{
 "manufacturer": "OJ Electronics",
 "manufacturer_slug": "oj-electronics",
 "model": "OJ-DC compressor drive",
 "model_slug": "oj-dc-compressor-drive",
 "aliases": [
  "OJ-DC",
  "OJ DC",
  "OJ Drives DC",
  "67958B"
 ],
 "equipment_type": "Compressor frequency drive",
 "applies_to": "OJ Electronics OJ-DC drives for compressors in air handling units, heat pumps and chillers.",
 "summary": "The OJ-DC compressor drive has BACnet MS/TP on its RS-485 terminals and RJ12 ports. Binary Values give run, alarm reset and alarm, warning and compressor-protection flags (lubrication, oil boost, minimum run time); Integer Values carry the speed setpoint, limits, ramps and running data. BACnet MS/TP has to be switched on first, through the OJ PC tool or Modbus.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": "AOC 1.00 or later",
 "default_device_instance": null,
 "access_inferred": false,
 "notes": [
  "Integer Value objects (IV) carry scaled whole numbers; values marked x0.01 have two implied decimals.",
  "BV 2 and BV 24-39 are not in the table.",
  "IV 18, 19 and 20 are all printed as \"Power Consumpt.\" and hold the Wh, kWh and MWh parts of the energy count.",
  "IV 8 RPMOut is printed with the unit Hz.",
  "Writing 0 to BV 4 turns BACnet MS/TP off; it comes back only through Modbus or protocol auto-detect."
 ],
 "source": {
  "title": "OJ DC BACnet MS/TP protocol (application note)",
  "doc_number": "67958B",
  "revision_date": "05/25",
  "url": "https://ojelectronics.com/drives/wp-admin/admin-ajax.php?action=productdownload&media_id=67464802&filename=67958B-05-25-OJ+DC-BACnet-MS-TP-protocol_GB+WEB.pdf&view=true"
 },
 "integration": {
  "summary": "Enable BACnet MS/TP on the drive, write the speed setpoint to IV 0 and set BV 0 to run the compressor. Read IV 7/IV 8 for output and speed and the BV alarm flags; BV 1 resets alarms.",
  "minimum_points": [
   {
    "ref": "BV 0",
    "name": "Motor on/off",
    "why": "Run command (1 = on); clears on any error"
   },
   {
    "ref": "IV 0",
    "name": "Setpoint / PrcSet",
    "why": "Speed setpoint, 0-10000 = 0-100.00 %"
   },
   {
    "ref": "BV 1",
    "name": "Reset Alarms",
    "why": "Alarm reset (1 = reset)"
   },
   {
    "ref": "IV 8",
    "name": "RPMOut",
    "why": "Compressor speed output, Hz"
   },
   {
    "ref": "IV 7",
    "name": "PrcOut",
    "why": "Output level, x0.01 %"
   },
   {
    "ref": "IV 12",
    "name": "Power In (filtered)",
    "why": "Input power, W"
   },
   {
    "ref": "BV 15",
    "name": "Internal Stop",
    "why": "Internal stop alarm"
   },
   {
    "ref": "BV 10",
    "name": "Rotor Blocked",
    "why": "Rotor blocked alarm"
   }
  ],
  "enable": "BACnet MS/TP must be enabled (OJ PC tool or Modbus coils); then BV 0 starts and stops the compressor.",
  "heartbeat": null,
  "remote_sensors": null,
  "setup": [
   "Out of the box the drive talks Modbus (address 70, 38400 baud, no parity, 1 stop bit); BACnet MS/TP is switched on from the OJ PC tool (Alternative device communications) or through Modbus coils.",
   "MS/TP settings: baud 9600-115200, MAC 0-127, Max Master 1-127, device instance 0-4194302 (Modbus holding registers).",
   "OJ publishes an EDE file for the object list on its product page."
  ],
  "gotchas": [
   "BV 0 drops back to 0 on any error, so the BMS has to set it again after the fault is cleared.",
   "Do not write BV 4 = 0: it turns BACnet MS/TP off until it is re-enabled through Modbus.",
   "BV 40-43 flag compressor protection cycles (lubrication, oil boost, minimum run, pressure relax) that can hold the speed."
