A_ENG RS 232C LG Published RS232C Guide

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RS-232C

Controlling the Multiple Product

Use this method to connect several products to a single PC.
You can control several products at a time by connecting them to a single PC.

Connecting the cable
Connect the RS-232C cable as shown in the picture.
* The RS-232C protocol is used for communication between the PC and product. You can
turn the product on/off, select an input source or adjust the OSD menu from your PC.

RS-232C
(CONTROL &
SERVICE)
RS-232C Cable
(not included)

PC
monitor 1

monitor 2

Communication Parameter
▲▲ ▲ ▲ ▲▲

Baud Rate : 9600bps (UART)
Data Length : 8bits
Parity Bit : None
Stop Bit : 1bit
Flow Control : None
Communication Code : ASCII code

A1

monitor 3

monitor 4

RS-232C

Controlling the Multiple Product

Command Reference List
01. Power
02. Input Select
03. Aspect Ratio
04. Screen Mute
05. Volume Mute
06. Volume Control
07. Contrast
08. Brightness
09. Color
10. Tint
11. Sharpness
12. OSD Select
13. Remote Lock/ key Lock
14. Balance
15. Color Temperature
16. Abnomal state
17. ISM mode
18. Auto configuration
19. Key
20. Tile Mode
21. Tile H Size
22. Tile V Size
23. Tile ID Set
24. Elapsed time return
25. Temperature value
26. Lamp fault check

COMMAND1
k
k
k
k
k
k
k
k
k
k
k
k
k
k
k
k
j
j
m
d
d
d
d
d
d
d

A2

COMMAND2
a
b
c
d
e
f
g
h
i
j
k
l
m
t
u
z
p
u
c
d
g
h
i
l
n
p

DATA(Hexa)
00H - 01H
02H - 09H
01H - 09H
00H - 01H
00H - 01H
00H - 64H
00H - 64H
00H - 64H
00H - 64H
00H - 64H
00H - 64H
00H - 01H
00H - 01H
00H - 64H
00H - 03H
FFH
00H - 08H
01H
Key Code
00H - 44H
00H - 64H
00H - 64H
00H - 10H
FFH
FFH
FFH

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol
Transmission
[Command1][Command2][ ][Set ID][ ][Data][Cr]
* [Command 1]: First command. (j, k, m, d)
* [Command 2]: Second command.
* [Set ID]: Set up the Set ID number of product.
range : 1~99. by setting '0', server can control all products.
* In case of operating with more than 2 sets using set ID as '0' at the same
time, it should not be checked the ack message.
Because all sets will send the ack message, so it's impossible the check the
whole ack messages.
* [DATA]: To transmit command data.
Transmit 'FF' data to read status of command.
* [Cr]: Carriage Return
ASCII code ‘0x0D’
* [ ]: ASCII code Space (0x20)’
OK Acknowledgement
[Command2][ ][Set ID][ ][OK][Data][x]
* The Product transmits ACK (acknowledgement) based on
this format when receiving normal data. At this time, if the
data is data read mode, it indicates present status data.
If the data is data write mode, it returns the data of the PC
computer.
Error Acknowledgement
[Command2][ ][Set ID][ ][NG][Data][x]
* If there is error, it returns NG

A3

Controlling the Multiple Product

RS-232C

Transmission / Receiving Protocol

▲

01. Power(Command : a)
To control Power On/Off of the Set.
Transmission
[k][a][ ][Set ID][ ][Data][Cr]
Data 0 : Power Off

1 : Power On

Acknowledgement
[a][ ][Set ID][ ][OK][Data][x]
▲

To show the status of Power On/Off.
Transmission
[k][a][ ][Set ID][ ][FF][Cr]

Acknowledgement
[a][ ][Set ID][ ][OK][Data][x]
Data 0 : Power Off

1 : Power On

▲

02. Input Select (Command : b) (Main Picture Input)
To select input source for the Set.
You can also select an input source using the INPUT
button on the remote control.
Transmission
[k][b][ ][Set ID][ ][Data][Cr]
Data 2 : AV
4 : Component 1
5 : Component 2

6 : RGB (DTV)
7 : RGB (PC)
8 : HDMI (DTV)
9 : HDMI (PC)

