Denon DNP-720AE RS-232 / IP control commands

Summary

Network audio player (DNP-720AE / DNP-720AE SE) controlled via the Denon SYSTEM control protocol. Source declares the application terminal as Ethernet (TCP port 23, ASCII commands terminated with CR 0x0D). RS-232C connector pinout and serial config are documented in the source for reference, but the application model uses Ethernet.

Transport

protocols:
  - tcp
  - serial
addressing:
  port: 23  # TCP port 23 (telnet), per source
serial:
  baud_rate: 9600
  data_bits: 8
  parity: none
  stop_bits: 1
  flow_control: none
auth:
  type: none  # inferred: no auth procedure in source

Traits

- powerable  # inferred from PWON / PWSTANDBY commands
- routable   # inferred from SI (input select) commands
- queryable  # inferred from PW?, SI?, FV?, TM?, TFAN?, TPAN? query commands

Actions

- id: power_on
  label: Power ON
  kind: action
  command: "PWON<CR>"
  params: []

- id: power_standby
  label: Power STANDBY
  kind: action
  command: "PWSTANDBY<CR>"
  params: []

- id: power_status_query
  label: Power Status Query
  kind: query
  command: "PW?<CR>"
  params: []

- id: select_input_tuner
  label: Select Input TUNER
  kind: action
  command: "SITUNER<CR>"
  params: []

- id: select_input_rhapsody
  label: Select Input RHAPSODY
  kind: action
  command: "SIRHAPSODY<CR>"
  params: []

- id: select_input_napster
  label: Select Input NAPSTER
  kind: action
  command: "SINAPSTER<CR>"
  params: []

- id: select_input_pandora
  label: Select Input PANDORA
  kind: action
  command: "SIPANDORA<CR>"
  params: []

- id: select_input_lastfm
  label: Select Input LASTFM
  kind: action
  command: "SILASTFM<CR>"
  params: []

- id: select_input_iradio
  label: Select Input IRADIO
  kind: action
  command: "SIIRADIO<CR>"
  params: []

- id: select_input_server
  label: Select Input SERVER
  kind: action
  command: "SISERVER<CR>"
  params: []

- id: select_input_usb
  label: Select Input USB
  kind: action
  command: "SIUSB<CR>"
  params: []

- id: select_input_query
  label: Current Input Query
  kind: query
  command: "SI?<CR>"
  params: []

- id: favorite_direct
  label: FAVORITE Direct Change
  kind: action
  command: "FV{favorite_no}<CR>"
  params:
    - name: favorite_no
      type: integer
      description: Two or three ASCII characters for FAVORITE number (per source: "uses two or three ASCII characters")

- id: favorite_query
  label: FAVORITE List Query
  kind: query
  command: "FV ?<CR>"
  params: []

- id: tuner_frequency_up
  label: TUNER Frequency UP
  kind: action
  command: "TFANUP<CR>"
  params: []

- id: tuner_frequency_down
  label: TUNER Frequency DOWN
  kind: action
  command: "TFANDOWN<CR>"
  params: []

- id: tuner_frequency_set
  label: TUNER Frequency Set
  kind: action
  command: "TFAN{freq}<CR>"
  params:
    - name: freq
      type: string
      description: "6-digit frequency. >050000 = AM (kHz). <050000 = FM (MHz). Example: TFAN105000 = 1050.00 kHz AM"

- id: tuner_frequency_query
  label: TUNER Frequency Query
  kind: query
  command: "TFAN?<CR>"
  params: []

- id: tuner_preset_up
  label: TUNER Preset UP
  kind: action
  command: "TPANUP<CR>"
  params: []

- id: tuner_preset_down
  label: TUNER Preset DOWN
  kind: action
  command: "TPANDOWN<CR>"
  params: []

- id: tuner_preset_set
  label: TUNER Preset Direct
  kind: action
  command: "TPAN{preset_no}<CR>"
  params:
    - name: preset_no
      type: string
      description: "Two-character preset number (e.g. TPAN50 = PRESET No.50)"

- id: tuner_preset_query
  label: TUNER Preset Query
  kind: query
  command: "TPAN?<CR>"
  params: []

- id: tuner_preset_memory
  label: TUNER Preset Memory
  kind: action
  command: "TPANMEM{preset_no}<CR>"
  params:
    - name: preset_no
      type: string
      description: "Two-digit preset slot to store into (e.g. TPANMEM05)"

- id: tuner_band_am
  label: TUNER Band AM
  kind: action
  command: "TMANAM<CR>"
  params: []

- id: tuner_band_fm
  label: TUNER Band FM
  kind: action
  command: "TMANFM<CR>"
  params: []

