Canon LV-7565 Serial Functional Specification - Page 8

Note for Communications

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Expand Serial Command Specification Page 7 of 46 3. Note for Communications 3.1. The expand command is defined one command / one line that starts "C" and ends carriage return (0x0D). 3.2. When a projector receives carriage return (0x0D), it starts decoding. 3.3. There are two type of Expand Serial Command, Functional Execution Commands and Status Read Command. *Functional Execution Command "CF_BRIGHT_032" [CR] Note) _ means a space *Status Read Command "CR_RIGHT" [CR] 3.4. When it takes more than one second to receive one Command, it clears information of buffer. (Until the projector receives the carriage return since the projector has received the first data) 3.5. A projector sends a return command in a few ms to 8000ms after the projector has received the command. When the computer keeps sending some commands, it must wait sending next command until the projector has received the response. In short, make sure that the projector sends a return command, and then the computer can send next command. PC ! Projector Projector ! PC Command "CF_BRIGHT_032" [CR] "000" [CR] Command processing (a few ms - 8000ms) Response When a computer issues next command before receiving a return command, the projector may not operate properly. Command processing may not be accepted before the current command processing has not done.

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Expand Serial Command Specification
Page 7 of 46
3.
Note for Communications
3.1.
The expand command is defined one command / one line that starts “C” and ends carriage return
(0x0D).
3.2.
When a projector receives carriage return (0x0D), it starts decoding.
3.3.
There are two type of Expand Serial Command, Functional Execution Commands and Status Read
Command.
*Functional Execution Command
“CF_BRIGHT_032” [CR]
Note) _ means a space
*Status Read Command
“CR_RIGHT” [CR]
3.4.
When it takes more than one second to receive one Command, it clears information of buffer.
(Until the projector receives the carriage return since the projector has received the first data)
3.5.
A projector sends a return command in a few ms to 8000ms after the projector has received the
command.
When the computer keeps sending some commands, it must wait sending next
command until the projector has received the response.
In short, make sure that the projector
sends a return command, and then the computer can send next command.
Command
PC
!
Projector
“CF_BRIGHT_032”
[CR]
Projector
!
PC
“000”
[CR]
Command processing
Response
(a few ms - 8000ms)
When a computer issues next command before receiving a return command, the projector may
not operate properly.
Command processing may not be accepted before the current command
processing has not done.