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Pressure-independent control valve with energy meter · BACnet points list
Belimo Energy Valve V4 BACnet points list
Updated 28 October 2026
The Energy Valve V4 is a pressure-independent characterized control valve with an ultrasonic flow sensor and two temperature sensors, so it reports flow, delta T, power and heating/cooling energy. It speaks BACnet MS/TP and BACnet IP (including foreign-device registration). The setpoint on AO 1 means position, flow, power or differential pressure depending on the control mode in MV 100, and the engineering units of most analog objects follow selectable unit objects.
This page lists 68 BACnet objects for the Belimo Energy Valve V4 — 27 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Belimo’s own free documentation, linked below.
- Manufacturer
- Belimo
- Model
- Energy Valve V4
- Equipment
- Pressure-independent control valve with energy meter
- Equipment type
- Valves & actuators
- BACnet objects
- 68 (27 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Application 04.01.0000, firmware 14.10.0002 (interface description V4.2.0)
- Default device instance
- 1
- Also known as
- Energy Valve, EV..R2+BAC, EV..R2+KBAC, EV..R2+MID, EV..R3+BAC, Belimo Energy Valve 4
BMS integration notes: Belimo Energy Valve V4
Set MV 122 SpSource to Bus, choose the control mode in MV 100 and the flow and power limits, then command AO 1 SpRel from the BMS. Read flow, temperatures, delta T, power and energy for monitoring, and watch MV 99 SummaryStatus and AV 140 ErrorState for faults. If you enable a bus fail action, the BMS must keep rewriting the setpoint inside the watchdog time.
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 |
|---|---|---|---|
| AO 1 | SpRel | Setpoint: position, flow, power or dp per control mode | Command |
| MV 122 | SpSource | Must be Bus for AO 1 to take effect | Write |
| AV 19 | AbsFlow_UnitSel | Measured flow | Read |
| AV 22 | DeltaT_UnitSel | Coil delta T | Read |
| AV 46 | HeatingPower_UnitSel | Heating power delivered; units set by MV 124 | Read |
| AV 45 | CoolingPower_UnitSel | Cooling power delivered; units set by MV 124 | Read |
| AV 47 | CoolingEnergy_UnitSel | Cooling energy meter | Read |
| AV 48 | HeatingEnergy_UnitSel | Heating energy meter | Read |
| MV 99 | SummaryStatus | Overall OK / warning / not OK | Read |
| AV 140 | ErrorState | Bit-coded fault and warning flags | Read |
Enable & remote start
Write MV 122 SpSource = 2 (Bus) so the valve follows AO 1 SpRel instead of the 0-10 V signal on wire 3. MV 1 Override can force open, close, min, max, nominal or motor stop.
Heartbeat & communication loss
AV 130 BusWatchdog sets a timeout of 5-3600 s (default 120 s). If no write arrives within that time, the valve runs the action in MV 130 BusFailAction (default None; options Open, Close, Max, Min, Stop) and sets the bus watchdog bit in AV 140. With a fail action set, the BMS must keep rewriting the setpoint.
Network setup
- Default device instance 1; on MS/TP the device ID is this value plus the MAC address.
- MS/TP: baud 9600-115200, default 38400; MAC address 0-127, default 1; max 32 nodes per segment without repeater.
- BACnet IP: UDP port configurable, default 47808; foreign-device registration supported.
- Configure with Belimo Assistant 2 or the valve's built-in web server.
- Bus termination (120 Ω) is set with Belimo Assistant 2; BV 99 shows its state.
Watch out for
- Writable objects with instance 90 and above are stored persistently; do not write them on a regular schedule.
- Changing MV 100 ControlMode resets the valve.
- Engineering units change when the unit-select MVs are written; recheck BMS scaling after any change.
- Vmax below 25% of nominal flow is raised to 25%.
- Avoid switching MV 200 between certified and lifetime registers, it breaks energy trending.
- Max 6 active COV subscriptions.
