B 55 n Turn unidirectional printing mode
<ESC> a n 1B 61 n Select justification
<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> r n 1B 72 n Select print color
<ESC> m 1B 6D Execute partial cut
<ESC> { n 1B 7B n Turn on/off upside-down printing mode
<ESC> e n 1B 65 n Print and reverse feed n lines
<GS> I n 1D 49 n Transmit printer ID
<GS> V m
<GS> V m n
1D 56 m
1D 56 m n
Select cut mode and cut paper
<GS> a n 1D 61 n Enable/Disable Automatic status back
<GS> r n 1D 72 n Transmit status

Rev. 1.01 - 4 -
SRP-270
2-2 CITIZEN Mode
Control code Hexadecimal code Function
<FF> "n" 0C + n "n" -lines paper feed command
<LF> OA Paper feed command
<SO> 0E Enlarged character command
<SI> 0F Normal character command
<DC1> 11 Initial set command
<DC2> 12 Inverted character command
<DC3> 13 Red color print command
<CAN> 18 Clear command
<ESC> "P" <0> 1B, 50, 00 Paper partial cut command
<ESC> "P" <1> 1B, 50, 01 Paper partial cut command
<ESC> "-" "n" 1B, 2D, n Underline command
<ESC> "1" 1B, 31 1/9 inch paper feed preset command
<ESC> "2" 1B, 32 2/9 inch paper feed preset command
<ESC> "C" "n" 1B, 43, n Page length set command
<ESC> "f" "1" 1B, 66, 01 Form feed command
<SUB> 1A Second drawer drive command
<FS> 1C First drawer quick drive command
<ESC><BEL> n1 n2 1B, 07, n1, n2 Drive pulse setting command for the first
drawer
<BEL> 07 First drawer drive command
2-3 STAR Mode
Control code Hexadecimal code Function
<ESC> "C" n 1B 43 n Set page length at n lines
<ESC> "R" n 1B 52 n Select international character set.
<ESC> "M" 1B 4D Select 9×7(Half dots) character size
<SO> 0E Select expanded character mode
<SI> 0F Select upside-down
<DC2> 12 Cancel upside-down character
<DC4> 14 Cancel expanded character mode
(Default setting)
<ESC> "W" "1"
<ESC> "W" <1>
1B 57 31
1B 57 01
Select expanded character mode
<ESC> "W" "0"
<ESC> "W" <0>
1B 57 30
1B 57 00
Cancel expanded character mode
(Default setting)
<ESC> "4" 1B 34 Red color print selection
<ESC> "5" 1B 35 Red color print deselection
<ESC> "E" 1B 45 Emphasized print mode selection
<ESC> "F" 1B 46 Emphasized print mode deselection
(Default setting)
<ESC> "a" n 1B 61 n Feed paper n lines

Rev. 1.01 - 5 -
SRP-270
Control code Hexadecimal code Function
<ESC><BEL>n1 n2 1B 07 n1 n2 Adjust drive pulse width for peripheral
unit(Default setting)
<BEL> 07 Deferred drive command "A" for peripheral
unit 1
<FS> 1C Immediate drive command "B" for peripheral
unit 1
<SUB> 1A Immediate drive command for peripheral
unit 2
<EM> 19 Immediate drive command for peripheral
unit 2
<CAN> 18 Cancel print data in buffer
<ESC> "@" 1B 40 Initialize printer
<ESC> "e" "0"
<ESC> "e" <0>
1B 65 30
1B 65 00
FEED switch valid
(Default setting)
<ESC> "e" "1"
<ESC> "e" <1>
1B 65 31
1B 65 01
FEED switch invalid
<ESC> U n 1B 55 n Set or Cancel uni-direction mode
<ESC> - n 1B 2D n Set or Cancel underline mode
<ESC> "z" "1"
<ESC> "z" <1>
1B 7A 31
1B 7A 01
Set 1/6 inch line feed
<FF> 0C Page feed (form feed)
<ESC> d <0> 1B 64 00 Partial cut
<ESC> d <1> 1B 64 01 Partial cut
<ESC> "-" "1"
<ESC> "-" <1>
1B 5F 31
1B 5F 01 Select overline mode
<ESC> "-" "0"
<ESC> "-" <0>
1B 5F 30
1B 5F 00
Cancel overline mode
<ESC> "e" "1"
<ESC> "e" <1>
1B 65 31
1B 65 01 Set the control panel switch invalid
<ESC> "e" "0"
<ESC> "e" <0>
1B 65 30
1B 65 00 Set the control panel switch valid
<ESC> "f" "1"
<ESC> "f" <1>
1B 66 31
1B 66 01 Set the ON LINE switch invalid
<ESC> "f" "0"
<ESC> "f" <0>
1B 66 30
1B 66 00 Set the ON LINE switch valid