Acknowledgement
[b][ ][Set ID][ ][OK][Data][x]
Data 2 : AV
4 : Component 1
5 : Component 2

6 : RGB (DTV)
7 : RGB (PC)
8 : HDMI (DTV)
9 : HDMI (PC)

A4

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

03. Aspect Ratio(Command : c) (Main picture format)
To adjust the screen format.
You can also adjust the screen format using the ARC
(Aspect Ratio Control) button on remote control or in the
Screen menu.
Transmission
[k][c][ ][Set ID][ ][Data][Cr]
Data 1 : Normal Screen (4:3)
2 : Wide Screen (16 :9)
3 : Horizon (Spectacle)
4 : Zoom1

5 : Zoom2
6 : Original
7 : 14 : 9
8 : Full (Europe version only)
9 : 1 : 1 (PC)

Acknowledgement
[c][ ][Set ID][ ][OK][Data][x]

▲

04. Screen Mute(Command : d)
To select screen mute on/off.
Transmission
[k][d][ ][Set ID][ ][Data][Cr]
Data 0 : Screen mute off (Picture on)
1 : Screen mute on (Picture off)
Acknowledgement
[d][ ][Set ID][ ][OK][Data][x]

A5

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

05. Volume Mute(Command : e)
To control On/Off of the Volume Mute.
Transmission
[k][e][ ][Set ID][ ][Data][Cr]
Data 0 : Volume Mute On (Volume Off)
1 : Volume Mute Off (Volume On)
Acknowledgement
[e][ ][Set ID][ ][OK][Data][x]
Data 0 : Volume Mute On (Volume Off)
1 : Volume Mute Off (Volume On)

▲

06. Volume Control(Command : f)
To adjust Volume .
Transmission
[k][f][ ][Set ID][ ][Data][Cr]
Data
Min : 00H ~ Max : 64H
(Hexadecimal code)
Acknowledgement
[f][ ][Set ID][ ][OK][Data][x]
Data

Min : 00H ~ Max : 64H

• Refer to ‘Real data mapping’ page A7.

A6

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

07. Contrast(Command : g)
To adjust screen contrast.
You can also adjust the contrast in the Picture menu.
Transmission
[k][g][ ][Set ID][ ][Data][Cr]
Data
Min : 00H ~ Max : 64H
• Refer to ‘Real data mapping’ as shown below.
Acknowledgement
[g][ ][Set ID][ ][OK][Data][x]
* Real data mapping
0 : Step 0
:
A : Step 10
:
F : Step 15
10 : Step 16
:
64 : Step 100

▲

08. Brightness(Command : h)
To adjust screen brightness.
You can also adjust the brightness in the Picture menu.
Transmission
[k][h][ ][Set ID][ ][Data][Cr]
Data
Min : 00H ~ Max : 64H
• Refer to ‘Real data mapping’ as shown below.
Acknowledgement
[h][ ][Set ID][ ][OK][Data][x]
* Real data mapping
0 : Step
:
A : Step 10
:
F : Step 15
10 : Step 16
:
64 : Step 100
A7

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

09. Color(Command : i) (Video only)
To adjust the screen color.
You can also adjust the color in the Picture menu.

Transmission
[k][i][ ][Set ID][ ][Data][Cr]
Data
Min : 00H ~ Max : 64H
(Hexadecimal code)
• Refer to ‘Real data mapping’ page A7.

Acknowledgement
[i][ ][Set ID][ ][OK][Data][x]
Data

Min : 00H ~ Max : 64H

▲

10. Tint(Command : j) (Video only)
To adjust the screen tint.
You can also adjust the tint in the Picture menu.

Transmission
[k][j][ ][Set ID][ ][Data][Cr]
Data
Red: 00H ~ Green: 64H
(Hexadecimal code)
• Refer to ‘Real data mapping’ page A7.

Acknowledgement
[j][ ][Set ID][ ][OK][Data][x]
Data

Red: 00H ~ Green: 64H

* Tint Real data mapping
0 : Step -50
:
64 : Step 50

A8

Controlling the Multiple Product

RS-232C

Transmission / Receiving Protocol

▲

11. Sharpness(Command : k) (Video only)
To adjust the screen Sharpness.
You can also adjust the sharpness in the Picture menu.
Transmission
[k][k][ ][Set ID][ ][Data][Cr]

Data
Min : 00H ~ Max : 64H
(Hexadecimal code)
• Refer to ‘Real data mapping’ page A7.

