User Manual

Software
When you select ESC/P2 the printer operates in the EPSON ESC/P2 mode. When you select
IBMPPDS, the printer emulates an IBM printer.
0 slash
The zero character has a slash ( ) when this feature is turned on. It has no slash (0) when this
feature is turned off. The slash allows you to easily distinguish between the uppercase letter O and a
zero.
I/F (interface) mode
The printer comes with three kinds of interfaces; a parallel interface, a USB interface, or a network
interface (LQ-780N only).
If your printer is connected to only one computer, choose Parallel or USB for the interface mode,
depending on the interface you use. If your printer is connected to two computers, select Auto
(automatic) to allow the printer to automatically switch between interfaces depending on which
one is receiving data.
Auto I/F (interface) wait time
This setting takes effect only when “I/F (interface) mode” on page 23 is set to Auto. This setting
determines how long the printer waits when it no longer receives data from an interface before it
checks whether a print job is being sent through the other interface. You can specify 10 seconds
or 30 seconds for the auto interface wait time.
Parallel I/F bidirectional mode
The parallel interface bidirectional transfer mode is used when this feature is turned On. If
bidirectional transfer mode is unnecessary, turn this Off.
Packet mode
Make sure to select Auto to print from Windows applications using the printer driver included in
the software CD-ROM that comes with the printer. Turn off this mode if you encounter connection
problems when you are printing from applications based on other operating systems such as DOS.
LQ-780/LQ-780N User’s Guide
Printer Basics 23