NEC M40-AV User Manual page 44

Using the LCD with RS-232C
- continued
3) Control sequence
1) The command from a computer to the LCD monitor will take 400ms.
2) The LCD monitor will send a return command 400ms* after it has received
an encode. If the command is not received correctly,
the LCD monitor will not send the return command.
3) The personal computer checks the command and confirms if the
command which has been sent has been executed or not.
4) This LCD monitor sends various codes other than the return code. When
sending a control sequence via RS-232C, other codes from personal
computers will be ignored.
*The sending time of the return command may be delayed depending on the
monitor's current activity (changing of the input signal, etc.).
[Example] Turn the power ON. (
Sending commands
from the PC etc.
30 30 21 0D
'0' '0' '!' ' '
4) Operation commands
Operation commands execute the basic operation setting of this LCD monitor.
It may not operate when changing the signal:
Operation
POWER ON
POWER OFF
DVI
VGA
RGB/HV
HDMI
VIDEO
DVD/HD
S-VIDEO
TV
• POWER OFF command should not be used less than 1 minute after the power is
turned on.
• POWER ON command should not be used less than 1 minute after the power is
turned off.
• S-VIDEO is enabled by having an S-VIDEO cable connected with the "S-VIDEO"
signal present and selecting "PRIORITY MODE".
English-38
is for ASCII code)
' '
Status code from
LCD monitor
30 30 21 0D Command received
'0' '0' '!' ' ' (Command echo back)
ASCII HEX
! 21h
" 22h
_r1 5Fh 72h 31h
_r2 5Fh 72h 32h
_r3 5Fh 72h 33h
_h1 5Fh 68h 31h
_v1 5Fh 76h 31h
_v2 5Fh 76h 32h
_v3 5Fh 76h 33h
_t2 5Fh 74h 32h
Meaning
Command for
POWER ON