Panasonic PTL797PWUL - LCD PROJECTOR Manual - Page 8

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S P E C

F I L E

XGA/SVGA Portable LCD Projectors

The serial connector on the projector conforms to the RS-232C interface specification, which allows the projector to be

controlled with a personal computer via the connector.

SERIAL connector pin assignment

No. Signal name

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

Command (3 bytes)

Start byte

Colon (1 byte)

Control commands

The commands which the personal computer can use to control the projector are shown in the following table.

Command Control content

PON

Power ON

POF

Power OFF

AVL

Volume

AMT

Mute (picture mute)

IIS

Input signal selection

Q$S

Lamp ON condition query

QLS

Lamp ON check query

Cable specifications

as of 27 July 1999

Using the Serial Connector

NOTE: Use a proper communication cable which is suitable for the personal computer to connect the serial

connector and the personal computer.

Contents

TXD

Transmitted data

RXD

Received data

Connected internally

GND

CTS

Connected internally

RTS

Connected internally

P1 P2 P3 P4 P5

Parameter (1-5 bytes)

Parameter

000-063

0, 1

VID, SVD, RG1, RG2

0, 1, 2, 3

At the projector

PT-L797/L597

Communication settings

Signal level:

Synchronising method: Asynchronous

Baud rate:

Parity:

Character length:

Stop bit:

X parameter:

S parameter:

NOTE:

• If sending multiple commands, check that a response has been

received from the projector for one command before sending the

next command.

• When a command which does not require parameters is sent, the

colon ":" is not required.

• If an incorrect command is sent from the personal computer, the

"ER401" command will be sent from the projector to the personal

ETX

computer.

• If you are using the REMOTE connector to control the projector

externally, commands sent to the SERIAL connector will no longer

be accepted.

Remarks

In standby mode, all commands other than the PON

command are ignored.

• The PON command is ignored during lamp ON control.

• If a PON command is received while the cooling fan is operating

after the lamps have switched off, the lamps are not turned back

on again until approximately 40 seconds have passed since they

turned off, in order to protect the lamps.

000 = min., 063 = max.

0 = MUTE OFF, 1 = MUTE ON

• If the picture mute function is on, this command can be used to

toggle the video mute on and off.

VID = VIDEO, SVD = S-VIDEO, RG1 = RGB1, RG2 = RGB2

0 = Standby, 1 = Lamp ON control active, 2 = Lamp ON,

3 = Lamp OFF control active

0 = Both lamps 1 and 2 are OFF, 1 = Only lamp 1 is ON,

2 = Only lamp 2 is ON, 3 = Both lamps 1 and 2 are ON

Determined by the RS-232C interface

9600 bps

None

8 bits

1 bit

None

At the computer

(DTE specifications)