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Unit ventilator controller (classroom terminal unit) · BACnet points list
Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller BACnet points list
Updated 6 November 2026
The MicroTech II unit ventilator controller talks BACnet MS/TP through an optional communication module (LonWorks and N2 Open are the other options). The list has 54 objects: occupied/standby/unoccupied setpoints, damper and economizer settings, occupancy, mode and emergency commands, enables for economizer, compressor and auxiliary heat, sensor values the BAS can override, and status, run-time and fault values. Which objects apply depends on the unit's software model.
This page lists 54 BACnet objects for the Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller — 36 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Daikin Applied’s own free documentation, linked below.
- Manufacturer
- Daikin Applied
- Model
- MicroTech II AAF-HermanNelson Unit Ventilator Controller
- Equipment
- Unit ventilator controller (classroom terminal unit)
- Equipment type
- VAV boxes & fan coils
- BACnet objects
- 54 (36 writable)
- Transport
- BACnet MS/TP
- Firmware
- BACnet module firmware 3.00 and higher (state numbers)
- Also known as
- ED 15065, AAF-HermanNelson, HermanNelson unit ventilator, MicroTech II UV, UVC, MTII UVUC
Reference only, provided as-is: verify against Daikin Applied’s current documentation and the live device before use. Not official Daikin Applied information. Terms of use.
BMS integration notes: Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller
Set the MS/TP MAC address on the module's S1 switch, give each controller a unique device instance, then schedule the unit with Occupancy Sensor Input (MO 9) and leave Application Mode on Auto. Write the occupied setpoints only when they change, and read occupancy, controller state, space temperature and the fault value.
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| MO 9 | Occupancy Sensor Input | Occupancy command from the BAS | Write |
| MO 2 | ApplicMode | Unit mode; leave on Auto or Null normally | Write |
| MO 3 | EmergOverride | Emergency state command (5 = shutdown) | Write |
| AV 1 | OccupiedCool | Occupied cooling setpoint | Write |
| AV 4 | OccupiedHeat | Occupied heating setpoint | Write |
| MO 5 | ResetAlarm | Reset manual alarms | Write |
| MI 3 | EffectOccup | Current occupancy | Read |
| AI 11 | StateMachine | Controller state code | Read |
| AI 1 | SpaceTemp | Space temperature | Write |
| AI 17 | InAlarm | Current fault number | Read |
Enable & remote start
Occupancy Sensor Input (MO 9) is the object to use for BAS occupancy scheduling; the local bypass button overrides it for the Local Bypass Time (AV 7). Occupancy Override Input (MO 1) has the highest priority and overrides the sensor and tenant override. Application Mode (MO 2) should stay Auto or Null for normal operation.
Sensors & values from the BMS
Space temperature, outdoor temperature, outdoor and space humidity, space CO2 and entering water temperature (AI 1-5, AI 18) can be written by the BAS after setting Out_Of_Service TRUE; a valid value overrides the local sensor.
Network setup
- MS/TP MAC address 0-127 is set with switches 1-7 of S1 on the communication module; switch 8 stays OFF (master).
- Device instance comes from the last four digits of the board serial number; change it from the BAS if it clashes.
- Device name is MTII UVUC plus the 10-digit board serial number.
- Some software models need extra settings changed with MicroTech II Service Tools (Table 11 of the guide).
Watch out for
- All analog values are stored in EEPROM; don't write setpoints cyclically.
- Use MO 9, not MO 1, for scheduled occupancy.
- State numbers changed with module firmware 3.00 (August 2003); older modules use 0-based values.
Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AVmin | 1 | OccupiedCool | Occupied cooling setpoint, 61-86 °F | °F | Write | |
| AV | 2 | StandbyCool | Standby cooling setpoint, 61-86 °F | °F | Write | |
| AV | 3 | UnoccupiedCool | Unoccupied cooling setpoint, 61-86 °F | °F | Write | |
| AVmin | 4 | OccupiedHeat | Occupied heating setpoint, 50-82 °F | °F | Write | |
| AV | 5 | StandbyHeat | Standby heating setpoint, 50-82 °F | °F | Write | |
| AV | 6 | UnoccupiedHeat | Unoccupied heating setpoint, 50-82 °F | °F | Write | |
| AV | 7 | BypassTime | Time the unit stays in bypass, 0-240 min | min | Write | |
| AV | 8 | OAMinPos | Outside air damper minimum position at high fan speed | % | Write | |
| AV | 9 | OAMinPosMedSpeed | Outside air damper minimum position at medium fan speed | % | Write | |
| AV | 10 | OAMinPosLowSpeed | Outside air damper minimum position at low fan speed | % | Write | |
| AV | 11 | SpaceCO2Lim | Space CO2 maximum limit | ppm | Write | |
| AV | 12 | Economizer OA Temp Setpoint | Outdoor temperature below which economizing is allowed | °F | Write | |
| AV | 13 | EconDBDiff | Indoor/outdoor air temperature differential for economizer | °F | Write | |
| AV | 14 | OAEnthSept | Outdoor air enthalpy setpoint for economizer | Btu/lb | Write | |
| AV | 15 | EconEnthDiff | Indoor/outdoor air enthalpy differential for economizer | Btu/lb | Write | |
| AV | 16 | SpaceRHSetpt | Space humidity setpoint | % | Write | |
| AV | 17 | UVAppVersion | Application software revision | Write | ||
| AO | 1 | SetptOffset | Shifts occupied heating and cooling setpoints, -18 to +18 °F | °F | Write | |
| MO | 1 | OccManCmd | Highest-priority occupancy override (overrides sensor and tenant override) | Write | 1=Occupied, 2=Unoccupied, 3=Bypass, 4=Standby, 5=Null | |
| MOmin | 2 | ApplicMode | Unit mode command; Auto or Null for normal operation | Write | 1=Auto, 2=Heat, 4=Cool, 5=Night Purge, 7=Off, 9=Emergency Heat, 10=Fan Only, 15=Null | |
| MOmin | 3 | EmergOverride | Emergency state command | Write | 1=Normal, 2=Pressurized, 3=Depressurized, 4=Purge, 5=Shutdown, 6=Fire, 7=Null | |
| MO | 4 | ResetFilter | Reset the filter alarm | Write | 1=Reset Object, 2=Clear, 3=Null | |
| MOmin | 5 | ResetAlarm | Reset manual alarms | Write | 1=Reset Object, 2=Clear, 3=Null | |
| MO | 6 | EconEnable | Enable or disable the economizer | Write | 1=Disable, 2=Enable, 3=Null | |
| MO | 8 | AuxHeatEnable | Enable or disable auxiliary heat | Write | 1=Off, 2=On, 3=Null | |
| MOmin | 9 | Occupancy Sensor Input | Occupancy command from the BAS (use this for scheduling) | Write | 1=Occupied, 2=Unoccupied, 5=Null | |
| MI | 1 | FanSpeed | Current fan speed | Read | 1=Off, 3=Low Speed, 4=Medium Speed, 5=High Speed, 6=Null | |
| MI | 2 | HeatCool | Current controller mode (writable only when out of service) | Write | 1=Auto, 2=Heat, 4=Cool, 5=Night Purge, 7=Off, 9=Emergency Heat, 10=Fan Only, 15=Null | |
| MImin | 3 | EffectOccup | Current occupancy | Read | 1=Occupied, 2=Unoccupied, 3=Bypass, 4=Standby, 5=Null | |
| MI | 4 | EnergyHoldOff | Stops heating and cooling, keeps freeze/overheat protection | Write | 1=Disable, 2=Enable, 3=Null | |
| AImin | 1 | SpaceTemp | Space temperature; write (out of service) to override the sensor | °F | Write | |
| AI | 2 | OutdoorTemp | Outdoor air temperature; writable when out of service | °F | Write | |
| AI | 3 | OutdoorRH | Outdoor air humidity; writable when out of service | % | Write | |
