❏No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any
means, electronic, mechanical, photocopying, recabling, or otherwise, without the prior written permission of
Seiko Epson Corporation.
❏The contents of this document are subject to change without notice. Please contact us for the latest information.
❏While every precaution has been taken in the preparation of this document, Seiko Epson Corporation assumes no
responsibility for errors or omissions.
❏Neither is any liability assumed for damages resulting from the use of the information contained herein.
❏Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties
for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or
abuse of this product or unauthorized modifications, repairs, or alterations to this product, or (excluding the U.S.)
failure to strictly comply with Seiko Epson Corporation’s operating and maintenance instructions.
❏Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options
or any consumable products other than those designated as Original EPSON Products or EPSON Approved
Products by Seiko Epson Corporation.
Trademarks
EPSON and ESC/POS are registered trademarks of Seiko Epson Corporation.
ESC/POS“ Command System
EPSON has been taking industry's initiatives with its own POS printer command system (ESC/POS). ESC/POS has a
large number of commands including patented ones. Its high scalability enables users to build versatile POS systems.
The system is compatible with all types of EPSON POS printers and displays. Moreover, its flexibility make it easy to
upgrade in the future. The functionality and the user-friendliness is valued from around the world.
Revision History
Rev.PageDetails of Change
Rev. AAll pagesNewly authorized
Rev. Ai
For Safety
Key to Symbols
The symbols in this manual are identified by their level of importance, as defined below. Read
the following carefully before handling the product.
WARNING:
You must follow warnings carefully to avoid serious bodily injury.
CAUTION:
Provides information that must be observed to prevent damage to the equipment or
loss of data.
❏Possibility of sustaining physical injuries.
❏Possibility of causing physical damages.
❏Possibility of causing information loss.
Note:
Provides important information and useful tips on handling the equipment.
ii Rev. A
TM-T88II/T88III Technical Reference Guide
Warnings
WARNING:
❏ Shut down your equipment immediately if it produces smoke, a strange odor, or
unusual noise. Continued use may lead to fire or electric shock. Immediately unplug
the equipment.
❏ Only disassemble this product as described in this manual. Do not make
modifications to the unit. Tampering with this product may result in injury, fire, or
electric shock.
❏ To avoid risk of electric shock, do not set up this product or handle cables during a
thunderstorm in order.
❏ Be sure to use the specified power source. Connection to an improper power source
may cause fire or shock.
❏ Never insert or disconnect the power plug with wet hands. Doing so may result in
severe shock.
❏ Do not allow foreign matter to fall into the equipment. Penetration by foreign
objects may lead to fire or electric shock.
❏ If water or other liquid spills into this equipment, turn off the power supply switch and
unplug the power cable immediately. Continued usage may lead to fire or electric
shock.
❏ Do not place multiple loads on power outlet. Overloading the outlet may lead to
fire. Always supply power directly from a standard 100 VAC domestic power outlet.
❏ Handle the power cable with care. Improper handling may lead to fire or electric
shock.
• Do not modify or attempt to repair the cable.
• Do not place any heavy object on top of the cable.
• Avoid excessive bending, twisting and pulling.
• Do not place the cable near heating equipment.
• Check that the plug is clean before plugging it in.
• Be sure to push the plug all the way in.
Cautions
CAUTION:
❏ Be sure to set this equipment on a firm, stable horizontal surface. Product may break
or cause injury if it falls.
❏ Do not use in locations subject to high humidity or dust levels. Excessive humidity and
dust may cause equipment damage, fire or shock.
Rev. Aiii
❏ Do not place heavy objects on top of this equipment. Never stand or lean on this
equipment. Equipment may fall or collapse, causing breakage and possible injury.
❏ To ensure safety, unplug this equipment prior to leaving it unused for an extended
period.
❏ Parts on the circuit board may become hot during operation. Wait approximately 10
minutes after turning the power off before touching them.
❏ To avoid injury, take care not to insert fingers or any part of the hand in the roll paper
opening where the manual cutter is installed.
❏ Do not open the roll paper cover without taking the necessary precautions, as this
can result in injury from the autocutter fixed blade.
❏ A needle for supplying ink to the printer is located inside the ink cartridge holder.
Inserting your fingers inside the ink cartridge holder may cause an injury.
Modular Connectors
The printer uses the modular connectors specifically designed for the cash drawer or customer
display. Do not connect these connectors to an ordinary telephone line.
iv Rev. A
TM-T88II/T88III Technical Reference Guide
About this Manual
This manual describes the TM-T88III, a current EPSON thermal printer product.
This manual also describes the TM-T88II, an obsolete product, for the purpose of supporting
legacy systems. The TM-T88II has been replaced by the newer TM-T88III. However, even
though the TM-T88II is no longer being sold, it is still in use by customers.
In addition, the power supply that was originally available for the TM-T88II printer, the PS-170,
is obsolete and no longer available. It is described only for legacy support. The currently
available power supply, the PS-180, works with either printer model.
Aim of the Manual
This manual was created to provide all the information necessary for system planning, design,
installation, and application of the printer for designers and developers of POS system.
Manual Content
The manual is made up of the following sections:
Chapter 1Product Overview
Chapter 2Setup
Chapter 3Application Development Information
Chapter 4ESC/POS Command-related Information
Chapter 5Product Specifications
Appendix AInterfaces and Connectors
Appendix BOptions and Consumables
Appendix CCharacter Code Tables
Appendix DTM-T88II/TM-88III Comparison Table
Related Software and Documents
Documents relating to the TM-T88II/TM-T88III are listed below.
Name of documentDescription
TM-T88II User’s Manual
TM-T88III User’s Manual
ESC/POS Application Programming GuideProvides detailed ESC/POS command information. Contact us
The TM-T88III thermal printer product is currently available from EPSON. The TM-T88II is an
obsolete product, which is described here for the purpose of supporting legacy systems.
In addition, the PS-170, the power supply for the TM-T88II printer, also is obsolete and no longer
available. It is described only for legacy support. The currently available power supply, the
PS-180, works with either printer model.
38400 is selected by setting DIP SW1-7
and 1-8 to ON. (See “DIP Switch
Functions” (page 2-3).)
Set with DIP SW2-5 *Cannot be changed.
11 pages including WPC 1252,
PC866 [Cyrillic #2], PC852 [Latin2])
Also can be operated by the driver for
the TM-T88II. Functions, however, are
restricted as follows:
• Some baud rates cannot be used in
serial communications (38400 bps,
2400 bps).
Note: The driver cannot set a
38400 bps baud rate. Selecting
a 2400 bps baud rate with the
driver will cause garbled
characters (the printer does not
support a 2400 bps baud rate).
2400, 4800, 9600, 19200
8 pages
—
* For details on the conditions for canceling the receive buffer BUSY state, refer to “DIP Switch Functions” (page 2-3).
1-2 Product OverviewRev. A
1.2 Part Names and Basic Operation
1.2.1 Part Names
Cutter cover
Power switch
Figure 1-1 Printer part names
TM-T88II/T88III Technical Reference Guide
Printer cover
POWER
ERROR
P
A
P
O
E
U
R
T
FEED
Control panel
Cover open button
* For details on DIP switch settings, refer to “DIP Switch Positions and Steps for Changing DIP Switch
Settings” (page 2-2).
1.2.2 Control Panel
POWER
ERROR
PAPER
OUT
FEED
Figure 1-2 Control panels for the TM-T88II (legacy model) and TM-T88III (current model)
TM-T88II
POWER LED
ERROR LED
PAPER OUT LED
FEED button
TM-T88III
POWER LED
ERROR LED
PAPER OUT LED
FEED button
Rev. AProduct Overview 1-3
1.2.2.1 LED
POWER LED (green)
❏ Lights when the power supply is on.
❏ Goes out when the power supply is turned off.
ERROR LED
Lights or flashes when the printer is offline.
❏ Lights after the power is turned on or after a reset (offline). Automatically goes out after a
while to indicate that the printer is ready.
Lights when the end of the roll paper is detected, and when printing has stopped (offline). If
this happens, replace with new roll paper.
❏ Flashes when an error occurs. (For details about the flash codes, refer to “Error Codes” (page
3-8).)
❏ Goes out during regular operation (online).
PAPER OUT LED
❏ Lights when there is no more roll paper or there is little remaining.
❏ Goes out when there is a sufficient amount of roll paper remaining.
❏ Flashes when a self-test is in progress or when the printer waits for a macro execution.
1.2.2.2 Buttons
PAPER FEED button
Pressing this button once feeds the roll paper by one line. Holding this button down feeds the
roll paper continuously.
1.2.3 Power Switch
The power switch is located at the bottom right front of the printer. (Refer to “Printer part
names” (page 1-3).)
Turn the printer on or off. The marks on the switch (0 = on / 1 = off) indicate the printer switch
position.
CAUTION:
Before turning on the printer be sure to check that the AC adapter is connected to the
power supply.
1-4 Product OverviewRev. A
TM-T88II/T88III Technical Reference Guide
1.2.4 Connectors
All cables are connected to the connector panel on the lower rear of the printer.
FG
Interface connector
Figure 1-3 Connector panel
Drawer kick-out connector
FG
DK
DC24V
Power supply connector
❏ Drawer kick-out connector for connecting the cash drawer
❏ Power supply connector for connecting the power supply unit
❏ Interface connector to connect the printer to the host computer interface (serial, parallel, etc.)