Rev. 1.01 - 6 -
SRP-270
3. Control Commands Details
3-1 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.
3-2 Explanation of Terms
LSB Least Significant Bit
3-3 Control Commands Details
HT
[Name]
[Format]
[Description]
Horizontal tab.
ASCII HT
Hex 09
Decimal 9
Moves the print position to the next horizontal tab position.
LF
[Name]
[Format]
[Description]
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.
CR
[Name]
[Format]
[Description]
Print and carriage return.
ASCII CR
Hex 0D
Decimal 13
- This command prints the data in the print buffer and does not feed the
paper.
- Sets the print starting position to the beginning of the line.

Rev. 1.01 - 7 -
SRP-270
DLE EOT n
[Name]
[Format]
[Range]
[Description]
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 = 2 : Transmit off-line status.
n = 3 : Transmit error status.
n = 4 : Transmit paper roll sensor status.
n = 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.
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-Line3
On 08 8 Off-Line
4 On 10 16 Not used. Fixed to On.
Off 00 0 Not waiting for on-line recovery.5
On 20 32 Waiting for on-line recovery.
6 - - - Undefined.
7 Off 00 0 Not used. Fixed to Off.
n = 2 : Off-line 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 Paper is not being fed by using the PAPER FEED
button.
3
On 08 8 Paper is being fed by the PAPER FEED button.
4 On 10 16 Not used. Fixed to On.
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.
7 Off 00 0 Not used. Fixed to Off.

Rev. 1.01 - 8 -
SRP-270
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 Off 00 0 No mechanical error.
On 04 4 Mechanical error occurred.
3 - - - Undefined.
4 On 10 16 Not used. Fixed to On.
6 Off 00 0 No auto-recoverable error.
On 40 64 Auto-recoverable error has occurred.
7 Off 00 0 Not used. Fixed to Off.
Bit 2 :
Bits 2 & 3 :
Bit 6 :
Mechanical errors include home position, carriage sensor, and slip ejection
errors.
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 ELE ENQ n(1 ≤n ≤2). If an
error due to a circuit failure (e.g. broken wire) occurs, it is impossible to
recover.
If the print head temperature becomes high, bit 6 is transmitted until the print
head temperature drops sufficiently. The printer automatically recovers from
this error.
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.
Off 00 0 Paper roll end sensor. Paper adequate.2
On 04 4 Paper roll end sensor. Paper end.
Off 00 0 Paper roll end sensor. Paper adequate.3
On 08 8 Paper roll end sensor. Paper end.
4 On 10 16 Not used. Fixed to On.
Off 00 0 Paper roll end sensor. Paper present.5
On 20 32 Paper roll end sensor. No paper.
On 00 0 Paper roll end sensor. Paper present.6
On 40 64 Paper roll end sensor. No paper.
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 after clearing the receive and print buffers.
This command is available only with a serial interface, and is ignored with
a parallel interface.

