NEC LCD3000 User Manual page 40

3) Control sequence
(1) The command from a computer to the LCD monitor will be sent within 400ms.
(2) The LCD monitor will send a return command 400ms* after it has received and executed a code. If the command isn't
received correctly, the LCD monitor will not send the return command.
(3) The computer checks the command and confirms if the command which has been sent has been executed or not.
(4) The LCD monitor sends various codes other than the return code. When using the control sequence via RS-232C,
rejection of other codes from computer side is required.
*: The sending time of return command may delay depending on the condition (during changing the input signal, etc.).
Example: Turn power ON (Corresponding ASCII code in ' ' )
Sending commands
from computer
30 30 21 0D
'0' '0' '!' ' '
4) Operation commands
The operation commands execute the basic operation setting of the LCD monitor.
It may not operate when changing the signal:
Operation
POWER ON
POWER OFF
INPUT RGB 1
INPUT RGB 2
INPUT RGB 3
INPUT VIDEO
INPUT DVD/HD
• POWER OFF command will not work for 1 minute after the power is turned on.
• POWER ON command will not work for 1 minute after the power is turned off.
01_English
Status code from
LCD monitor
30 30 21 0D
'0' '0' '!' ' ' (Command echoed back)
ASCII HEX
! 21h
" 22h
_r1 5Fh 72h 31h
_r2 5Fh 72h 32h
_r3 5Fh 72h 32h
_v1 5Fh 76h 31h
_v2 5Fh 76h 32h
28
Meaning
Command for
POWER ON
Command received
English-28
15/10/02, 12:08 pm