Note:
The picture above shows a serial interface model. For details on the various interfaces and how to connect
the power supply connector and cash drawer, see “Connecting Power Supply Unit and Cash Drawer”
(page 2-15) and “Connecting the Printer to the Host Computer” (page 2-8).
1.3 Handling the Printer
WARNING:
Do not open the printer cover during printing. Doing so may damage the printer.
Do not touch the manual cutter with your hands when installing or replacing roll paper.
The manual cutter is sharp and may cause an injury.
1.3.1 Selecting Paper Width
The customer can select either 58 mm {2.28"} or 80 mm {3.15"} paper. This option is performed at
the factory by installation of a spacer, as shown below.
Figure 1-4 Paper spacer
Rev. AProduct Overview 1-5
1.3.2 Installing and Replacing Roll Paper
FEED
FEED
Note:
Be sure to use roll paper that meets printer specifications. See Appendix B for details on the paper
specifications.
Do not use roll paper whose trailing end is glued to the roll paper core.
1.3.2.1 Installing Roll Paper
1. Make sure the host has not sent a printing command to the printer, and press the cover open
button to open the printer cover. If the printer cover does not open, a probable cause is that
the autocutter is locked. If this happens, refer to “Paper jam.”
P
O
W
E
E
R
R
R
O
R
PAPER
OUT
FEED
Figure 1-5 Cover open button
2. Load the roll paper.
POW
ER
ERRO
R
PAPER
OUT
FEED
Figure 1-6 Loading paper
Note:
When loading the roll paper, pay attention to the direction that the roll paper is fed out of the printer.
Figure 1-7 Paper direction
1-6 Product OverviewRev. A
TM-T88II/T88III Technical Reference Guide
FEED
FEED
3. Pull out the roll paper toward you.
4. Close the printer cover.
POWER
ERROR
PAPER
OUT
FEED
Figure 1-8 Closing the printer cover
5. Tear off the leading edge of the roll paper using the manual cutter.
P
O
W
E
E
R
R
R
O
R
PAP
O
ER
UT
FEED
Figure 1-9 Tear off paper
1.3.2.2 Replacing Paper
Follow the procedure below to replace roll paper.
1. Open the printer cover, and remove the core of the previously used roll paper.
2. Insert the new roll paper following the procedure in “Installing Roll Paper” (page 1-6).
1.3.3 Power Switch Cover
Install the power switch cover that comes with the TM-T88II/TM-T88III onto the printer to
prevent inadvertent changing of the power switch, to prevent tampering, and to improve the
appearance of the printer.
To reset the TM printer when the power switch cover is installed, insert a long, thin object (such
as the end of a paper clip) into the hole in the power switch cover and press the power switch.
Rev. AProduct Overview 1-7
1.3.4 Shipping Procedures
Do the following before shipping the printer.
1. Press the power switch to turn the power off.
2. Make sure the POWER LED is out.
3. Remove the power supply connector.
4. Pack the printer, keeping the top and bottom correctly oriented.
1-8 Product OverviewRev. A
TM-T88II/T88III Technical Reference Guide
Chapter 2
Setup
Before using the printer, you need to make various settings to increase the printer's
functionality. Configure the printer appropriately depending on the environment.
1. Install the printer (page 2-2)
Detailed setup
2. Set the DIP switches (page 2-2)
3. Set the roll paper near-end detector (page 2-7)
Note: Detailed setup sometimes
can be omitted.
4. Connect the printer to the host computer (page 2-8)
5. Connect the power supply and cash drawer (page 2-15)
6. Install the driver (page 2-16)
End
Figure 2-1 Setup flowchart
Rev. ASetup 2-1
2.1 Installing the Printer
In addition to regular horizontal installation, the printer can be hung on a wall using the
optional WH-10 Wall Hanging Bracket Set.
2.1.1 Precautions for Horizontal Installation
❏ Install the printer in a flat, horizontal position.
❏ Avoid locations susceptible to dust and other foreign matter.
❏ Be sure to avoid bumping so that the printer is not exposed to strong impact during
operation.
❏ Avoid placing the printer on top of the power supply or other cables or other objects.
2.1.2 Precautions for Wall Installation
❏ Make the following settings on the printer when you hang it on a wall. For details, refer to
the installation manual provided with the optional
•Install the roll paper stopper
•Adjust of near-end detector
•Install the WH-10
WH-10
Wall Hanging Bracket Set.
❏ For other details, refer to the installation manual provided with the optional WH-10 Wall
Hanging Bracket Set option.
2.2 Setting the DIP Switches
On this printer, you can make various settings with DIP switches.
Note:
Serial interface communication conditions must be set on serial interface model printers.
2.2.1 DIP Switch Positions and Steps for Changing DIP Switch Settings
Follow the steps below to change the DIP switch settings.
CAUTION:
Before you remove the DIP switch cover, turn the printer off. Otherwise, a short-circuit
may cause the printer to malfunction.
1. Make sure the power supply for the printer is turned off.
2-2 SetupRev. A
TM-T88II/T88III Technical Reference Guide
2. Unscrew the screw to remove the DIP switch cover from the base of the printer.
DSW1
DSW2
Figure 2-2 Removing the DIP switch cover
3. Set the DIP switches as desired, using the tip of a tool, such as a small screwdriver.
4. Attach the DIP switch cover, and screw in place.
Note:
New DIP switch settings are enabled after the printer is turned on.
2.2.2 DIP Switch Functions
The DIP switch functions depend on your printer’s interface specifications.
2.2.2.1 DIP switch settings for serial interface specifications
Note that the functions of DIP SW1-7, 1-8, and 2-5 differ on the TM-T88II and TM-88III. (The
functions of other DIP switch settings are the same.)
Note:
* Factory setting
Table 2-1 Switch bank 1 settings
SWFunctionONOFF
1-1Data receive errorIgnore“?” is printed *
1-2Receive buffer size45 bytes4KB *
1-3HandshakeXON/XOFFDTR/DSR *
1-4Bit length7 bits8 bits *
1-5Parity checkYesNo *
1-6Parity selectionEvenOdd *
,
1-7
1-8
Baud rate selection
(See the “Baud rate selection” tables below. (Note that the settings differ on the TM-T88II and TM-T88III.))
For details on DIP SW1-2: Receive buffer size, also refer to DIP SW2-5: Cancellation of receive buffer full BUSY state.
Rev. ASetup 2-3
Table 2-2 Baud rate selection (DIP SW1-7, 1-8)
TM-T88IITM-T88III
Baud rate
(BPS)
2400ONON38400ONON
4800OFFON4800OFFON
9600 *ONOFF9600 *ONOFF
19200OFFOFF19200OFFOFF
Switch no.
1-71-81-71-8
Baud rate
(BPS)
Switch no.
Table 2-3 Switch bank 2 settings
SWFunctionONOFF
2-1Handshake (BUSY) conditionsReceive buffer fullPrinter offline or
receive buffer full *
2-2Reserved (do not change setting)Fixed to OFF
2-3, 2-4Print density selection/low-power mode(See separate table.)
2-5Conditions for canceling receive buffer BUSY state (See separate table.)
2-6Reserved (do not change setting)Fixed to OFF
2-7Pin # 6 reset signalUsedNot used *
2-8Pin # 25 reset signalUsedNot used *
For details on DIP SW2-1: BUSY conditions, also refer to “Busy State” (page 3-11).
Table 2-4 Print density selection (DIP SW2-3, 2-4)
Switch No.
LevelPrint density
—Low-power modeONON
1Regular print density *OFFOFF
2
3Heavy print densityOFFON
↔
2-32-4
ONOFF
Table 2-5 Conditions for canceling receive buffer BUSY state (DIP SW2-5)
TM-T88IITM-T88III
Switch No.Conditions to cancel receive buffer
Conditions to cancel receive buffer
BUSY state
BUSY state canceled when 26 bytes or
more remain in receive buffer
2-52-5
Fixed to
OFF
BUSY state (enabled only when DIP
SW1-2 is OFF)
BUSY state canceled when 138 bytes
remain in receive buffer
BUSY state canceled when 256
bytes * remain in receive buffer
Switch No.
ON
OFF
2-4 SetupRev. A
TM-T88II/T88III Technical Reference Guide
Note:
With the TM-T88III, the DIP SW2-5 setting is enabled only when DIP SW1-2 is set to OFF and the
receive buffer is set to 4KB.
With the older TM-T88II model, be sure to set DIP SW2-5 to OFF before use. Otherwise, the printer may
no longer function correctly.
When the TM-T88II is used or when the TM-T88III is used with DIP SW1-2 set to ON, the BUSY state
is canceled when “26 bytes remaining in receive buffer” are reached, regardless of DIP SW2-5 setting.
Do not change the settings of DIP SW2-2 and SW2-6. Otherwise, the printer may no longer function
correctly.
2.2.2.2 DIP switch settings for other interface specifications
The following DIP switch functions are for parallel interface/USB/Ethernet model printers.
Note:
* Factory setting
Table 2-6 Parallel/USB/Ethernet DIP switch bank 1
SWFunctionONOFF
1-1 Automatic line feedEnabled at all timesDisabled at all times *
1-2Receive buffer size45 bytes4KB *
1-3, 1-8 Not defined
(Always use printer with these switches set to OFF.)