Rev. 1.01 - 9 -
SRP-270
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/160
inches.
ESC ! n
[Name]
[Format]
[Range]
[Description]
Select print mode(s).
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 Character font(9 ×9) selected.0
On 01 1 Character font(9 ×7) selected.
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.
* Determine the values of n by adding the value of all the characteristics
you want to select.
ESC % n
[Name]
[Format]
[Range]
[Description]
[Notes]
[Default]
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 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.
The user-defined character and the downloaded bit image cannot be
defined simultaneously.
n = 0

Rev. 1.01 - 10 -
SRP-270
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[x1d1…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 = 2, 32 ≤c1 ≤c2 ≤126
0 ≤x ≤12 (9x9 font)
0 ≤x ≤9 (7x9 font)
0 ≤d1 … d(y X x) ≤255
Defines user-defined characters.
- 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. For only one character, use c1 = c2.
- The allowable character code range is from decimal code 32 to 126.
The maximum number of user-define character is 95.
- x specifies the number of dots in the horizontal direction.
- d is the dot data for the characters. The dot pattern is on the horizontal
direction from the left side. Any remaining dots on right side are blank.
- The number of bytes required to download a character definition for one
character is “y” X “x”.
- 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.
- Independent downloaded character definitions are possible for each font.
The font is selected characters are cleared in the following circumstance.
1. When “ESC @” is executed
2. When deleted by “ESC ?”
3. When printer is reset or turned off
ESC * m nL nH d1…dk
[Name]
[Format]
[Range]
[Description]
Select bit-image mode.
ASCII ESC * mnLnHd1…dk
Hex 1B 2A mnLnHd1…dk
Decimal 27 42 mnLnHd1…dk
m = 0, 1
0 ≤nL ≤255
0 ≤nH ≤1
0 ≤d ≤255
Selects a bit-image mode using m for the number of dots specified by nL
and nH.
Horizontal Direction
m No. Vertical Dots Dot Density Adjacent dot Maximum number of dots
0 8 Single Density Permitted 180
1 8 Double Density Prohibited 360

Rev. 1.01 - 11 -
SRP-270
- The nL and nH indicate the number of dots of the bit image in the horizontal direction.
The number of dots is calculated by nL + nH x 256.
- If the bit-image data input exceeds the number of dots to be printed on a line, the excess
data is ignored.
- d indicates the bit-image data. Set a corresponding bit to 1 to print a dot or to 0 not to
print a dot.
- The relationship between the image data and the dots to be printed is as follows.
ESC - n
[Name]
[Format]
[Range]
[Description]
[Default]
Turn underline mode on / off.
ASCII ESC - n
Hex 1B 2D n
Decimal 27 45 n
n = 0, 1, 48, 49
Turns underline mode on or off, based on the following values of n :
n = 0
n Function
0, 48 Turns off underline mode.
0, 49 Turns on underline mode.
ESC 2
[Name]
[Format]
[Description]
Select default line spacing.
ASCII ESC 2
Hex 1B 32
Decimal 27 50
Sets the line spacing to 1/6-inch line spacing.
ESC 3 n
[Name]
[Format]
[Range]
[Description]
[Default]
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.
n = 24

Rev. 1.01 - 12 -
SRP-270
ESC <
[Name]
[Format]
[Description]
Return home.
ASCII ESC <
Hex 1B 3C
Decimal 27 60
Moves the print head to the standby position.
ESC = n
[Name]
[Format]
[Range]
[Description]
[Default]
Select peripheral device.
ASCII ESC = n
Hex 1B 3D n
Decimal 27 61 n
0 ≤n ≤253
Selects device to which host computer sends data, using n as follows :
n = 1
Bit Off/On Hex Decimal Function
Off 00 0 Printer Disabled.0
On 01 1 Printer Enabled.
1,2 - - - 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.
ESC D n1… nk NUL
[Name]
[Format]
[Range]
[Description]
Set horizontal tab positions.
ASCII ESC D n1…nkNUL
Hex 1B 44 n1…nkNUL
Decimal 27 68 n1… nk NUL
1 ≤n ≤255
0 ≤k ≤32
Sets horizontal tab positions.
* 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.

