{
 "manufacturer": "Intesis (HMS Networks)",
 "manufacturer_slug": "intesis",
 "model": "INMBSDAI001R000 Daikin VRV / Sky Air to Modbus RTU gateway",
 "model_slug": "inmbsdai001r000",
 "short_model": "INMBSDAI001R000 Daikin VRV",
 "aliases": [
  "INMBSDAI001R000",
  "Intesis Daikin VRV Modbus"
 ],
 "equipment_type": "VRF / split AC gateway",
 "applies_to": "One Daikin VRV or Sky Air indoor unit (or group) on the P1P2 bus via INMBSDAI001R000, user manual v1.0.1.",
 "summary": "Modbus RTU server that connects to the P1P2 remote-controller bus of a Daikin VRV or Sky Air indoor unit. All points are 16-bit holding registers covering on/off, mode, fan, vanes, setpoint, room temperature, alarm and Daikin error code, plus window-contact and virtual-temperature features.",
 "transport": [
  "RTU"
 ],
 "defaults": {
  "unit_id": 1,
  "baud": 9600,
  "parity": "None",
  "data_bits": 8,
  "stop_bits": 2,
  "tcp_port": null
 },
 "addressing": {
  "convention": "0-based",
  "note": "Tables list a 'protocol address' (base 0) and a 'PLC address' (base 1). The protocol address is the wire address and is what 'documented' holds; PLC tools that add 1 should use the PLC column."
 },
 "default_word_order": null,
 "firmware": null,
 "source": {
  "title": "INMBSDAI001R000 Modbus RTU Gateway - Compatible with VRV and Sky air conditioning systems commercialized by Daikin - User Manual",
  "doc_number": "User Manual Version 1.0.1",
  "revision_date": "2024-03-01",
  "url": "https://www.hms-networks.com/docs/default-source/products/intesis/manuals-and-guides---manuals/user-manual-inmbsdai001r000.pdf",
  "pages": "printed pp. 6-12 (PDF pp. 9-15); error codes printed p. 16 onward"
 },
 "notes": [
  "Every register is documented as a 16-bit unsigned holding register and no temperature range in the manual goes below zero, so temperatures are UINT16. The 'no value' marker the manual writes as -32768 is raw 0x8000 (32768) and is listed as an enum entry. Register 5 prints the marker as -32678, an apparent typo, so no enum is given there.",
  "Temperature scale follows DIP SW4: x1 °C (factory default, stated consistently in this manual), x10 °C or °F (no °F x10). Scale 1 / °C here matches the default only; use 0.1 if x10 is selected.",
  "Baud rate register 14 lists the selectable rates but not the numeric code for each, so no enum is given.",
  "The error-code enum (Daikin remote-controller codes) is not reproduced; see the manual's error code table."
 ],
 "registers": [
  {
   "table": "holding_register",
   "address": 0,
   "documented": "0",
   "name": "AC unit On/Off",
   "description": "",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Off",
    "1": "On"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 1,
   "documented": "1",
   "name": "AC unit mode",
   "description": "Available modes depend on the indoor unit.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Auto",
    "1": "Heat",
    "2": "Dry",
    "3": "Fan",
    "4": "Cool"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 2,
   "documented": "2",
   "name": "AC unit fan speed",
   "description": "Available speeds depend on the indoor unit.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Auto",
    "1": "Low",
    "2": "Mid",
    "3": "High"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 3,
   "documented": "3",
   "name": "AC unit up/down vane position",
   "description": "Available positions depend on the indoor unit.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "1": "Position 1 (Horizontal)",
    "2": "Position 2 (Horizontal)",
    "3": "Position 3 (Medium)",
    "4": "Position 4 (Vertical)",
    "5": "Position 5 (Vertical)",
    "10": "Swing"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 4,
   "documented": "4",
   "name": "AC unit temperature setpoint",
   "description": "Setpoint 16..31 °C (61..88 °F). SW4 x1 °C assumed (x10: 0.1, or °F).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "°C",
   "access": "RW",
   "values": {
    "32768": "Not initialised / no value (0x8000; manual writes -32768)"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 5,
   "documented": "5",
   "name": "AC unit temperature reference",
   "description": "Unit room temperature, 10..38 °C. SW4 x1 °C assumed (x10: 0.1, or °F).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "°C",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 6,
   "documented": "6",
   "name": "Window contact",
   "description": "Virtual window contact written from Modbus.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Closed",
    "1": "Open"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 7,
   "documented": "7",
   "name": "Gateway disablement",
   "description": "Stops the gateway passing commands; stored in NVM.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Gateway enabled",
    "1": "Gateway disabled"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 8,
   "documented": "8",
   "name": "AC remote control disablement",
   "description": "Blocks the wired remote on the bus; stored in NVM.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Remote control enabled",
    "1": "Remote control disabled"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 9,
   "documented": "9",
   "name": "AC unit operation time",
   "description": "Hours the unit has been on; stored in NVM.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "h",
   "access": "RW",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 10,
   "documented": "10",
   "name": "AC unit alarm status",
