Easy BACnet- Home
- BACnet points lists
- ONICON
- System-10-BAC BTU Meter Network Interface
BTU (energy) meter · BACnet points list
ONICON System-10-BAC BTU Meter Network Interface BACnet points list
Updated 4 November 2026
The System-10-BAC interface puts an ONICON System-10 BTU meter on BACnet MS/TP or BACnet IP. It exposes energy and flow rate, supply and return temperatures, energy and volume totals, an auxiliary pulse total and the operating mode, plus BVs that zero each total. The meter runs in single, dual or bi-directional mode, which decides which totals carry data.
This page lists 17 BACnet objects for the ONICON System-10-BAC BTU Meter Network Interface — 5 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from ONICON’s own free documentation, linked below.
- Manufacturer
- ONICON
- Model
- System-10-BAC BTU Meter Network Interface
- Equipment
- BTU (energy) meter
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 17 (5 writable)
- Transport
- BACnet MS/TP, BACnet IP
- Firmware
- v1.01fA
- Default device instance
- 57017
- Also known as
- System-10-BAC, System-10, System 10 BTU meter, ONICON System-10
Reference only, provided as-is: verify against ONICON’s current documentation and the live device before use. Not official ONICON information. Terms of use.
BMS integration notes: ONICON System-10-BAC BTU Meter Network Interface
Read the energy rate, flow and both temperatures, and the energy and volume totals that match the meter's operating mode (AV 6). Totals are reset from the BMS by writing the zero BVs at priority 8.
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 |
|---|---|---|---|
| AI 1 | Energy Rate | Energy rate, Btu/h by default | Read |
| AI 2 | Volume Rate | Flow rate, gpm by default | Read |
| AI 3 | Supply Temperature | Supply water temperature | Read |
| AI 4 | Return Temperature | Return water temperature | Read |
| AV 1 | Mode 1 Energy Total | Energy total (mode 1 / single mode) | Read |
| AV 2 | Mode 1 Volume Total | Volume total (mode 1 / single mode) | Read |
| AV 12 | Mode 1 Mode 2 Indication | Active mode: 1 = Mode 1, 2 = Mode 2 | Read |
Network setup
- BACnet MS/TP: MAC 1-254, default 17; baud 9600-76800 or auto-baud (default auto) by DIP switch; 120 ohm termination optional.
- BACnet IP: 10Base-T RJ45, default IP 192.168.1.24, mask 255.255.255.0, UDP port 47808.
- Device instance 0-4,194,303, default 57017.
- MAC address and device instance are set from the front panel and must be saved (Y) to take effect; the IP address is changed with ONICON's RUInet utility, then power is cycled.
Watch out for
- Write the zero BVs (BV 11-15) at priority 8, the manual operator level, to reset a total.
- In single mode the mode 2 objects (AV 3, AV 4, BV 13, BV 14) stay unused.
- No segmentation and a 206-byte max APDU, so large ReadPropertyMultiple requests can fail.
- MAC addresses 128 and above are not auto-discovered; add those meters to the BMS by hand.
ONICON System-10-BAC BTU Meter Network Interface 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.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | Energy Rate | Btu/h | Read | ||
| AImin | 2 | Volume Rate | gpm | Read | ||
| AImin | 3 | Supply Temperature | °F | Read | ||
| AImin | 4 | Return Temperature | °F | Read | ||
| AVmin | 1 | Mode 1 Energy Total | Energy total; the only energy register in single mode | Btu | Read | |
| AVmin | 2 | Mode 1 Volume Total | Volume total; the only volume register in single mode | gal | Read | |
| AV | 3 | Mode 2 Energy Total | Only used in dual mode | Btu | Read | |
| AV | 4 | Mode 2 Volume Total | Only used in dual mode | gal | Read | |
| AV | 5 | Auxiliary Input Total (Di3) | Pulse total on input Di3; no units reported | Read | ||
| AV | 6 | Operating Mode (Single, Dual or Bi-directional) | Configured operating mode | Read | 0=None, 1=Single, 2=Dual, 3=BiDir | |
| AVmin | 12 | Mode 1 Mode 2 Indication | Which mode is active | Read | 1=Mode 1, 2=Mode 2 | |
| AV | 13 | BACnet Instance | Device instance number | Read | ||
| BV | 11 | Zero Mode 1 Energy Total | Set active at priority 8 to reset the total | Write | 0=Inactive, 1=Active (reset) | |
| BV | 12 | Zero Mode 1 Volume Total | Set active at priority 8 to reset the total | Write | 0=Inactive, 1=Active (reset) | |
| BV | 13 | Zero Mode 2 Energy Total | Set active at priority 8 to reset the total | Write | 0=Inactive, 1=Active (reset) | |
| BV | 14 | Zero Mode 2 Volume Total | Set active at priority 8 to reset the total | Write | 0=Inactive, 1=Active (reset) | |
| BV | 15 | Zero Auxiliary Input Total | Set active at priority 8 to reset the total | Write | 0=Inactive, 1=Active (reset) |
No points match these filters.
