Pioneer DVD-V5000 Command Protocol Manual page 14

NOTE: The player ignores codes in the command string such as <SPACE> or
<LF> (line feed) that have no affect on the player.
NOTE: Some commands, sent after a specialty command that includes an
AUTOSTOP setting, (PL, MF, MR, etc.), cause the player to execute the new
command before the AUTOSTOP is enacted (see Chapter 5, Command
Descriptions).
When all the commands in a string have finished executing, the player transmits
or returns the "complete" message that is represented by the capital letter R.
The player returns an R after a command has been executed. This response is
called the Automatic Status.
program to send the next command. If this function is not used, the command
processing Time must be taken into consideration before the next command is
sent.
If an error occurs, the player returns an error message such as E04.
message indicates an error has occurred as well as the type of error. Error
messages are in the form of EXX where XX represents a 2-digit error code.
In some cases, an incorrect command sends the player to Search within a non-
recorded area and the player returns an error message. Use the Request Status
function to determine current status (actual player hardware failures are rare).
• ?P to determine the Active mode of the player
• ?X, ?M, ?H, ?S to determine the player information, model name, player
region code, the setting of Advanced Setup Menu, etc.
• ?F, ?T, ?C, or ?R to determine the current Frame, Time, Chapter,
Title/Track number, respectively.
• ?V, ?K, ?G, ?Y, or ?Q to determine the disc information, disc type, total
Frame number, TOC information, etc.
The status functions are summarized below:
The Automatic Status signals the computer
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DVD-V5000 DVD Player
RS-232 Command Protocol
The