LV-7575 Expand Serial Command Functional Specifications

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3． Notes for communication

・ Expand Serial Command is defined as a single command per line that starts with “C” and ends with

carriage return (0x0D).

・ There are two types of commands; Functional Execution Commands and Status Read Command.

- Example of Functional Execution Command: “CF_BRIGHT_032” [CR]

- Example of Status Read Command: “CR_BRIGHT” [CR]

Note) “_” means a space

・ When it takes more than a second to receive a single command, it is not executed.

When it takes more than a second to receive carriage return (0x0D) since the reception of the first

data “C”, it clears the information of the receive buffer.

・ When the command pipelining, allow the interval time of no less than100ms after receiving return

value. (No less than 100 ms)

Command

PC → Projector “CF_BRIGHT_032” CR Next command

Projector → PC “000” CR

Return Value

(A few ms - 5s)

・ Do not send another command before the reception of the return value; the operation by the

commond is not ensured.

However this is not the case when no response is returned after more than 5 seconds.

・ It takes about 5 seconds for internal initialization after plugging in AC power. During this time, it

cannot process commands. Do not issue any command.

4． Notation Convention

・ Data from a controller to a projector is represented as COMMAND, and data from a projector to a

controller in response to the incoming command is represented as RESPONSE.

・ [CR]: Carriage Return Code

Carriage Return code is added to the end of the command.

Response is also followed by carriage return code.

・ _: Space Code

Space Code is represented as (_).

・ %1: Parameter included in Command

When there are more than one parameter, they are defined as %2, %3…

・ %%%: Error Code returned from a projector

Acceptable: “000”.

Unacceptable: See [7. Error Code Table].