OM19X is a dot matrix impact printer that is available in 24 column, OM190,
and 40 column, OM192, models. It is compact and reliable with a variety
of features and options suitable for a wide array of applications including
medical and industrial instruments, point of sale, test and measurement,
security, time and attendance, etc.
1.1 Features
x Easy paper loading and ribbon replacement
x Serial RS-232C or Centronics parallel
x Multiple international character set
x Auto power off features.
x User selectable options stored in non-volatile ram.
x Watch dog software shuts off power to the print head and carriage motor in a
paper jam situation.
x Full96ASCII set(plus additional European/Chinese and scientific
characters).
x 32kbyte buffer.
x Double width printing.
x Double height printing.
x Underlining.
x Built-in tab stops.
x Vertical tab.
x Form feed.
x Self-test.
x Inverted printing (data mode only).
x Graphics.
x Reset command.
x Software diagnostic mode.
x DH technology 1000 emulation.
x Epson ESC/POS emulation.
x Citizen 560 emulation.
2. SPECIFICATIONS
2 -1. General specifications.
ModelOM190OM192
Print methodShuttle impact dot matrix (8 pins)
No. of columns2440
Printing speed2.5 lps1.7 lps
No. of dots per
line
Dot Size0.33 (H) x 0.38 (W) mm
Charactersize
(mm)
Line Spacing3 dot lines
Font size(5+1) x 7
InterfaceType S:RS-232C serial
EmulationEpson ESC/POS, Citizen 560,
Data buffer1 KB
Ink ribbonERC-09 or ERC-22 (Purple or black)
Paper
No. of copiesOriginal + 1 copy
Power supply
Dimensions (mm)178 (L) x 105 (W) x 82 (H)
Reliability (MCBF)1.5 million lines0.9 million lines
Weight400 gor0.88 lbs
Safety approvalsCE
Operating
condition
1.7 (W) x 2.6 (H)1.1 (W) x 2.6 (H)
144240
Type P:Centronics parallel
DH1000
Width57.5 r 0.5 mm
Diameter60 mm (Max)
9VDCr10% 2.0 A
0to50qC10to80%RH
(Operating)
2 -2. Printer types and models:
Printer types and models are selected according to the following designation:
X: Designates column capacity:024 columns
Y: Designates interface typeSSerial interface
OM19X
-Y-Z
240 columns
PParallel interface
3
4
Z: Designates input voltage for the external power adaptor
Use a paper roll that meets the specifications. Do not use paper rolls that are
glued to the core. Make sure data is not being transmitted to the printer while
loading paper.
`````
PUSH
ribbon
change
1. Cut the leading edge of the paper roll straight at a right angle, as shown
above.
2. Remove the old paper roll, if any, and press the FEED button until any
excess paper left in the mechanism is out. Do not pull the paper out of
the printer mechanism paper inlet.
3. Mount the paper roll on the paper roll holder by gently bending the plastic
tab, on the right, and insert the roll so that the holes in the core align with
the axes of the paper roll holder. Make sure that the two holders are
completely inside the core so that the paper roll can move freely without
much friction, i.e. the core inside diameter is larger than the paper roll
holder’s outside diameter.
7
4. Hold the both edges of the paper and insert it straight into the paper slot.
5. Press the FEED button until approximately two inches of paper is fed
through the mechanism.
6. Tear the excess paper against the serrated edge and close the cover.
7. Use the following Omniprint part number to reorder paper:
PP-225-1351 ply paper roll
PP-225-90WC2 ply paper roll
4.External Appearance.
Covertop
Paper cover
Control panel
Top cover
OnOff
Rollpaper
Roll paper
Paper roll holder
Bottom cover
8
Interface connector DC Jack
5. Control Panel
The control panel features four buttons and one LED to indicate printer status.
ON BUTTON: Press the ON button to power up the printer. A red LED inside
the button will light up. The printer goes ON LINE ready to receive data from the
host.
