SERIAL
PC
8-pin DIN (male)
Serial adapter
ET-ADSER
Communication cable (RS-232C)
S
P
E
C
F
I
L
E
PT-
LB51NT
Micro-Portable Wireless LCD Projector
As of May 2007
< 7 >
STX
ETX
C1 C2 C3
:
P1 P2 P3 P4
Start
(1 byte)
End
(1 byte)
Colon
(1 byte)
Parameter
(1-4 bytes)
Command
(3 bytes)
(Control and/or query commands)
Serial connector
The serial connector complies with R
S
-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
Communication conditions (factory setting)
Basic format
Transmission from the computer begins with
S
TX, then the ID, command, parameter, and ETX are sent
in this order. Add parameters according to the details of control.
CAUTIION
When sending multiple commands, be sure to send the next command after receiving a response from the projector.
CAUTIION
Be sure to see that an optional serial adapter ET-AD
S
ER and a
R
S
-232C communication cable match the PC to be connected.
1
2
5
3
6
8
No.
1
2
3
4
No.
5
6
7
8
Signal name
–
–
RXD
GND
Signal name
TXD
–
–
–
De
s
cription
Connected internally
Connected internally
Receive data
Ground
De
s
cription
Send data
Connected internally
NC
NC
Signal level
Synchronization method
Baud rate
Parity
Character length
Stop bit
X parameter
S parameter
RS-232C-compliant
Start-
s
top
s
ynchronization
9,600 bp
s
None
8 bit
s
1 bit
None
None
Cable specifications
1
2
3
4
5
6
7
8
9
–
2
3
–
5
6
7
8
–
5
3
–
4
6
1
2
–
1
2
3
4
5
6
7
8
9
PC (DTE)
Projector
Serial adapter
(ET-ADSER)
NC
NC
DSR
NC
NC
NC
NC
NC
Mini DIN 8-pin