| AI | 4 | Space Humidity Input | Space humidity; writable when out of service | % | Write | |
| AI | 5 | SpaceCO2 | Space CO2; writable when out of service | ppm | Write | |
| AI | 6 | DischAirTemp | Discharge air temperature | °F | Read | |
| AI | 7 | EffectSetpt | Active heating or cooling setpoint | °F | Read | |
| AI | 8 | LocalSetpt | Setpoint adjustment from the local room sensor | °F | Write | |
| AI | 9 | DATSetpt | Calculated discharge air setpoint | °F | Read | |
| AI | 10 | OADamper | Outside air damper position | % | Read | |
| MO | 7 | ComprEnable | Enable or disable compressor operation | Write | 1=Off, 2=On, 3=Null | |
| AImin | 11 | StateMachine | Unit ventilator controller state | Read | 49=Econ_Mech, 50=Mech_Cool, 51=Econ, 52=DA Heat, 53=Heat, 54=DeHumid, 55=Full_Heat, 56=Night_Purge, 57=Off, 65=Fan_Only, 66=(Heat)Can't Heat, 67=Can't Cool, 68=(Emergency Heat) Can't Heat, 69=Heat Low Limit, 70=Cool Low Limit | |
| AI | 12 | FanRunTime | Space fan run time | h | Read | |
| AI | 13 | BinaryOut1 | Bit-coded status of binary outputs 1-7 | Read | ||
| AI | 14 | BinaryOut2 | Bit-coded status of outputs 8-9 and expansion outputs 1-2 | Read | ||
| AI | 15 | BinaryOut3 | Bit-coded status of expansion outputs 6-8 | Read | ||
| AI | 16 | BinaryIn1 | Bit-coded status of binary inputs 1, 3-6, 12 | Read | ||
| AImin | 17 | InAlarm | Current fault number | Read | 1=Space T. Sens. Fail, 2=DX Press Fault, 3=Comp. Env. Fault, 4=Dis Air DX LowLimit, 5=Cond. Overflow, 6=Space Coil DX T. Sens., 7=Outdoor T. Sens, 8=Dis Air Temp Sens., 9=Outdoor Coil DX T.Sensor or Water Coil DX T. Sens, 10=Water-out T. Sensor Source or Water T. Sens, 11=Space RH Sens, 12=Outdoor RH Sens., 13=Space CO2 Sens., 14=Source Water Inadequate, 15=Freeze Stat, 16=Change Filter | |
| AI | 18 | SourceTemp | Entering (source) water temperature; writable when out of service | °F | Write | |
| AI | 19 | WaterOutTemp | Leaving water temperature | °F | Read | |
| AI | 20 | ComprRunTime | Compressor run time | h | Read | |
| AI | 21 | FBPDamper | Face and bypass damper position | % | Read | |
| AI | 22 | HotWater | Heating or CW/HW valve position (modulating valve) | % | Read | |
| AI | 23 | ColdWater | Chilled water valve position (modulating valve) | % | Read |
No points match these filters.
Object ID lookup: Daikin Applied MicroTech II unit ventilator point IDs by name
AV1OccupiedCoolAV2StandbyCoolAV3UnoccupiedCoolAV4OccupiedHeatAV5StandbyHeatAV6UnoccupiedHeatAV7BypassTimeAV8OAMinPosAV9OAMinPosMedSpeedAV10OAMinPosLowSpeedAV11SpaceCO2LimAV12Economizer OA Temp SetpointAV13EconDBDiffAV14OAEnthSeptAV15EconEnthDiffAV16SpaceRHSetptAV17UVAppVersionAO1SetptOffsetMO1OccManCmdMO2ApplicModeMO3EmergOverrideMO4ResetFilterMO5ResetAlarmMO6EconEnableMO8AuxHeatEnableMO9Occupancy Sensor InputMI1FanSpeedMI2HeatCoolMI3EffectOccupMI4EnergyHoldOffAI1SpaceTempAI2OutdoorTempAI3OutdoorRHAI4Space Humidity InputAI5SpaceCO2AI6DischAirTempAI7EffectSetptAI8LocalSetptAI9DATSetptAI10OADamperMO7ComprEnableAI11StateMachineAI12FanRunTimeAI13BinaryOut1AI14BinaryOut2AI15BinaryOut3AI16BinaryIn1AI17InAlarmAI18SourceTempAI19WaterOutTempAI20ComprRunTimeAI21FBPDamperAI22HotWaterAI23ColdWater
Integration notes
- Object names are the names in the guide's full references (MTII UVUC ##########.<name>). Three are not usable as printed and keep the table's point name: MO 9 (its reference repeats MI 3's EffectOccup), AI 4 (repeats AI 5's SpaceCO2) and AV 12 (no reference printed).
