Panasonic PT-TW230 Spec File page 9

S F
P E C I L
Short-Throw LCD Projector
Serial connector
The serial connector complies with RS-232C. To control the projector from a personal computer, com-
mands must be input through communication software, based on the format and satisfying the commu-
nication conditions shown below.
Pin assignments and signal names
6 9
1 5
D-sub 9-pin (male)
Serial input
Communication conditions (factory setting)
Signal level
Synchronization method
Baud rate
Parity
Basic format
Transmission from the computer begins with STX, then command, parameter, and ETX are sent in this
order. Add parameters according to the details of control.
STX C1 C2 C3
Start
(1 byte) Command
(3 bytes)
NOTE: When sending commands without parameters, a colon (:) is not necessary.
Basic format with sub-commands
Same as the basic format without sub-commands
STX C1 C2 C3
S1 S2 S3 S4 S5 E
Sub-command
(5 bytes)
Operation (1 byte):
"=" (Sets the value designated by the parameters)
NOTE: When sending sub-commands that require no parameters, operation (E) and parameters are not necessary.
CAUTION
• It may not be possible to send or receive commands for about 10 to 60 seconds when the lamp is first turned on. If this occurs, wait for 60 sec-
onds, then try sending or receiving again.
• When sending multiple commands, be sure to wait for at least 0.5 second after receiving a response from the projector before sending the next
command.
• Additional time is sometimes required for response due to processing inside the projector. Set the time-out period for command response to 10
seconds or more.
As of June 2012
SFL12M003-2
E
No. Signal name Description
1 – NC
2 RXD Receive data
3 TXD Send data
4 – NC
5 GND Ground
RS-232C-compliant
Start-stop synchronization
19,200 bps
None
: P1 P2 ... Pn
Colon
(1 byte) Parameters
(undefined length)
:
P1 P2 P3 P4 P5 P6
Parameters (6 bytes):
"+" or "-" sign (1 byte) with setting/adjusting value (5 bytes)
No. Signal name
6 –
7 –
8 –
9 –
Character length
Stop bit
X parameter
S parameter
ETX
End
(1 byte)
ETX
PT TW230
Description
NC
NC
NC
NC
8 bits
1 bit
None
None
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