- id: tuner_band_query
  label: TUNER Band/Mode Query
  kind: query
  command: "TM?<CR>"
  params: []

- id: tuner_mode_auto
  label: TUNER Mode AUTO
  kind: action
  command: "TMANAUTO<CR>"
  params: []

- id: tuner_mode_manual
  label: TUNER Mode MANUAL
  kind: action
  command: "TMANMANUAL<CR>"
  params: []

- id: menu_cursor_up
  label: Menu Cursor Up
  kind: action
  command: "MNCUP<CR>"
  params: []

- id: menu_cursor_down
  label: Menu Cursor Down
  kind: action
  command: "MNCDN<CR>"
  params: []

- id: menu_cursor_left
  label: Menu Cursor Left
  kind: action
  command: "MNCLT<CR>"
  params: []

- id: menu_cursor_right
  label: Menu Cursor Right
  kind: action
  command: "MNCRT<CR>"
  params: []

- id: menu_enter
  label: Menu Enter
  kind: action
  command: "MNENT<CR>"
  params: []

- id: favorite_on
  label: FAVORITE ON
  kind: action
  command: "MNFAV ON<CR>"
  params: []

- id: favorite_off
  label: FAVORITE OFF
  kind: action
  command: "MNFAV OFF<CR>"
  params: []

- id: ns_cursor_up
  label: Network Cursor Up
  kind: action
  command: "NS90<CR>"
  params: []

- id: ns_cursor_down
  label: Network Cursor Down
  kind: action
  command: "NS91<CR>"
  params: []

- id: ns_cursor_left
  label: Network Cursor Left
  kind: action
  command: "NS92<CR>"
  params: []

- id: ns_cursor_right
  label: Network Cursor Right
  kind: action
  command: "NS93<CR>"
  params: []

- id: ns_enter
  label: Network Enter (Play/Pause)
  kind: action
  command: "NS94<CR>"
  params: []

- id: ns_play
  label: Network Play
  kind: action
  command: "NS9A<CR>"
  params: []

- id: ns_pause
  label: Network Pause
  kind: action
  command: "NS9B<CR>"
  params: []

- id: ns_stop
  label: Network Stop
  kind: action
  command: "NS9C<CR>"
  params: []

- id: ns_skip_plus
  label: Network Skip Plus
  kind: action
  command: "NS9D<CR>"
  params: []

- id: ns_skip_minus
  label: Network Skip Minus
  kind: action
  command: "NS9E<CR>"
  params: []

- id: ns_repeat_one
  label: Network Repeat One
  kind: action
  command: "NS9H<CR>"
  params: []

- id: ns_repeat_all
  label: Network Repeat All
  kind: action
  command: "NS9I<CR>"
  params: []

- id: ns_repeat_off
  label: Network Repeat Off
  kind: action
  command: "NS9J<CR>"
  params: []

- id: ns_random_repeat_all
  label: Network Random On / Repeat All
  kind: action
  command: "NS9K<CR>"
  params: []

- id: ns_random_off
  label: Network Random Off
  kind: action
  command: "NS9M<CR>"
  params: []

- id: ns_browse_remote_toggle
  label: Browse Mode / Remote Mode Toggle (iPod Direct)
  kind: action
  command: "NS9W<CR>"
  params: []

- id: ns_preset1_call
  label: Net Audio Preset 1 Call
  kind: action
  command: "NSP1<CR>"
  params: []

- id: ns_preset2_call
  label: Net Audio Preset 2 Call
  kind: action
  command: "NSP2<CR>"
  params: []

- id: ns_preset3_call
  label: Net Audio Preset 3 Call
  kind: action
  command: "NSP3<CR>"
  params: []

- id: ns_preset1_memory
  label: Net Audio Preset 1 Memory
  kind: action
  command: "NSP1 MEM<CR>"
  params: []

- id: ns_preset2_memory
  label: Net Audio Preset 2 Memory
  kind: action
  command: "NSP2 MEM<CR>"
  params: []

- id: ns_preset3_memory
  label: Net Audio Preset 3 Memory
  kind: action
  command: "NSP3 MEM<CR>"
  params: []

- id: ns_preset_status
  label: Net Audio Preset 1-3 Status (UTF-8)
  kind: query
  command: "NSP<CR>"
  params: []

- id: ns_onscreen_info
  label: Request Onscreen Display Information
  kind: query
  command: "NSE<CR>"
  params: []

- id: ns_direct_char_search
  label: Direct Character Search
  kind: action
  command: "NSD{char}<CR>"
  params:
    - name: char
      type: string
      description: "Single character 0-9 or A-Z (except iPod Direct)"

Feedbacks

- id: power_state
  type: enum
  values: [on, standby]
  notes: "Device emits EVENT PWON<CR> or PWSTANDBY<CR> on power state change; PW?<CR> query returns the same."

