Denon Professional DN-500CB User manual

Serial Command Protocol Guide
English

2
Table of Contents
Introduction.................................................................................................................................3
Support ..................................................................................................................................3
General Overview ..................................................................................................................3
Connecting the Host to DN-500CB ......................................................................................3
Communication Protocol............................................................................................................4
Types of Serial Communication............................................................................................4
Structure of the Codes..........................................................................................................5
Rules on Transmitting Command Codes .............................................................................5
Control Command Codes...........................................................................................................6
Status Request Command Codes/Status Information Codes ..................................................7
Appendix.....................................................................................................................................8
RS-232C Specifications ........................................................................................................8
Trademarks & Licenses.........................................................................................................8

3
Introduction
Thank you for purchasing the DN-500CB. At Denon Professional, performance and reliability mean as
much to us as they do to you. That’s why we design our equipment with only one thing in mind—to
make your performance the best it can be.
Support
For the latest information about this product (documentation, technical specifications, system
requirements, compatibility information, etc.) and product registration, visit denonpro.com.
For additional product support, visit denonpro.com/support.
General Overview
With RS-232C serial remote control, a “host” machine such as a PC can be used to operate your DN-
500CB. Throughout this document, the equipment used to control DN-500CB will be called the host.
To learn more about the different types of serial communication and the code structure it requires, see
the Communication Protocol section that starts on the next page. To the view the complete list of
serial command codes, see the Control Command Codes and Status Request Command
Codes/Status Information Codes sections later in this manual.
Connecting the Host to DN-500CB
For serial remote control, you must first connect the host to your DN-500CB. Use an RS-232C Straight
Cable (9-Pin D-Sub Male) to connect the RS-232C input on the rear panel of your DN-500CB to the
corresponding input on the host. Make sure that the host is running appropriate software for serial
communication.
DN-500CB Rear Panel
Personal Computer
RS-232C Straight Cable

4
Communication Protocol
Types of Serial Communication
Three types of serial communication can be transmitted between the host and DN-500CB:
1. Control commands sent to DN-500CB from the
host
You can use control commands to make DN-
500CB perform a desired function (such as playing
or skipping a track).
When DN-500CB receives a control command
from the host, DN-500CB executes the command.
2. Status request commands sent to DN-500CB
from the host
You can use a status request command to
determine the current state of one of DN-500CB’s
components (such as whether there is a disc in the
CD slot, how many tracks are in the current
tracklist, etc.).
When DN-500CB receives a status request
command from the host, DN-500CB answers the
host with the requested status information.
3. Status information automatically sent to the
host when a change is made from DN-500CB
When a change to DN-500CB is made from the
device itself, DN-500CB automatically sends
status information to the host.
DN-500CB Host
Control
Command
DN-500CB Host
DN-500CB Host
Status
Request
Command
Status
Information
Status
Information

5
Structure of the Codes
Serial communication between the host and DN-500CB uses ASCII Code from 0x20 to 0x7F.
All control command codes, status request command codes, and status information codes require
three components that form a “packet.” In order, the components are the start character + ID, the
command, and the end character (0x0D):
1. Start Character + ID: @ (0x40) + 0 (0x30)
2. Command: some letters and/or numbers that stand for a controllable feature of DN-500CB
3. End Character: \r (0x0D)
The required start character/ID and end character are the same in all codes, whereas the command
portion varies with each code.
For example, the full control command code that the host would use to power on DN-500CB would be
@0PW00\r:
@0 PW00 \r
Rules on Transmitting Command Codes
• When DN-500CB receives a control command or status request command from the host, DN-
500CB should respond within 300 ms.
• When DN-500CB successfully executes a command that it receives from the host, DN-500CB
sends an ACK signal (0x06) to the host (as well as the status information code in the case of a
status request command).
• If DN-500CB receives an unknown command from the host or if a received command fails for some
other reason, DN-500CB will send a NACK signal (0x15) to the host.
• When sending consecutive commands from the host, do not send the second command until DN-
500CB has answered the first with the ACK (0x06) or NACK (0x15) signal. If the second command is
sent before the ACK (0x06) or NACK (0x15) signal is received, DN-500CB will send the “Busy”
status information code (@0BDERBUSY) to the host.
• If DN-500CB does not receive a command that the host sent within 300 ms, the host will
automatically send the same command up to two additional times. If DN-500CB still does not
receive the command after the second automatic attempt, the process will timeout, and the host
will send the end character to DN-500CB.
• Do not send a second status request command from the host until DN-500CB has responded to
the first.
• When sending a command to DN-500CB from the host, make sure that no longer than 5 ms passes
between entering each character in the command code.
• Wait at least one second after sending the Power On command before sending the next command.
• When status information is automatically sent to the host after a change to DN-500CB is made from
the device itself, the host will send an ACK (0x06) signal to DN-500CB. If DN-500CB does not
receive the ACK signal within 300 ms, it will automatically send the status information to the host
again. If DN-500CB then fails to receive the ACK (0x06) signal again, the process will timeout.
Start Character
+ ID
Command
End Characte
r