OFF BUTTON: Press the OFF button once to turn the power OFF.
FEED BUTTON: When the FEED button is pressed and then released within
0.5 sec., the paper feeds only one line. When the FEED button is held
depressed for more than 0.5 sec., the paper feeds continuously.
SEL BUTTON: The SEL button is used to change the printer setting. (Please
refer to the SET UP section for details)
STATUS LED: The LED is located inside the ON button and lights up when
power to the printer is on. The LED flashes every second when the printer head
jams and every 0.2 second in the case of mechanism malfunction.
9
6. Running the Self Test
Any time you want to check the performance of your printer you can run the self
test described below. This shows whether your printer is working correctly.
1. While holding down the FEED button, turn the printer on.
2. The printer prints the model name, EPROM revision installed, and a few
lines of the rotating character set.
3.The printer will automatically stop printing at the completion of the self
test and enter the normal mode.
NOTE: THE PRINTER WILL GO OFF LINE AND WILL NOT COMMUNICATE
WITH THE HOST WHILE IT IS IN SELF TEST MODE.
7. Default settings
Your printer is supplied with the following default setting.
DATA BITS8
P ARITYNONE
BAUD RATE9600
CHARACTER SETU.S.
PRINT MODETEXT
AUTO-OFF5MIN
EMULATIONSTANDARD
(ESC/POS)
DTRNORMAL
INTERFACESERIAL
The factory default settings can be restored by simultaneously pressing the
FEED and SEL buttons at power up. Releasing the FEED button before the SEL
button will save the revised settings.
8. Set-up mode
8.1 Set-up By Control Panel Buttons
You can change the printer serial interface, character table, emulation, and print
mode settings by following the procedure below:
10
1.By turning the power on while pressing the SEL button the printer will
print the current configuration and get in SET-UP mode.
2.The power LED will flash every second to indicate the printer is in SETUP m ode.
3.By pressing the FEED button, in SET -UP mode, you can scroll through
the printerparameters in the order shown in the table below.
4.Pressing the SEL button will cause the setting of a parameter to
change in the sequence shown below.
5.Once the desired setting is selected, it can be saved by pressing the
SEL button while pressing the FEED button.
NOTE: IF NO BUTTONS ARE PRESSED FOR 15 SECONDS, THE SET-UP
MODE IS AUTOMATICALLY TERMINATED WITHOUT CHANGING THE
ORIGINAL PARAMETERS.
PARAMET ER (FEED Button)STATUS (SEL Button)
8BIT DATANUMBER OF DATA BITS
7BIT DATA
SERIAL PARITY
SERIAL BAUD RATE
CHARACTER SET
AUTO POWER OFF
EMULATION
NO PARITY
ODD PARITY
EVEN PARITY
2400 BAUD
4800 BAUD
9600 BAUD
19200 BAUD
U.S.A.
FRANCE
GERMANY
U.K.
DENMARK I
SWEDEN
ITALY
SPAIN
JAPAN
NORWAY
DENMARK II
TEXT(NORMAL PRINT)PRINT MODE
DATA(INVERTED PRINT)
5MIN
1MIN
DISABLE
STANDARD(DH1000)
CITIZEN 560
ESC/POS
NORMALDTR
INVERTED
8.2 Set-up Through the Data Port
11
If the printer is turned on while pressing the SEL and FEED buttons,
simultaneously, and only the SEL button is released, the printer will print : “nvr
comms ready>”
At this point the printer is waiting to receive data in the following format : SETUP mode + Carriage Return +n1+…n10
(n1 to n10 are hex number) the SET-UP mode followed by a carriage return
indicates that the printer should expect parameter data as shown in the table
below.
Upon receiving information in the correct format, the printer will print : “data
ok,nvr updated !”.
Note : If no data is received within 15 seconds or the FFED button is released
before the procedure is complete, then the new setting will not be saved and the
printer will print : “set error nvr unchanged “.
