InFocus LP1200 User Manual page 48

Control this projector by using a personal computer
This projector can be controlled by connecting a personal computer with RS-232C terminal.
Functions can be controlled by a personal computer:
• Turn the ON or OFF
• Changing input signals
• PCGC ( button input by remote control)
• Reading warning data
By making a programme, you can also control this projector by a personal computer automatically.
[EXAMPLE]
Time Movement
8:40 a.m. Turn the power ON
Change input to RGB1
0:20 p.m. Turn the power OFF
1:00 p.m. Turn the power ON
3:00 p.m. Change input to VIDEO1
5:20 p.m. Turn the power OFF
• This projector can be controlle by connected equipment (ex. personal computer) if it is connected to RS-232C 1
IN terminal. If the equipments connected to RS-232C 2 IN terminal, this cannot be controlled.
1) Interface
PROTOCOL
BAUD RATE
DATA LENGTH
PARITY BIT
STOP BIT
This projector uses RXD, TXD and GND lines for RS-232C control.
For RS-232C cable,the reverse 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 by each function.
Address code
HEX 30h 30h
ASCII '0' '0'
[Address code] 30h 30h (In ASCII code, '0' '0') fixed.
[Function code] A code of each fixed control move
[Data code] A code of each fixed control data (number) and not always indicated.
[End code] 0Dh (In ASCII code, '
3) Control sequence
(1) The command from a personal computer to the projector will be sent in 400ms.
(2) The projector will send a return command 400ms after it has received an encode. if the command isn't
received correctly, the projector will not send the retirn command.
(3) The personal computer checks the command and confirms that 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 by the personal computer side.
Commands to be used (ASCII code)
00!
00_r1
00'
00!
00_v1
00'
RS-232C
9600 [bps]
8 [bits]
NONE
1 [bits]
Function code
Function
Function
') fixed.
Data code End code
Data 0Dh
Data