—— *
Table 2-7 Parallel/USB/Ethernet DIP switch bank 2
SWFunctionONOFF
2-1Handshake (BUSY conditions)
2-2Reserved (do not change setting)Fixed to OFF
2-3, 2-4Print density selection/low-power mode(See separate table.)
2-5Conditions for canceling receive buffer BUSY state(See separate table.)
2-6, 2-7Reserved (do not change setting)Fixed to OFF
2-8Pin #31reset signal (do not change setting)Fixed to ON
DIP SW2-1: For details on the BUSY condition, also refer to
“Busy State” (page 3-11)
• Receive buffer full• Offline *
.
• Receive buffer full
Rev. ASetup 2-5
Table 2-8 Selection of print density
Switch no.
LevelPrint density
1Low-power modeONON
2Regular print density *OFFOFF
3
4Heavy print densityOFFON
↔
2-32-4
ONOFF
Table 2-9 Conditions for canceling receive buffer BUSY state
TM-T88IITM-T88III
Conditions to cancel receive buffer BUSY
state
BUSY state canceled when 26 bytes or
more remain in receive buffer
Switch no.
2-52-5
Fixed to
OFF
Conditions to cancel receive buffer BUSY
state (enabled only when DIP SW1-2 OFF)
BUSY state canceled when 138 bytes
remain
BUSY state canceled when 256 bytes
remain *
Switch no.
ON
OFF
Note:
With the TM-T88III, the DIP SW2-5 setting is enabled only when DIP SW1-2 is set to OFF and the
receive buffer is set to 4KB.
With the TM-T88II, be sure to set DIP SW2-5 to OFF before use. Otherwise, the printer may no longer
function correctly.
When the TM-T88II is used or when TM-T88III is used with DIP SW1-2 set to ON, the BUSY state is
canceled when “26 bytes remaining in receive buffer” are reached regardless of the setting of DIP SW2-5.
Do not change the settings of DIP SW2-2 and SW2-6. Otherwise, the printer may no longer function
correctly.
2-6 SetupRev. A
TM-T88II/T88III Technical Reference Guide
FEED
2.3 Adjusting the Roll Paper Near-End Detector
Below are two situations where a roll paper NE detector adjustment is required.
❏ To adjust the detection position to suit the diameter of the roll paper core used.
❏ To adjust the detection position of remaining amount of paper.
Note:
Since roll paper cores vary slightly in shape, depending on paper roll design and manufacturing
tolerances, it impossible to detect the remaining paper exactly. Use roll paper with a core inner diameter of
12 mm {0.47"} and outer diameter of 18 mm {0.71"} so that the NE detector can detect the remaining
paper as accurately as possible.
Follow the procedure below to adjust the roll paper NE detector position.
1. Open the roll paper cover, and remove the roll paper.
2. Loosen the adjustment screw fastening the detector, and align the upper edge of the
positioning plate with the adjustment position. Adjustment positions are as follows:
Adjustment screw
Adjustment
position
UpperApprox. 27
LowerApprox. 23
Remaining amount of roll
paper (outer diameter: mm)
Positioning plate
Detection lever
Figure 2-3 NE detector positions
Note:
The adjustment screw is set to the lower position before shipment.
3. Tighten the adjustment screw.
4. After adjustment, make sure that the detection lever operates smoothly.
5. Load the roll paper.
6. Close the roll paper cover.
POWER
ERROR
PAPER
OUT
F
E
E
D
Rev. ASetup 2-7
2.4 Connecting the Printer to the Host Computer
2.4.1 Serial Interface Connection
2.4.1.1 Cross cable wiring diagrams
The wiring selections for available serial cross cables are as follows:
Figure 2-4 Cross cable diagrams
The cable needed depends on printer control and handshake method. You can operate the TM
printer with a Windows driver, OPOS, or ESC/POS commands. XON/XOFF, DTR/DSR, or
RTS/CTS are available as handshake controls. For details on available cables for each connection
form, refer to “Section 2.4.1.2, Serial interface connection diagrams.”
2.4.1.2 Serial interface connection diagrams
When the TM printer is connected to a host computer by the serial interface, the following two
connection forms are possible:
•Stand alone
•Pass-through connection
2-8 SetupRev. A
TM-T88II/T88III Technical Reference Guide
Stand alone
Both the TM printer and DM-D are connected to the host computer directly via the serial port.
Application
control
TM side
control setting
XON/XOFF 1Type A or B——
2DM-D500: A, B
DTR/DSR 1—Type A or BType B
2—Type A or BType B
XON/XOFF
(except OPOS)
Other DM-D: not possible
DTR/DSR
(DOS, OPOS, Visual C)
——
RTS/CTS
(DOS, Windows driver, Visual C,
Visual Basic MSComm)
Figure 2-5 Configuration of stand-alone connection
Pass-through connection
The host computer is connected to the TM printer over the serial interface via DM-D.
Application
control
TM side
control setting
XON/XOFFNot possible——
DTR/DSR 1—Type A or BType B
2—Type A or BType A or B
XON/XOFF
(except OPOS)
DTR/DSR
(DOS, OPOS, Visual C)
RTS/CTS
(DOS, Windows driver, Visual C,
Visual Basic MSComm)
Figure 2-6 Configuration of pass-though connection
Rev. ASetup 2-9
2.4.1.3 Connecting the serial interface (RS-232) cable
WARNING:
Be sure to turn off the power supply for both the printer and host computer before
connecting the cables.
1. Insert the interface cable connector firmly into the interface connector on the connector
panel.
2. When using connectors equipped with screws, tighten them to secure the connectors firmly.
Figure 2-7 Tighten screws
Note:
The printer comes with hex-head screws with inch-threaded holes installed. When using an interface
cable with metric-thread screws, use a hexagonal screwdriver (5 mm) to replace the installed screws
with hex-head screws with metric-threaded holes, also supplied.
Identified by encircling line mark
Inch-threaded hole
Metric-threaded hole
Figure 2-8 Hex-head screws threaded in inches and millimeters
3. When using interface cables equipped with a ground line, attach the ground line to the
screw hole marked “FG” on the printer.
4. Connect the other end of the interface cable to the host computer.
FG
Interface connector
Drawer kick-out connector
FG
DK
DC24V
Power supply connector
Figure 2-9 Printer connectors
2-10 SetupRev. A
TM-T88II/T88III Technical Reference Guide
2.4.2 Parallel Interface Connection
The parallel interface model TM printer is connected to the host computer via the parallel port.
When a customer display (DM-D) is to be connected, connect the TM printer to the host
computer via the serial port.
2.4.2.1 Parallel interface connection diagram
Figure 2-10 Parallel interface connection
2.4.2.2 Connecting the parallel interface cable
1. Insert the interface cable connector firmly into the interface connector on the connector
panel.
2. Press down the clips on either side of the connector to lock it in place.
3. When using interface cables equipped with a ground line, attach the ground line to the
screw hole marked “FG” on the printer.
4. Connect the other end of the interface cable to the host computer.
2.4.3 USB Interface Connection
Connect the TM printer to the host computer with a USB cable. A second TM printer can be
connected via a self-powered USB hub from a printer connected to the host computer.
Note:
A customer display (DM-D) can be connected to a USB model TM-T88II/T88III by the exclusive modular
cable (RJ-45). When connecting the customer display, connect the modular jack from the customer display
to the DM connector (refer to “Installing the locking wire saddle” (page 2-12)).
When connecting the customer display to a USB model TM-T88II/T88III, set the communication
conditions of the customer display as follows:
•Baud rate:19200 bps
•Bit length:8-bit
•Parity:no parity
•Stop bit:1
Rev. ASetup 2-11
2.4.3.1 USB Interface Connection Diagram
Example:
Figure 2-11 USB connection
2.4.3.2 Connecting the USB interface cable
1. Attach the locking wire saddle at the location shown in the figure below.
2. Put the USB cable through the locking wire saddle as shown in the figure below.
Note:
Putting the USB cable through the locking wire saddle, as shown in the figure below, prevents the
cable from coming unplugged.
USB upstream connector
USB downstream connector
DM connector
UB-board
Locking wire saddle
USB cable
Figure 2-12 Installing the locking wire saddle
3. Connect the USB cable from the host computer to the USB upstream connector.
4. Up to 2 USB devices can be connected to a USB model TM-T88III/T88III by using 2 USB
downstream connectors.
Note:
The hub installed in a USB model connector panel is a bus-power-supply hub. It is important to note
that bus-power-supply hubs (including other USB model TM printers) and bus-power-supply
functions with a current consumption of 100 mA or more cannot be connected directly to the printer.
2-12 SetupRev. A
TM-T88II/T88III Technical Reference Guide
To use USB model TM printers, the TM printer driver (EPSON OPOS ADK or advanced printer
driver) must be installed on the host computer. Get the latest driver information from one of the
following URLs:
For customers from North America, go to the following web site: http://pos.epson.com/
For customers from other countries, go to the following web site:
http://www.epson-pos.com/
Select the product name from the “Select any product” pull-down menu.
For details on EPSON OPOS ADK or
advanced printer driver, refer to “Introducing the Control
Methods” (page 3-1).
2.4.4 Ethernet Interface Connection
Connect a TM printer with an Ethernet interface to a network by an Ethernet cable via a hub.
