NEC SC40 User Manual Page 43

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English
English-37
Using the LCD with RS-232C - continued
3) Control sequence
1) e command from a computer to the LCD monitor will take 400ms.
2) e LCD monitor will send a return command 400ms* aer it has received
an encode. If the command is not received correctly,
the LCD monitor will not send the return command.
3) e personal computer checks the command and conrms if the
command which has been sent has been executed or not.
4) is 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.
*e sending time of the return command may be delayed depending on the
monitor’s current activity (changing the input signal, etc.).
[Example] Turn the power ON. (
' ' is for ASCII code)
Sending commands
from the PC etc.
Status code from
LCD monitor
Meaning
30 30 21 0D
'0' '0' '!' ' '
Command for
POWER ON
30 30 21 0D
'0' '0' '!' ' '
Command received
(Command echo back)
4) Operation commands
Operation commands execute the basic operation setting of this LCD monitor.
It may not operate when changing the signal:
Operation ASCII
HEX
POWER ON
!
21h
POWER OFF
"
22h
DVI
_r1
5Fh 72h 31h
VGA
_r2
5Fh 72h 32h
RGB/HV
_r3
5Fh 72h 33h
HDMI
_h1
5Fh 68h 31h
VIDEO
_v1
5Fh 76h 31h
DVD/HD
_v2
5Fh 76h 32h
S-VIDEO
_v3
5Fh 76h 33h
TV
_t2
5Fh 74h 32h
POWER OFF command should not be used less than 1 minute aer the power is
turned on.
POWER ON command should not be used less than 1 minute aer the power is
turned o.
S-VIDEO is enabled by having an S-VIDEO cable connected with the "S-VIDEO"
signal present and selecting "PRIORITY MODE".
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