OPTIONAL ACCESSORIES
15-4
MFC 4550/6550MC/7550MC
OP-US-5.0
Maintenance
ON
1 2 3 4 5 6 7 8
Table
1:
Serial
Interface
Parameters
Settings
Selector
Parameters
On
(up)
Off
(down)
1
Baud
Rate
—
See
Table
2.
—
2
Baud
Rate
—
See
Table
2.
—
3
Data
Length
7
bits
8
bits
4
Stop
Bit
2
bits
1
bit
5
Parity
—
See
Table
3.
—
6
Parity
—
See
Table
3.
—
7
Protocol
Xon/Xoff
+
DTR
DTR only
8
Robust
Xon
O n
Off
Table
2:
Baud
Rate
Settings
Selector
1
Selector
2
For
RS-422A
For
RS-232C
Off
Off
57600
9600
O n
Off
9600
4800
Off
O n
1200
1200
O n
O n
19200
19200
Table
3:
Parity
Settings
Selector
1
Selector
2
Parity
O n
O n
Odd
O n
Off
Even
Off
—
N o n e
If
necessary,
set
the
serial
interface
parameters
as
follows:
1. Make
sure
the
printer
is
in
offline.
2. To
set
the
serial
interface
parameters
of
the
dual
in-
line
package
(DIP)
switch,
move
the
selectors
up
(ON)
or
down
(OFF).
• The
factory
settings
are
indicated
in
bold
print.
• If
the
robust
Xon
setting
is
turned
on
with
selector
8,
the
printer
sends
Xon
signals
at
one
second
intervals
to
the
connected
computer
until
it
receives
data.
It
is
effective
only
if
selector
7
is
set
to
the
On
position
for
the
Xon/Xoff
plus
DTR
setting.