Panasonic PT-L720U User Manual
45
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Operation
44
Using the SERIAL connector
The serial connector which is on the side connector panel of the projector
conforms to the RS-232C interface specification, so that the projector can be
controlled by a personal computer which is connected to this connector.
conforms to the RS-232C interface specification, so that the projector can be
controlled by a personal computer which is connected to this connector.
Connection
NOTE:
B Use a proper communication
B Use a proper communication
cable which is suitable for the
personal computer to connect the
serial connector and the personal
computer.
personal computer to connect the
serial connector and the personal
computer.
Pin layout and signal
names for SERIAL
connector
names for SERIAL
connector
D-Sub9p (male)
Communication cable
SERIAL(female)
Computer
Basic format
The data sent from the computer to
the projector is transmitted in the
format shown below.
the projector is transmitted in the
format shown below.
NOTE:
B The projector can not receive the
B The projector can not receive the
command for 10 seconds after
the lamp is switched on. Wait 10
seconds before sending the
command.
the lamp is switched on. Wait 10
seconds before sending the
command.
B If sending multiple commands,
check that a response has been
received from the projector for
one command before sending the
next command.
received from the projector for
one command before sending the
next command.
B When a command which does
not require parameters is sent,
the colon (:) is not required.
the colon (:) is not required.
B If an incorrect command is sent
from the personal computer, the
“ER401” command will be sent
from the projector to the personal
computer.
“ER401” command will be sent
from the projector to the personal
computer.
Pin
No.
Communications settings
Signal
name
Contents
1
5
6
9
#
NC
$
TXD
Transmitted data
%
RXD
Received data
&
NC
'
GND
(
DSR
)
CTS
Connected internally
*
RTS
NC
+
D-SUB 9-pin connector seen from
outside
outside
Signal level
RS-232C
Asynchronous
Sync. method
Baud rate
Parity
9 600 bps
None
Character length 8 bits
Stop bit
1 bit
X parameter
None
S parameter
None
STX Command : Parameter ETX
Control commands
The commands which the personal computer can use to control the projector
are shown in the following table.
are shown in the following table.
Start byte
(02h)
(02h)
3 bytes
1 byte
1 byte–5 bytes
End byte
(03h)
Command
Control
Contents
Remarks
In standby mode, all commands other than
the PON command are ignored.
B The PON command is ignored during
the PON command are ignored.
B The PON command is ignored during
lamp ON control.
B If a PON command is received while the
cooling fan is operating after the lamp
has switched off, the lamp is not turned
back on again straight away, in order to
protect the lamp.
has switched off, the lamp is not turned
back on again straight away, in order to
protect the lamp.
Power ON
PON
Power OFF
POF
Volume
AVL
Parameter
000–063(Adjustment value 0–63)
000–063(Adjustment value 0–63)
Input signal
selection
selection
IIS
Parameter
VID=VIDEO
VID=VIDEO
SVD=S-VIDEO
RG1=RGB1(YP
B
P
R
1) RG2=RGB2(YP
B
P
R
2)
Lamp ON
condition query
condition query
Q$S
Parameter
0 = Standby
1 = Lamp ON control active
2 = Lamp ON
3 = Lamp OFF control active
0 = Standby
1 = Lamp ON control active
2 = Lamp ON
3 = Lamp OFF control active
Cable specifications
(When connected to a personal computer)
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
NC
NC
NC
NC
NC
NC
NC
NC
At the projector
At the computer
(DTE specifications)