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Boiler controller gateway · BACnet points list
Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35) BACnet points list
Updated 6 November 2026
The ProtoNode maps the LOVE temperature (PID) controller used on Patterson-Kelley equipment to 40 objects: process value, setpoint and range, PID tuning, output limits, alarm types and limits, lock and write-in status, run/stop commands and error flags.
This page lists 40 BACnet objects for the Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35) — 25 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Patterson-Kelley’s own free documentation, linked below.
- Manufacturer
- Patterson-Kelley
- Model
- LOVE controller (ProtoNode FPC-N34/N35)
- Equipment
- Boiler controller gateway
- Equipment type
- Boilers & water heaters
- BACnet objects
- 40 (25 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Also known as
- LOVE, P-K LOVE, Patterson-Kelley LOVE, ProtoNode FPC-N34
Reference only, provided as-is: verify against Patterson-Kelley’s current documentation and the live device before use. Not official Patterson-Kelley information. Terms of use.
BMS integration notes: Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35)
Use Control RUN/STOP (BV 27) and the Setpoint (AV 2). Read the process value and output value, and watch the error objects.
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 27 | Control RUN/STOP Setting | Control run command: 0 = STOP, 1 = RUN | Write |
| AV 2 | Setpoint | Temperature setpoint | Write |
| AI 25 | Communication Write-in Selection | Comms write-in must be 1 = enabled to write | Read |
| AI 1 | Process Value | Process value (measured temperature) | Read |
| AV 9 | Output Value | Control output value | Write |
| AI 33 | Input Sensor Did Not Connect | Input sensor not connected | Read |
Enable & remote start
BV 27 Control RUN/STOP Setting (0 = STOP, 1 = RUN) and AV 2 Setpoint. AI 25 Communication Write-in Selection must read 1 (enabled) for network writes; AV 24 Setting Lock Status can lock settings.
Network setup
- ProtoNode FPC-N34 (BACnet MS/TP, BACnet IP, Metasys N2, Modbus TCP) or FPC-N35 (LonWorks).
- Boiler side: Modbus RTU, 9600, 19200 or 38400 baud, 1 or 2 stop bits, no parity, 8 data bits; Node-ID 1-255 per boiler. Mixed ENVI/LOVE/NURO networks must run at 9600.
- BACnet device instance = Node_Offset (default 50,000) + Modbus Node-ID.
Watch out for
- Access is inferred from the N2 types; tuning and alarm objects (AV 5-24) are writable but are controller configuration.
- Process value codes 8002H-8007H mean sensor or memory errors, not temperatures.
Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35) 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 | Process Value | Process value (temperature); error codes 8002H-8007H | Read | ||
| AVmin | 2 | Setpoint | Temperature setpoint | Write | ||
| AI | 3 | Upper-Limit of Temp Range | Read | |||
| AI | 4 | Lower-Limit of Temp Range | Read | |||
| AV | 5 | Control Method | Write | 0=PID, 1=On/Off, 2=manual tuning, 3=PID program control | ||
| AV | 6 | PB Proportional Band | Write | |||
| AV | 7 | Ti Integral Time | Write | |||
| AV | 8 | Td Derivative Time | Write | |||
| AVmin | 9 | Output Value | Control output value | Write | ||
| AV | 10 | Upper-Limit Regulation | Write | |||
| AV | 11 | Lower-Limit Regulation | Write | |||
| AV | 12 | Analog Decimal Setting | Write | |||
| AV | 13 | PID Parameter Selection | Write | |||
| AV | 14 | SV Value | Write | |||
| AV | 15 | Alarm 1 Type | Write | |||
| AV | 16 | Alarm 2 Type | Write | |||
| AV | 17 | Alarm 3 Type | Write | |||
| AV | 18 | Upper-Limit Alarm 1 | Write | |||
| AV | 19 | Lower-Limit Alarm 1 | Write | |||
| AV | 20 | Upper-Limit Alarm 2 | Write | |||
| AV | 21 | Lower-Limit Alarm 2 | Write | |||
| AV | 22 | Upper-Limit Alarm 3 | Write | |||
| AV | 23 | Lower-Limit Alarm 3 | Write | |||
| AV | 24 | Setting Lock Status | Write | 0=normal, 1=all setting lock, 11=lock others than SV value | ||
| AImin | 25 | Communication Write-in Selection | Read | 0=disabled, 1=enabled | ||
| BV | 26 | Temp Unit Display Selection | Write | 0=°F, 1=°C | ||
| BVmin | 27 | Control RUN/STOP Setting | Write | 0=STOP, 1=RUN | ||
| BV | 28 | STOP Setting for PID | Write | 0=RUN, 1=STOP | ||
| BV | 29 | Temp STOP for PID | Write | 0=RUN, 1=temporary STOP | ||
| AI | 30 | PV Unstable | Read | |||
| AI | 31 | Re-initialize | Read | |||
| AI | 32 | PV Value for Error 0002H | Read | |||
| AImin | 33 | Input Sensor Did Not Connect | Read | |||
| AI | 34 | PV Value for error 0003H | Read | |||
| AI | 35 | Input Signal Error | Read | |||
| AI | 36 | PV Value for Error 0004H | Read | |||
| AI | 37 | Over Input Range | Read | |||
| AI | 38 | ADC Fail | Read | |||
| AI | 39 | PV Value for Error 0006H | Read | |||
| AI | 40 | EEPROM Read/Write error | Read |
No points match these filters.
