74
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 RS-232C. Also a serial output terminal is provided to enable plural projector control.
Examples of connection
Single projector
Plural projectors
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 and 0A to 0Z
STX
C1
C2
C3
:
P1
P2
Pn
ETX
A D
I 1
I 2
;
(2 bytes)
Attention
Note
PC
D-Sub 9-pin (female)
<Terminal section on projector side>
D-Sub 9-pin (male)
Communication cable
SERIAL
IN
OUT
RS-232C (G)
RS-422 (R)
RS-232C (G)
RS-422 (R)
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 600bps
None
8 bits
1 bit
None
None
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)
SERIAL
IN
OUT
RS-232C (G)
RS-422 (R)
RS-232C (G)
RS-422 (R)
SERIAL
IN
OUT
RS-232C (G)
RS-422 (R)
RS-232C (G)
RS-422 (R)
• When the wrong command is sent, the "ER401" or "ER402" status is sent from the projector to the
personal 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.
• 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.
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.
Using the serial terminals