To get in the diagnostic mode, perform self-test and keep pressing the FEED
button until “diagnostic modes” is printed. Press the FEED button to end. The
power-on indicator will flash every two seconds. Following is an example of the
diagnostic mode:
Abc de fg…….normal print
Abcide nfogm ……diagnostic print out
In the above example the following sequence of characters was sent :
Character f, single width(o),character g, carriage return(m).
Make sure the power supply cables are securely plugged into the printer, the
adapter, and the power outlet. Also, make sure that power is supplied to the
power outlet. If the outlet is controlled by a switch or timer, use another outlet.
1)IF THE POWER LED IS ON BUT PAPER DOES NOT FEED.
This may be a head jam condition, first turn off the printer and make sure there
is no paper stuck in the mechanism; however do not use force or a sharp object
to remove the jammed paper .
2)IF THE PAPER IS NOT FEEDING PROPERLY.
If the printout looks squashed, make sure that the paper roll moves freely on the
paper holder. If the paper is wrinkled on the edges, the roll may not loaded
correctly. In that case remove the paper and reload.
4) IF THE PRINTER SOUNDS LIKE IT IS PRINTING BUT NOTHING IS
13
PRINTED
Make sure a ribbon cartridge is installed properly that is not worn out. Please
note that the ribbon needs to be in front of the paper.
If the printout is faint, turn the knob on the cartridge in the direction of the arrow.
Also, see if the knob turns when the FEED button is pushed, if it does not, then
the advance gear on the ribbon or the mechanism may be defective or worn out.
3)IF THE PRINTER DOES NOT COMMUNICATE WITH THE HOST.
Run the self test to check that the printer works properly. If the self test does not
work contact your dealer or qualified service person. If the self test works
properly, check the following:
A. You are using the right interface cable.
B. The connection on both ends of the cable between the printer and
the host.
C. The data transmission setting may be different between the printer
and the host. Use the SET-UP instructions to change the settings, if
necessary.
4)IF A LINE OF DOTS IS MISSING IN THE PRINTOUT.
The print head may be damaged. Contact your dealer or qualified service
person.
11. Interface connections
The OM19 printer is available in RS-232C serial and Centronics compatible
parallel versions. The interface type is printed on the self-test printout. The
connector for the serial interface is a DB25 female and male for parallel.
11-1. SERIAL INTERFACE
11-1-1 Serial Interface Specifications
Data Transmission Method:Asynchronous serial interface
Baud Rate:User selectable from 2400, 4800, 9600, 19.2K
Word Length:Start bit1 bit
Data bit7 or 8 bit
ParityOdd, Even, None
Stop bit1 bit
Signal Polarity:MARK: Logic “1” (-10V)
SPACE: Logic “0” (+10V)
14
Input Control (DTR signal) :Mark: Data transmission not possible
Data Transmission Method:8 bit parallel, DATA0
Synchronization:Via e
Handshaking:ACK and BUSY signals
Data Transfer Rate:1000 to 6000 characters per second
Logic Level:Compatible with TTL level
11-2-2 Parallel Connector Pin Assignment
–DATA7
xternal STROBE pulses
15
PINFUNCTIONPINFUNCTION
1STROBE 14N.C.
2DATA 015N.C.
3DATA 116N.C.
4DATA 217N.C.
5DATA 318N.C.
6DATA419+9V
7DATA520+9V
8DATA621GND
9DATA722GND
10ACK23GND
11BUSY24GND
12N.C.25GND
13N.C.