Belimo Energy Valve V4 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 | |||||
|---|---|---|---|---|---|---|
| AI | 1 | RelPos | Relative valve position | % | Read | |
| AI | 6 | SpAnalog | Analog setpoint when setpoint source is analog | % | Read | |
| AI | 20 | Sens1Active_Volt | Sensor 1 input as voltage (active sensor) | V | Read | |
| AI | 21 | Sens1Passive_Ohm | Sensor 1 input as resistance (passive sensor) | Ω | Read | |
| AI | 22 | T1_UnitSel | Remote temperature T1 | °C, K or °F (MV 127) | Read | |
| AI | 23 | T2_UnitSel | Flow body temperature T2 | °C, K or °F (MV 127) | Read | |
| AOmin | 1 | SpRel | Relative setpoint: position, flow or power | % | Command | |
| AV | 2 | AbsPos | Absolute valve position | ° | Read | |
| AV | 10 | RelFlow | Flow relative to maximum flow limit | % | Read | |
| AV | 17 | SpAbsFlow_UnitSel | Active absolute flow setpoint | m³/s, m³/h, l/s, l/min, l/h, gpm or cfm (MV 123) | Read | |
| AVmin | 19 | AbsFlow_UnitSel | Measured absolute flow | m³/s, m³/h, l/s, l/min, l/h, gpm or cfm (MV 123) | Read | |
| AV | 20 | Sens1Temp_UnitSel | Sensor 1 as temperature (passive sensor) | °C, K or °F (MV 127) | Read | |
| AVmin | 22 | DeltaT_UnitSel | Delta T between T1 and T2 | °C, K or °F (MV 128) | Read | |
| AV | 40 | RelPower | Power relative to maximum power limit | % | Read | |
| AVmin | 45 | CoolingPower_UnitSel | Cooling power | W, kW, MW, BTU/h, kBTU/h or ton (MV 124) | Read | |
| AVmin | 46 | HeatingPower_UnitSel | Heating power | W, kW, MW, BTU/h, kBTU/h or ton (MV 124) | Read | |
| AVmin | 47 | CoolingEnergy_UnitSel | Cooling energy meter | J, kJ, MJ, GJ, Wh, kWh, MWh, BTU, kBTU or ton-h (MV 125) | Read | |
| AVmin | 48 | HeatingEnergy_UnitSel | Heating energy meter | J, kJ, MJ, GJ, Wh, kWh, MWh, BTU, kBTU or ton-h (MV 125) | Read | |
| AV | 52 | Volume_UnitSel | Accumulated volume | m³, l, gal or cf (MV 126) | Read | |
| AV | 55 | AbsDiffPressure | Measured differential water pressure | Pa, bar, psi, mbar or kPa (MV 131) | Read | |
| AV | 56 | RelDiffPressure | Differential pressure relative to max dp setpoint | % | Read | |
| AV | 60 | GlycolConcentration | Glycol concentration, measured or override value | % | Read | |
| AV | 90 | Vmin | Minimum flow limit | % | Write | |
| AV | 93 | Vmin_UnitSel | Minimum flow limit | m³/s, m³/h, l/s, l/min, l/h, gpm or cfm (MV 123) | Write | |
| AV | 94 | Vmax | Maximum flow limit (25-100% of nominal) | % | Write | |
| AV | 97 | Vmax_UnitSel | Maximum flow limit | m³/s, m³/h, l/s, l/min, l/h, gpm or cfm (MV 123) | Write | |
| AV | 100 | Vnom_UnitSel | Nominal flow of the valve | m³/s, m³/h, l/s, l/min, l/h, gpm or cfm (MV 123) | Read | |
| AV | 110 | Pmax | Maximum power limit | % | Write | |
| AV | 113 | Pmax_UnitSel | Maximum power limit | W, kW, MW, BTU/h, kBTU/h or ton (MV 124) | Write | |
| AV | 116 | Pnom_UnitSel | Nominal power | W, kW, MW, BTU/h, kBTU/h or ton (MV 124) | Read | |
| AV | 120 | SpDeltaT_UnitSel | Delta T setpoint for dT-Manager | °C, K or °F (MV 128) | Write | |
| AV | 127 | SpAbsFlowDeltaT_UnitSel | Flow setpoint at delta T | m³/s, m³/h, l/s, l/min, l/h, gpm or cfm (MV 123) | Write | |
| AV | 130 | BusWatchdog | Bus watchdog timeout (5-3600, default 120) | s | Write | |
| AV | 135 | AbsDiffPressure | Differential water pressure setpoint | Pa, bar, psi, mbar or kPa (MV 131) | Write | |
| AV | 136 | NomDiffPressure | Nominal differential pressure setpoint | Pa, bar, psi, mbar or kPa (MV 131) | Read | |