- id: current_input
  type: enum
  values: [tuner, rhapsody, napster, pandora, lastfm, iradio, server, usb]
  notes: "Device emits SItoken<CR> EVENT on input change; SI?<CR> query returns it."

- id: favorite_name
  type: string
  notes: "EVENT FV + favorite_no + 35-byte fixed payload: char count + null + name (UTF-8). See source page 13 for layout."
  example: "FV25FM-87.50MHz<CR>"

- id: tuner_frequency
  type: string
  notes: "EVENT TFAN******<CR> on frequency change. 6 digits, >050000 = AM kHz, <050000 = FM MHz."

- id: tuner_preset
  type: string
  notes: "EVENT TPANA1<CR> example. PRESET number A-prefixed in the source's example."

- id: tuner_band_mode
  type: enum
  values: [anam, anfm, anauto, anmanual]
  notes: "EVENT TMANAM / TMANFM / TMANAUTO / TMANMANUAL on band/mode change."

- id: ns_preset_status
  type: object
  notes: "EVENT NSP01<20-digit name><CR> through NSP03<20-digit name><CR> for presets 1-3 (UTF-8)."

- id: ns_onscreen_lines
  type: object
  notes: "EVENT NSE0 through NSE8 (9 lines) of 96-byte fixed UTF-8 payload each, returned in response to NSE<CR>. Format: <marker><95 chars max>_<?...>. See source page 15."

Variables

# UNRESOLVED: no settable scalar variables distinct from discrete actions in the source

Events

# The source documents unsolicited EVENT messages. They share the COMMAND+PARAMETER+CR
# format and represent state-change notifications. See Feedbacks section for the
# enumerated EVENTs (PW, SI, FV, TF, TP, TM, NS preset status, NSE lines).

Macros

# UNRESOLVED: no multi-step sequences described in source

Safety

confirmation_required_for: []
interlocks: []
# UNRESOLVED: source contains no safety warnings, interlock procedures, or
# power-on sequencing requirements. Note K) in the source says "wait 1 second
# before next command after PWON" but that is a timing note, not a safety interlock.

Notes

Application model DNP720AE(SE) declares "Application terminal: Ethernet". The RS-232C connector spec (Section Ⅰ) is included in the source for reference but the device's control interface is TCP port 23.
All commands are ASCII CODE + parameter + CR (0x0D). Allowed character range: 0x20 to 0x7F. 0x0D is used only as the terminator.
Maximum data length: 135 bytes per message.
RESPONSE must be returned within 200 ms of receiving a request command (COMMAND+?+CR).
Power-on sequencing: wait 1 second after PWON before sending the next COMMAND.
TF/TP/TM commands only operate when the input source is TUNER.
Source is document version "Ver.8.0.0" of the Denon SYSTEM control protocol; do not confuse with device firmware version.
The document mentions MU and MV commands in the protocol overview (mute and master volume) but does not list their parameter values in the supplied source — they are referenced but not enumerated.

Provenance

source_domains:
  - assets.denon.com
source_urls:
  - https://assets.denon.com/documentmaster/uk/dnp720ae_se_system_protocol_ver1_03.pdf
retrieved_at: 2026-04-29T16:29:23.093Z
last_checked_at: 2026-06-02T21:41:28.434Z

Verification Summary

verdict: verified
checked_at: 2026-06-02T21:41:28.434Z
matched_actions: 60
action_count: 60
confidence: medium
summary: "All 60 spec actions matched with exact wire-level commands; transport parameters (TCP port 23, baud 9600, 8/N/1) verified verbatim in source. (5 unresolved item(s) noted in Known Gaps.)"

Known Gaps

- "firmware version not stated; protocol version (Ver.8.0.0) is a document revision, not a device firmware version"
- "no settable scalar variables distinct from discrete actions in the source"
- "no multi-step sequences described in source"
- "source contains no safety warnings, interlock procedures, or"
- "MU/MV command parameter sets not enumerated in supplied source; firmware version not stated; 9L, 9N, 9O, 9P, 9Q, 9R, 9S, 9T, 9U, 9V NS codes not listed in source (only 90-94, 9A-9M, 9W shown)."

From the AI4AV catalog (https://ai4av.net) · ODbL-1.0

Denon Electronics DNP-720AE Control Spec

Compatible models