InFocus LP1200 appendix Control this projector by using a personal computer, Interface

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	Commands to be used (ASCII code)
8:40 a.m.	Turn the power ON	00!
	Change input to RGB1	00_r1
0:20 p.m.	Turn the power OFF	00‘
1:00 p.m.	Turn the power ON	00!
3:00 p.m.	Change input to VIDEO1	00_v1
5:20 p.m.	Turn the power OFF	00‘

•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	RS-232C
BAUD RATE	9600 [bps]
DATA LENGTH	8 [bits]
PARITY BIT	NONE
STOP BIT	1 [bits]

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		Function code	Data code	End code
HEX	30h	30h	Function	Data	0Dh
ASCII	'0'	'0'	Function	Data

APPENDIX

[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, ' ') fixed.

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.