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BACnet instance calculator · VRF BACnet gateway V0CTRL95P-3
Lennox VRF BACnet Gateway Device ID Calculator
Free browser tool · nothing is uploaded · 5 November 2026
The Lennox V0CTRL95P-3 makes every VRF indoor and outdoor unit its own BACnet device, with a 4-digit device ID built from the bus, the unit type and the unit address.
Device ID = bus | type | address: bus (port) 0-3, type 0 for indoor or 1 for outdoor, then the 2-digit unit address. Bus 1, indoor unit 12 is 1012; bus 0, outdoor unit 5 is 105 (written 0105). Inside each device the object instances are fixed.
Lennox calculator
The calculator needs JavaScript. The formula and a worked example are below.
Which unit is this device?
How the numbers are built
device ID = bus x 1000 + type x 100 + address
| Part | Meaning | Range |
|---|---|---|
| bus | RS-485 bus (port) on the gateway | 0-3 |
| type | 0 = indoor unit, 1 = outdoor unit | 0-1 |
| address | Unit address (indoor 00-63, outdoor 00-31) | 00-63 |
Lennox's own examples are 0001 (bus 0, indoor unit 01) and 1105 (bus 1, outdoor unit 05). A leading zero is dropped in the real device instance.
Worked example: bus 1, indoor unit 12
The first objects for bus 1, indoor unit 12 on the V0CTRL95P-3, worked out with the formula above:
| Unit type | Device instance | For |
|---|---|---|
| Indoor unit device | 1012 | Bus (port) 1, Indoor unit address 12 |
| Outdoor unit device | 1105 | Bus (port) 1, Outdoor unit address 5 |
Source
Formula and objects from VRF BACnet Gateway V0CTRL95P-3, Lennox VRF VRB & VPB Systems - User and Application Guide · 507951-02 · rev. 12/2022 (manufacturer document ↗), re-typed in our points list. Object names are shown as printed.
Check it against the live device. The calculator applies the formula from the manufacturer’s documentation; the gateway in front of you may expose fewer objects or use other numbers after a firmware change. Easy BACnet scans a network for BACnet IP devices from an Android phone and reads every object on them — a quick way to confirm one unit before you map a whole building.
Questions
How do I work out a Lennox instance number?
Device ID = bus | type | address: bus (port) 0-3, type 0 for indoor or 1 for outdoor, then the 2-digit unit address. Bus 1, indoor unit 12 is 1012; bus 0, outdoor unit 5 is 105 (written 0105). Inside each device the object instances are fixed.
Why do indoor and outdoor Lennox devices have the same object numbers?
Each unit is its own BACnet device, so AI 1 is room temperature inside an indoor unit device and ambient temperature inside an outdoor unit device. The device ID tells you which one you are reading.
Is this Lennox calculator official?
No. It applies the formula printed in Lennox's own documentation to the points list in our library. Confirm the numbers against a scan of the live device before you map or write anything.
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