Transmission/Receiving Protocol - HP LD4201 User Manual

44. Reset
45. Power Saving
46. Power Indicator
47. Serial No.
48. S/W Verison
49. Input Select

Transmission/Receiving Protocol

Transmission
[Command1][Command2][][Set ID][][Data][Cr]
[Command 1]
[Command 2]
[Set ID]
[Data]
[Cr]
[]
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 in data read mode, it indicates present status data. If the data is in data write
mode, it returns the data of the media player/computer.
Error Acknowledgement
96 Appendix C Command reference
2nd Draft
COMMAND1
f
f
f
f
f
x
First command (k, j, m, d, f, x)
Second command (a to u)
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.
To transmit command data.
Transmit 'FF' data to read status of command.
Carriage Return
ASCII code '0 x 0 D'
ASCII code Space (0 x 20)
COMMAND2 DATA1
k 00H–02H
l 00H–03H
o 00H–01H
y FFH
z FFH
b 60H–C0H
DATA2 DATA3
ENWW