Transmission / Receiving Protocol; Error Acknowledgement - LG 49UT640S Series Owner's Manual

Transmission / Receiving Protocol

(Depending on Model)
Transmission
(Command1)(Command2)( )([Set ID])( )([Data])(Cr)
(Command1): First command to control the TV. (j, k, m or x)
(Command2): Second command to control the TV.
([Set ID]): You can adjust the set ID to choose desired monitor ID number
in option menu. Adjustment range is 1 to 99. When selecting Set ID '0' ,
every connected set is controlled. Set ID is indicated as decimal (1 to 99)
on menu and as Hexa decimal (0 x 0 to 0 x 63) on transmission/receiving
protocol.
([Data]): To transmit command data. Transmit 'FF' data to read status of
command.
(Cr): Carriage Return
ASCII code '0 x 0D'
( ): ASCII code 'space (0 x 20)'
OK Acknowledgement
(Command2)( )([Set ID])( )(OK)([Data])(x)
* The set 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)
* The set transmits ACK (acknowledgement) based on this format when
receiving abnormal data from non-viable functions or communication
errors.
[Data] 00: Illegal Code
22
1 Power (Command: k a)
► To control Power On/Off of the set.
Transmission
(k)(a)( )([Set ID])( )([Data])(Cr)
[Data] 00: [Off]
[Data] 01: [On]
Ack
(a)( )([Set ID])( )(OK/NG)([Data])(x)
► To Show TV is Power On/Off.
Transmission
(k)(a)( )([Set ID])( )(FF)(Cr)
Ack
(a)( )([Set ID])( )(OK/NG)([Data])(x)
* Similarly, if other functions transmit '0 x FF' data based on this format,
Acknowledgement data feed back presents status about each function.
* OK Ack., Error Ack. and other message may display on the screen when
TV is power On.
2 [Aspect Ratio] (Command: k c) (Main Picture Size)
► To adjust the screen format. (Main picture format) You can also adjust
the screen format using the picture settings.
Transmission
(k)(c)( )([Set ID])( )([Data])(Cr)
[Data] 01: [4:3] (Normal screen - [Just Scan] Off)
[Data] 02: [16:9] (Wide screen - [Just Scan] Off)
[Data] 06: [Original] ([Just Scan] Off)
[Data] 09: [Just Scan]
* Please make sure that the model doesn't support both Vertical Zoom
and All-Direction Zoom mode.
Ack
(c)( )([Set ID])( )(OK/NG)([Data])(x)
* Using the PC input, you select either 16:9 or 4:3 screen aspect ratio.