Object ID lookup: Patterson-Kelley LOVE controller point IDs by name
AI1Process ValueAV2SetpointAI3Upper-Limit of Temp RangeAI4Lower-Limit of Temp RangeAV5Control MethodAV6PB Proportional BandAV7Ti Integral TimeAV8Td Derivative TimeAV9Output ValueAV10Upper-Limit RegulationAV11Lower-Limit RegulationAV12Analog Decimal SettingAV13PID Parameter SelectionAV14SV ValueAV15Alarm 1 TypeAV16Alarm 2 TypeAV17Alarm 3 TypeAV18Upper-Limit Alarm 1AV19Lower-Limit Alarm 1AV20Upper-Limit Alarm 2AV21Lower-Limit Alarm 2AV22Upper-Limit Alarm 3AV23Lower-Limit Alarm 3AV24Setting Lock StatusAI25Communication Write-in SelectionBV26Temp Unit Display SelectionBV27Control RUN/STOP SettingBV28STOP Setting for PIDBV29Temp STOP for PIDAI30PV UnstableAI31Re-initializeAI32PV Value for Error 0002HAI33Input Sensor Did Not ConnectAI34PV Value for error 0003HAI35Input Signal ErrorAI36PV Value for Error 0004HAI37Over Input RangeAI38ADC FailAI39PV Value for Error 0006HAI40EEPROM Read/Write error
Integration notes
- Appendix B.2 LOVE of the guide (pages 41-42).
- The table has no read/write column; access is inferred from the N2 type (AO/DO = writable).
- The guide is hosted on weil-mclain.com and prints no boiler brand (only the ProtoNode vendor code Harsco12); ENVI, LOVE and NURO are listed here under Patterson-Kelley.
- State texts come from the notes under the table.
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 LOVE controller (ProtoNode FPC-N34/N35) 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 Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35)
How many BACnet points does the Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35) have?
This list has 40 BACnet objects: 15 analog inputs, 21 analog values, 4 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35) BACnet points are writable?
25 of the 40 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 Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35) BACnet documentation?
The source is ProtoNode FPC-N34 and FPC-N35 Startup Guide For Interfacing Products: ENVI, LOVE, NURO, Appendix B.2 LOVE (Document Revision 14.B), revision 2016-04 (effective date), published free by Patterson-Kelley at https://www.weil-mclain.com/wp-content/uploads/Nuro-Controller-ProtoNode-Startup-Guide_1.pdf.
What are the minimum BACnet points to integrate the Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35)?
Start with BV 27 Control RUN/STOP Setting (Control run command: 0 = STOP, 1 = RUN); AV 2 Setpoint (Temperature setpoint); AI 25 Communication Write-in Selection (Comms write-in must be 1 = enabled to write); AI 1 Process Value (Process value (measured temperature)); AV 9 Output Value (Control output value); AI 33 Input Sensor Did Not Connect (Input sensor not connected).
How do I enable BMS control of the Patterson-Kelley LOVE controller (ProtoNode FPC-N34/N35)?
BV 27 Control RUN/STOP Setting (0 = STOP, 1 = RUN) and AV 2 Setpoint. AI 25 Communication Write-in Selection must read 1 (enabled) for network writes; AV 24 Setting Lock Status can lock settings.
How do I check these points on the real LOVE controller (ProtoNode FPC-N34/N35)?
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 Patterson-Kelley BACnet points lists
- Boiler controller gateway
Patterson-Kelley ENVI boiler control (ProtoNode FPC-N34/N35)
Patterson-Kelley boilers with the ENVI control, read through the ProtoNode FPC-N34 / FPC-N35.
Also known as: ENVI, P-K ENVI, Patterson-Kelley ENVI, ProtoNode FPC-N34 - Boiler controller gateway
Patterson-Kelley NURO boiler control (ProtoNode FPC-N34/N35)
Patterson-Kelley boilers with the NURO control (SOLA based), read through the ProtoNode FPC-N34 / FPC-N35.
Also known as: NURO, P-K NURO, Patterson-Kelley NURO, ProtoNode FPC-N34
Source: ProtoNode FPC-N34 and FPC-N35 Startup Guide For Interfacing Products: ENVI, LOVE, NURO, Appendix B.2 LOVE · Document Revision 14.B · rev. 2016-04 (effective date). Object names, instances and units are reproduced as published; descriptions are our own.