Rs-232C Interface; Communication Specifications; Command Format - JVC DLA-SH4KNL Instructions Manual

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
Data Length
Parity
Stop Bit
Flow Control

Command Format

Command Data Format (PC Projector)
When sending a control command to this unit, use the following data format:
Header ID SP
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 (Projector PC)
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
* [ ] is not applicable when sending commands to the projector.
34
19200 bps
8 bit
None
1 bit
None
[
Command SP
[
Normal
Termination SP
Status
: 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)
Parameter SP Parameter
Parameter SP
]
• • •
SP
• • •
Parameter SP
CR
]
CR