   "description": "",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": {
    "0": "No alarm condition",
    "1": "Alarm condition"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 11,
   "documented": "11",
   "name": "Error code",
   "description": "Daikin error number (manual error table); 65535 = no comms with AC unit.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": {
    "0": "No error present",
    "65535": "Communication error with the AC unit"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 13,
   "documented": "13",
   "name": "Open window switch-off timeout",
   "description": "Countdown after window opens before unit switches off (0..30, default 30).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "min",
   "access": "RW",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 14,
   "documented": "14",
   "name": "Modbus RTU baud rate",
   "description": "Baud rate in use (set on DIP switches).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 15,
   "documented": "15",
   "name": "Device Modbus server address",
   "description": "Range 1..63.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 21,
   "documented": "21",
   "name": "Maximum number of fan speeds",
   "description": "",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 22,
   "documented": "22",
   "name": "External ambient temperature (Modbus)",
   "description": "Room temperature written from Modbus (virtual temperature). SW4 x1 °C assumed (x10: 0.1, or °F).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "°C",
   "access": "RW",
   "values": {
    "32768": "Not initialised / no value (0x8000; manual writes -32768)"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 23,
   "documented": "23",
   "name": "AC real temperature setpoint",
   "description": "Setpoint actually applied in the indoor unit. SW4 x1 °C assumed (x10: 0.1, or °F).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "°C",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 26,
   "documented": "26",
   "name": "AC unit left/right vane position",
   "description": "",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Auto",
    "10": "Swing"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 48,
   "documented": "48",
   "name": "Switch value",
   "description": "Current DIP switch settings.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 49,
   "documented": "49",
   "name": "Device ID",
   "description": "Reads 0x0801.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 50,
   "documented": "50",
   "name": "Software version",
   "description": "",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 55,
   "documented": "55",
   "name": "Under voltage counter",
   "description": "Range 0..300.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 81,
   "documented": "81",
   "name": "Error address",
   "description": "Address of the indoor unit reporting the error.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 97,
   "documented": "97",
   "name": "Block periodic sendings",
   "description": "1 = only forward Modbus writes that change the value (FW 1.5+).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Non-blocked",
    "1": "Blocked"
   },
   "bits": null,
   "offset": 0
  }
 ],
 "integration": {
  "summary": "Wire RS-485 A/B, set the address on SW3 and the baud on SW3/SW4, reboot, then read holding registers 0-11 with function 03 and write with function 06. Check SW1: without a Daikin wired remote on the P1P2 bus the gateway must be set as header.",
  "minimum_registers": [
   {
    "table": "holding_register",
    "address": 0,
    "why": "On/off"
   },
   {
    "table": "holding_register",
    "address": 1,
    "why": "Mode"
   },
   {
    "table": "holding_register",
    "address": 2,
    "why": "Fan speed"
   },
   {
    "table": "holding_register",
    "address": 4,
    "why": "Setpoint"
   },
   {
    "table": "holding_register",
    "address": 5,
    "why": "Room temperature"
   },
   {
    "table": "holding_register",
    "address": 10,
    "why": "Alarm flag"
   },
   {
    "table": "holding_register",
    "address": 11,
    "why": "Error code"
   }
  ],
  "enable": "No enable step. Set a slave address on SW3 and keep register 7 (gateway disablement) at 0 so Modbus commands reach the unit.",
  "watchdog": null,
  "quirks": [
   "Temperature scale changes with DIP SW4 (x1 °C, x10 °C or °F).",
   "Function 16 is accepted only with a quantity of one register.",
   "At most 50 registers per read request.",
   "8-N-2 by default; 8-N-1 is auto-detected."
  ],
  "setup": [
   "SW1: header/follower role on the P1P2 bus, VRV operation-mode master/slave, and which sensor is the room reference.",
   "SW3 positions 1-6: slave address (binary). Baud on SW3/SW4 (9600 default).",
   "SW4: temperature scale and 120 Ω termination.",
   "DIP changes need a reboot."
  ],
  "gotchas": [
   "Factory SW1 setting is follower, which needs a Daikin wired remote acting as header on P1P2.",
   "Writing an external temperature to register 22 turns on virtual temperature: the wired remote can no longer change the setpoint and register 23 may differ from register 4.",
   "Error code 65535 means the gateway lost the indoor unit."
  ]
 },
 "page": "https://easymodbus.com/modbus-register-maps/intesis/inmbsdai001r000",
 "address_note": "address = 0-based Modbus wire (PDU) address; documented = as printed in the source.",
 "note": "Re-typed from the manufacturer's public documentation (see source) and verified against it. Registers vary by firmware and options; verify against the live device before writing."
}