[U-12] Remote Control; Rs-232C/Rs-485 Remote Control - Mitsubishi LDT55IV User Manual

U-12 Remote control
When the monitor is connected directly to a computer using an RS-232C cable (commercially available), the following operations can
be controlled via a communication. When the monitor is connected with a computer using an optional CAT5 Kit (option), the CAT5 Tx
BOX is connected to the CAT5 Rx BOX through RS-485, which makes longer-distance remote control possible. When the CAT5 Tx
BOX is connected using a USB cable, it functions as an RS-232C (COM) port by a Windows driver.
• Power ON or OFF
• Switching between input signals
• Volume control and mute
• Auto setup
• Check of the internal temperature of the monitor, etc.
CAUTION:
Never connect network devices to the CAT5 IN and OUT connectors. If you do so, they may adversely affect with each other,
causing breakdown.
NOTE:
For connection with a 25-pin serial port connector on the computer, a conversion adapter (commercially available) is required.
1) Interface
PROTOCOL
BAUD RATE
DATA LENGTH
PARITY BIT
STOP BIT
FLOW CONTROL
• For direct connection using RS-232C, use the RXD, TXD, and GND lines.
• For connection of the CAT5 Tx BOX using RS-485, either of the two communication modes can be selected by the COM.
MODE switch.
LEGACY: The RXD, TXD, RTS, DTR, and GND lines are used. For a control program, RTS and DTR as transmit control
signals of negative logic are used. The transmission period of TXD and the hold time of 70 ms are defi ned as "Sending
(Low)," and the subsequent processes as "Receiving (High)."
AUTO: The RXD, TXD, and GND lines are used. A response from the monitor will be returned in 70 ms or later.
2) Control command diagram
The command is structured by the address code, function code, data code and end code. The length of the command is
different for each function.
NOTE:
• This example shows a basic command that is used when a single computer and a single monitor are connected.
When you want to connect multiple monitors or perform complicated control using other commands than the basic
commands, contact your dealer for advanced command specifi cations.
• To send commands with a keypad using terminal software, select "2s" or "30s" for CONTROL TIME OUT in
CONFIGURATION2 in the OSD menu. (Follow the same procedure for LAN control.)
Address code
HEX
ASCII
[Address code]
[Function code]
[Data code]
[End code]

RS-232C/RS-485 Remote control

RS-232C/RS-485 (CAT5)
9600 [bps]
8 [bit]
NONE
1 [bit]
NONE
Function code
30h 30h Function
'0' '0' Function
30h 30h (ASCII code, '0' '0'), fi xed.
Code unique to each control function.
Data unique to each control function (Not always indicated by numerical values.)
0Dh (In ASCII code, '
Data code
Data
Data
') fi xed.
English-37
Carry out as necessary
End code
0Dh