| AVmin | 140 | ErrorState | Bit-coded error and warning flags | Read | Bit 0=No communication to actuator, 1=Gear train disengaged, 2=Actuator cannot move, 3=Reverse flow, 4=Flow setpoint not reached, 5=Flow with closed valve, 6=Flow actual exceeds flow nominal, 7=Flow measurement error, 8=Remote temperature error, 9=Flowbody temperature error, 10=Communication to sensor interrupted, 11=Freeze warning, 12=Glycol detected, 13=Power setpoint not reached, 14=Device end of life reached, 15=Bus watchdog triggered, 16=No differential pressure detected, 17=Differential pressure setpoint can not be reached, 18=Minimum position applied | |
| BI | 20 | Sens1Switch | Sensor 1 as switch input | Read | 0=Inactive, 1=Active | |
| BV | 99 | BusTermination | 120 Ω bus termination enabled | Read | 0=Disabled, 1=Enabled | |
| MV | 1 | Override | Override control of the setpoint | Command | 1=None, 2=Open Valve, 3=Close Valve, 4=Minimum, 5=–, 6=Maximum, 7=Nominal, 8=–, 9=–, 10=–, 11=Motor stop | |
| MVmin | 99 | SummaryStatus | Summary of all status objects | Read | 1=OK, 2=Warning, 3=Not OK | |
| MV | 100 | ControlMode | How the setpoint is interpreted | Write | 1=Position control, 2=Flow control, 3=Power control, 4=Differential pressure control | |
| MV | 101 | DeltaT_Limitation | Delta T manager mode | Write | 1=Disabled, 2=dT-Manager, 3=dT-Manager scaling | |
| MV | 102 | StatusDeltaTMgr | Delta T manager status | Read | 1=Not selected, 2=Standby, 3=Active, 4=Scaling standby, 5=Scaling active | |
| MV | 103 | StatusSensor | Flow and temperature sensor status | Read | 1=OK, 2=Flow measurement error, 3=Flowbody temperature not OK, 4=Remote temperature not OK, 5=Communication to flow sensor interrupted | |
| MV | 104 | StatusFlow | Flow status | Read | 1=OK, 2=Actual flow exceeds nominal flow, 3=Flow with closed valve, 4=Flow setpoint cannot be reached, 5=Reverse flow | |
| MV | 105 | StatusMedia | Medium status | Read | 1=OK, 2=Glycol detected, 3=Freeze warning | |
| MV | 106 | StatusActuator | Actuator status | Read | 1=OK, 2=Actuator cannot move, 3=Gear train disengaged, 4=No communication to actuator | |
| MV | 107 | StatusPower | Power control status | Read | 1=OK, 2=Power not reached | |
| MV | 120 | Command | Start service/test function; returns to None | Write | 1=None, 2=–, 3=Synchronization | |
| MVmin | 122 | SpSource | Setpoint source: analog wire 3 or bus AO 1 | Write | 1=Analog, 2=Bus | |
| MV | 123 | UnitSelFlow | Engineering unit for flow objects | Write | 1=m³/s, 2=m³/h, 3=l/s, 4=l/min, 5=l/h, 6=gpm, 7=cfm | |
| MV | 124 | UnitSelPower | Engineering unit for power objects | Write | 1=W, 2=kW, 3=MW, 4=BTU/h, 5=kBTU/h, 6=ton | |
| MV | 125 | UnitSelEnergy | Engineering unit for energy objects | Write | 1=J, 2=kJ, 3=MJ, 4=GJ, 5=Wh, 6=kWh, 7=MWh, 8=BTU, 9=kBTU, 10=tonh | |
| MV | 126 | UnitSelVolume | Engineering unit for volume objects | Write | 1=m³, 2=Litre, 3=Gallon, 4=Cubic foot | |
| MV | 127 | UnitSelTemperature | Engineering unit for temperature sensors | Write | 1=°C, 2=K, 3=°F | |
| MV | 128 | UnitSelDeltaT | Engineering unit for delta T | Write | 1=°C, 2=K, 3=°F | |
| MV | 130 | BusFailAction | Action when bus watchdog expires | Write | 1=None, 2=Open, 3=Close, 4=Max, 5=Min, 6=–, 7=Stop | |
| MV | 131 | UnitSelPressureDifference | Engineering unit for differential pressure | Write | 1=Pa, 2=bar, 3=psi, 4=mbar, 5=kPa | |
| MV | 140 | DiffPressureSensorStatus | Differential pressure sensor status | Read | 1=OK, 2=Differential pressure not detected | |
| MV | 141 | DiffPressureControlStatus | Differential pressure control status | Read | 1=OK, 2=Differential pressure setpoint cannot be reached, 3=Minimum position applied | |
| MV | 200 | SelectMeterRegisters | Certified (MID) or lifetime meter register | Write | 1=Certified meter register, 2=Lifetime meter register | |
