Easy BACnet- Home
- BACnet points lists
- Belimo
- 2-way EPIV V4
Pressure-independent control valve · BACnet points list
Belimo 2-way EPIV V4 BACnet points list
Updated 28 October 2026
The 2-way EPIV is a characterized control valve with a built-in ultrasonic flow sensor that holds flow regardless of system pressure. Over BACnet it takes a relative setpoint on AO 1 that means either position or flow, and reports position, flow, accumulated volume, flow-body temperature, glycol content and status. The document lists BACnet MS/TP and BACnet IP settings.
This page lists 36 BACnet objects for the Belimo 2-way EPIV V4 — 15 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
- 2-way EPIV V4
- Equipment
- Pressure-independent control valve
- Equipment type
- Valves & actuators
- BACnet objects
- 36 (15 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Application EPIV 4.2
- Default device instance
- 1
- Also known as
- EPIV, EP..R2+BAC, EP..R2+KBAC, Electronic Pressure Independent Valve, 2-way EPIV DN 15-50
BMS integration notes: Belimo 2-way EPIV V4
Write MV 122 SpSource to Bus, pick position or flow control in MV 100, set the flow limits, then command AO 1 SpRel. Monitor AV 19 flow and AI 1 position, and use the MV 103-106 status objects and AV 140 ErrorState for alarms. If a bus fail action is set, keep rewriting AO 1 or MV 1 within 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 | Position or flow setpoint from the BMS | Command |
| MV 122 | SpSource | Must be Bus for AO 1 to take effect | Write |
| AV 19 | AbsFlow_UnitSel | Measured flow | Read |
| AI 1 | RelPos | Valve position feedback | Read |
| AV 140 | ErrorState | Bit-coded fault and warning flags | Read |
Enable & remote start
Write MV 122 SpSource = 2 (Bus); otherwise the valve follows the 0.5-10 V signal on wire 3 and AO 1 is overridden.
Heartbeat & communication loss
AV 130 BusWatchdog sets 5-3600 s (default 120 s). If neither AO 1 nor MV 1 is rewritten within that time, the valve moves to the MV 130 BusFailAction (default None; options Open, Close, Max, Min, Stop) and sets bit 15 in AV 140.
Network setup
- Default device instance 1.
- MS/TP: baud 9600-115200, default 38400; MAC address 0-127, default 1; max 32 nodes without repeater.
- BACnet IP: UDP port configurable, default 47808.
- Configure with Belimo Assistant 2; bus termination is set there and shown in BV 99.
Watch out for
- Writable objects with instance 90 and above are persistent; do not write them cyclically.
- Changing MV 100 ControlMode resets the valve.
- Vmax below 25% of nominal flow is raised to 25%.
- Max 5 active COV subscriptions.
Belimo 2-way EPIV 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 | |||||
|---|---|---|---|---|---|---|
| AOmin | 1 | SpRel | Relative setpoint: position or flow | % | Command | |
| AI | 6 | SpAnalog | Analog setpoint when setpoint source is analog | % | Read | |
| AImin | 1 | RelPos | Relative valve position | % | Read | |
| AV | 2 | AbsPos | Absolute valve position | ° | Read | |
| MVmin | 122 | SpSource | Setpoint source: analog wire 3 or bus AO 1 | Write | 1=Analog, 2=Bus | |
| MV | 100 | ControlMode | How the setpoint is interpreted | Write | 1=Position Control, 2=Flow Control | |
| MV | 1 | Override | Override control of the setpoint | Write | 1=None, 2=Open valve, 3=Close valve, 4=Minimum, 5=–, 6=Maximum, 7=Nominal, 8=–, 9=–, 10=–, 11=Motor Stop | |
| MV | 120 | Command | Start service/test function; returns to None | Write | 1=None, 2=–, 3=Synchronization | |
| MV | 130 | BusFailAction | Action when bus watchdog expires | Write | 1=None, 2=Open, 3=Close, 4=Max, 5=Min, 6=–, 7=Stop | |
| AV | 130 | BusWatchdog | Bus watchdog timeout (5-3600, default 120) | s | Write | |
| BV | 99 | BusTermination | 120 Ω bus termination enabled | Read | 0=Disabled, 1=Enabled | |
| MV | 106 | StatusActuator | Actuator status | Read | 1=OK, 2=Actuator cannot move, 3=Gear train disengaged, 4=No communication to actuator | |
| AV | 17 | SpAbsFlow_UnitSel | Active absolute flow setpoint | m³/s, m³/h, l/s, l/min, l/h, gpm or cfm (MV 123) | Read | |
| AV | 10 | RelFlow | Flow relative to maximum flow limit | % | 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 | 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 | |
