Mitsubishi Diamondview DV75UM, User Manual, Page: 41 / 59

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External Control
RS232 control is not necessary for operation but is a convenient way to control displays from a computer at
a distance. Most functions that can be done with the remote, can also be done with RS232 commands. Plus,
you can send inquiries to the displays and find out the current settings and values.
RS232 Command and Response Format
Commands sent from an automation/control system or PC to the display must have the following format:
STX (1byte) + IDT (1byte)+ Type (1byte)+ CMD ( [Value/Reply(1byte)] + ETX (1byte)
STX
：
Start byte = 07
IDT
：
Don’t care
Type
：
Read or Write command, 01 : read, 02 : write; 00 : return to host (from monitor)
CMD
：
as following tables
Value
：
Setting Value of “Write Command”
Reply
：
Return Value of monitor
ETX
：
End byte = 08
Transmit from PC (Host)
Read command
：
07 IDT 01 CMD 08 (7bytes)
Write/Setting command
：
07 IDT 02 CMD VAL 08 (8bytes)
Return from Monitor: Return CMD is the same with received CMD, the return command will be sent after action.
Serial Port Setting
Baud Rate Data Bit Parity Bit Stop Bit
115200 8 None 1
Baud rate can be set to 115200, 38400, 19200, or 9600 to match the monitor baud rate setting.
Baud rate 19200 is the default setting.
Explanation of symbols
▲: Valid command on Power saving/ off mode (The setting of "Power Saving Config" must be Wake on All).
Serial Command/ Response Examples
Description Command sent to LCD Panel Response Received from LCD Panel
Turn LCD panel power off. 07 01 02 50 4F 57 00 08 07 01 00 50 4F 57 00 08
Turn LCD panel power on. 07 01 02 50 4F 57 01 08 07 01 00 50 4F 57 01 08
Request LCD panel power status. 07 01 01 50 4F 57 08
07 01 00 50 4F 57 XX 08
(XX = 0 when off or 1 when on)
Set the LCD panel contrast to 30 07 01 02 43 4F 4E 1E 08 07 01 00 43 4F 4E 1E 08