Object ID lookup: ONICON System-10-BAC BTU Meter Network Interface point IDs by name
AI1Energy RateAI2Volume RateAI3Supply TemperatureAI4Return TemperatureAV1Mode 1 Energy TotalAV2Mode 1 Volume TotalAV3Mode 2 Energy TotalAV4Mode 2 Volume TotalAV5Auxiliary Input Total (Di3)AV6Operating Mode (Single, Dual or Bi-directional)AV12Mode 1 Mode 2 IndicationAV13BACnet InstanceBV11Zero Mode 1 Energy TotalBV12Zero Mode 1 Volume TotalBV13Zero Mode 2 Energy TotalBV14Zero Mode 2 Volume TotalBV15Zero Auxiliary Input Total
Integration notes
- Operating mode decides which objects carry data: single mode uses only AV 1/AV 2 and BV 11/BV 12; dual mode also uses the mode 2 totals AV 3/AV 4 and BV 13/BV 14.
- AV 7 to AV 11 are used internally and are not part of the published list.
- The per-object tables print Object_Name only as "Various"; names here are the object descriptions from the main object table (section 2.2). The analog value table uses a few shorter variants such as "Aux Input Total" and "Operating Mode", and AV 13 appears only there.
- Units shown are defaults. Energy rate can be Btu/h, kW or tons; flow l/s, l/min, l/h, m3/h, gpm, ft3/s or ft3/min; totals Btu, ton-hours or kWh and liters, m3, gallons or ft3.
- There is no per-object read/write column; the zero BVs are marked W because the manual says to write them to reset a total.
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 System-10-BAC BTU Meter Network Interface 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 ONICON System-10-BAC BTU Meter Network Interface
How many BACnet points does the ONICON System-10-BAC BTU Meter Network Interface have?
This list has 17 BACnet objects: 4 analog inputs, 8 analog values, 5 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which ONICON System-10-BAC BTU Meter Network Interface BACnet points are writable?
5 of the 17 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. The source has no read/write column, so this is inferred from object type.
Where is the official ONICON System-10-BAC BTU Meter Network Interface BACnet documentation?
The source is System-10-BAC Network Interface Installation Guide (0652-12), revision 08/16, published free by ONICON at https://www.onicon.com/wp-content/uploads/0652-12-System-10-BAC-Network-Interface-Installation-for-email-07-18-1.pdf.
What are the minimum BACnet points to integrate the ONICON System-10-BAC BTU Meter Network Interface?
Start with AI 1 Energy Rate (Energy rate, Btu/h by default); AI 2 Volume Rate (Flow rate, gpm by default); AI 3 Supply Temperature (Supply water temperature); AI 4 Return Temperature (Return water temperature); AV 1 Mode 1 Energy Total (Energy total (mode 1 / single mode)); AV 2 Mode 1 Volume Total (Volume total (mode 1 / single mode)); AV 12 Mode 1 Mode 2 Indication (Active mode: 1 = Mode 1, 2 = Mode 2).
How do I check these points on the real System-10-BAC BTU Meter Network Interface?
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 ONICON BACnet points lists
- Turbine flow meter (insertion)
ONICON F-1500 insertion turbine flow meter (BACnet MS/TP)
ONICON F-1500 series insertion turbine flow meters with the communication type set to BACnet MS/TP.
Also known as: F-1500, F-1500 Series Turbine Meter, ONICON F-1500 BACnet - Ultrasonic flow meter
ONICON F-4600 Inline Ultrasonic Flow Meter (LCD)
ONICON F-4600 inline ultrasonic flow meters with LCD and the BACnet MS/TP output.
Also known as: F-4600, F-4600-BAC, F4600, ONICON F-4600 - Electromagnetic flow meter
ONICON FT-3000 series (FT-3200) inline electromagnetic flow meter, BACnet MS/TP
ONICON FT-3000 series inline electromagnetic flow meters with the BACnet MS/TP output (PICS model FT-32**-*****-21**).
Also known as: FT-3200, FT-3000, FT-32**-*****-21**, ONICON FT-3000 BACnet - BTU (energy) meter, two-channel
ONICON System-1000 Flow and Energy Measurement System
ONICON System-1000 flow and energy (BTU) meters, single or two-channel, with the BACnet MS/TP or BACnet IP network option.
Also known as: System-1000, SYS-1000, SYS-1100-111, SYS-1100-121, SYS-1200-111, SYS-1200-121, ONICON System 1000 BTU meter - BTU (energy) meter
ONICON System-20 BTU Meter
ONICON System-20 BTU meters with the RS485 BACnet MS/TP interface, used on chilled and hot water loops.
Also known as: System-20, System 20, ONICON System-20, S-20 BTU meter - BTU (energy) meter, clamp-on ultrasonic
ONICON System-40 BTU Measurement System
ONICON System-40 BTU measurement systems (clamp-on ultrasonic flow plus supply/return temperature) with the BACnet MS/TP interface.
Also known as: System-40, System 40, System-40-BAC, ONICON System-40
Source: System-10-BAC Network Interface Installation Guide · 0652-12 · rev. 08/16. Object names, instances and units are reproduced as published; descriptions are our own.