MITSUBISHI ELECTRIC SL1U - Manual (Page 30)

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3) Control sequence
(1) Send the command from a personal computer to the projector. (The commands must be sent at least
400ms apart.)
(2) The projector will send a return command 400ms* after it has received an end code. If the command is
not received correctly, the projector 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 projector sends various codes other than the return code. When having a control sequence by RS-
232C, reject other codes from personal computer side.
• * : The sending time of return command may delay depending on the condition (during changing the
input signal, etc.).
[Example] Turn the power ON (' 'is for ASCII code)
Sending commands Status code from Meaning
from the PC etc. projector
30 30 21 0D Command for POWER ON
'0' '0' '!' ' '
30 30 21 0D Command received
'0' '0' '!' ' ' (Command echo back)
Sending commands Status code from Meaning
from the PC etc. projector
30 30 5F 72 31 0D Command for setting the input
'0' '0' '_' 'r' '1' ' ' signal to COMPUTER
30 30 5F 72 31 0D Command received
'0' '0' '_' 'r' '1' ' ' (Command echo back)
Operation ASCII HEX
POWER ON ! 21h
POWER OFF " 22h
INPUT COMPUTER _r1 5Fh 72h 31h
INPUT VIDEO _v1 5Fh 76h 31h
INPUT S-VIDEO _v2 5Fh 76h 32h
4) Operation commands
The operation commands execute the basic operation setting of this projector. It may not operate when chang-
ing the signal.
• POWER OFF command will not work for 1 minute after the power is turned on.
• POWER ON command will not work for 1 minute after the power is turned off.
[Example] Set the input signal to COMPUTER (' 'is for ASCII code)
5) Volume commands
The volume commands execute the volume setting of this projector with the value.
[Example] Set the volume to 30 (Standard value) (' 'is for ASCII code)
Sending commands Status code from Meaning
from the PC etc. projector
30 30 56 4C 33 30 0D Command for setting the volume
'0' '0' 'V' 'L' '3' '0' ' '
30 30 56 4C 33 30 0D Command received
'0' '0' 'V' 'L' '3' '0' ' ' (Command echo back)
ITEM ASCII HEX VALUE
VOLUME VL 56h 4Ch 00 - 60
How to set the grade
Use ASCII letters code to set the grade for setting data. Please refer to the table below for HEX code.
ASCII '0' '1' '2' '3' '4' '5' '6' '7' '8' '9'
HEX 30h 31h 32h 33h 34h 35h 36h 37h 38h 39h