| MV | 220 | Sens1Type | Sensor 1 input type (bus setpoint only) | Write | 1=None, 2=Active volt, 3=–, 4=Passive, 5=Switch | |
| MV | 221 | Sens1TempType | Sensor 1 passive element type | Write | 1=None, 2=PT1000, 3=Ni1000EU, 4=–, 5=–, 6=–, 7=–, 8=NTC10k2, 9=NTC10k3 | |
| PIV | 31 | CoolingEnergyPIV_UnitSel | Cooling energy meter as integer | MV 125 unit | Read | |
| PIV | 32 | HeatingEnergyPIV_UnitSel | Heating energy meter as integer | MV 125 unit | Read | |
| PIV | 50 | VolumePIV_UnitSel | Accumulated volume as integer | MV 126 unit | Read | |
| PIV | 201 | MeterSerialNo_Part1 | Energy meter serial number, first digits | Read | ||
| PIV | 202 | MeterSerialNo_Part2 | Energy meter serial number, last digits | Read |
No points match these filters.
Integration notes
- Version 1-3 Energy Valves use a different object list; this file covers V4 only.
- Units of flow, power, energy, volume, temperature and pressure objects follow the unit-select MVs 123-131 and can change.
- MV 200 selects the certified (MID models only) or lifetime meter register for the energy and volume objects.
- Sensor 1 objects (AI 20/21, AV 20, BI 20) are out of service unless MV 220/221 select the matching sensor type.
- Differential pressure objects are used with the differential pressure control mode.
- AV 55 and AV 135 are both printed as AbsDiffPressure in the document; check the names read from the device.
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. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the Energy Valve V4 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 Belimo Energy Valve V4
How many BACnet points does the Belimo Energy Valve V4 have?
This list has 68 BACnet objects: 6 analog inputs, 1 analog output, 29 analog values, 1 binary input, 1 binary value, 25 multi-state values, 5 positive integer values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Belimo Energy Valve V4 BACnet points are writable?
27 of the 68 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 Belimo Energy Valve V4 BACnet documentation?
The source is BACnet Interface Description, Energy Valve DN 15...50 (Version 4), revision 2024-09 / V4.2.0, published free by Belimo at https://www.belimo.com/mam/general-documents/system_integration/BACnet/belimo_BACnet_Interface-description_Energy-Valve_V4_2_en-gb.pdf.
What are the minimum BACnet points to integrate the Belimo Energy Valve V4?
Start with AO 1 SpRel (Setpoint: position, flow, power or dp per control mode); MV 122 SpSource (Must be Bus for AO 1 to take effect); AV 19 AbsFlow_UnitSel (Measured flow); AV 22 DeltaT_UnitSel (Coil delta T); AV 46 HeatingPower_UnitSel (Heating power delivered; units set by MV 124); AV 45 CoolingPower_UnitSel (Cooling power delivered; units set by MV 124); AV 47 CoolingEnergy_UnitSel (Cooling energy meter); AV 48 HeatingEnergy_UnitSel (Heating energy meter); MV 99 SummaryStatus (Overall OK / warning / not OK); AV 140 ErrorState (Bit-coded fault and warning flags).
How do I enable BMS control of the Belimo Energy Valve V4?
Write MV 122 SpSource = 2 (Bus) so the valve follows AO 1 SpRel instead of the 0-10 V signal on wire 3. MV 1 Override can force open, close, min, max, nominal or motor stop.
Does the Belimo Energy Valve V4 need a BACnet heartbeat or have a communication timeout?
AV 130 BusWatchdog sets a timeout of 5-3600 s (default 120 s). If no write arrives within that time, the valve runs the action in MV 130 BusFailAction (default None; options Open, Close, Max, Min, Stop) and sets the bus watchdog bit in AV 140. With a fail action set, the BMS must keep rewriting the setpoint.
How do I check these points on the real Energy Valve V4?
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.
