NEC LCD4000-BK MultiSync LCD4000 User's Manual - Page 30

Using the LCD with a Personal Computer(PC) This LCD monitor can be controlled by connecting a personal computer with a RS-232C terminal. Functions that can be controlled by a personal computer are: • Power ON or OFF • Switching between input signals Connection LCD Monitor + PC PC to RS-232C terminal RS-232C Cable 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 BAUD RATE DATA LENGTH PARITY BIT STOP BIT FLOW CONTROL RS-232C 9600 [bps] 8 [bits] NONE 1 [bits] NONE This LCD monitor uses RXD, TXD and GND lines for RS-232C control. For RS-232C cable, the reverse type cable should be used. 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. HEX ASCII Address code 30h 30h '0' '0' Function code Function Function Data code Data Data End code 0Dh [Address code] [Function code] [Data code] [End code] 30h 30h (In ASCII code, '0' '0') fixed. A code of each fixed control move. A code of each fixed control data (number) and not always indicated. 0Dh (In ASCII code, ' ' ) fixed. 28