51
ENGLISH
Using the serial terminals

Pin assignments and signal names

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.
The main unit is equipped with SERIAL terminals located in its terminal section on the side, and this terminal is
compliant with RS-232C. Also a serial output terminal is provided to enable plural projector control.

Examples of connection

Single projector Plural projectors

PC
D-Sub 9-pin
(male)
Communication cable
D-Sub 9-pin
(male)
D-Sub 9-pin
(female)
Communication cable
<Terminal section on Projector 1> <Terminal section on Projector 2>
D-Sub 9-pin
(female)
D-Sub 9-pin
(female)
D-Sub 9-pin
(male)
D-Sub 9-pin
(male)
Start
(1 byte) ID designate
3 command
characters (3 bytes)
Parameter
(undefined length)
End
(1 byte)
2 ID
characters
(2 bytes) Semicolon
(1 byte)
Colon
(1 byte)
ZZ, 1 to 64 and 0A to 0Z
STX C1 C2 C3 : P1 P2 …Pn ETXA D I 1 I 2 ;
(2 bytes)
• If a command is sent within about 60 seconds after the lamp is turned on, the response may be
returned late or the command may be unable to be executed. Try sending and receiving commands
after 60 seconds has elapsed.
• When sending several commands, be sure to wait for more than 0.5 seconds after receiving a
response from the projector, and then send the next command. When sending commands without
parameters, a colon (:) is not necessary.
Attention
• If a command cannot be executed, the projector will send an “ER401” response to the computer.
• If an invalid command is received, the projector will send an “ER402” response to the computer.
• Projector ID supported on the RS-232C interface is ZZ (ALL) and a group of 1 to 64 and 0A to 0Z.
•
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,
ID specification is ALL and VPS-SYSTEM is the master, or
ID specification is group and Group is the master.
• In the hexadecimal format, STX has the character code 02 and ETX the character code 03.
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
D-Sub 9-pin (male),
external appearance
Serial output terminal
Pin No.Signal name
RXD
TXD
GND
RTS
CTS
Description
NC
Receive data
Send data
NC
Ground
NC
Connected internally
NC
Signal level
Synchronization method
Baud rate
Parity
Character length
Stop bit
X parameter
S parameter
RS-232C compliant
Start-stop synchronization
9 600 bps
None
8 bits
1 bit
None
None