Epson DFX-9000 - Manual (Page 95)

Control Panel 95
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Software
When you select ESC/P, the printer operates in the EPSON ESC/P
mode. When you select IBM PPDS, the printer emulates an IBM
printer.
0 slash
The zero character has a slash ( ) when this feature is on; it has
no slash (0) when this feature is off. The slash allows you to easily
distinguish between the uppercase letter “O” and a zero.
I/F (Interface) mode
The printer provides a slot for an optional interface in addition to
its built-in parallel interface, serial interface, and USB interface.
You can choose Auto (automatic), Parallel, Serial, USB, or
Optional
for the interface mode. When you select Auto, the
printer automatically selects the interface that is receiving data,
and uses that interface until the end of the print job. The Auto
setting allows you to share the printer among multiple computers
without changing the interface mode.
If only one computer is connected to the printer, you can select
Parallel
, Serial, USB, or Optional, depending on which
interface your computer uses.
Auto I/F (Interface) wait time
When the printer is in the auto interface mode and it receives no
data from the currently selected interface for the amount of time
specified with this setting, it determines which interface is
receiving data and switches to that interface. You can specify
either 10 seconds or 30 seconds for the auto interface wait time.
Parallel I/F bi-directional mode
The Parallel Interface bidirectional transfer mode is used when
this feature is on. If bidirectional transfer mode is unnecessary,
turn this off.