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Commercial boiler controller gateway · BACnet points list
Lochinvar Knight FTXL (ProtoNode FPC-N54) BACnet points list
Updated 6 November 2026
Lochinvar's ProtoNode FPC-N54 start-up guide maps the Knight FTXL boiler's Modbus registers to 46 BACnet objects (Appendix C.6). Four BVs carry room and tank thermostat demands, BIs give safety switch, flame, pump and relay states, AIs give temperatures, firing rate, pump speeds and the status, blocking and lockout codes, and eight AVs take the Modbus board command and BMS-supplied sensor values.
This page lists 46 BACnet objects for the Lochinvar Knight FTXL (ProtoNode FPC-N54) — 12 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Lochinvar’s own free documentation, linked below.
- Manufacturer
- Lochinvar
- Model
- Knight FTXL (ProtoNode FPC-N54)
- Equipment
- Commercial boiler controller gateway
- Equipment type
- Boilers & water heaters
- BACnet objects
- 46 (12 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Also known as
- Knight FTXL, FTXL, Lochinvar FTXL, ProtoNode FPC-N54
Reference only, provided as-is: verify against Lochinvar’s current documentation and the live device before use. Not official Lochinvar information. Terms of use.
BMS integration notes: Lochinvar Knight FTXL (ProtoNode FPC-N54)
Call for heat with the Room Thermostat 1 BV (and Tank Thermostat for DHW), or use the 0-10 Volt Input/Rate Cmd/SP Cmd AV for a rate or setpoint. Read boiler status, outlet temperature, firing rate, flame, alarm contacts and the lockout code.
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 |
|---|---|---|---|
| BV 1 | Room Thermostat 1 | Heat demand (room thermostat 1) from the BMS | Write |
| BV 4 | Tank Thermostat | Tank (DHW) demand from the BMS | Write |
| AV 41 | 0-10 Volt Input/Rate Cmd/SP Cmd | Rate or setpoint command from the BMS | Write |
| AV 39 | Configuration | Configuration register; see the Modbus manual | Write |
| AI 36 | Boiler Status Code | What the boiler is doing | Read |
| AI 31 | Outlet Temperature | Boiler outlet water temperature | Read |
| AI 34 | Firing Rate | Burner firing rate | Read |
| BI 11 | Flame | Flame present | Read |
| BI 16 | Alarm Contacts | Alarm contacts closed | Read |
| AI 38 | Boiler Lockout Code | Active lockout code | Read |
Enable & remote start
BV 1-3 (Room Thermostat 1-3) and BV 4 (Tank Thermostat) are the demand commands; AV 39 Configuration, AV 40 Coils and AV 41 0-10 Volt Input/Rate Cmd/SP Cmd are the Modbus board command registers. The guide does not give the command sequence.
Sensors & values from the BMS
AV 43-46 (tank, outdoor, system supply and return temperature) are writable so the BMS can supply those values; the guide does not say when they are used.
Network setup
- ProtoNode FPC-N54 to the boiler: Modbus RTU, 9600 baud, no parity, 8 data bits, 2 stop bits (IPW: 19200 baud, 1 stop bit).
- Give each unit a unique Node-ID (1-255). BACnet device instance = Node_Offset (default 50,000) + Node-ID.
- BACnet IP or BACnet MS/TP is chosen in the ProtoNode web configurator.
Watch out for
- Access is inferred: the table has no read/write column; BVs and AVs (N2 DO/AO) are treated as writable.
- The guide does not explain Configuration, Coils or the rate/setpoint command; they carry the Lochinvar Modbus board registers, so read the boiler's Lochinvar Modbus communication manual before writing them.
- Discrete Inputs words pack 16 binary states each.
