PLC-ET30L Expand Serial Command Functional Specifications
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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.
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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].