- Multistate state numbers are the firmware 3.00+ values (after 08/01/2003); firmware 2.08/2.09 used 0-based numbers with 255 = Null.
- Table 16 of the guide marks which objects exist for each software model 00-18 (e.g. compressor objects only on heat pump/DX models, valve and F&BP damper objects only on hydronic models).
- AI 1-5 and AI 18 accept writes only after Out_Of_Service is set TRUE; a valid written value overrides the local sensor.
- AI 11 and AI 17 carry enumerated values (controller state and fault number) although they are analog inputs.
- The device instance is set at the factory from the last four digits of the board serial number.
- The table lists the source water temperature as AI 18; its detail page shows it as an Analog Output.
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the MicroTech II AAF-HermanNelson Unit Ventilator Controller and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller
How many BACnet points does the Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller have?
This list has 54 BACnet objects: 23 analog inputs, 1 analog output, 17 analog values, 4 multi-state inputs, 9 multi-state outputs. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller BACnet points are writable?
36 of the 54 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.
Where is the official Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller BACnet documentation?
The source is MicroTech II AAF-HermanNelson Unit Ventilator Unit Controller Protocol Information (BACnet, LonWorks, N2 Open) (ED 15065-5), revision 2007-08, published free by Daikin Applied at https://tahoeweb.daikinapplied.com/api/general/DownloadDocumentByName/media/ED15065-5.pdf.
What are the minimum BACnet points to integrate the Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller?
Start with MO 9 Occupancy Sensor Input (Occupancy command from the BAS); MO 2 ApplicMode (Unit mode; leave on Auto or Null normally); MO 3 EmergOverride (Emergency state command (5 = shutdown)); AV 1 OccupiedCool (Occupied cooling setpoint); AV 4 OccupiedHeat (Occupied heating setpoint); MO 5 ResetAlarm (Reset manual alarms); MI 3 EffectOccup (Current occupancy); AI 11 StateMachine (Controller state code); AI 1 SpaceTemp (Space temperature); AI 17 InAlarm (Current fault number).
How do I enable BMS control of the Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller?
Occupancy Sensor Input (MO 9) is the object to use for BAS occupancy scheduling; the local bypass button overrides it for the Local Bypass Time (AV 7). Occupancy Override Input (MO 1) has the highest priority and overrides the sensor and tenant override. Application Mode (MO 2) should stay Auto or Null for normal operation.
Can the BMS supply sensor values to the Daikin Applied MicroTech II AAF-HermanNelson Unit Ventilator Controller?
Space temperature, outdoor temperature, outdoor and space humidity, space CO2 and entering water temperature (AI 1-5, AI 18) can be written by the BAS after setting Out_Of_Service TRUE; a valid value overrides the local sensor.
How do I check these points on the real MicroTech II AAF-HermanNelson Unit Ventilator Controller?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
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Daikin McQuay SWP self-contained and SWT modular self-contained air conditioning units with the MicroTech II controller (application 1.28), DAC or SCC control.
Also known as: ED 15061, SWP, SWT, MicroTech II self-contained, MTII SCUC, McQuay self-contained - Rooftop unit / AHU controller
Daikin Applied MicroTech III Applied Rooftop and Self-Contained Unit Controller
Rebel (DPS/DPH), Maverick (MPS), RoofPak rooftops and air handlers (RPS, RDT, RFS, RDS, RAH, RPE, RDE) and SWP/SWT self-contained units.
Also known as: MicroTech III AHU, RoofPak, Rebel DPS, Maverick MPS, RPS, RDT, RFS, RDS, RAH, RPE, RDE, SWP, SWT, ED 15112 - Fan coil unit controller
Daikin Applied MicroTech III Fan Coil Unit Controller
Daikin Applied fan coil units with the MicroTech III unit controller and the plug-in BACnet MS/TP communication module.
