Mitsubishi Electronics MDT521S user manual Control sequence, Operation commands, Read command

3)Control sequence

(1)The command from a computer to the LCD monitor will be sent in 600 ms.

(2)The LCD monitor will send a return command 600 ms* 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	Status code from	Meaning
from the PC	LCD monitor
30 30 21 0D		Command for
’0’ ’0’ ’!’ ’ ’		POWER ON
	30 30 21 0D	Command received
	’0’ ’0’ ’!’ ’ ’	(Command echoed back)

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	HEX
POWER ON	!	21h
POWER OFF	"	22h
INPUT RGB 1	_r1	5Fh 72h 31h
INPUT RGB 2	_r2	5Fh 72h 32h
INPUT RGB 3	_r3	5Fh 72h 33h
INPUT RGB 4	_r4	5Fh 72h 34h
INPUT RGB 5	_r5	5Fh 72h 35h
INPUT VIDEO	_v1	5Fh 76h 31h
INPUT DVD/HD	_v2	5Fh 76h 32h
INPUT S-VIDEO*	_v3	5Fh 76h 33h

5) Read command

•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.

* S-VIDEO is SEPARATE only

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. Example: When Host computer ask Power status of monitor, the status of monitor is powered-on.

	Command from computer			Command from Monitor				Detail of command
	30 30 76 50 0D	'0''0''v''P'[enter]						Ask about the power status of monitor
				30 30 76 50	31 0D	'0''0''v''P''1'[enter]		Monitor is powered-on.
Structure of the Read-command
							ASCII			HEX
					Function		Data (Receive)		Function		Data (Receive)
	POWER	ON			vP		1		76 50		31
		OFF (stand by)			vP		0		76 50		30
		RGB-1 (HDMI)			vI		r1		76 49		72 31
		RGB-2 (DVI-D)			vI		r2		76 49		72 32
		RGB-3 (D-SUB)			vI		r3		76 49		72 33
	Input	RGB-4 (BNC)			vI		r4		76 49		72 34
		RGB-5 (CAT5)			vI		r5		76 49		72 35
		Video			vI		v1		76 49		76 31
		DVD/HD			vI		v2		76 49		76 32
		S-VIDEO			vI		v3		76 49		76 33
	Picture mode	HIGHBRIGHT			vM		p1		76 4D		70 31
		STANDARD			vM		p2		76 4D		70 32
	Temperature	Around	resolution		tc1		(ex.) +25		74 63 31		2B 20 32 35
		Main board	1 ˚C
	of internal
		Around	resolution
	monitor				tc2		(ex.) +31		74 63 32		2B 20 33 31
		Power PCB	1 ˚C

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