TransAct Technologies ITHERM 280 - Manual (Page 183)

iTherm ® 280 Programmer’s Guide Programming Codes
28-07764 Rev C Page 181
ESC/POS TM Codes
The EPOS codes that are supported by the iTherm ® 280 Printer are listed in this section.
TransAct Technologies, Inc. has no control over how Epson extends or changes these
control codes, and can make no guarantees as to the operation of our printer when it
replaces an Epson printer. The TM-T90 and EPOS emulation’s are intended to make it
as easy as possible to replace an Epson printer with an iTherm
® 280 Printer.
The iTherm
® 280 Printer provides two Epson emulations. The first emulation is as close
as possible to the TM-T90 Printer and tries to make the iTherm ® 280 Printer a drop in
replacement. However, when the iTherm
®
280 Printer is in Epson TM-T90 emulation
mode, it is subject to the same limitations as a TM-T90 Printer.
The second Epson emulation is EPOS mode. It extends and enhances the TM-T90
emulation to remove some of the restrictions and give access to some of the iTherm
®
280 Printer features not addressed by the TM-T90. It is intended that the standard
Ithaca
® PcOS emulation be used for new applications.
The following section lists all TM-T90 and EPOS commands that are processed. They
are as close as possible to Epson’s definitions. The user must remember that the
iTherm
® 280 EPOS emulation, unlike the TM-T90 emulation, is not designed as a drop in
replacement for an Epson printer. The iTherm ® 280 Printer is designed to bring new and
unique features and functionality’s to a point-of-sale receipt printer. These features are
not always compatible with Epson printers.
Note: The Epson emulation does not support Unicode, Double Byte or
downloaded True Type fonts.
Differences between Epson TM T90 and iTherm ® 280
In a few minor ways, the operation and programming iTherm
®
280 is not identical to a
TM-T90. The following is a summary of key differences.
Page Mode
The page mode in the iTherm
®
280 operates in the same way as the TM-T88 and the
TM-T90, however, the page size can be larger if the ESC/POS emulation is selected.
Undocumented Epson Commands
There are a number of undocumented commands in Epson printers. Where TransAct is
aware of these commands, they have been duplicated in the iTherm
® 280 Printer.
Real-time Status
The iTherm
® 280 Printer is available in serial and parallel versions. Epson supports
parallel operation through a parallel to serial interface. Consequently, the response times
for the iTherm
®
280 Printer are generally faster. The iTherm
®
280 Printer implements the
IEEE 1284 nibble-mode standard. If an application requires real-time status from the
printer, the IEEE 1284 bi-directional protocol must be used. The iTherm
® 280 Printer
does not support byte mode. If the iTherm ® 280 Printer is used in an IEEE 1284