Also known as: MicroTech III FCU, MTIIIUC_FCU, Applied Terminal Systems fan coil, ED 15135 - Generic I/O controller
Daikin Applied MicroTech III Generic I/O Panel
Daikin MicroTech III Generic I/O Panel used in the Daikin Delivered VAV System (software 2508022100 and later).
Also known as: ED 19014, Generic I/O Panel, MicroTech III GIO, POL904 - Water source heat pump controller
Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage
Enfinity single-stage compressor water source heat pumps (MHC/MHW, CCH/CCW, VFC/VFW, LVC/LVW, VHC/VHF).
Also known as: Enfinity, MHC, MHW, CCH, CCW, VFC, VFW, LVC, LVW, VHC, VHF, MicroTech III water source heat pump, ED 15103 - Water source heat pump controller
Daikin Applied MicroTech III WSHP Controller - SmartSource / Enfinity Large Two Compressor
SmartSource single and two-stage (GSH/GSV, GTH/GTV, GCV/GCH) and Enfinity Large two-compressor (CCH/CCW, LVC/LVW) heat pumps.
Also known as: SmartSource, GSH, GSV, GTH, GTV, GCV, GCH, Enfinity Large, CCH, CCW, LVC, LVW, ED 15103 - Water source heat pump controller
Daikin Applied MicroTech MT2300 WSHP Controller - SmartSource R32 (SCH/SDH, SMH/SNH, SSH/STH)
Daikin SmartSource single/two-stage and two-compressor water source heat pumps with R32 refrigerant and the MicroTech MT2300 controller (models SCH/SDH, SMH/SNH, SSH/STH).
Also known as: MT2300, SmartSource Series2, SmartSource SS2C, SCH, SDH, SMH, SNH, SSH, STH, ED 19129 - Air handler unit controller
Daikin Applied MicroTech PreciseLine Light Air Handler Controller
PreciseLine light commercial air handlers (BCV, BCA, BCH; 600-10,000 CFM) with the MicroTech 4 Lite controller, including R-410A D-Kit and R-32 EV-kit VRV units.
Also known as: PreciseLine, MicroTech 4 Lite, MT4 Lite AHU, PL AHU, BCV, BCA, BCH, ED 19126 - Unit ventilator controller (classroom air handler)
Daikin Applied MicroTech Unit Ventilator Controller
Daikin Applied unit ventilators with the MicroTech UV unit controller and its on-board BACnet MS/TP port.
Also known as: MicroTech UV, MTUC_UV, Daikin unit ventilator, ED 19110 - EC fan array controller (air handler)
Daikin Applied MicroTech Vision / Skyline EC Fan Array Controller
Vision (CAH/CAC) and Skyline (OAH/OAC) air handlers with an EC fan array on the MicroTech 4 fan controller (Premium controls option), up to 20 fans.
Also known as: Vision, Skyline, MT4_DFA_EC, MT4_DFA, CAH, CAC, OAH, OAC, EC fan array, ED 19122 - Air handling unit controller
Daikin Applied Modular Light (ALB) air handler, EvoLVE controls (Daikin Applied Europe)
Daikin Applied Europe Modular Light (ALB) compact air handling units with the MicroTech controller and EvoLVE / Airstream control software.
Also known as: Modular Light, ALB, Daikin Modular Light AHU, EvoLVE, Airstream, D-EIGOC00106-26_00 - Air handling unit controller
Daikin Applied Modular T (ATB) air handler, MODULAR T software (Daikin Applied Europe)
Daikin Applied Europe Modular T (ATB) air handling units with the MODULAR T controller software.
Also known as: Modular T, ATB, MOD T, Daikin Modular T AHU, D-EIGOC0110-23-00EN
Source: MicroTech II AAF-HermanNelson Unit Ventilator Unit Controller Protocol Information (BACnet, LonWorks, N2 Open) · ED 15065-5 · rev. 2007-08. Object names, instances and units are reproduced as published; descriptions are our own.