6
Control Command Codes
Control Commands
(Host →DN-500CB)
CATEGORY CONTENTS CODE DESCRIPTION
Power Power On @0PW00 Powers on DN-500CB
Power Off @0PW01 Powers off DN-500CB
Disc Drive Eject @0PCDTRYOP Ejects the disc from the CD slot
Track Playback
Play @02353 Plays the current track
Pause @02348 Pauses the current track
Stop @02354 Stops the current track
Turn Mute On @0mt00 Mutes audio for the current track
Turn Mute Off @0mt01 Unmutes audio for the current track
Track Selection
Restart/Previous Track @02333 Restarts the current track or skips to the
previous track in the tracklist
Next Track @02332 Skips to the next track in the tracklist
Select Track Number @0Trnnnn Selects the track corresponding to the entered
number, where nnnn (number) = 0001 - 9999
Track Searching Rewind @0PCSLSR Rewinds the current track
Fast Forward @0PCSLSF Fast forwards the current track
Number Buttons Enter Number @0PCTKEYnSelects the track corresponding to the entered
number, where n (number) = 0 - 9
Time Display
Display Elapsed @0PCTMDEL
Sets the Display screen to show the amount of
time that has passed in the currently selected
track
Display Total Elapsed @0PCTMDTL Sets the Display screen to show the amount of
time that has passed in the current tracklist
Display Total Remaining @0PCTMDTR Sets the Display screen to show the amount of
time remaining in the current tracklist

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Status Request Command Codes/Status Information Codes
Status Request
Commands
(Host →DN-500CB)
Status Information
(DN-500CB →Host)
DESCRIPTION
REQUEST CODE ANSWER CODE
Power Status @0?PW
On ACK The power is on
Off No answer The power is off
CD Status @0?CD No Disc @0CDNC There is no disc in the CD slot
Disc In @0CDCI There is a disc in the CD slot
Track Status @0?ST
Playing @0STPL The current track is playing
Paused @0STPP The current track is paused
Rewinding @0STDVFR The current track is rewinding
Fast Forwarding @0STDVFF The current track is fast forwarding
Track Number @0?Tr Number of the current
track @0Trnnnn
The current track’s number within the
tracklist, where nnnn (number) = 0000
- 9999; nnnn = UNKN if the track
number is undetectable
Tracklist Size @0?Tt Total number of tracks @0Ttnnnn
The total number of tracks in the
current tracklist, where nnnn (number)
= 0000 - 9999; nnnn = UNKN if the
total number of tracks is undetectable
Track Title @0?ti Title of the current track @0tixxx The title of the current track, where
xxx = up to 64 characters of the title
Track Artist @0?at Artist on the current track @0atxxx
The name of the artist on current
track, where xxx = up to 64 characters
of the artist name
Album Title @0?al Album for the current track @0alxxx
The name of the album that the
current track is on, where xxx = up to
64 characters of the album name
Track Time @0?tl Time position of the current
track @0tlMMMSS
The time position of the current track,
where MMM (minutes) = 000 - 999
and SS (seconds) = 00 - 59
Elapsed Track
Time @0?ET Time elapsed in the track @0EThhhmmss
The amount of time that has elapsed
in the current track, where hhh (hours)
= 000 - 999, mm (minutes) = 00 - 59,
and ss (seconds) = 00 - 59
Remaining
Track Time @0?RM Time remaining in the track @0RMhhhmmss
The amount of time remaining before
the current track ends, where hhh
(hours) = 000 - 999, mm (minutes) =
00 -59, and ss (seconds) = 00 - 59

8
Appendix
RS-232C Specifications
Connector 9-Pin D-sub Female
Mode Full Duplex
Transfer Rate 9600, 38400, or 115200 bps
Data Length 8 bits
Parity None
Start Bit 1 bit
Stop Bit 1 bit
Flow Control None
Pin Arrangement Pin Number Signal Name
1 Ground
6 NC
2 TxD
7 RTS*
3 RxD
8 NC
4 NC
9 NC
5 S. Ground
*5 V / 500 mA power supply can be used for RTS.
Trademarks & Licenses
Denon is a trademark of D&M Holdings Inc., registered in the U.S. and other countries. Denon Professional products are
produced by inMusic Brands, Inc., Cumberland, RI 02864, USA.
All other product names, company names, trademarks, or trade names are those of their respective owners.

denonpro.com
Manual Version 1.4