Printer is capable of receiving data from the host while the BUSY signal is in the
LOW state and communication will be interrupted when the signal is HIGH>
12. COMMAND CODES
12.1 COMMAND SUMMARY FOR DH1000 EMULATION
FUNCTIONKEYSTROKEHEXDECIMAL
HORIZONTAL TABCTRL I09H9
LINE F EEDCTRL J0AH10
FORM FEEDCTRL K0BH11
VERTICAL TABCTRL L,n0CH,n12,n
CARRIAGE RETURNCTRL M0DH13
DOUBLE WIDTHCTRL N0EH14
SINGLE WIDTHCTRL O0FH15
RESETCTRL Q11H17
UNDERLINECTRL U15H21
UNDERLINE RELEASECTRL X18H24
16
REVERSE PRINTCTRL Y19H25
DOUBLE HEIGHTCTRL Z1AH26
GRAPHICSCTRL [,n1BH, n27,n
12.2 COMMAND SUMM ARY FOR EPSON ESC/POS EMULATION
FUNCTIONKEYSTROKEHEXDECIMAL
HORIZONTAL TABCTRL I09H9
LINE F EEDCTRL J0AH10
FORM FEEDCTRL L0CH12
GRAPHIC P RINTESC K1BH,4BH
PAGE LENGTH/FORMATESC C1BH,43H
PAGING IS OFFESC 01BH,4FH
2.75MM SPACINGESC11BH,31H
5.5MM SPACINGESC 21BH,32H
DOUBLE WIDTH1EH30
SINGLE WIDTH1FH31
COMMANDS
ACKNOWLEDGED
BUT NOT
EXECUYED
11.2 COMMAND DESCRIPTIONS
11.2.1 COMMAND DESCRIPTION FOR DH1000 EM ULATION
TAB(09H) : Moves the print position to the nest horizontal tab position. The default tab positions
are at every 8 character intervals. This command will be ignored unless the nest horizontal tab
position is set.
LINE FEED(0AH) : Prints the data in the print buffer and feeds one line based on the current
line spacing . IF LF+CR IS SENT, CR WILL BE IGNORED TO AVOID DOUBLE FEEDING.
FORM FEED(0BH) : The printer fast feeds to the top of form set by software. Any character in
the buffer will be printed and the buffer pointer will be reset.
VERTICAL TAB(0CH,N) : Printer feeds the paper by N lines. N is a single byte hex number in
the 0<n<20h range. Note that a vertical tab will print the contents of the line buffer before being
executed.
17
CR(0DH) : This command prints the data in the print buffer and feeds one line. If a LF is sent
immediately after CR, it will be ignored to avoid double printing. When the line buffer is full, ie
upon receiving the 24
th
and 40thcharacters in the case of OM190 and OM192, respectively, the
printer will automatically print the data in the buffer. If CR or LF is sent, they will be ignored in
this situation.
DOUBLE WIDTH(0EH) : Upon receiving this command the printer will go in the double wide
mode and remains in this mode until terminated by the single wide command or completion of
the current line. If the last character of a line is double wide but there is room only for a single
wide character, it will be printed in single width.
SINGLE WIDTH(0FH) : Printer reverts back to single width printing. Single and double wide
characters can be combined anywhere on a line.
RESET(11H) : This commands causes the printer to be set to power up default conditions.
NOTE THAT THIS WILL NOT CLEAR THE BUFFER OF ANY DATA PREVIOUSLY SENT.
UNDERLINE(15H) : Characters sent after this command will be underlined. Tabs are not
underlined. Underlining is terminated by the underline release command or upon completion of
the current line.
UNDERLINEL RELEASE(18H) : Terminates the underline mode.
REVERSE PRINT(1AH) : This command causes the printer to print white o n black. You can
toggle between reverse and normal anywhere on a line but the reverse print mode will
automatically be terminated at the end of a line.
DOUBLE HEIGHT(1AH) : Upon receiving this command the printer will go in the double high
mode and re mains in this mode until terminated by the single wide command or completion of
the current line.
NOTE THAT DOUBLE HEIGHT AND SINGLE HEIGHT CHARACTERS CANNOT BE
COMBINED ON THE SAME LINE.
GRAPHICS(1BH,N) : This command causes the printer to go in the bit image printing mode.
The number of graphic bytes sent will depend on the type of mechanism. For each graphic byte
sent to the printer, 6 out of 8 bits are used to form the graphic string (LSB is the right most dot).