2.4.4.1 Ethernet Interface Connection Diagram
Example:
Figure 2-13 Ethernet connection
Note:
When a TM printer is connected to the host computer via a network interface, a customer display (DM-D)
cannot be connected to the TM printer. If a customer display must be connected, connect it to the host
computer’s serial interface.
Rev. ASetup 2-13
2.4.4.2 Connecting the Ethernet Interface Cable
1. Make sure the power supplies for both the printer and host computer have been turned off.
2. For 10Base-T or 100Base-TX Ethernet, connect a 10Base-T or 100Base-TX cable to the
10Base-T/100Base-TX Ethernet connector by pressing firmly until the connector clicks into
place.
10Base-T/100Base-TX Ethernet
interface connector
LED (green)
LED (yellow)
Figure 2-14 Example Ethernet port interface panel (UB-E02)
Switch
Drawer kick-out
connector
Printer power supply
connector
CAUTION:
Connecting devices directly to LAN cables installed outdoors exposes them to damage
from power surges caused by lightning and other inductive sources. Make sure devices
without proper surge protection are cushioned by being connected through devices
that do have surge protection. Otherwise, do not connect them to outdoor lines.
Never attempt to connect the customer display cable, drawer kick-out cable, or the
standard telephone line cable to the 10Base-T/100Base-TX Ethernet connector.
Note:
To use the Ethernet interface, the separate IP Address Setup Utility for the UB-E02 is required. For
details on the various setup methods, refer to “UB-E02 Technical Reference Guide.” You can obtain
the “IP Address Setup Utility for UB-E02” and the “UB-E02 Technical Reference Guide” from one of
the following URLs:
For customers from North America, go to the following web site: http://pos.epson.com/
For customers from other countries, go to the following web site:
http://www.epson-pos.com/
Select the product name from the “Select any product” pull-down menu.
Other compatible Ethernet interface modules may be available for your printer. Contact your EPSON
dealer for information on the options available.
2-14 SetupRev. A
TM-T88II/T88III Technical Reference Guide
2.5 Connecting Power Supply Unit and Cash Drawer
Always use one of the following power supplies: the EPSON PS-180 (the currently available
power supply that can be used with either the TM-T88III or the TM-T88II); the PS-170 (the legacy
power supply used with the TM-T88II printer when that model printer was available); or use an
equivalent product as the power supply unit.
Use the cash drawer handled by EPSON or your dealer.
WARNING:
Always use the EPSON PS-180, the preceding model, the PS-170, or an equivalent
product as the power supply unit. Using a nonstandard power supply can result in
electric shock and even fire.
Should a fault ever occur in the EPSON PS-170, PS-180, or equivalent product,
immediately turn off the power to the printer and remove the power supply cable from
the wall socket.
2.5.1 Connecting the Power Supply Unit
1. Make sure the printer’s power supply is turned off and the power supply unit’s power cable
has been removed from the wall socket.
2. Check the specifications label on the power supply unit to confirm that the wall socket
power supply meets the rated voltage requirements.
3. Insert the connector of the power supply cable onto the power supply connector (labeled
DC24V).
Power supply
FG
Figure 2-15 Connecting the power supply
FG
DK
DC24V
connector
CAUTION:
Be sure to remove the power supply unit’s cable from the wall socket whenever
connecting or disconnecting the power supply unit to the printer. Failure to do so may
result in damage to the power supply unit or the printer.
Make sure the wall socket power supply satisfies the rated voltage requirements of the
power supply unit. Never insert the power supply cable plug into a socket that does not
meet the rated voltage requirements of the power supply unit. Doing so may result in
damage to both the power supply unit and the printer.
Rev. ASetup 2-15
Note:
Before removing the DC cable connector from the EPSON PS-180 (current model power supply) or the
PS-170 (legacy model), make sure the power supply cable has been removed from the power supply unit,
then grasp the arrow-marked section of the connector and pull straight out.
2.5.2 Connecting the Drawer Kick-out Cable
WARNING:
Prepare a drawer that meets printer specifications. Otherwise, the drawer kick-out
solenoid or other parts in the drawer might burn and cause a fire. This may also cause
the printer to malfunction at the same time.
Do not insert a telephone line into the drawer kick-out connector. Doing so may
damage the telephone line or printer.
Connect the connector of the drawer kick-out cable to the printer.
Figure 2-16 Connecting the drawer-kick cable
2.6 Installing the Driver
To use the TM printer, either the Advanced Printer Driver (APD) (Windows driver) or the
EPSON OPOS ADK (OCX driver) must be installed. For an outline of each driver, refer to
“Introducing the Control Methods” (page 3-1). For details on installation methods, refer to the
manual for the respective driver.
Note:
The TM-T88III also can be operated using the driver for TM-88II. Functions, however, are restricted as
follows:
• The maximum print speed is restricted to 120 mm/s {4.72"/s} or less.
•Some baud rates (38400, 2400 bps) are not available in serial communications.
ESC/POS commands are also available for directly controlling the printer without the user of a driver. For
details on ESC/POS commands, also refer to “ESC/POS Commands” (page 3-5).
2-16 SetupRev. A
TM-T88II/T88III Technical Reference Guide
Chapter 3
Application Development Information
This chapter describes how to control the printer and gives information useful for printer
application development.
3.1 Introducing the Control Methods
The TM printer can be controlled and can print using any of the following 3 methods.
1. Windows printer driver (EPSON Advanced Printer Driver or APD)
2. EPSON OPOS ADK
3. ESC/POS commands
Depending on the driver and interface used, the IP setup tool for the Ethernet model, USB
device driver, logo printing registration utility (TMFlash logo utility), etc. are available. Get the
latest information from one of the following URLs:
For customers from North America, go to the following web site: http://pos.epson.com/
For customers from other countries, go to the following web site:
http://www.epson-pos.com/
Select the product name from the “Select any product” pull-down menu.
3.1.1 Windows Driver (EPSON Advanced Printer Driver)
The EPSON Advanced Printer Driver provides the TM printer with satisfactory control as a
Windows driver.
3.1.1.1 EPSON Advanced Printer Driver overview
EPSON Advanced Printer Driver has the following features:
❏ Supplies a Windows printer driver for the TM printer to enable printing from a general
Windows application.
❏ Can execute POS printer-specific functions, such as cutting paper and opening a drawer.
❏ Can print printer-resident fonts by selecting the font type.
❏ Can get the printer status using programming languages, such as Visual Basic (VB), via
status API. This uses the printer’s bidirectional communication capability in the Windows
standard printer driver operating environment.
Note:
The status API is a printer control API originally supplied by EPSON. This can be used to get the printer
status and send ESC/POS commands.
Rev. AApplication Development Information 3-1
3.1.1.2 EPSON Advanced Printer Driver contents
The installer automatically evaluates the target PC environment and automatically installs the
DLL and software components necessary for operation. You can select the drivers, sample
programs, and manuals to be installed.
❏ Drivers
You can select the driver, based on its purpose (drivers also can be installed simultaneously),
including two-color printing, smoothing, continuous printing, cutting method options, and
other functions.
•Receipt: For receipt printing
•Reduce 35: Reduces A4 vertical size 35% to enable printing on 80 mm {3.15"} -wide
receipts
❏ Sample programs
You can install sample programs in Visual Basic and Visual C++ to use status API.
❏ Manuals
The following manuals can be installed:
•User's manual (for developers)
•Engineering data for each status
•Main function control methods (for WordPad and VB)
3.1.1.3 EPSON Advanced Printer Driver support environment
❏ Supported interfaces
•Serial, parallel, USB, Ethernet
❏ Supported operating systems (with confirmation of system operation)
•Windows 95 Standard, OSR 2.5
•Windows 98 Second Edition
•Windows NT Ver. 4.0 SP5, SP6
•Windows 2000 Professional
•Windows XP Professional
Refer to the release note for the driver for the latest information.
❏ Supported development languages
•Visual Basic
•Visual C++
❏ Supported devices
Refer to the release note for the driver for details on available equipment.
•EPSON receipt printer
3-2 Application Development InformationRev. A
TM-T88II/T88III Technical Reference Guide
•EPSON customer display
•EPSON cash drawer
Note:
A separate USB device driver is required for a USB model printer, and a separate IP setup utility is
required for an Ethernet model printer. See the manual packed with the APD.
When you use the APD for the TM-T88III serial model or the TM-T88II, using TrueType fonts may slow
printing down, due to the speed of communication between the printer and host computer. If this happens,
we recommend using printer-resident fonts. For details on how to use resident fonts, see the user's manual
for the APD.
Printing with TrueType fonts on other interfaces may have a slight influence on customer applications. In
that case, use the printer-resident fonts. Because of the restrictions of some customer applications, when
the APD is used with that application, resident fonts sometimes cannot be used, even if they are specified.
When OPOS is used, this problem does not arise because only the printer-resident fonts are available.
3.1.1.4 Driver information and download destination
Get the latest driver information from one of the following URLs:
For customers from North America, go to the following web site: http://pos.epson.com/
For customers from other countries, go to the following web site:
http://www.epson-pos.com/
Select the product name from the “Select any product” pull-down menu.
