Command Structure

4.5Error Message

An error message consists of an E followed by a two-character error code.

Example: EN1N2<CR>

The error message occurs when the given command cannot be processed.

4.6Request Status Return

In response to a single request command, the status returns as a line of letters terminated by <CR>.

If multiple commands are sent within the same String, the player returns a separate status value upon completion of each command. A status value is a character string with a <CR> termination code.

Example: ?C?F<CR> ⇒ 02<CR> 10260<CR>

When the command is at the end of the command string, the R within the completion message is omitted.

Example:

ST?F<CR>

⇒

23005<CR> (completion omitted)

Example:

?FST<CR>

⇒

23005<CR>R<CR> (not omitted)

4.7Timing

A player needs a brief period after receiving a command before returning a Status Value or “R <CR>”. It is defined as follows:

T1 represents the time between the termination of the command string <CR> received and the beginning of the command execution. It is approximately 35ms maximum.

T2 represents the time for executing the command, depending upon the command type and the player’s condition. In case of a status request command such as “?F”, T2 requires less than 1ms.

T3 represents the time that is needed for transferring data (TxD) per byte. It requires a maximum of 4ms per byte. In case of the return data for “?F” request, a player is supposed to be back 8 bytes data, that is composed of 7 digit Frame number and “<CR>”. In this case the transfer time of each byte is not exactly the same with 4ms, it takes usually around 10ms for transferring 8 bytes data total, and it is supposed to take less than 16ms.

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Pioneer DVD-V7400 manual Error Message, Request Status Return, Timing, St?Fcr, ?Fstcr
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DVD-V7400 specifications

The Pioneer DVD-V7400 is a professional-grade DVD player that has gained recognition for its robust performance and versatility in various applications, especially in the fields of broadcasting, presentation, and event production. Released as part of Pioneer's renowned lineup of video playback equipment, the DVD-V7400 boasts several advanced features and technologies that set it apart from consumer-grade players.

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Overall, the Pioneer DVD-V7400 stands out as a reliable and feature-rich player, making it an excellent choice for professionals who require consistent performance and quality in their video playback solutions. With its wide compatibility, robust features, and ease of use, the DVD-V7400 continues to be a trusted option in the industry.
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