| 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 | |
| AV | 52 | Volume_UnitSel | Accumulated volume | m³, l, gal or cf (MV 126) | Read | |
| PIV | 50 | VolumePIV_UnitSel | Accumulated volume as integer | MV 126 unit | Read | |
| MV | 126 | UnitSelVolume | Engineering unit for volume objects | Write | 1=m³, 2=Litre, 3=Gallon, 4=Cubic foot | |
| MV | 103 | StatusSensor | Flow and temperature sensor status | Read | 1=OK, 2=Flow measurement error, 3=Flowbody temperature not OK, 4=–, 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 | |
| AV | 60 | GlycolConcentration | Glycol concentration | % | Read | |
| PIV | 201 | MeterSerialNo_Part1 | Flow meter serial number, first digits | Read | ||
| PIV | 202 | MeterSerialNo_Part2 | Flow meter serial number, last digits | Read | ||
| AI | 23 | T_UnitSel | Flow body temperature | °C, K or °F (MV 127) | Read | |
| AI | 20 | Sens1Active_Volt | Sensor 1 input as voltage (active sensor) | V | Read | |
| BI | 20 | Sens1Switch | Sensor 1 as switch input | Read | 0=Inactive, 1=Active | |
| MV | 127 | UnitSelTemperature | Engineering unit for temperature | Write | 1=°C, 2=K, 3=°F | |
| MV | 220 | Sens1Type | Sensor 1 input type (bus setpoint only) | Write | 1=None, 2=Active volt, 3=–, 4=–, 5=Switch | |
| 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, 9=Flowbody temperature error, 10=Communication to sensor interrupted, 11=Freeze warning, 12=Glycol detected, 15=Bus watchdog triggered |
No points match these filters.
Integration notes
- The document prints access as R / W; those objects are listed here as writable (W).
- Flow and volume units follow MV 123 and MV 126; temperature unit follows MV 127.
- Sensor 1 objects (AI 20, BI 20) are out of service unless MV 220 selects the matching sensor type.
- Data can take up to 190 s to initialise after power-up; values read 0 until then.
- Value ranges depend on valve size (DN); see the product datasheet.
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 2-way EPIV 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 2-way EPIV V4
How many BACnet points does the Belimo 2-way EPIV V4 have?
This list has 36 BACnet objects: 4 analog inputs, 1 analog output, 13 analog values, 1 binary input, 1 binary value, 13 multi-state values, 3 positive integer values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Belimo 2-way EPIV V4 BACnet points are writable?
15 of the 36 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 2-way EPIV V4 BACnet documentation?
The source is BACnet Interface Description, 2-way EPIV, DN 15…50 (Version 4.2), revision 2025-09 / V4.2, published free by Belimo at https://www.belimo.com/mam/general-documents/system_integration/BACnet/belimo_BACnet_Interface-description_2way-EPIV_V4_2_en-gb.pdf.
What are the minimum BACnet points to integrate the Belimo 2-way EPIV V4?
Start with AO 1 SpRel (Position or flow setpoint from the BMS); MV 122 SpSource (Must be Bus for AO 1 to take effect); AV 19 AbsFlow_UnitSel (Measured flow); AI 1 RelPos (Valve position feedback); AV 140 ErrorState (Bit-coded fault and warning flags).
How do I enable BMS control of the Belimo 2-way EPIV V4?
Write MV 122 SpSource = 2 (Bus); otherwise the valve follows the 0.5-10 V signal on wire 3 and AO 1 is overridden.
Does the Belimo 2-way EPIV V4 need a BACnet heartbeat or have a communication timeout?
AV 130 BusWatchdog sets 5-3600 s (default 120 s). If neither AO 1 nor MV 1 is rewritten within that time, the valve moves to the MV 130 BusFailAction (default None; options Open, Close, Max, Min, Stop) and sets bit 15 in AV 140.
How do I check these points on the real 2-way EPIV 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
- 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 - Pressure-independent control valve with energy meter
Belimo Energy Valve V4
Belimo Energy Valve version 4, DN 15 to 50, BACnet models EV..R2+(K)BAC, EV..R2+MID and EV..R3+BAC.
Also known as: Energy Valve, EV..R2+BAC, EV..R2+KBAC, EV..R2+MID, EV..R3+BAC, Belimo Energy Valve 4 - 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, 2-way EPIV, DN 15…50 (Version 4.2) · rev. 2025-09 / V4.2. Object names, instances and units are reproduced as published; descriptions are our own.