3.1.2 EPSON OPOS ADK
The EPSON OPOS ADK supports the development environment required for OPOS application
development using OPOS Control as described by the OLE for Retail POS (simply called
“OPOS” from here on) Technology Association to supply the OPOS-compliant printer driver
(OCX). Use this control method to develop OPOS-compliant applications. EPSON’s OPOS ADK
has the following features:
❏ The EPSON OPOS ADK comprehensively supports the development environment required
for OPOS application development at customer sites, including not only OPOS Control
(CO + SO) proposed by the OPOS Association, but also the contents necessary for
development, ranging from the installers and setup utilities to sample programs and
manuals, and the function for getting logs for debugging, and silent installation that
achieves ease of installation on a target PC.
❏ The EPSON OPOS ADK reduces the man-hours for application development, since it
handles the following functions that application developers up till now have had to
consider. The functions are supported by EPSON-original Direct IO with parameters,
power-on notification, offline buffer clear processing, and so on.
Note:
For details on the API functions, refer to the “Application Programmers Guide Specification” provided by
the OLE POS Technology Association.
Rev. AApplication Development Information 3-3
3.1.2.1 EPSON OPOS ADK (OPOS Control) overview
OPOS Control included with the EPSON OPOS ADK has the following features:
❏ Supplies the CO for each device class and SO for EPSON devices.
❏ Direct IO with parameters available:
•Gets the printer maintenance counter value
•Prints NVRAM-stored bit images, etc.
❏ Power-on notification function (at power on, this function automatically restores the printer
to the state that was active before power off).
❏ Offline buffer clear processing (clears the print buffer contents in offline mode).
❏ Debugging function (trace function):
•Obtains a log between the application and CO (target: used API and its return value)
•Device status acquisition log (gets the offline and error causes that actually occurred in
the devices)
3.1.2.2 EPSON OPOS ADK contents
The installer of the EPSON OPOS ADK, Ver. 2.10 or later, has a silent installation function,
which can install the OPOS environment without a user interface and facilitate installation. With
the installer, the following OPOS-compliant OPOS Control for EPSON devices, manuals,
various utilities, and sample programs can be installed.
❏ OPOS Control for EPSON devices
Header files for CO, SO, C++, header files for VB, TLB file of CO, device information files, etc.,
can be installed.
❏ Manuals
•User's guide (environment construction manual: installation/uninstallation, usage
methods for various utilities)
•Application Development Guide (manual for OPOS-compliant application developer:
common manual, manual for each device)
❏ Various utilities
• SetUpPOS utility
Facilitates selection of equipment and connection ports and various settings
(print wait time, etc.).
•TM Flash logo utility
Saves a bitmap file to the printer or customer display, for example.
•USB device driver
This driver is necessary to connect a USB model printer.
3-4 Application Development InformationRev. A
•Sample programs
Sample programs for VB, VC++ can be installed.
3.1.2.3 EPSON OPOS ADK support environment
❏ Supported interfaces
•Serial, parallel, USB, Ethernet
❏ Supported OSes (with confirmation of system operation)
•Windows 95 Standard, OSR 2.5
•Windows 98 Second Edition
•Windows NT Ver. 4.0 SP5, SP6
•Windows 2000 Professional
•Windows XP Professional
Refer to the release note of the driver for the latest information.
❏ Supported development languages
TM-T88II/T88III Technical Reference Guide
•Visual Basic
•Visual C++
3.1.2.4 Driver information and download destination
Get the latest driver information from one of the following URLs:
For customers from North America, go to the following web site: http://pos.epson.com/
For customers from other countries, go to the following web site:
http://www.epson-pos.com/
Select the product name from the “Select any product” pull-down menu.
3.1.3 ESC/POS Commands
To directly control the TM printer using ESC/POS commands, EPSON proposes printing/
control via ESC/POS commands. The printer can be controlled directly by sending ESC/POS
commands from an application to the printer. For detailed information about ESC/POS
commands, please contact EPSON or your dealer.
Rev. AApplication Development Information 3-5
3.1.4 Various Utilities
We provide the utilities described below for developers of TM printer applications. You can
obtain the utilities from one of the following URLs:
For customers from North America, go to the following web site: http://pos.epson.com/
For customers from other countries, go to the following web site:
http://www.epson-pos.com/
Select the product name from the “Select any product” pull-down menu.
3.1.4.1 IP address setup utility for UB-E02
This utility and its detailed manual for developers allow you to set an IP address for a 10Base-T/
100Base-TX Ethernet interface installed in the TM printer. Customers who have purchased the
Ethernet model TM printer need this utility.
3.1.4.2 Electronic logo storage utility for NVRAM
This utility is designed to save logos (bitmaps) to NVRAM (non-volatile RAM). By storing shop
logos to NVRAM, the print speed can be increased.
3.1.4.3 USB interface ID code rewrite utility
This utility is designed to edit the identification code (ID) of a USB interface.
Note:
Each USB model TM printer has its own ID. So, two TM-88IIIs can be controlled independently from a
host computer. Therefore, when replacing a TM printer that has been connected to a host computer with
another printer (including same model), you must change the USB port in the printer driver on the host
computer. Use of this utility, for example, frees you from changing the USB port in the printer driver.
3.2 Switches and Buttons
On this printer, you can disable or enable the paper FEED button. For details on how to switch
between disabled or enabled, refer to the documentation for OPOS Advanced Printer Driver and
ESC/POS commands, respectively.
3.2.1 Paper FEED Button
The printer feeds paper based on the line spacing set by the control method (OPOS, Advanced
Printer Driver, ESC/POS commands). However, you cannot feed paper using the paper FEED
button under the following conditions:
•When the roll paper cover is open.
•When performing a self-test (Press the FEED button to stop the self-test and press it again
to resume it).
•When the paper FEED button has a function defined in a macro definition command
(when ESC/POS commands are used).
3-6 Application Development InformationRev. A
3.3 Panel LEDs and Error Status
3.3.1 Power LED
Table 3-1 Power LED
ItemSpecifications
LED colorGreen
LED statesOffPower is not supplied.
OnPower is supplied.
3.3.2 No Roll Paper (PAPER OUT) LED
Table 3-2 No roll paper (PAPER OUT) LED
ItemSpecifications
LED colorRed
LED statesOffRoll paper is loaded.
OnA roll paper near end or paper end is detected.
FlashingSelf-test standby state or standby state when a macro execution command is used.
TM-T88II/T88III Technical Reference Guide
Note:
The macro function is available only when ESC/POS commands are used.
3.3.3 Error LED
Table 3-3 Error LED
ItemSpecifications
LED colorRed
On statesOffPrinter is performing regular operations or is online.
OnOffline (excluding self-test with the paper FEED button).
FlashingError state.
Rev. AApplication Development Information 3-7
3.3.3.1 Error Codes
A
160
There are three possible error types: automatically recoverable errors, recoverable errors, and
unrecoverable errors.
❏ For automatically recoverable errors, the user does not have to take any action. The error
recovers automatically when the head temperature returns to normal or the cover is
correctly closed.
❏ A recoverable error recovers by resetting the printer or sending a command from the driver
after the cause of the error is eliminated.
❏ For unrecoverable errors, the printer or the power supply may be malfunctioning and must
be repaired.
Automatically recoverable errors
Although normal printer operation is no longer possible when automatically recoverable errors
occur, they do not represent printer failure. They can be recovered easily, as described below.
Table 3-4 Automatically recoverable errors
ErrorError descriptionError LED flash codeRecovery measure
Approx. 160 ms
Roll paper cover
open error
Print head
temperature error
The roll paper cover was
opened during printing.
A high temperature outside
the head drive operating
range was detected.
Recovers automatically
when the roll paper cover
is closed.
Recovers automatically
when the print head cools.
Note:
If the temperature cannot be detected correctly, a drive circuit error occurs.
Recoverable errors
Although normal printer operation is not possible after a recoverable error occurs, this is not a
printer malfunction. These errors can be recovered easily by turning the power on again or
sending an error recovery command from the driver after eliminating the cause of the error.
Table 3-5 Recoverable errors
ErrorError descriptionError LED flash codeRecovery measure
Autocutter errorAutocutter does not work
correctly.
pprox.
ms
Remove the jammed paper or
foreign matter in the printer,
close the roll paper cover, send
the error recover command, or
turn the power on to recover.
3-8 Application Development InformationRev. A
TM-T88II/T88III Technical Reference Guide
Note:
The error recovery command is valid only if a recoverable error (excluding automatically recoverable
errors) occurs. If a recoverable error occurs, the printer recovers from the error upon receipt of an error
recovery command from the driver after the cause of the error is eliminated. Turning the printer’s power
off and on is not required.
Unrecoverable errors
Normal printer operation is no longer possible when unrecoverable errors occur. The printer
must be repaired.
Table 3-6 Unrecoverable errors
ErrorError descriptionError LED flash codeRecovery measure
Approx. 160 ms
Memory R/W errorAfter R/W checking, the printer
does not work correctly.
High voltage errorThe power supply voltage is
extremely high.
Low voltage errorThe power supply voltage is
extremely low.
CPU execution errorThe CPU is executing an
incorrect address.
Drive circuit errorThe reaction of the drive circuit
is abnormal.
Note:
When an unrecoverable error occurs, turn off the power supply immediately.
Impossible to
recover
Impossible to
recover
Impossible to
recover
Impossible to
recover
Impossible to
recover
Rev. AApplication Development Information 3-9
3.4 Sensors
3.4.1 Paper Sensors
The printer has two paper sensors.