Rev. 1.01 - 13 -
SRP-270
ESC E n
[Name]
[Format]
[Range]
[Description]
Turn emphasized mode on / off.
ASCII ESC E n
Hex 1B 45 n
Decimal 27 69 n
0 ≤n ≤255 (Only the lowest bit of n is enabled)
Turns emphasized mode on or off.
* When the LSB of n is 0, emphasized mode is turned off.
* When the LSB of n is 1, emphasized mode is turned on.
ESC G n
[Name]
[Format]
[Range]
[Description]
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.
* 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.
ESC J n
[Name]
[Format]
[Range]
[Description]
Print and feed paper.
ASCII ESC G 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.
ESC K n
[Name]
[Format]
[Range]
[Description]
Print and reverse feed.
ASCII ESC K n
Hex 1B 4B n
Decimal 27 75 n
0 ≤n ≤255
Prints the data in the print buffer and feeds the paper n X vertical or
horizontal motion unit in the reverse direction.
ESC R n
[Name]
[Format]
[Range]
[Description]
[Default]
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

Rev. 1.01 - 14 -
SRP-270
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 Denmark1 10 Denmark2
ESC U n
[Name]
[Format]
[Range]
[Description]
Turn on / off unidirectional printing mode.
ASCII ESC U n
Hex 1B 55 n
Decimal 27 85 n
32 ≤n ≤255
Turns unidirectional printing mode on or off.
* When the LSB of n is 0, turns off unidirectional printing mode.
* When the LSB of n is 1, turns on unidirectional printing mode.
ESC a n
[Name]
[Format]
[Range]
[Description]
Select justification.
ASCII ESC a n
Hex 1B 61 n
Decimal 27 97 n
0 ≤n ≤2, 48 ≤n ≤50
Aligns all the data in one line to the specified position.
n selects the type of justification as follows.
n Justification
0,48 Leftjustification
1,49 Centering
2,50 Rightjustification
ESC c 3 n
[Name]
[Format]
[Range]
[Description]
[Default]
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.
This command is available only with a parallel interface and is ignored with
serial interface.
* Each bit of n is used as follows.
* This command is available only with a parallel interface and is ignored with
a serial interface.
Bit Off/On Hex Decimal Function
Off 00 0 Paper roll end sensor disable.0
On 01 1 Paper roll end sensor enable.
1,2 - - - Undefined.

Rev. 1.01 - 15 -
SRP-270
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 e n
[Name]
[Format]
[Range]
[Description]
Print and reverse feed n lines.
ASCII ESC e n
Hex 1B 65 n
Decimal 27 101 n
0 ≤n ≤2
Prints the data in the print buffer and feeds n lines in the reverse direction.
ESC m
[Name]
[Format]
[Description]
Executes partial cut.
ASCII ESC m
Hex 1B 6D
Decimal 27 109
Executes partial cut with one point uncut.
ESC p m t1 t2
[Name]
[Format]
[Range]
[Description]
Generate pulse.
ASCII ESC p mt1t2
Hex 1B 70 mt1t2
Decimal 27 112 mt1t2
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 Connectorpin
0, 48 Drawer kick-out connector pin 2
1, 49 Drawer kick-out connector pin 5

Rev. 1.01 - 16 -
SRP-270
ESC r n
[Name]
[Format]
[Range]
[Description]
Select print color.
ASCII ESC r n
Hex 1B 72 n
Decimal 27 114 n
n = 0, 1, 48, 49
Selects a print color, using n as follows.
n Print color
0,48 Black
1,49 Red
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, 254 ≤t1 ≤255
Selects a page n from the character code table.
n Page
0 0 (PC437 {USA, standard Europe})
2 2 (PC850 {Multilingual})
3 3 (PC860 {Portuguese})
4 4 (PC863 {Canadian-French})
5 5 (PC865 {Nordic})
19 19 (PC858 {Euro})
ESC u n
[Name]
[Format]
[Range]
[Description]
Peripheral status.
ASCII ESC u n
Hex 1B 75 n
Decimal 27 117 n
n = 0
Transmits the peripheral status (drawer).
After receiving this command, the printer transmits only 1 byte without
confirming the condition of the DSR signal.
Transmit data : 01H = drawer open.
00H=drawerclosed.
* This command is available only with a serial interface, and is ignored with a parallel
interface.

