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Signal
Signal name
1
-3v
channel
Ground
Frame
Ground
Indicator ~
Received Line
-3v
Signal
-3v
6 - 6
6.1
RS-232-C
interface
Direction
0
System--Printer
3v
3v
signal
lines -
If the Reverse Channel line prorocol
selected
by
setting
signal stays at 1.
is
as
follows:
This signal is set to 0 when DTR is 0 or :he
interface
buffer
is
(threshold
is set
is almost full (threshold is set
panel) or before DTR is set to 1.
The time from when :his
active
polarity
of
host and printer.
line is a frame ground line
and printer.
signal
If this
is set to be effective, the DTR
set to 0 when this signal is 0.
signal is set to
after the DTR
and DSR are set to 0 successively,
this signal is kept at 1.
used, this signal is kept
If
an
request does not
occur in the printer, the
printer
on.
When eransmiering
signal
at
0
during dara
If this signal is 1, the printer ignores data on
validaced by setting, whethe:c this signal is 0 01
This signal is set to 0 when the local loopback
test is performed.
the host responds
signal on (0).
signal at 0 during this test.
Continued
Functions
is not
at
the
operator
panel,
If selecwd,
the signal state
empty
or
almost
empty
at the
operator
panel).
at the
signal is set to 1 to
this
signal
can
be
between the host
0 for 0.5 to 0.7 set, and
If the DSR is not
at 1 after the DTR
error
or
operator
data co the printer, the host
transmission.
on the RD line can be
The printer performs this
setting this
'by
this
operator
set.
the
is
intervention
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