3.4.1.1 Roll paper near-end sensor
The roll paper near-end sensor uses the diameter of the roll paper to detect whether the
remaining paper is getting low. This sensor is located inside the roll paper supply unit, and you
can fine-tune the amount of remaining paper detected by this sensor. (For details on adjustment,
see page 2-7.)
Lighting of the PAPER OUT LED in a near-end state does not indicate an error. Regular printing
is possible.
Note:
Detection of the near-end status does not necessarily indicate the complete end of the roll paper. Use the
sensor as an indication of when to replace the roll paper.
By changing the driver setting, a print job can be canceled automatically during the near-end status.
3.4.1.2 Roll Paper End Sensor
The roll paper end sensor detects whether there is paper in the paper path. When there is no
paper (paper end status), the PAPER OUT LED and ERROR LED light to indicate an error has
occurred. If the sensor detects a roll paper end, the printer stops printing, even in the process of
printing. We recommend that you mainly rely on the roll paper near-end sensor and use the roll
paper end sensor secondarily.
3.4.2 Printer Cover Sensor
3.4.2.1 Roll Paper Cover Open Sensor
The cover-open sensor monitors the roll paper cover. When the sensor detects an open cover
during printing, the printer stops printing immediately and automatically goes offline.
This status is treated as an automatically recoverable error, and the ERROR LED flashes. When
the printer cover is closed, the ERROR LED goes out, and the printer goes online and starts
printing at the beginning of the line it was printing when the cover was opened.
When the printer recovers, it feeds paper to take up slack and starts printing from the beginning
of the line where the error occurred. In this case, double printing and printing position shift may
occur. When a cover open error occurs, we recommend clearing the printer’s print buffer by
sending the error recovery command from the driver, and resending the print data.
Note:
Whether the cover is open or not does not affect the status reported by the roll paper end sensor.
3-10 Application Development InformationRev. A
TM-T88II/T88III Technical Reference Guide
3.4.3 Offline
This printer is not equipped with an online/offline switch. The printer automatically goes
offline under the following conditions:
•During power on (including resetting with the interface) until the printer is ready
•When the printer is waiting to receive data
•During the self-test
•When the roll paper cover is open
•During paper feeding using the paper FEED button
•When the printer stops printing due to a paper-end (if an empty paper supply is
detected by the roll paper end sensor or if the driver has been set to stop printing when a
roll paper near-end is detected)
•When an error has occurred
•During macro executing standby status
3.4.4 Busy State
3.4.4.1 Selecting conditions for invoking a BUSY state
With DIP SW2-1, you can select conditions for invoking a BUSY state as either of the following:
❏ When the receive buffer is full
❏ When the receive buffer is full or the printer is offline
Note:
In either case above, the printer enters the BUSY state after power is turned on (including resetting with
the interface), while the printer is in the standby state waiting for data, and when a self-test is being run.
For details on how to change the DIP switch setting for receive buffer full, see “Setting the DIP Switches”
on page 2-2.
You do not need to change this item when using OPOS or the Advanced Printer Driver.
Table 3-7 Printer BUSY conditions and status of DIP SW2-1
DIP SW2-1 status
Printer status
OfflineDuring the period after power is turned on (including resetting with
the interface) to when the printer is ready to receive data.
During the self-test.BUSYBUSY
When the cover is open.—BUSY
During paper feed with the paper FEED button.—BUSY
When the printer stops printing due to a paper-end (when printer has
run out of roll paper).
When an error has occurred.—BUSY
When the receive buffer is fullBUSYBUSY
ONOFF
BUSYBUSY
—BUSY
Rev. AApplication Development Information 3-11
Note:
When DIP SW2-1 is ON, the printer will not become BUSY even if printer hardware stops operating.
•When an error has occurred
•When the cover is open
•When printing has stopped for a paper out
•When paper is fed by the paper FEED button
3.5 NVRAM (Non-volatile Memory)
NVRAM is mounted on this printer, and bitmap images (for example, business logos) or other
data are written to it. Pay attention to the following when using NVRAM.
❏ The following restriction applies when performing operations (including storing and
deleting data) in NVRAM.
•Do not use the paper FEED button.
❏ The printer sometimes enters the BUSY state when data is being written to NVRAM. It is
important not to send data from the host computer while the printer is in the BUSY state,
because the printer cannot process any received data.
❏ Frequent use of the functions for writing data to and deleting data from NVRAM may
damage the memory. As a rule, in using the various commands to write to NVRAM, avoid
writing more than an average of ten times per day.
3.6 Bar Code Printing
This printer can print the following types of bar codes:
UPC-A, UPC-E
JAN 8 (EAN 8), JAN 13 (EAN 13)
CODE 39
ITF (Interleaved 2 of 5)
CODABAR (NW-7)
CODE 93
CODE 128
To set and print each bar code, refer to the OPOS, Advanced Printer Driver, and ESC/POS
command documentation, respectively.
3-12 Application Development InformationRev. A
TM-T88II/T88III Technical Reference Guide
3.7 Operating Mode (Switch Panel Operation)
The printer has a self-test mode to check printer settings in addition to the regular print mode.
3.7.1 Self-test Mode
In the self-test mode, the following items are checked and printed out:
•Control circuit functions
•Printer mechanism functions
•Print quality
•Control software ROM version
•DIP switch settings
Follow the steps below to start a self-test:
1. With the roll paper cover open, press and hold down the paper FEED button and turn on the
printer. The printer prints various printer settings.
2. When the printer finishes printing the printer status, check whether the following message is
printed:
“SELF-TEST printing. Please press PAPER FEED button”
The printer is now in the self-test wait mode.
3. To start a test print, press the paper FEED button while the printer is in the self-test wait
mode.
4. Check that the following has been printed:
“*** completed ***”
This indicates that the printer has been initialized and returned to the normal mode.
Rev. AApplication Development Information 3-13
3.8 FAQ List
Listed here are the most-asked questions (Q) and answers (A).
1. Look for information relating to your inquiry or problem in the questions.
2. Then, follow the instructions described in the “A” sentence below it.
3.8.1 Q: Why has my print data dropped out?
A: Check the handshake process. Data dropout can occur when the handshake between the
host computer and printer is not performed correctly. This can result in errors related to
print buffer size.
3.8.1.1 Corrective procedure
1. Check the serial communication cable, and check the cable connector specifications.
(See “Serial Interface Connection” on page 2-8.)
2. Check the serial communication conditions of the printer and the host.
Serial communication conditions
•Baud rate
•Parity
•Flow control
•Data length
You can check printer settings as follows:
1. Run a self-test to check the printer’s serial communication conditions. (See page 3-13.)
2. Setting communication conditions using the DIP switches. Set the baud rate with DIP
SW1-7 and SW1-8. (Refer to page 2-4.)
3-14 Application Development InformationRev. A
TM-T88II/T88III Technical Reference Guide
3.8.2 Q: Why does the drawer kick-out not operate properly?
A: Drawer specifications differ depending on the manufacturer and the part number. Make
sure the specifications of the drawer to be used meet the following conditions before
connecting it to the drawer kick-out connector. These conditions also apply to any other
devices that use the drawer kick-out connector. Any devices that do not satisfy all the
following conditions must not be used.
Conditions
•A load must be provided across drawer kick-out connector pins 4 and 2 or across pins 4
and 5. (*1)
•When the drawer open/close signal is used, a switch must be provided across drawer
kick-out connector pins 3 and 6. (*2)
•The solenoid used for the cash drawer must have a resistance of 24 Ω or higher. (*3)
NOTES
(*1) Operating the printer with incorrectly installed devices voids the warranty.
(*2) Connecting devices other than the drawer open/close switch voids the warranty.
(*3) Using a drawer or a drawer kick-out connector with an input current of 1 A or more may cause an
overcurrent, which will cause the device to malfunction.
3.8.3 Q: I cannot print part of Page 0 in Visual Basic. Why?
Cannot print a part of Page 0 (for example:) in Visual Basic.
A: Try printing using the following procedure:
When programming with Visual Basic, limitations prevent data from 81H through 9FH and
from E0H through FEH from being sent as characters. However, you can use the following
procedure to send this data:
Dim Send_ data(0) As Byte
Send_data(0) = &h81 ’1 byte of sending data
MSComm1.Output = Send_data
Rev. AApplication Development Information 3-15
3-16 Application Development InformationRev. A
TM-T88II/T88III Technical Reference Guide
Chapter 4
ESC/POS Command-related Information
This chapter introduces the printer operation settings, which can be made by using ESC/POS
commands, and precautions for those operation settings.
4.1 NV Memory (Non-volatile Memory)
The printer’s NV memory can be roughly divided into three parts:
•Firmware program area
•NV memory area for product information (This area cannot be edited by the user.)
•NV memory area that the user can access
The following areas are in the NV memory that the user can access:
•NV user memory
•NV graphics memory
•User-defined character code page (page 255 (blank page))
•Area of user-defined command default values
You can customize your printer by changing these values. Note the following when writing to
and deleting from NV memory.
❏ The following restrictions apply when performing non-volatile memory operations
(including data writing and deleting).
•Do not press the paper FEED button.
•Do not execute a real-time command.
•The ASB status is not sent, even when the ASB function in ESC/POS commands is set to
Enabled.