Rev. 1.01 - 17 -
SRP-270
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.
GS I n
[Name]
[Format]
[Range]
[Description]
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 :
n Printer ID Specification ID (hexadecimal)
1, 49 Printer model ID SRP-270 / SRP-270P 0DH
2, 50 Type ID See table below.
3, 51 ROM version ID ROM version
n=2, Type ID
Bit Off/On Hex Decimal Function
0 Off 00 0 Two-byte character code not supported.
1 Off 00 0 Auto cutter not equipped.
2, 3 - - - Undefined.
4 Off 00 0 Not used. Fixed to Off.
5, 6 - - - Undefined.
7 Off 00 0 Not used. Fixed to Off.
[Notes]
* When DTR / DSR control is selected, the printer transmits only 1 byte after confirming
that the host is ready to receive data (DSR signal is SPACE).
If the host computer is not ready to receive data (DSR signal is MARK), the printer
waits until the host is ready. When XON / XOFF control is selected, the printer transmits
only 1 byte without confirming the condition of the DSR signal.
* The printer ID is transmitted when the data in the receiving buffer is developed.
Therefore, there maybe a time lag between receiving this command and transmitting the
status, depending on the receive buffer status.
GS V m n
[Name]
[Format]
[Range]
[Description]
Feed paper for cutting position.
ASCII GS V m n
Hex 1D 56 m n
Decimal 29 86 m n
65 ≤m ≤66, 0 ≤n ≤255
Feed paper for cutting position as follows :

Rev. 1.01 - 18 -
SRP-270
m Print mode
65 Feeds paper (cutting position + [nX(vertical motion unit)]), and cuts the
paper Partially.
66 Feeds paper (cutting position + [nX(vertical motion unit)]), and cuts the
paper partially.
GS r n
[Name]
[Format]
[Range]
[Description]
Transmit status.
ASCII GS V n
Hex 1D 72 n
Decimal 29 114 n
1 ≤n ≤2, 49 ≤n ≤50
Transmits the status specified by n as follows.
n Print mode
1, 49 Transmits paper sensor status.
2, 50 Transmits drawer kick-out connector status.
Paper sensor status (n=1, 49)
Bit Off/On Hex Decimal Function
Off 00 0 Paper roll end sensor : paper adequate.
0 On 01 1 Paper roll end sensor : paper end.
Off 00 0 Paper roll end sensor : paper adequate.
1 On 02 2 Paper roll end sensor : paper end.
Off 00 0 Paper roll end sensor : paper present.
2 On 04 4 Paper roll end sensor : no paper present.
Off 00 0 Paper roll end sensor : paper present.
3 On 08 8 Paper roll end sensor : no paper present.
4 Off 00 0 Not used. Fixed to Off.
5, 6 - - - Undefined.
7 Off 00 0 Not used. Fixed to Off.
Bits 0 and 1 : The “paper roll end” detector is an option : on units that do not have this
detector, the “paper roll end” detector always indicates that paper
is present (bits 0 and i=1), whether or not it actually is.
Bit Off/On Hex Decimal Function
Off 00 0 Drawer kick-out connector pin 3 is LOW.
0 On 01 1 Drawer kick-out connector pin 3 is HIGH.
1-3 - - - Undefined.
4 Off 00 0 Not used. Fixed to Off.
5-6 - - - Undefined.
7 Off 00 0 Not used. Fixed to Off.