NEC MultiSync LCD6520L User Manual page 40

3) Control sequence
(1) The command from a computer to the LCD monitor will be sent in 400ms.
(2) The LCD monitor will send a return command 400ms* after it has received and encoded. If the command isn't
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 return code. When having a control sequence by RS-232C, reject other
codes from personal computers side.
*: The sending time of return command may delay depending on the condition (during changing of the input signal, etc.).
Example: Turn the power ON ( ' ' is for ASCII code)
Sending commands
from the PC
30 30 21 0D
'0' '0' '!' ' '
4) Operation commands
The operation commands execute the basic operation setting of this LCD monitor.
It may not operate when changing the signal:
Operation ASCII
POWER ON !
POWER OFF "
INPUT DVI _r1
INPUT VGA _r2
INPUT RGB/HV _r3
• POWER OFF command should be operated over 1 minute after the power is turned on.
• POWER ON command should be operated over 1 minute after the power is turned off.
1
* S-VIDEO is enabled by having the "S-VIDEO" cable connected with the "S-VIDEO" signal present and selecting "PRIORITY MODE".
* 2 S-VIDEO is SEPARATE only.
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 Host computer ask 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)
Input
RGB/HV(BNC)
HDMI
Video
DVD/HD
S-VIDEO
TV*
HIGHBRIGHT
Picture mode
STANDARD
Around
AV board
Around
Temperature
option
of Internal
slot
monitor
Around
Inverter PCB
NOTE: For complete information please see file "External_Control.pdf" on the CD-ROM.
* The product you purchased may not have this feature.
Status code from
LCD monitor
30 30 21 0D
'0' '0' '!' ' '
HEX
21h
22h
5Fh 72h 31h
5Fh 72h 32h
5Fh 72h 33h
Command from Monitor
30 30 76 50 31 0D '0''0''v''P''1'[enter]
Function
vP
vP
vI
vI
vI
vI
vI
vI
vI
vI
vM
vM
resolution 0.5˚C tcx1
resolution 1˚C tc1
resolution 0.5˚C tcx2
resolution 1˚C tc2
resolution 0.5˚C tcx3
resolution 1˚C tc3
Meaning
Command for
POWER ON
Command received
(Command echoed back)
Operation ASCII
INPUT HDMI _h1
INPUT VIDEO* 1 _v1
INPUT DVD/HD _v2
INPUT S-VIDEO* 2 _v3
INPUT TV* _t1
Detail of command
Ask about the power status of monitor.
Monitor is powered-on.
ASCII
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
t1 76 49
p1 76 4D
p2 76 4D
(ex.) +25.0 74 63 78 31
(ex.) +25 74 63 31
(ex.) +30.5 74 63 78 32
(ex.) +31 74 63 32
(ex.) +30.5 74 63 78 33
(ex.) +31 74 63 33
English-38
HEX
5Fh 68h 31h
5Fh 76h 31h
5Fh 76h 32h
5Fh 76h 33h
5Fh 74h 31h
HEX
Data (Receive)
31
30
72 31
72 32
72 33
68 31
76 31
76 32
76 33
74 31
70 31
70 32
2B 20 32 35 2E 30
2B 20 32 35
2B 20 33 30 2E 35
2B 20 33 31
2B 20 33 30 2E 35
2B 20 33 31