NEC LCD4020-BK-IT User Manual page 45

5) Read command
Host computer sends the command without Data-code to monitor.
After receiving this command, the monitor returns the command with Data-
code of current status to host computer.
<ex> When the Host computer checks the Power status of monitor, the status of
monitor is powered-on.
Command from
computer
30 30 76 50 0D
'0''0''v''P'[enter]
Structure of the Read-command
ON
POWER
OFF (stand by)
DVI (DVI-D)
VGA (D-sub)
RGB/HV (BNC)
HDMI
Input
VIDEO
DVD/HD
S-VIDEO
TV
HIGHBRIGHT
Picture Mode
Standard
NOTE:
For complete information please see file
"External_Control.pdf" on the CD-ROM.
Using the LCD with RS-232C
Command from Detail of command
Monitor
Ask about the power
30 30 76 50 31 0D Monitor is powered-on.
'0''0''v''P''1'[enter]
ASCII
Function
vP
vP
vI
vI
vI
vI
vI
vI
vI
vI
vM
vM
English-39
status of monitor.
Data (Receive) Function
1 76 50
0 76 50
r1 76 49
r2 76 49
r3 76 49
h1 76 49
v1 76 49
v2 76 49
v3 76 49
t2 76 49
p1 76 4D
p2 76 4D
RS-232C control will not function if the display is in "ECO
STANDBY" mode. If monitors are daisy-chained, and one display
is in "ECO STANDBY mode, then control of the entire daisy-chain
will be lost. See page 30 for more information on STANDBY mode.
- continued
HEX
Data (Receive)
31
30
72 31
72 32
72 33
68 31
76 31
76 32
76 33
74 32
70 31
70 32