More Belimo BACnet points lists
- Pressure-independent control valve
Belimo 2-way EPIV V4
Belimo 2-way electronic pressure-independent valves (EPIV) version 4.2, DN 15 to 50, BACnet models EP..R2+(K)BAC.
Also known as: EPIV, EP..R2+BAC, EP..R2+KBAC, Electronic Pressure Independent Valve, 2-way EPIV DN 15-50 - Ultrasonic liquid flow sensor
Belimo 22PF Flow Sensor
Belimo 22PF-.. ultrasonic flow sensors for water and glycol pipes, interface version 4.3.0.
Also known as: 22PF, 22PF-.., Belimo ultrasonic flow sensor, Flow Sensor 22PF - 6-way pressure-independent control valve
Belimo 6-way EPIV
Belimo 6-way EPIV (EP..R-R6+BAC) used to switch and control a single coil between heating and cooling sequences.
Also known as: EP..R-R6+BAC, 6-way EPIV, 6-way characterised control valve, Belimo 6-way valve - Duct / outdoor sensors (temperature, humidity, CO2, VOC, differential pressure)
Belimo Duct and Pipe Sensors (22DTH, 22UTH, 22DTM, 22ADP) BACnet
Belimo BACnet MS/TP sensors: 22DTH duct temperature/humidity, 22UTH outdoor temperature/humidity, 22DTM duct CO2/VOC and 22ADP differential pressure/airflow sensors.
Also known as: 22DTH-..6.., 22UTH-..60X, 22DTM-..6, 22ADP-..6.., 22DTH-16M, 22DTH-56M, 22UTH-160X, 22UTH-560X, 22DTM-16, 22DTM-56, 22ADP-164, 22ADP-164L, 22ADP-56Q, 22ADP-56QB, 22ADP-564L, 22ADP-566L - Valve actuator (Ethernet, IoT)
Belimo IoT Valve Actuators VxM24A-LP1 / VxR24A-LP1 (BACnet IP)
Belimo IoT product range valve actuators VLM/VLR, VNM/VNR, VSM/VSR and VGM/VGR 24A-LP1 with Ethernet and BACnet IP.
Also known as: VLM24A-LP1, VLR24A-LP1, VNM24A-LP1, VNR24A-LP1, VSM24A-LP1, VSR24A-LP1, VGM24A-LP1, VGR24A-LP1, Belimo IoT Product Range - Butterfly valve actuator
Belimo PR..-BAC-.. Butterfly Valve Actuator (BACnet MS/TP)
Belimo PR rotary actuators for butterfly valves in the BACnet MS/TP version (PR..-BAC-..).
Also known as: PR..-BAC-.., Belimo PR actuator, PR BACnet - Room sensor / operating unit
Belimo Room Operating Unit 22RT-5U00
Belimo 22RT...-5U00... room operating units with virtual or ePaper touch display, measuring temperature, humidity and CO2.
Also known as: 22RT, 22RT…-5U00…, Room Operating Unit, ROU, 22RTM-5U00, Belimo room sensor BACnet - Thermal (BTU) energy meter
Belimo Thermal Energy Meter V4
Belimo Thermal Energy Meters version 4, DN 15 to 50 (22PE..-1U.., including MID-certified 22PEM models).
Also known as: TEM, Thermal Energy Meter, 22PE-1U, 22PEM-1UC, 22PE…-1U.., Belimo energy meter - VAV compact controller (actuator with flow sensor)
Belimo VAV-Compact
Belimo VAV-Compact volumetric flow controllers with the BACnet/Modbus interface (..MV-D3-MOD and ..HV24A-MOD).
Also known as: VAV-Compact MOD, ..MV-D3-MOD, ..HV24A-MOD, LMV-D3-MOD, NMV-D3-MOD, SMV-D3-MOD, LHV24A-MOD - VAV / CAV / pressure controller
Belimo VAV-Universal VRU
Belimo VAV-Universal controllers VRU-D3-BAC, VRU-M1-BAC and VRU-M1R-BAC used for VAV/CAV airflow, duct pressure and room pressure control.
Also known as: VAV-Universal, VRU-D3-BAC, VRU-M1-BAC, VRU-M1R-BAC, VRU-..-BAC
Source: BACnet Interface Description, Energy Valve DN 15...50 (Version 4) · rev. 2024-09 / V4.2.0. Object names, instances and units are reproduced as published; descriptions are our own.