NEC M40-AV M40/M46 User Manual - Page 44

Using the LCD with RS-232C - continued 3) Control sequence 1) The command from a computer to the LCD monitor will take 400ms. 2) The LCD monitor will send a return command 400ms* after it has received an encode. If the command is not 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 the return code. When sending a control sequence via RS-232C, other codes from personal computers will be ignored. *The sending time of the return command may be delayed depending on the monitor's current activity (changing of the input signal, etc.). [Example] Turn the power ON. (' ' is for ASCII code) Sending commands from the PC etc. 30 30 21 0D '0' '0' '!' ' ' Status code from LCD monitor Meaning Command for POWER ON 30 30 21 0D '0' '0' '!' ' ' Command received (Command echo back) 4) Operation commands Operation commands execute the basic operation setting of this LCD monitor. It may not operate when changing the signal: Operation POWER ON POWER OFF DVI VGA RGB/HV HDMI VIDEO DVD/HD S-VIDEO TV ASCII ! " _r1 _r2 _r3 _h1 _v1 _v2 _v3 _t2 HEX 21h 22h 5Fh 72h 31h 5Fh 72h 32h 5Fh 72h 33h 5Fh 68h 31h 5Fh 76h 31h 5Fh 76h 32h 5Fh 76h 33h 5Fh 74h 32h • POWER OFF command should not be used less than 1 minute after the power is turned on. • POWER ON command should not be used less than 1 minute after the power is turned off. • S-VIDEO is enabled by having an S-VIDEO cable connected with the "S-VIDEO" signal present and selecting "PRIORITY MODE". English-38