Lochinvar Knight FTXL (ProtoNode FPC-N54) 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 | |||||
|---|---|---|---|---|---|---|
| BVmin | 1 | Room Thermostat 1 | Write | |||
| BV | 2 | Room Thermostat 2 | Write | |||
| BV | 3 | Room Thermostat 3 | Write | |||
| BVmin | 4 | Tank Thermostat | Write | |||
| BI | 5 | Flow Switch | Read | |||
| BI | 6 | Gas Pressure Switch | Read | |||
| BI | 7 | Louver Proving Switch | Read | |||
| BI | 8 | Air Pressure Switch | Read | |||
| BI | 9 | Blocked Drain Switch | Read | |||
| BI | 10 | Auto Reset High Limit | Read | |||
| BImin | 11 | Flame | Read | |||
| BI | 12 | Room Thermostat 1 | Read | |||
| BI | 13 | Tank Thermostat | Read | |||
| BI | 14 | Room Thermostat 2 | Read | |||
| BI | 15 | Run-time Contacts | Read | |||
| BImin | 16 | Alarm Contacts | Read | |||
| BI | 17 | CH Pump | Read | |||
| BI | 18 | DHW Pump 1 | Read | |||
| BI | 19 | Louver Relay | Read | |||
| BI | 20 | Gas Valve | Read | |||
| BI | 21 | System Pump | Read | |||
| BI | 22 | DHW Pump 2 | Read | |||
| AI | 23 | Discrete Inputs 1 - 16 | Read | |||
| AI | 24 | Discrete Inputs 17 - 32 | Read | |||
| AI | 25 | Discrete Inputs 33 - 48 | Read | |||
| AI | 26 | System Cascade Setpoint | Read | |||
| AI | 27 | System Pump Speed | Read | |||
| AI | 28 | Cascade Total Power | Read | |||
| AI | 29 | Cascade Current Power | Read | |||
| AI | 30 | Outlet Setpoint | Read | |||
| AImin | 31 | Outlet Temperature | Read | |||
| AI | 32 | Inlet Temperature | Read | |||
| AI | 33 | Flue Temperature | Read | |||
| AImin | 34 | Firing Rate | Read | |||
| AI | 35 | Boiler Pump Speed | Read | |||
| AImin | 36 | Boiler Status Code | Read | |||
| AI | 37 | Boiler Blocking Code | Read | |||
| AImin | 38 | Boiler Lockout Code | Read | |||
| AVmin | 39 | Configuration | Write | |||
| AV | 40 | Coils | Write | |||
| AVmin | 41 | 0-10 Volt Input/Rate Cmd/SP Cmd | Write | |||
| AV | 42 | Tank Setpoint | Write | |||
| AV | 43 | Tank Temperature | Write | |||
| AV | 44 | Outdoor Temperature | Write | |||
| AV | 45 | System Supply Temperature | Write | |||
| AV | 46 | System Return Temperature | Write |
No points match these filters.
Object ID lookup: Lochinvar Knight FTXL point IDs by name
BV1Room Thermostat 1BV2Room Thermostat 2BV3Room Thermostat 3BV4Tank ThermostatBI5Flow SwitchBI6Gas Pressure SwitchBI7Louver Proving SwitchBI8Air Pressure SwitchBI9Blocked Drain SwitchBI10Auto Reset High LimitBI11FlameBI12Room Thermostat 1BI13Tank ThermostatBI14Room Thermostat 2BI15Run-time ContactsBI16Alarm ContactsBI17CH PumpBI18DHW Pump 1BI19Louver RelayBI20Gas ValveBI21System PumpBI22DHW Pump 2AI23Discrete Inputs 1 - 16AI24Discrete Inputs 17 - 32AI25Discrete Inputs 33 - 48AI26System Cascade SetpointAI27System Pump SpeedAI28Cascade Total PowerAI29Cascade Current PowerAI30Outlet SetpointAI31Outlet TemperatureAI32Inlet TemperatureAI33Flue TemperatureAI34Firing RateAI35Boiler Pump SpeedAI36Boiler Status CodeAI37Boiler Blocking CodeAI38Boiler Lockout CodeAV39ConfigurationAV40CoilsAV410-10 Volt Input/Rate Cmd/SP CmdAV42Tank SetpointAV43Tank TemperatureAV44Outdoor TemperatureAV45System Supply TemperatureAV46System Return Temperature
Integration notes
- Appendix C.6 of the guide (page 51).
- The table has no read/write column, units or states; access is inferred from the N2 type (DO/AO = writable).
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 Knight FTXL (ProtoNode FPC-N54) 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 Lochinvar Knight FTXL (ProtoNode FPC-N54)
How many BACnet points does the Lochinvar Knight FTXL (ProtoNode FPC-N54) have?
This list has 46 BACnet objects: 16 analog inputs, 8 analog values, 18 binary inputs, 4 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Lochinvar Knight FTXL (ProtoNode FPC-N54) BACnet points are writable?
12 of the 46 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 Lochinvar Knight FTXL (ProtoNode FPC-N54) BACnet documentation?
The source is ProtoNode FPC-N54 Start-up Guide For Interfacing Lochinvar Products, Appendix C.6 Knight FTXL (Document Revision 5.A (Lochinvar 2000594856 Rev A)), revision 2020-06 (effective date), published free by Lochinvar at https://assets.lochinvar.com/damroot/Original/10014/161357100338377_2000594856_Rev%20A%20(ProtoNode%20FPC-N54%20Start-up%20Guide%20for%20Lochinvar).pdf.
What are the minimum BACnet points to integrate the Lochinvar Knight FTXL (ProtoNode FPC-N54)?
Start with BV 1 Room Thermostat 1 (Heat demand (room thermostat 1) from the BMS); BV 4 Tank Thermostat (Tank (DHW) demand from the BMS); AV 41 0-10 Volt Input/Rate Cmd/SP Cmd (Rate or setpoint command from the BMS); AV 39 Configuration (Configuration register; see the Modbus manual); AI 36 Boiler Status Code (What the boiler is doing); AI 31 Outlet Temperature (Boiler outlet water temperature); AI 34 Firing Rate (Burner firing rate); BI 11 Flame (Flame present); BI 16 Alarm Contacts (Alarm contacts closed); AI 38 Boiler Lockout Code (Active lockout code).
