Hitachi CP-A100W, EDA100 RS-232C Communication, Connecting the cable, Communications setting

RS-232C Communication

RS-232C Communication

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CONTROL port of the projector

	1	2	3	4
5	6	7	8	9

RS-232C cable (cross)			RS-232C port
- (1)	(1)	CD	of the computer
RD (2)	(2)	RD
TD (3)	(3) TD
- (4)	(4)	DTR
GND (5)	(5) GND
- (6)	(6)	DSR
RTS (7)	(7)	RTS
CTS (8)	(8)	DTS
- (9)	(9)	RI

Connecting the cable

1. Turn off the projector and the computer.

Connect the CONTROL port of the projector with a RS-232C port of

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Turn the computer on, and after the computer has started up turn the

3. projector on.

Communications setting

19200bps, 8N1

1. Protocol

Consist of header (7 bytes) + command data (6 bytes)

2. Header

BE + EF + 03 + 06 + 00 + CRC_low + CRC_high &5&BORZ/RZHUE\WHRI&5&ÀDJIRUFRPPDQGGDWD &5&BKLJK8SSHUE\WHRI&5&ÀDJIRUFRPPDQGGDWD

3.Command data

Command data chart

byte_0	byte_1	byte_2		byte_3		byte_4	byte_5
Action			Type			Setting code
low	high	low		high		low	high
Action (byte_0 - 1)
Action	&ODVVL¿FDWLRQ				Content
1	Set		Change setting to desired value.
2	Get		Read projector internal setup value.
4	Increment		Increment setup value by 1.
5	Decrement		Decrement setup value by 1.
6	Execute		Run a command.

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