BenQ LH820ST User manual

LH820ST
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................................................................................................................................................ 23

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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
P1
Color
P2
1
Black
1
2
Brown
3
3
Red
2
4
Orange
4
5
Yellow
5
6
Green
6
7
Blue
7
8
Purple
8
9
Gray
9
Case
Drain wire
Case
RS232 pin assignment
Pin
Description
Pin
Description
1
NC
2
RXD
3
TXD
4
NC
5
GND
6
NC
7
RTS
8
CTS
9
NC

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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

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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.

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3. Finish Serial port setup.
Baud rate
9600 / 14400 / 19200 / 38400 / 57600 / 115200*bps
*Default Baud rate
Data length
8 bit
Parity check
None
Stop bit
1 bit
Flow control
None

7
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

8
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

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3. Finish Serial port setup.
Baud rate
9600 / 14400 / 19200 / 38400 / 57600 / 115200*bps
*Default Baud rate
Data length
8 bit
Parity check
None
Stop bit
1 bit
Flow control
None

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Command table
•Available features differ by projector specification, input sources, settings, etc..
•Commands are working if the standby power is 0.5W or a supported baud rate of the projector is
set.
•Uppercase, lowercase, and a mixture of both types of characters are accepted for a command.
•If a command format is illegal, it will echo Illegal format.
•If a command with correct format is not valid for the projector model, it will echo Unsupported
item.
•If a command with correct format cannot be executed under certain condition, it will echo Block
item.
•If RS232 control is performed via LAN, a command works whether it starts and ends with <CR>. All
the commands and behaviors are identical with the control through a serial port.
Function
Type
Operation
ASCII
Support
Power
Write
Power On
<CR>*pow=on#<CR>
Yes
Write
Power Off
<CR>*pow=off#<CR>
Yes
Read
Power Status
<CR>*pow=?#<CR>
Yes
Source
Selection
Write
COMPUTER/YPbPr
<CR>*sour=RGB#<CR>
Yes
Write
COMPUTER 2/YPbPr2
<CR>*sour=RGB2#<CR>
Yes
Write
COMPUTER 3/YPbPr3
<CR>*sour=RGB3#<CR>
No
Write
Component
<CR>*sour=ypbr#<CR>
No
Write
Component2
<CR>*sour=ypbr2#<CR>
No
Write
DVI-A
<CR>*sour=dviA#<CR>
No
Write
DVI-D
<CR>*sour=dvid#<CR>
No
Write
HDMI(MHL)
<CR>*sour=hdmi#<CR>
Yes
Write
HDMI 2(MHL2)
<CR>*sour=hdmi2#<CR>
Yes
Write
HDMI 3
<CR>*sour=hdmi3#<CR>
No
Write
Composite
<CR>*sour=vid#<CR>
Yes
Write
S-Video
<CR>*sour=svid#<CR>
Yes
Write
Network
<CR>*sour=network#<CR>
No
Write
USB Display
<CR>*sour=usbdisplay#<CR>
No
Write
USB Reader
<CR>*sour=usbreader#<CR>
No
Write
HDbaseT
<CR>*sour=hdbaset#<CR>
No
Write
DisplayPort
<CR>*sour=dp#<CR>
No
Write
3G-SDI
<CR>*sour=sdi#<CR>
No
Write
Smart System
<CR>*sour=smartsystem#<CR>
No
Read
Current source
<CR>*sour=?#<CR>
No
Audio Control
Write
Mute On
<CR>*mute=on#<CR>
Yes
Write
Mute Off
<CR>*mute=off#<CR>
Yes
Read
Mute Status
<CR>*mute=?#<CR>
Yes