❏ The printer sometimes enters the BUSY state while data is written to NV memory. It is
important not to send data from the host computer while the printer is BUSY, because the
printer cannot process any received data.
❏ Frequent use of the functions for writing data to and deleting data from NV memory may
damage the memory. As a rule in using the various commands to write to NV memory,
avoid writing more than an average of ten times per day.
4.1.1 Using NV Memory
You can use the free area in NV memory for writing memos, for other character information, for
anything you like. Data written to this area is held in the memory even if you turn off the power.
For details on how to read and write data, see the “ESC/POS Application Programming Guide.”
Rev. AESC/POS Command-related Information 4-1
Note:
For details on NV graphics and NV bit images, see the “ESC/POS Application Programming
Guide.”
4.2 Printer Status
There are three ways to get the printer status, and each method has the following features. For
details, see the “ESC/POS Application Programming Guide.”
•Automatic status back (ASB):
When a status request is processed as a regular command, the printer automatically
returns a status message whenever the status changes. Always monitor the value
returned.
•Real-time status:
When the printer receives a real-time status command, it responds with the specified
printer status. Returning the printer status takes priority over any regular print data.
•Status:
The printer transmits a specified printer status in the same way it processes normal print
data.
4.3 Precautions When the Printer Is Offline
When printer handshake is set with DIP SW2-1 ON (BUSY = receive buffer full), use the ASB
function to check the printer status. Using the ASB lets the printer send status automatically at
the time of switching online/offline. When using a real-time command, make sure the receive
buffer is not full.
Example: After using the 4KB receive buffer to send data for each line, check the printer status.
4.4 Outputting Hex Dumps
TM printers can print data transmitted from the host computer as hexadecimal numbers and
their corresponding characters. Called “hex dump mode,” this allows you to make sure that data
has been sent correctly to the TM printer by comparing the printed result with the program.
Follow the steps below to output a hex dump:
1. With the roll paper cover open, turn power on while holding down the paper FEED button.
2. Close the roll paper cover.
3. Data received from then on is printed out from the TM printer in hexadecimal numbers and
their corresponding characters.
To quit the hex dump mode, turn the printer off after printing ends.
Note:
Do not use this mode when using OPOS or the APD. Doing so will cause unexpected data to be
printed, because the driver uses proprietary control to drive the printer.
4-2 ESC/POS Command-related InformationRev. A
TM-T88II/T88III Technical Reference Guide
Chapter 5
Product Specifications
5.1 Product Specifications (TM-T88II/TM-T88III)
Table 5-1 Specifications
Print methodThermal line printing
Print widthStandard:paper width of 80 mm —
print width of 72 mm {2.84"}, 512 dot positions
Factory option (with spacer): paper width of 58 mm {2.28"} —
Cut typePartial cut (left-most one point uncut)
Maximum paper thickness
for the manual cutter
Character setsTM-T88III:95 alphanumeric, 37 international characters, 128 × 11 pages of
Character dimensionsSee “Character configurations and dimensions,” below.
(Spaces between characters not included.)
Table 5-6 Character configurations and dimensions
StandardDouble-height Double-widthDouble-width /
W × H (mm)W × H (mm)W × H (mm)W × H (mm)
Font A (12 × 24)1.41 × 3.391.41 × 6.772.82 × 3.392.82 × 6.77
Font B (9 × 17)0.99 × 2.400.99 × 4.801.98 × 2.401.98 × 4.80
Kanji font (24 × 24)3.39 × 3.393.39 × 6.776.77 × 3.396.77 × 6.77
“Character configurations and dimensions,” below
Double-height
.
Notes: 1. Spaces between characters not included.
2. Characters can be scaled up to 64 times as large as the standard size.
5.4 Paper Specifications (TM-T88II/TM-T88III)
See Appendix B.
Rev. AProduct Specifications 5-3
5.5 Printable Area (TM-T88II/TM-T88III)
Printable area
Roll paper width
Figure 5-1 Printable area
Print direction
Table 5-7 Dimensions
a (roll paper width)b (left margin)c (print width)d (right margin)
79.5 ± 0.53.772.2 ± 0.23.7
57.5 ± 0.5 (factory option)3.750.8 ± 0.23.0
* Units: mm
5-4 Product SpecificationsRev. A
TM-T88II/T88III Technical Reference Guide
5.6 Print Position versus Cutter Position (TM-88II/TM88III)
The following illustration shows the relationship between print position and cutter position.
Final line of previous
receipt
Manual cutter position
Approx. 29 mm
Autocutter blade position
Cut position
Print direction
Maximum printable area
Approx. 15 mm
Figure 5-2 Print position versus cutter position
Note:
The values in the figure are center values. The margins vary, due to paper slack or paper variations from
piece to piece. Allow a certain margin of error when setting the paper cutter cut position.
Rev. AProduct Specifications 5-5
5.7 Overview of External Dimensions (TM-T88II/TM-T88III)
5.7.1 External Dimensions
The dimensions in the figure below are common to both the TM-88III and TM-88III.
❏ Height148 mm {5.83"}
❏ Width145 mm {5.71"}
❏ Depth195 mm {7.68"}
❏ WeightApprox. 1.8 kg {3.97 lb} (without roll paper)
[Units: mm]
Figure 5-3 Dimensions
5-6 Product SpecificationsRev. A
TM-T88II/T88III Technical Reference Guide
5.8 Operating Specifications (TM-T88II/TM-T88III)
Table 5-8 Temperature and humidity
ItemSpecifications
Temperature/
Humidity
Operating:5 to 45°C (41 to 113°F), 10 to 90% RH no condensation allowed.
(Refer to ambient operating ranges in the figure below.)
Storage: (shipped
packed state)
–10 to +50°C (14 to 122°F), 10 to 90% RH (excluding paper)
However, the stop bit for data transfer from the printer is fixed to 1 bit.
Rev. AInterfaces and Connectors A-1
A.1.2 Functions of each Connector Pin
Table A-2 Pin assignments
Pin
no.
1FGFrame ground
2TXDOutputTransmission data
3RXDInputReception data
4RTSOutputEquivalent to DTR signal (pin 20)
6DSRInputThis signal indicates whether the host computer can receive data.
7SGSignal ground
20DTROutput1) When DTR/DSR control is selected, this signal indicates whether the printer is Busy.
25INITInputChanging DIP SW2-8 enables this signal to be used as a reset signal for the printer.
Signal
name
Signal
direction Function
SPACE indicates that the host computer can receive data.
MARK indicates that the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data after confirming this
signal (except if transmitted using some ESC/POS commands). When XON/XOFF
control is selected, the printer does not check this signal. Changing DIP SW2-7 lets
this signal be used as a printer reset signal. When you use this signal as the printer’s
reset signal, the printer is reset when the signal remains MARK for a pulse width of
1ms or more.
SPACE status — indicates the printer is ready to receive data.
MARK status — indicates the printer is Busy. Set Busy conditions with DIP SW2-1.
(Refer to “Busy State” on page 3-11).
2) When XON/XOFF control is selected, the signal indicates that the printer is
properly connected and ready to receive data from the host.
SPACE status — indicates the printer is properly connected and ready to receive
data from the host. The signal is always SPACE, except in the following cases:
• During the period from when power is turned on to when the printer is
ready to receive data.
• During the self-test.
The printer is reset if the signal remains at SPACE for a pulse width of 1 ms or more.
A.1.3 XON/XOFF
When XON/XOFF control is selected, the printer transmits the XON or XOFF signals as follows.
The transmission timing of XON/XOFF differs, depending on the setting of DIP SW2-1.
Table A-3 XON/XOFF transmissions
Signal Printer statusDIP SW2-1 status
1 (ON)0 (OFF)
XON1) When the printer goes online after turning on the power (or reset using
the interface)
2) When the receive buffer is released from the buffer full stateTransmitTransmit
3) When the printer switches from offline to online—Transmit
4) When the printer recovers from an error using some ESC/POS commands —Transmit
XOFF5) When the receive buffer becomes fullTransmitTransmit
6) When the printer switches from online to offline—Transmit
A-2 Interfaces and ConnectorsRev. A
TransmitTransmit
TM-T88II/T88III Technical Reference Guide
A.1.4 Code
The hexadecimal numbers corresponding to the XON/XOFF codes are shown below.
❏ XON code:11H
❏ XOFF code:13H
Note:
When the printer goes from offline to online and the receive buffer is full, XON is not transmitted.
When the printer goes from online to offline and the receive buffer is full, XOFF is not transmitted.
When memory switch MSW 1-3 is off, XON is not transmitted as long as the printer is offline, even if a
receive buffer full state has been cleared.
A.2 IEEE 1284 Parallel Interface
A.2.1 Modes
The IEEE 1284 parallel interface supports the following two modes.
•Connector:ADS-B36BLFDR176 (HONDA) or equivalent product
(IEEE 1284 Type B)
•Reverse communication:Nibble or byte mode
*A rule above a signal name indicates an “L” active signal.
Rev. AInterfaces and Connectors A-3
Reverse mode
The transfer of status data from the printer to the host proceeds in the nibble or byte mode.
This mode allows data transfer from an asynchronous printer under the control of the host.
Data transfers in the nibble mode are made via the existing control lines in units of four bits (a
nibble). In the byte mode, data transfer proceeds by making the 8-bit data lines bidirectional.