How do I enable BMS control of the Lochinvar Knight FTXL (ProtoNode FPC-N54)?
BV 1-3 (Room Thermostat 1-3) and BV 4 (Tank Thermostat) are the demand commands; AV 39 Configuration, AV 40 Coils and AV 41 0-10 Volt Input/Rate Cmd/SP Cmd are the Modbus board command registers. The guide does not give the command sequence.
Can the BMS supply sensor values to the Lochinvar Knight FTXL (ProtoNode FPC-N54)?
AV 43-46 (tank, outdoor, system supply and return temperature) are writable so the BMS can supply those values; the guide does not say when they are used.
How do I check these points on the real Knight FTXL (ProtoNode FPC-N54)?
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 Lochinvar BACnet points lists
- Commercial condensing water heater controller
Lochinvar Armor 1250-4000 water heater (SMART SYSTEM)
Lochinvar Armor volume water heaters, models 1250-4000, Series 100 and 101, with the SMART SYSTEM control and the Modbus/BACnet communication board.
Also known as: Armor, Armor 1250, Armor 4000, AWH, Armor Series 100, Armor Series 101, SMART SYSTEM, MTR-01, 100305786 - Commercial boiler / water heater / pool heater controller
Lochinvar Copper-fin II / IIE (CFX, CHX, CPX)
Lochinvar Copper-fin II/IIE boilers and water heaters (models 402-2072) and pool heaters (502-2072) with the SMART SYSTEM control.
Also known as: Copper-fin, Copper-Fin II, Copper-fin IIE, CFX, CHX, CPX, C(F,H,P)X-MODB, CB 402-2072, CW 402-2072 - Condensing boiler controller
Lochinvar Crest
Crest FB/OF 751-6001 and FCB 1000-6000 condensing boilers (the manual uses the same map for Hellcat).
Also known as: Crest FB, Crest OF, Crest FCB, Hellcat - Heating appliance controller gateway (IPW)
Lochinvar IPW (ProtoNode FPC-N54)
Lochinvar IPW units, read through the ProtoNode FPC-N54 gateway (Appendix C.8).
Also known as: IPW, Lochinvar IPW, ProtoNode FPC-N54 - Condensing boiler / water heater controller
Lochinvar Knight / Armor (SMART TOUCH)
Knight, Knight XL, Armor, Wall Mount, Wall Hung, AQUAS, FTXL and Shield boilers and water heaters with the SMART TOUCH control.
Also known as: Knight XL, Outdoor Knight, Armor, Wall Mount, Wall Hung, AQUAS, FTXL, Shield, MODB-I-O - Electric boiler controller
Lochinvar Lectrus electric boiler (KEB)
Lochinvar Lectrus electric boilers, models KEB 0015-0150, with the Modbus/BACnet communication board.
Also known as: Lectrus, KEB, KEB0015, KEB0150, MODB-I-O-KEB, Lochinvar electric boiler - Commercial boiler controller gateway
Lochinvar Power Fin 2.5-5.0 (ProtoNode FPC-N54)
Lochinvar Power Fin boilers in the 2.5-5.0 size range (the guide's "Powerfin_2.5_5.0" profile), read through the ProtoNode FPC-N54 gateway.
Also known as: Power Fin 2.5-5.0, Power-Fin 2500-5000, PBN/PFN 2.5-5.0, Lochinvar Power Fin, ProtoNode FPC-N54 - Commercial boiler / water heater controller
Lochinvar Power-Fin (SMART SYSTEM)
Lochinvar Power-fin models 502-1302 and 1501-2001, with the SMART SYSTEM control and the Modbus/BACnet communication board.
Also known as: Power-fin, Powerfin, PBX-PFX-MODB, SMART SYSTEM - Commercial water heater controller
Lochinvar Regent
Regent IWH 500-1000 commercial gas water heaters.
Also known as: Regent IWH, IWH500-1000 - Dual-heat-exchanger condensing boiler controller
Lochinvar SYNC
SYNC 1.0, 1.3 and 1.5 condensing boilers (two heat exchangers, reported as unit 1 and unit 2).
Also known as: SYNC 1.0, SYNC 1.3, SYNC 1.5, SYNC-MODB - Heat pump water heater plant controller
Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)
Lochinvar Veritus and Emerge_X heat pump water heater systems (up to 64 units), read through the ProtoNode FPC-N54.
Also known as: Veritus, Emerge_X, Emerge X, Lochinvar Veritus, ProtoNode FPC-N54
Source: ProtoNode FPC-N54 Start-up Guide For Interfacing Lochinvar Products, Appendix C.6 Knight FTXL · Document Revision 5.A (Lochinvar 2000594856 Rev A) · rev. 2020-06 (effective date). Object names, instances and units are reproduced as published; descriptions are our own.