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RS-232C Command Reference (Presenter)
For information on using the RS-232C communication settings, refer to "Using the RS-
232C Connector" (p. 105).
Command Overview
A command consists of an ASCII code sequence containing "stx," to uppercase letters of
the alphabet, and a semicolon (";"). The two letters of the alphabet indicate the command
type. If the command has an argument, a colon (":") is inserted between the two letters
of the alphabet and the argument. When multiple arguments occur, they are separated
by commas (",").
"stx"
This is the ASCII code signal name (code number 02H [hexadecimal]) and
code that signals the command start.
":"
This is the code used by the Presenter to separate the command and its
arguments.
";"
This is the code used by the Presenter to signify the end of a command.
Example 1:
To start playback, send this ASCII command: stxPL;
Example 2:
To start the playback of video clip number 2 on palette number 0, send this
ASCII command: stxPA:0,2;
About the Protocol
Depending on the command, there are three different types of communication protocols.
Specifying an Action and Making a Setting to the Presenter
1.
Transmit the command from the control device to the Presenter.
2.
If the command was received correctly, the Presenter returns ACK, and if an error occurs,
the Presenter returns ER.
"ACK" is an ASCII-code signal name (code number 06H) that tells the control device that
the command was correctly received.
Querying a Presenter Setting
1.
Transmit the command from the control device to the Presenter.
2.
If the command was received correctly, the Presenter returns the setting status or the like
as a command. If an error occurs when receiving the command, the Presenter returns ER.
3.
If the command from the Presenter was received correctly, an ACK is returned. (This ACK
can be omitted.)
* If an ER command is sent to the Presenter, the Presenter resends the command it sent in step 2.
This command can also be omitted, in which case the procedure must be repeated from step 1.
Having the Presenter Automatically Send Commands
1.
The Presenter sends a command automatically. Returning an ACK or other command is
not required.
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