Hitachi ED-X12 RS-232CCommunication, Connecting the cable, Communications setting, Protocol

RS-232C Communication

RS-232C Communication

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CONTROL port	RS-232C cable (Cross)
of the projector	- (1)	(1)	CD
	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

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RS-232C port

of the computer

Connecting the cable

1. Turn off the projector and the computer.

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

2. the computer by a RS-232C cable (cross). Use the cable that fulfills the

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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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