FUJITSU M304X User Manual
Page 81
Table 6.1 RS-232-C interface signal lines
Continued
Signal
Signal name
Direction
Functions
1 0
S y s t e m - - P r i n t e r
channel
-3v
If the Reverse Channel line
is not
selected by setting at the operator panel, this
signal
1.
If
the signal state
is as follows:
This signal is set to 0 when DTR is 0 or
interface buffer is empty or almost empty
(threshold is
at
operator panel).
signal is
to 1 when
is almost full (threshold is
at
operator
panel) or before DTR is set
1.
The time from when
signal is set
1 to
it is set
0 is more than 200 ms.
active polarity of this signal can be set.
Ground
line is signal ground line
the
host and printer.
Frame Ground
line is
frame ground
between the host
and printer.
3 v
If this
signal
is set
be effective, the
Indicator
set
0 when this signal is 0.
signal is set
0 for 0.5
0.7
and
after the
and DSR are set to 0 successively,
this signal is kept at 1.
If the DSR is not
used, this signal is
at 1 after the
is
0.
If an error or operator intervention
request does
occur in the printer, the
printer
on.
Received Line
-3v 3v
When
data
printer, the host
Signal
this signal on
host keeps this
signal at 0 during
transmission.
If this signal is 1, the printer ignores data on
line.
on the
line can be
validaced by setting,
signal is 0
-3v
This signal is
0 when the local
test is performed.
The printer performs this
the host responds
‘by
setting this
signal on
always keeps this
signal at 0 during this test.
6 - 6