BenQ LU935 User manual

LU935

Projector RS232 Command Control

Installation Guide

2 
Table of Contents 
Introduction .............................................................................................................................................................................. 3 
Wire arrangement...................................................................................................................................................... 3 
RS232 pin assignment.............................................................................................................................................. 3 
Connections and communication settings....................................................................................................... 4 
RS232 serial port with a crossover cable....................................................................................................4 
Settings..................................................................................................................................................................... 4 
RS232 via LAN...................................................................................................................................................................7 
Settings......................................................................................................................................................................7 
RS232 via HDBaseT ..................................................................................................................................................... 8 
Settings..................................................................................................................................................................... 8 
Command table...................................................................................................................................................................10 
FAQ Video.................................................................................................................................................................................24 
 

Introduction

The document describes how to control your BenQ projector via RS232 from a computer.

Follow the procedures to complete the connection and settings first, and refer to the

command table for RS232 commands.

Available functions and commands vary by model. Check the specifications and user manual of

the purchased projector for product functions.

Wire arrangement

Wire Arrangement

Color

Black

Brown

Red

Orange

Yellow

Green

Blue

Purple

Gray

Case

Drain wire

Case

RS232 pin assignment

Description

RXD

TXD

GND

RTS

CTS

Connections and communication settings

Choose one of the connections and set up properly before RS232 control.

RS232 serial port with a crossover cable

Settings

On-screen images in this document are for reference only. The screens may vary depending on

your Operating System, I/O ports used for connection, and the specifications of the connected

projector.

PC or laptop

Communication cable (crossover)

D-Sub 9 pin (female)

D-Sub 9 pin (male) on a projector

1. Determine the COM Port name used for the RS232 communications in Device

Manager.

2. Choose Serial and the corresponding COM port as the communication port. In this

given example, COM6 is selected.

3. Finish Serial port setup.

Baud rate

9600

Data length

8 bit

Parity check

None

Stop bit

1 bit

Flow control

None

RS232 via LAN

Settings

1. Find the Wired LAN IP address of the connected projector from the OSD menu and

make sure the projector and the computer are within the same network.

2. Input 8000 in the TCP port # field.

PC or laptop

RJ45 port on a projector

LAN cable

RS232 via HDBaseT

Settings

1. Determine the COM Port name used for the RS232 communications in Device

Manager.

2. Choose Serial and the corresponding COM port as the communication port. In this

given example, COM6 is selected.

PC or laptop

HDBaseT compatible device

D-Sub 9 pin

RJ45

RJ45 port on a projector

LAN cable

D-Sub 9 pin

3. Finish Serial port setup.

Baud rate

9600

Data length

8 bit

Parity check

None

Stop bit

1 bit

Flow control

None

RS-232 Command Code

1. Each input character will be echoed and All the echo text will be same with the

command you execute except query command

2. When give “Enter”(ASCII 13), it will echo 3E,00. It means projector is ready to accept

RS-232 command.

3. If no any command, it should echo 0D,0A,00 after 5 seconds.(5 sec time out)

4. If the command format is illegal, it will echo “Illegal format”.

5. If the command format is correct, but it is not valid for this model, it will echo

“Unsupported item”.

6. If the command format is correct, but can’t be execute in some condition, it will echo

“Block item”.

Note:1.Item 5 and item 6 is not support at power saving mode (standby power <0.5W).

7. Each input upper case and lower case character should be action.

8. all of status command and power on command should be action when low power

mode(<0.5W)

9. Support volume bar display

10. If system have Lan over RS232 function, The RS232 command can be support, and all

of the LAN over RS232 function behavior follow RS232

11. The response string will be in upper case

12. About inquiry command, please follow current status to Echo.

(Each input upper case and lower case character should be action)

Function

Type

Operation

ASCII

Suppor

Power

Write

Power On

YES

Write

Power Off

YES

Read

Power Status

YES

Source Selection

Write

COMPUTER/YPbPr

YES

Write

COMPUTER 2/YPbPr2

Write

COMPUTER 3/YPbPr3

Write

Component

Write

Component2

Write

DVI-A

Write

DVI-D

Write

HDMI(MHL)

YES

Write

HDMI 2(MHL2)

YES

Write

HDMI 3

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