JVC DLA-SH4K instruction manual RS-232C Interface, Communication Specifications, Command Format

Operation and Settings

RS-232C Interface

You can control this projector by connecting the computer to this unit using a RS-232C cross cable (D-sub 9 pins). The commands to control this unit and the response data format against the received commands are explained here.

For details, please consult your authorized dealer.

Communication Specifications

Communication specifications for this unit are as follows:

Transfer Rate	19200 bps
Data Length	8 bit
Parity	None
Stop Bit	1 bit
Flow Control	None

Command Format

Command Data Format (PCProjector)

When sending a control command to this unit, use the following data format:

Header

ID

SP Command

[

SP Parameter SP Parameter SP

• • • ]

CR

Header	: Designates the head of data and the data type.
	“!” (21h): Assigns command to the projector (Command)
	“?” (3Fh): Query to the projector (Asking command)
ID	: “1”: Identification number of the projector (Factory setting is 1)
SP	: Designates the delimiter between ID and command, command and parameter, as well as parameter and
	parameter. (20h)
CR	: Designates the terminal of the data. (0Dh)

* [ ] is not necessary for Asking command.

Response Data Format (ProjectorPC)

Upon executing a control command, this unit sends back response data to the computer in this format.

Header ID SP

Header

ID

SP

Normal Termination Status

CR

Normal	[ SP Parameter SP Parameter SP • • • ] CR
TerminationStatus

:Designates the head of the response data. “@” (40h): Fetches data from the projector

:“1”: Identification number of the projector (Factory setting is 1)

:Designates the delimiter between ID and normal termination status, normal termination status and parameter, as well as parameter and parameter. (20h)

:“0” (30h)

:Designates the terminal of the data. (0Dh)

* [ ] is not applicable when sending commands to the projector.

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