External
Control
It
is
possible
to
control
this
unit
by
connecting
it
to
a
PC
using
an
RS
232C
cross
cable
(D
sub
9
pin).
The
projector
can
be
controlled
by
connecting
it
to
a
PC
through
the
computer
network
with
a
LAN
cable
for
control
commands
to
be
sent
to
the
projector.
Please
use
it
after
you
have
gained
proper
understanding
from
professional
books
or
consulting
the
system
administrator.
RS
232C
Specifications
Pin
No.
Signal
Function
Signal
Direction
2
RxD
Receive
data
PC
This
unit
3
TxD
Transmission
data
This
unit
PC
5
GND
Signal
ground
—
1,
4,
6
9
N/C
—
—
PC
refers
to
the
controller,
such
as
a
personal
computer.
Mode
Non
synchronous
Character
length
8
bit
Parity
None
Start
bit
1
Stop
bit
1
Data
rate
19200
bps
Data
format
Binary
1
5
6
9
This Unit
D6 D7
D4 D5
D2 D3
D0 D1
Stop bit
Start bit
TCP/IP
Connection
Before
controlling
via
LAN,
it
is
necessary
to
establish
connection
of
the
TCP
layer
by
a
“3
way
handshake”,
followed
by
sending
out
“PJREQ”
and
receiving
“PJACK”
within
five
seconds
after
the
projector
sends
out
“PJ_OK”
for
connection
authentication.
If
you
are
unable
to
complete
sending
within
five
seconds,
or
when
“PJ_NG”
or
“PJNAK”
is
received,
check
the
operating
status
of
the
projector,
followed
by
performing
the
steps
again
starting
from
establishment
of
a
TCP
connection,
Projector Control
Connection Authentication Procedure
PJACK
PJREQ
PJ_OK
Within 5 Seconds
Controlling PC
3-way Handshake
TCP Port No. 20554
Establishment of TCP Connection
Projector
70
Others