Both modes fail to proceed concurrently in the compatibility mode, thereby causing half-duplex
transmission.
A-4 Interfaces and ConnectorsRev. A
TM-T88II/T88III Technical Reference Guide
A.2.2 Interface Signals
Table A-5 Connector pin assignments
PinSourceCompatibility ModeNibble ModeByte Mode
1HostStrobe
2Host/PtrData0(LSB)Data0 (LSB)Data0 (LSB)
3Host/PtrData1Data1Data1
4Host/PtrData2Data2Data2
5Host/PtrData3Data3Data3
6Host/PtrData4Data4Data4
7Host/PtrData5Data5Data5
8Host/PtrData6Data6Data6
9Host/PtrData7 (MSB)Data7 (MSB)Data7 (MSB)
10PrinterAck
11PrinterBusyPtrBusy/Data3, 7PtrBusy
12PrinterPerrorAckDataReq/Data2, 6AckDataReq
13PrinterSelectXflag/Data1, 5Xflag
14HostAutoFd
15NCNDND
16GNDGNDGND
17FGFGFG
18PrinterLogic-HLogic-HLogic-H
19GNDGNDGND
20GNDGNDGND
21GNDGNDGND
22GNDGNDGND
23GNDGNDGND
24GNDGNDGND
25GNDGNDGND
26GNDGNDGND
27GNDGNDGND
28GNDGNDGND
29GNDGNDGND
30GNDGNDGND
31HostInit
32PrinterFaultDataAvail/Data0, 4DataAvail
33GNDNDND
34PrinterDK_STATUSNDND
35Printer+5VNDND
36HostSelectIn
HostClkHostClk
PtrClkPtrClk
HostBusy kHostBusy
InitInit
1284-Active1284-Active
* NC: Not Connected
ND: Not Defined
Rev. AInterfaces and Connectors A-5
Note:
A signal name with a rule above it indicates an “L” active signal.
Bidirectional communications cannot take place, unless all signal names for both sides correspond to each
other.
Connect all signal lines using a twisted-pair cable. Connect the return side to the signal ground level.
Make sure the signals satisfy electrical characteristics.
Set the leading edge and trailing edge times to 0.5 µs or less.
Do not ignore Ack
corruption.
Make the interface cables as short as possible.
or BUSY signals during a data transfer. Ignoring such signals may result in data
A-6 Interfaces and ConnectorsRev. A
TM-T88II/T88III Technical Reference Guide
Appendix B
Options and Consumables
B.1 Roll Paper
The table below shows the roll paper specifications.
Table B-1 Paper specifications
Type of paperSpecified thermal paper
ShapeRoll
Select from the following:
Paper width
Roll core
External dimensionsOuter diameter83 mm {3.27"} or less
Note:
If roll core standards vary from the figures above, it is difficult for the roll paper NE detector to detect the
remaining amount of roll paper exactly. Use these figures merely as a guideline.
❐ 79.5 mm ± 0.5 mm (default)
❐ 57.5 mm ± 0.5 mm (factory option with spacer)
Internal diameter12 mm {0.47"}
Outer diameter18 mm {0.71"}
B.2 Power Supply
The following describes the specifications for the optional power supplies (PS-170 and PS-180).
B.2.1 PS-170 (Legacy Model no Longer Available from the Dealer)
B.2.1.1 Electrical characteristics
❏ Input conditions
Input voltage (rating):90 to 264 VAC (100 VAC –10% to 230 VAC +15%)
Frequency (rating):50/60 Hz ± 3 Hz
Power consumption (rating): 100 VA
❏ Output conditions
Output voltage (rating):24 VDC + 5%
Output current (rating):2.0 A
Output electric power (rating):48 VA
Output peak current:4.5 A (within 300 msec)
B.2.1.2 Case specifications
❏ Dimensions:80 mm (D) × 166 mm (L) × 44 mm (H) (excluding projections).
{3.15 × 6.54 × 1.73"} See the figure on the next page.
❏ Weight:Approx. 0.52 kg {1.15 lb} (excluding the AC cable)
❏ Material:Durability level: V0
❏ Color:Black (matte)
Rev. AOptions and Consumables B-1
80
166
44
Figure B-1 Case specifications
B.2.1.3 Material
No specific brominated flame retardants, such as PBBE and PBB, are used in this product.
B.2.1.4 AC cable selection
❏ Select an AC cable that satisfies the following conditions:
•Safety standard product
•Plug with PE terminal
❏ The AC cable is not packed with this printer.
B.2.2 PS-180 (Current Product for Printers)
B.2.2.1 Electrical characteristics
❏ Input conditions
Input voltage (rating):90 to 264 VAC
Frequency (rating):50/60 Hz ± 3 Hz
Power consumption (rating):100 VA
(100 VAC -10% to 230 VAC +15%)
B-2 Options and ConsumablesRev. A
TM-T88II/T88III Technical Reference Guide
❏ Output conditions
Output voltage (rating):24 VDC ± 5%
Output current (rating):2.0 A
Output electric power (rating):48 VA
Output peak current:4.5 A
B.2.2.2 Case specifications
❏ Dimensions:68 mm (D) × 136 mm (L) × 32 mm (H) (excluding projections)
{2.68" × 5.35" × 1.26"} Refer to the figure below.
❏ Weight:Approx. 0.4 kg {14.11 oz} (excluding the AC cable)
❏ Material:Durability level: V0
❏ Color:Black (matte)
136
68
32
Figure B-2 Case specifications
B.2.2.3 Material
No specific brominated flame retardants, such as PBBE and PBB, are used in this product.
B.2.2.4 AC cable selection
❏ Select an AC cable that satisfies the following conditions.
•Safety standard product
•Plug with PE terminal
❏ Ground connection:Be sure to ground for safety.
Rev. AOptions and Consumables B-3
B-4 Options and ConsumablesRev. A
Appendix C
Character Code Tables
C.1 Page 0 (PC437: USA, Standard Europe)
(International character set: when “America” is selected)
TM-T88II/T88III Technical Reference Guide
DC4
Note:
The character code tables show only character configurations. They do not show the actual print pattern.
Rev. BCharacter Code Tables C-1
C.2 Page 1 (Katakana)
C-2 Character Code TablesRev. B
C.3 Page 2 (PC850: Multilingual)
TM-T88II/T88III Technical Reference Guide
Rev. BCharacter Code Tables C-3
C.4 Page 3 (PC860: Portuguese)
C-4 Character Code TablesRev. B
C.5 Page 4 (PC863: Canadian-French)
TM-T88II/T88III Technical Reference Guide
Rev. BCharacter Code Tables C-5
C.6 Page 5 (PC865: Nordic)
C-6 Character Code TablesRev. B
C.7 Page 16 (WPC1252) (TM-T88III only)
TM-T88II/T88III Technical Reference Guide
Rev. BCharacter Code Tables C-7
C.8 Page 17 (PC866: Cyrillic #2) (TM-T88III only)
C-8 Character Code TablesRev. B
C.9 Page 18 (PC852: Latin2) (TM-T88III only)
TM-T88II/T88III Technical Reference Guide
Rev. BCharacter Code Tables C-9
C.10 Page 19 (PC858: Euro)
C-10 Character Code TablesRev. B
C.11 Page 255 (Blank Page)
TM-T88II/T88III Technical Reference Guide
UD: undefined
Rev. BCharacter Code Tables C-11
C.12 International Character Set
Country
America
France
Germany
UK
Denmark I
Sweden
Italy
Spain I
Japan
Norway
Denmark II
ASCII codes (base 16)
Spain II
Latin America
Korea
C-12 Character Code TablesRev. B
TM-T88II/T88III Technical Reference Guide
Appendix D
TM-T88II/TM-88III Comparison Table
TM-T88IIITM-T88II
1. High-speed print modeApprox. 150 mm/s {5.91"/s}
(4.72") maximum
2. High-speed power
consumption mode
3. Serial interface selectable
baud rates
4. Conditions for canceling
receive buffer BUSY state *
5. Supported character sets
(extended graphics) *
6. Driver (EPSON OPOS ADK,
Advanced Printer Driver )
Average approx. 1.8 AAverage approx. 1.7 A
4800, 9600, 19200, 38400, (2400
discontinued; 38400 added). 38400
selected by setting DIP SW1-7 and 1-8
to ON.
Set on DIP SW2-5 *Cannot be changed
11 pages
including WPC 1252,
PC866 [Cyrillic #2], PC852 [Latin2])
Also can be operated by the TM-T88II
driver. Functions, however, are
restricted as follows:
• Some baud rates cannot be used in
serial communications (38400 bps,
2400 bps).
Note: The driver cannot set a
38400 bps baud rate. Selecting
a 2400 bps baud rate with the
driver causes garbled
characters (the printer does not
support a 2400 bps baud rate).
Approx. 120 mm/s {4.72"/s}
(4.72") maximum
2400, 4800, 9600, 19200
8 pages
—
* For details on the conditions for canceling the receive buffer BUSY state, refer to ’ DIP Switch Functions, ’ (page 2-3).
Rev. ATM-T88II/TM-88III Comparison Table D-1
D-2 TM-T88II/TM-88III Comparison TableRev. A
EPSON
SEIKO EPSON CORPORATION
Printed in Japan
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