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Computer Control
3.3
Command and Status
The computer transmits a command to the DVD-V7200 and the player responds with the message, ‘execution complete’.
Example
COMPUTER
(1) “Search to Frame 1000”
DVD-V7200
(2) Search Execution
(3) Complete
(4) “Play to Frame 2000”
⇒
⇐
(5) Play Execution
(6) Complete
NOTE: The length of a command string is limited to 32 characters. Please refer to
COMMAND STRUCTURE.
When using a computer to control the DVD-V7200 player, follow the command protocols listed below:
•
ASCII character codes are used for the actual commands and status response
•
Command mnemonic is expressed as two (2) ASCII characters
•
Uppercase letters are recommended; however, usually there are no distinctions between the use of uppercase or lowercase letters
•
Some commands require an argument, (e.g. chapter number or speed)
•
Use a command as the terminator of the argument
The player executes a command as soon as the carriage return <CR> is received.
The <CR> acts as the command line terminator.
Example
CH<CR> : Set chapter for address mode
10SE<CR> : Search to chapter 10
The player has a command buffer, which stores a command string of up to 32 characters in length.
Example
10SE 20PL<CR> : Search to chapter 10 then play to 20
The command string enters into the buffer with the left character and continues sequentially from left to right. When the <CR> is entered, the commands are executed sequentially beginning with the first command in the buffer. In the example above, the first command is 10SE.
NOTE: The player ignores codes in the command string such as <SPACE> or <LF>
(line feed) which do not affect the player’s operation.
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PIONEER DVD-V7200 Industrial DVD Player RS-232 Command Protocol Manual
NOTE: Some commands, sent after a specialty command which 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.
The player returns an R after a command has been executed. This response is called the Automatic Status. The Automatic Status signals the computer 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. The 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 nonrecorded area and the player returns an error message. Use the Request Status function to determine the unit’s current status (actual player hardware failures are rare).
Apply one of the following methods to reset the player after an error has occurred:
•
Use ?P to determine the Active mode of the player
•
Use ?X, ?W, ?M, ?H, ?H ?S to determine the player information, model name, clock time, player region code, the setting of Industrial Player Menu, etc.
•
Use ?F, ?T, ?C, or ?R to determine the current frame, time, chapter, title/track number, respectively.
•
Use ?V, ?D, ?K, ?G, ?Y, or ?Q to determine the disc information, disc type, total frame number, TOC information, etc.
The status functions are summarized below:
Status Reporting
Auto Status
Auto Completion Message
Error Indication Message
Request Status
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