Mitsubishi MDT521S Control Manual

Controlling the LCD monitor via RS-232C/RS-485 Remote Control

This LCD monitor can be controlled by the computer connected by an RS-232C cable or a CAT5 cable via the supplied CAT5 Tx
BOX.
Functions that can be controlled by a personal computer are:
• Power ON or OFF
• Switching between input signals

Connection

Connection by RS-232C (For RS-232C cable, the reverse type cable should be used.)
PC
RS-232C cable
Connection by CAT5 RS-485 (For CAT5 cable, the straight type cable should be used)
Type A
USB cable
To RS-232C
PC
RS-232C cable
This connection isn't necessary when the USB COM port is used.
NOTE:
If your PC (IBM or IBM compatible) is equipped only with a 25-pin serial port connector, a 25-pin serial port adapter is required.
Contact your dealer for details.

1) Interface

PROTOCOL RS-232C/RS-485 (CAT5)
BAUD RATE 9600 [bps]
DATA LENGTH 8 [bits]
PARITY BIT NONE
STOP BIT 1 [bits]
FLOW CONTROL NONE
This LCD monitor uses RXD, TXD and GND lines for RS-232C control.

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.
Address code
HEX
30h 30h
ASCII
'0' '0'
[Address code] 30h 30h (In ASCII code, '0' '0') fi xed.
[Function code] A code of each fi xed control move.
[Data code] A code of each fi xed control data (number) and not always indicated.
[End code] 0Dh (In ASCII code, '
Monitor
To RS-232C IN To RS-232C OUT
CAT5 Tx BOX
Type B
(supplied)
To CAT5
IN OUT
CAT5 cable
Function code Data code
Function Data
Function Data
' ) fi xed.
English-35
Monitor
To RS-232C IN
RS-232C cable
Monitor
To CAT5 To CAT5 To CAT5
RGB5 IN OUT RGB5 IN
CAT5 cable
End code
0Dh
To RS-232C OUT
Monitor
To CAT5
OUT