Panasonic PT-L795U Using the serial connector, Pin layout and signal names for SERIAL connector

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>	Computer
SERIAL

D-SUB 9-pin

Communication cable

NOTE:

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.	Signal name	Contents
				NC
1	5
			RXD	Received data
		D-SUB 9-pin connector	TXD	Transmitted data
		(male) seen from the		NC
		outside	GND	GND
6	9			NC
			RTS
				Connected internally
			CTS
				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 C 1 C 2 C 3 : P1 P2 P3 P4 P5 ETX

Start byte

NOTE:

Parameter (1-5 bytes)

Colon (1 byte)

Command (3 bytes)

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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