N is the number of times the string will be repeated for a repetitive pattern, 0N255 lines. The
print buffer will be printed first if not empty.
EXAMPLE : TO REPEAT A S TRING OF DATA BYTES,D1----D24 OVER TWO ROWS FOR
OM190: SEND : 1BH,D1-------------D24. FOR A NON -REPEATED STRING SEND :1BH,01H,D1-
---D24.
11.2.2 EPSON ESC/POS COMMAND DESCRIPTION
TAB(09H) : : Moves the print position to the next horizontal tab position. The default tab
positions are at every 8 character intervals. This command will be ignored unless the nest
horizontal tab position is set.
LINE FEED(0AH) : Prints the data in the print buffer and feeds one line based on the current
line spacing . IF LF+CR IS SENT, CR WILL BE IGNORED TO AVOID DOUBLE FEEDING.
FORM FEED(0CH) : Prints the current line and feeds the number of lines programmed by using
the ESC C command.
18
CR(0DH) : This command prints the data in the print buffer and feeds one line. If a LF is sent
immediately after CR, it will be ignored t o avoid double printing.
ESC ! n(1BH,21H,n) : Sets the print mode according to the following table. n is a single byte in
which each bit sets the printing function. Note that underline cannot be used with a horizontal
tab and any combination of double height and width can be used. Default is n=0.
BitOff/OnHexDecim
Function
al
0,1,
---------Undefined
2
Off000Emphasizedmode
3
off
Off000Double-height off
4On1016Double-height on
Off000Double-width off
5
On2032Double-width on
6---------Undefined
Off000Underline mode off
7On80128Underline mode on
ESC @(1BH,40H) : Initialize the printer. C lears the print buffer and resets the printer to default
values.
ESC R n(1BH,52H,n) : Selects the international character set form the following table
nCharacter set
0U.S.A.
1France
2Germany
3U.K.
4Denmark I
5Sweden
6Italy
7Spain
8Japan
9Norway
10Denmark II
ESC d n(1BH,64H,n) : Prints the data in the print buffer and feed n lines.
ESC v(1BH,76H) : The current printer status is transmitted to the host upon receipt of this
command. The printer transmits one byte of data to the host indicating the status of the paper
out detector. It takes the form of a single byte which is fixed at 0(to indicate paper in) for printer.
The Byte is sent reg ardless of the CTS handshaking signal.
ESC { n(1BH,7BH,n) : Inverted print command. If n=1 then printing will be is inverted and text
will be printed from right to left. For normal printing n=0. The default mode is set by the
programmedparameters in the printer.
ESC C n(1BH,43H,n) : Set form length. When used in conjunction with the form feed
command(0ch), the printer will feed n l ines. NOTE THAT IF n=0,THEN THERE WILL BE N O
LINE FEED.
19
11.2.3 COMMAND DESCRIPTION FOR CBM560 EMULA T ION
LINE FEED (0AH) : Prints the data in the print buffer and feeds one line.
FORM FEED(0CH) : Form feeds after printing. This is fixed at three lines.
CR(0DH) : Feeds a new line after printing.
REVERSE PRINT(14H) : This command causes the printer to print white on black. You can
toggle between reverse and normal anywhere on a line but the reverse print mode will
automatically be terminated at the end of a line.
CLEAR BUFFER(18H) : All the data in the print buffer, received prior to this command, will be
cleared; however, this code is treated as data in the graphics mode.
DOUBLE WIDTH(1EH) : Upon receiving this command the printer will go in the double wide
mode and remains in this mode until terminated by the single wide or LF command or
completion of the current line. If the last character of a line is double wide but there is room only
for a single wide character, it will be printed in single width.
SINGLE WIDTH(1FH) : Printer reverts back to single width printing. Single and double wide
characters can be combined anywhere on a line.
APPENDIX 1. INTERNATIONAL CHARACTERS SET
20
APPENDIX 2. PRINTABLE CHARACTER SET
21
APPENDIX 3.EXTERNAL DIMENSIONS
22
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