JVC DLA-HX1U Instruction Manual - Page 59

RS-232C external control, Communication Specifications, Command Format

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Specifications Ⅵ RS-232C external control By connecting a computer to the projector with a RS-232C cross cable (D-sub 9 pins), you can control the projector with the computer. The commands to control the projector and the response data format against the received commands are explained here. For details, please consult the authorized dealer where you purchased your projector. 1. Communication Specifications The communication specifications are as follows. Baud rate Data length Parity Stop bit Flow control 9600 bps/19200 bps 8 bits None 1 bit None 2. Command Format 2-1 Command data format When sending a control command to the projector, use the following data format. [ Header ID SP Command SP Parameter CR Header : Designates the head of data and the data type. : ! (21h): Assigns command to the projector. : ? (3Fh): Query to the projector. (Asking command) ID : 1: The identification number of the projector. (Manufacturer set value 1) SP : Designates the delimiter for ID, Command, and Parameter. (20h) CR : Designates the terminal of the data. (0Dh) * [ ] is not necessary for Asking command. [ [ 2-2 Response data format Upon executing a control command it has received, 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: The identification number of the projector. (Manufacturer set value 1) SP : Designates the delimiter for ID, Command, and Parameter. (20h) Normal Termination Status : 0 (30h) CR : Designates the terminal of the data. (0Dh) 2-3 Parameters used for the data format The following three kinds of parameters are used for control commands and response data. 1) Numeric value 2) ON/OFF 3) Special parameters Each parameter is as follows: 1) Numeric value A 2-byte hexadecimal value (sign included) is represented by a set of 4 digit (4 bytes) characters. Designated range: 8000 to 7FFF. 2) ON/OFF Shows the status (ON/OFF) of the projector, such as POWER and HIDE. Character 0 1 Hex. 30 31 Meaning OFF ON 59

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59
Specifications
±
RS-232C external control
By connecting a computer to the projector with a RS-232C cross cable (D-sub 9 pins), you can control the projector with the
computer. The commands to control the projector and the response data format against the received commands are explained
here.
For details, please consult the authorized dealer where you purchased your projector.
1.
Communication Specifications
The communication specifications are as follows.
Baud rate
Data length
Parity
Stop bit
Flow control
2.
Command Format
2-1 Command data format
When sending a control command to the projector, use the following data format.
Header
: Designates the head of data and the data type.
: ! (21h): Assigns command to the projector.
: ? (3Fh): Query to the projector. (Asking command)
ID
: 1: The identification number of the projector. (Manufacturer set value 1)
SP
: Designates the delimiter for ID, Command, and Parameter. (20h)
CR
: Designates the terminal of the data. (0Dh)
* [
] is not necessary for Asking command.
2-2 Response data format
Upon executing a control command it has received, the projector sends back the following response data to the computer:
Header
: Designates the head of data.
:@ (40h): Fetches data from the projector.
ID
:1: The identification number of the projector. (Manufacturer set value 1)
SP
:Designates the delimiter for ID, Command, and Parameter. (20h)
Normal Termination Status
: 0 (30h)
CR
: Designates the terminal of the data. (0Dh)
2-3 Parameters used for the data format
The following three kinds of parameters are used for control commands and response data.
1) Numeric value
2) ON/OFF
3) Special parameters
Each parameter is as follows:
1) Numeric value
A 2-byte hexadecimal value (sign included) is represented by a set of 4 digit (4 bytes) characters.
Designated range: 8000 to 7FFF.
2) ON/OFF
Shows the status (ON/OFF) of the projector, such as POWER and HIDE.
[
[
[
[
9600 bps/19200 bps
8 bits
None
1 bit
None
Character
0
1
Hex.
30
31
Meaning
OFF
ON
Header
SP
ID
Parameter
CR
SP
Command
Header
SP
ID
Parameter
CR
SP
Normal Termination Status