Acknowledgement
[k][ ][Set ID][ ][OK][Data][x]
Data

Min : 00H ~ Max : 64H

▲

12. OSD Select(Command : l)
To control OSD on/off to the set.
Transmission
[k][l][ ][Set ID][ ][Data][Cr]
Data 0 : OSD Off

1 : OSD On

Acknowledgement
[l][ ][Set ID][ ][OK][Data][x]
Data 0 : OSD Off

1 : OSD On

▲

13. Remote Lock /Key Lock (Command : m)
To control Remote Lock on/off to the set.
This function, when controlling RS-232C, locks the remote control and the local keys.

Transmission
[k][m][ ][Set ID][ ][Data][Cr]
Data 0 : Off

1 : On

Acknowledgement
[m][ ][Set ID][ ][OK][Data][x]
Data 0 : Off

1 : On

A9

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

14 Balance(Command : t)
To adjust the sound balance.
Transmission
[k][t][ ][Set ID][ ][Data][Cr]

Data
Min : 00H ~ Max : 64H
(Hexadecimal code)
• Refer to ‘Real data mapping’ page A7.
Acknowledgement
[t][ ][Set ID][ ][OK][Data][x]
Data

Min : 00H ~ Max : 64H

* Balance : L50 ~ R50

▲

15. Color Temperature (Command : u)
To adjust the screen color temperature.
Transmission
[k][u][ ][Set ID][ ][Data][Cr]
Data 0 : Normal
1 : Cool
2 : Warm
3 : User

Acknowledgement
[u][ ][Set ID][ ][OK][Data][x]
Data 0 : Normal
1 : Cool
2 : Warm
3 : User

A10

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol
▲

16. Abnomal state (Command : z)
Abnormal State : Used to Read the power off status when Stand-by mode.
Transmission
[k][z][ ][Set ID][ ][Data][Cr]

Data FF : Read
0 : Normal (Power on and signal exist)
1: No signal (Power on)
2 : Turn the monitor off by remote control
3 : Turn the monitor off by sleep time function
4 : Turn the monitor off by RS-232C function
6 : AC down
8 : Turn the monitor off by off time function
9 : Turn the monitor off by auto off function

Acknowledgement
[z][ ][Set ID][ ][OK][Data][x]

▲

17. ISM mode(Command: j p)
Used to select the afterimage preventing function.
Transmission
[j][p][ ][Set ID][ ][Data][Cr]
Data 1 : Inversion
2 : Orbiter
4 : White Wash
8 : Normal
Acknowledgement
[p][ ][Set ID][ ][OK][Data][x]

A11

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol
▲

18. Auto Configure(Command: j u)
To adjust picture position and minimize image shaking
automatically. it works only in RGB(PC) mode.
Transmission
[j][u][ ][Set ID][ ][Data][Cr]

Data 1 : To set
Acknowledgement
[u][ ][Set ID][ ][OK][Data][x]

▲

19. Key(Command : m c)
To send IR remote key code.
Transmission
[m][c][ ][Set ID][ ][Data][Cr]
Data Key code : Refer to page A18.
Acknowledgement
[c][ ][Set ID][ ][OK][Data][x]

A12

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

20. Tile Mode(Command : d d)
Change a Tile Mode.
Transmission
[d][d][][Set ID][][Data][x]

Data

Description

00

Tile mode is off.

12

1 x 2 mode(column x row)

13

1 x 3 mode

14

1 x 4 mode

...

...