  ]
 },
 "points": [
  {
   "type": "BV",
   "instance": 0,
   "name": "Motor on/off",
   "description": "Run command; drive clears it on any error",
   "units": "",
   "access": "W",
   "states": "0=Off, 1=On"
  },
  {
   "type": "BV",
   "instance": 1,
   "name": "Reset Alarms",
   "description": "Alarm reset; returns to 0 after the reset",
   "units": "",
   "access": "W",
   "states": "1=Reset"
  },
  {
   "type": "BV",
   "instance": 3,
   "name": "Motor output off",
   "description": "Keep motor output off",
   "units": "",
   "access": "W",
   "states": "1=Keep motor output off"
  },
  {
   "type": "BV",
   "instance": 4,
   "name": "Enable BACnet",
   "description": "0 = Modbus, 1 = BACnet",
   "units": "",
   "access": "W",
   "states": "0=Modbus 1=BACnet"
  },
  {
   "type": "BV",
   "instance": 5,
   "name": "V LO Alarm",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 6,
   "name": "V HI Alarm",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7,
   "name": "I HI Alarm (Motor out short)",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 8,
   "name": "Temperature High",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 9,
   "name": "Input Phase Error",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 10,
   "name": "Rotor Blocked",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 11,
   "name": "Current Limit",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 12,
   "name": "Voltage Limit",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 13,
   "name": "Rotor Direction",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 14,
   "name": "EEPROM Error",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 15,
   "name": "Internal Stop",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm (Stop)"
  },
  {
   "type": "BV",
   "instance": 16,
   "name": "Earth fault (H5 only)",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 23,
   "name": "STO Fault",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 17,
   "name": "Motor Phase Error",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 18,
   "name": "Communication error MOC",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 19,
   "name": "Ext. 24V supply overload",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Overload"
  },
  {
   "type": "BV",
   "instance": 20,
   "name": "MOC in bootloader",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 21,
   "name": "Communication error IOM",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning*"
  },
  {
   "type": "BV",
   "instance": 22,
   "name": "Motor Overheat (IOM)",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "BV",
   "instance": 40,
   "name": "Lubrication active",
   "description": "Lubrication cycle running",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 41,
   "name": "Oil boosting active",
   "description": "Oil boost running",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 42,
   "name": "Minimum run time active",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 43,
   "name": "Pressure relax time active",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Warning"
  },
  {
   "type": "BV",
   "instance": 44,
   "name": "Maximum oil boost ramp up time",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Alarm"
  },
  {
   "type": "IV",
   "instance": 0,
   "name": "Setpoint / PrcSet",
   "description": "Speed setpoint, 0-100.00 %; value x0.01",
   "units": "%",
   "access": "W",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 1,
   "name": "Min. RPM",
   "description": "",
   "units": "rpm",
   "access": "W",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 2,
   "name": "Max. RPM",
   "description": "",
   "units": "rpm",
   "access": "W",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 3,
   "name": "UpRampTime",
   "description": "",
   "units": "s",
   "access": "W",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 4,
   "name": "DownRampTime",
   "description": "",
   "units": "s",
   "access": "W",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 5,
   "name": "AOC SW version",
   "description": "value x0.01",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 6,
   "name": "MOC SW version",
   "description": "value x0.01",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 7,
   "name": "PrcOut",
   "description": "value x0.01",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 8,
   "name": "RPMOut",
   "description": "Compressor speed output",
   "units": "Hz",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 9,
   "name": "IGBT Temp",
   "description": "Power stage (IGBT) temperature; value x0.01",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 10,
   "name": "V In (RMS)",
   "description": "",
   "units": "V",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 11,
   "name": "I Out",
   "description": "",
   "units": "mA",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 12,
   "name": "Power In (filtered)",
   "description": "",
   "units": "W",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 13,
   "name": "Operation Minutes",
   "description": "",
   "units": "min",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 14,
   "name": "Operation Day",
   "description": "",
   "units": "days",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 15,
   "name": "ExternSet",
   "description": "",
   "units": "mV",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 16,
   "name": "V DC Bus (Peak)",
   "description": "",
   "units": "V",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 17,
   "name": "V Motor (Peak)",
   "description": "",
   "units": "V",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 18,
   "name": "Power Consumpt.",
   "description": "Energy, Wh part",
   "units": "Wh",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 19,
   "name": "Power Consumpt.",
   "description": "Energy, kWh part",
   "units": "kWh",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 20,
   "name": "Power Consumpt.",
   "description": "Energy, MWh part",
   "units": "MWh",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 21,
   "name": "BACnet SW version",
   "description": "value x0.01",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 22,
   "name": "Vin L1 - GND (RMS)",
   "description": "",
   "units": "V",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 23,
   "name": "Vin L2 - GND (RMS)",
   "description": "",
   "units": "V",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 24,
   "name": "Vin L3 - GND (RMS)",
   "description": "",
   "units": "V",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 25,
   "name": "Vibration_SUM_RMS",
   "description": "",
   "units": "2 mg",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 26,
   "name": "AOC Thermist.Temp",
   "description": "value x0.01",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "IV",
   "instance": 27,
   "name": "CurrentTimeLow1",
   "description": "",
   "units": "s",
   "access": "R",
   "states": ""
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/oj-electronics/oj-dc-compressor-drive",
 "note": "Provided as-is. Point availability varies by firmware and options; verify against the live device.",
 "disclaimer": "DISCLAIMER: reference only, provided AS IS with no warranty. May contain errors or be out of date. You must verify every point against the manufacturer's current documentation and the live device before use. easybacnet.com accepts no liability for its use and is not affiliated with the manufacturer. Terms: https://easybacnet.com/terms#content"
}