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Using the serial connector
The serial connector which is on the side terminal board of the projector conforms to the RS-232C interface
specification, so that the projector can be controlled by a personal computer which is connected to this connector.
<Side terminal board>
SERIAL
Computer
D-SUB 9-pin
NOTE:
Communication cable
Use a proper communication cable which is suitable for the personal computer to connect the serial connector
and the personal computer.
Pin layout and signal names for SERIAL connector
Projector
Pin No.
1
5
D-SUB 9-pin connector
(male) seen from the
outside
6 9
Signal name
RXD
TXD
GND
RTS
CTS
Contents
NC
Received data
Transmitted data
NC
GND
NC
Connected internally
NC
Communication settings
Signal level
Determined by the RS-232C interface
Synchronizing method
Asynchronous
Baud rate
9600 bps
Parity
None
Character length
8 bits
Stop bit
1 bit
X parameter
None
S parameter
None
Basic format
Each packet which is sent from the computer starts with STX. Following this is the command itself and the
parameters for that command (if any), and the packet then ends with ETX. Add parameters when necessary
according to the control contents.
STX
C1 C2 C3 :
P1 P2 P3 P4 P5
ETX
Parameter (1-5 bytes)
Colon (1 byte)
Start byte
Command (3 bytes)
NOTE:
If sending multiple commands, check that a response has been received from the projector for one command
before sending the next command.
If an incorrect command is sent from the personal computer, the “ER401” command will be sent from the
projector to the personal computer.
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