44

4 x 4 mode

* The data can not be set to 0X or X0 except 00.
Acknowledgement
[d][][00][][OK/NG][Data][x]

A13

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

21. Tile H Size(Command : d g)
To set the Horizontal size.
Transmission
[d][g][][Set ID][][Data][x]
Data

Min : 00H ~ Max : 64H

Acknowledgement
[g][][Set ID][][OK/NG][Data][x]

▲

22. Tile V Size(Command : d h)
To set the Vertical size.
Transmission
[d][h][][Set ID][][Data][x]
Data

Min : 00H ~ Max : 64H

Acknowledgement
[h][][Set ID][][OK/NG][Data][x]

A14

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

23. Tile ID Set(Command : d i)
To assign the Tile ID for Tiling function .
Transmission
[d][i][][Set ID][][Data][x]
Data
Min : 00H ~ Max : 10H
(Hexadecimal code)
Acknowledgement
[i][][Set ID][][OK/NG][Data][x]

▲

24. Elapsed time return(Command : d l)
To read the elapsed time.
Transmission
[d][l][][Set ID][][Data][x]
* The data is always FF(in Hex).
Acknowledgement
[l][][Set ID][][OK/NG][Data][x]
* The data means used hours.
(Hexadecimal code)

A15

RS-232C

Controlling the Multiple Product

Transmission / Receiving Protocol

▲

25. Temperature value (Command : d n)
To read the inside temperature value.
Transmission
[d][n][][Set ID][][Data][x]
* The data is always FF(in Hex).
Acknowledgement
[n][][Set ID][][OK/NG][Data][x]
* The data is 1 byte long in Hexadecimal.

▲

26. Lamp fault Check(Command : d p)
To check lamp fault.
Transmission
[d][p][][Set ID][][Data][x]

* The data is always FF(in Hex).
Acknowledgement
[p][][Set ID][][OK/NG][Data][x]
Data 0 : Lamp Fault
1: Lamp OK

A16

IR Codes

RS-232C

▲

How to connect
Connect your wired remote control to Remote Control port on the Product.

▲

Output waveform

Remote Control IR Code
single pulse, modulated with 37.917KHz signal at 455KHz
Tc
Carrier frequency
FCAR = 1/Tc = fosc/12
Duty ratio = T1/Tc = 1/3

T1
▲

Configuration of frame
• 1st frame

Lead
code

Low
custom code

High
custom code

Data code

Data code

C0 C1 C2 C3 C4 C5 C6 C7 C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7

• Repeat frame

Repeat code

Tf

▲

Lead code

9ms

4.5ms

0.55ms

▲

Repeat code
9ms
2.25ms

▲

Bit description
• Bit "0"

• Bit "1"
0.56ms

0.56ms

1.12ms

2.24ms

▲

Frame interval : Tf
• The waveform is transmitted as long as a key is depressed.
Tf

Tf

Tf=108ms@455KHz

A17

IR Codes

RS-232C
Note

▲

R/C Button

▼

R/C Button
▲

00
01
02
03
08
C4
C5
09
98
0B
0E
43
5B
6E
44
10
11
12
13
14
15
16
17
18
19
5A
BF
D4
D5
D7
C6
79
76
77
AF
99

Function

VOL( )

R/C Button

▲

Code(Hexa)

VOL( )

R/C Button

POWER ON/OFF

PR/C Button (Power On/Off)

POWER ON

Discrete IR Code(Only Power On)

POWER OFF

Discrete IR Code(Only Power On)

MUTE

R/C Button

AV
INPUT
SLEEP
MENU
EXIT
PSM
SET

R/C Button

Number Key 0

R/C Button

Number Key 1

R/C Button

Number Key 2

R/C Button

Number Key 3

R/C Button

Number Key 4

R/C Button

Number Key 5

R/C Button

Number Key 6

R/C Button

Number Key 7

R/C Button

Number Key 8

R/C Button

Number Key 9

R/C Button

AV
COMPONENT1
COMPONENT2
RGB PC
RGB DTV
HDMI/DVI
ARC
ARC (4:3)
ARC (16:9)
ARC (ZOOM)
AUTO CONFIC

Discrete IR Code(Input AV Selection)

R/C Button
R/C Button
R/C Button
R/C Button
R/C Button
R/C Button

Discrete IR Code(Input COMPONENT1 Selection)
Discrete IR Code(Input COMPONENT2 Selection)
Discrete IR Code(Input RGB PC Selection)
Discrete IR Code(Input RGB DTV Selection)
Discrete IR Code(Input HDMI/DVI Selection)
R/C Button
Discrete IR Code(Only 4:3 mode)
Discrete IR Code(Only 16:9 mode)
Discrete IR Code(Only ZOOM1, ZOOM2 mode)
Discrete IR Code

A18
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