Panasonic DLP PT-D3500U - Manual (Page 39)

Using the serial terminals
39
Communication conditions (Factory setting)
Basic format
Transmission from the computer begins with STX, then the ID, command, parameter, and ETX are sent in this
order. Add parameters according to the details of control.
Start
(1 byte) ID designate
3 command
characters (3 bytes) Parameter
(undefined length)
End
(1 byte)
Two ID
characters
(2 bytes)
Semicolon
(1 byte) Colon
(1 byte)
ZZ, 1 to 64
STX C1 C2 C3 : P1 P2 Pn ETX A D I 1 I 2 ;
(2 bytes)
Signal level
Synchronization method
Baud rate
Parity
Character length
Stop bit
X parameter
S parameter
RS232C compliant
Start-stop synchronization
9 600bps
None
8 bits
1 bit
None
None
Pin assignments and signal names
The main unit is equipped with SERIAL terminals located in its terminal section on the side, and this terminal is
compliant with RS232C.
Examples of connection
• No command can be sent or received for 10 to 60 seconds after the lamp starts lighting. Try sending
any command after that period has elapsed.
• When sending several commands, be sure to wait for a response from the projector before sending the
next command. When sending commands without parameters, a colon (:) is not necessary.
Attention
• If a wrong command is received, the projector will send an “ER401” command to the computer.
• Projector ID supported on the RS232C interface is ZZ (ALL) and a group of 1 to 64.
• If a command is sent with a projector ID specified, the projector will return answer back only in the
following cases:
If it coincides with the projector ID, or
ID specification is ALL .
Note
PC
D-Sub 9-pin (female)
<Terminal section on projector side>
D-Sub 9-pin (male)
Communication cable
D-Sub 9-pin (female),
external appearance
Serial input terminal
Pin No. Signal name
TXD
RXD
GND
CTS
RTS
Description
NC
Send data
Receive data
Connected internally
Ground
NC
Connected internally
NC