Transmission/ Receiving Protocol - LG 84WT70PS Owner's Manual

Transmission/ Receiving protocol

Transmission
[Command1][Command2][ ][Set ID][ ][Data][Cr]
* [Command 1]: First command. (k, j, m, d, f, x)
* [Command 2]: Second command.(a to z)
* [Set ID]: Set up the Set ID number of product.
range : 01H to 63H. 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 '0 x 0 D')
* [ ]: ASCII code Space (0 x 20)
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.
* Note : In this mode, display will send the acknowledgement after power on processing completion.
There might be a time delay between command and acknowledgement.
* No acknowledgement signal will be sent from display, if Set ID in transmission signal is set to '00'(=0x00).
Error Acknowledgement
[Command2][ ][Set ID][ ][NG][Data][x]
* If there is error, it returns NG
CONTROLLING THE MULTIPLE PRODUCT
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