JVC DLA-M2000LU manual RS-232C external control, Communication Specifications, Command Format

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No.51781

RS-232C external control

By connecting a computer to the RS-232C terminal, you can control the projector. Use a reverse connection cable as the RS- 232C connection cable.

The commands to control the projector and the response data against the received commands are explained here. For further information, please consult the dealer where you purchased your projector or consult the Service Center.

1. Communication Specifications

The communication specifications are as follows:

Baud rate	9600bps / 19200bps*
Data length	8 bits
Parity	None
Stop bit	1 bit
Flow control	None

* Factory set value. To change the value, refer to “Setting and Adjusting Other Functions (OPTIONS)” on page 52.

2. Command Format

2-1. Command data format (from the computer to the projector)

When sending a control command, use the following data format.

					[			]
Header		ID	SP	Command		SP	Parameter		CR
Header:	Designates the head of data and the kind of data.
	“!” (21h): Control command to the projector
	“?” (2Fh): Query to the projector (Asking command)
ID:	“1” (fixed)
SP:	Designates the delimiter for ID, Command, and Parameter. (20h)
CR:	Designates the terminal of the data. (0Dh)

* [ ] is not necessary when Asking command.

2-2. Response data format (from the projector to the computer)

Upon executing the received control command, the projector sends back the following response data to the computer.

Header		ID	SP	Normal Termination Status	SP	Parameter	CR
Header:	Designates the head of data.
	“@” (40h): Fetches data from the projector.
ID:	“1” (fixed)
SP:	Designates the delimiter for ID, Command, and Parameter (20h)
Normal Termination Status: “0” (30h)
CR:	Designates the terminal of the data (0Dh)

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RS-232C external control

2-3 Parameters used for the data format

The following three kinds of parameters are prepared for the control command and response data.

(1) Numeric value

Designates the 2-byte hexadecimal value with the sign as the 4-digit (byte) characters.

Designation allowable range: “8000” to “7FFF”

(2) ON/OFF

Designates the status (ON/OFF) of the projector, such as POWER and HIDE.

Character	Hex.	Meaning
“0”	30	OFF
“1”	31	ON

(3)Special parameters

Input switching parameters:

Character	Hex.	Meaning
“0”	30	Y/C
“1”	31	VIDEO
“2”	32	PC1
“3”	33	PC2

Operation mode parameters:

Character	Hex.	Meaning
“0000”	30h, 30h, 30h, 30h	Stand-by mode
“0001”	30h, 30h, 30h, 31h	Power-on mode
“0002”	30h, 30h, 30h, 32h	Cool-down mode
“0004”	30h, 30h, 30h, 34h	Warning mode

3. Control command table

The control commands that can be sent from the computer are as follows:

Function	Command	Asking			Kind of data
		Power ON	ELSE	Numeric Value	ON/OFF	Special Data
OPERATE	U0F	–	–	–	✓	–
HIDE	U00	✓	–	–	✓	–
Right Left rev.	U17	✓	–	–	✓	–
Top Bottom inv.	U18	✓	–	–	✓	–
Keystone	U40	✓	–	✓	–	–
Input	U1A	✓	–	–	–	Y/C, VIDEO, PC1, PC2
Operation mode	Z03	✓	✓	–	–	Stand-by, Power-on,
						Cool-down, Warning

*Keystone: Numeric value can range from “FF80” to “0080”

*Operation mode: Only Asking command is possible

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