Easy BACnet- Home
- BACnet points lists
- Laars
- HTD control - ProtoNode
Boiler controller gateway · BACnet points list
Laars HTD control - ProtoNode BACnet points list
Updated 28 October 2026
The ProtoNode reads the HTD control over Modbus RTU and serves 180 objects per boiler. Analog inputs cover temperatures, flame signal, 0-10 V inputs and outputs, O2/CO2, pressures, firing rates, lockout and alarm codes, LMV burner data and lag states; binary inputs break out the safety chain, outputs and LMV I/O bits. Writable AVs and BVs hold the CH1-CH4, DHW, cascade and hybrid enables, setpoints, PID terms and demands.
This page lists 180 BACnet objects for the Laars HTD control - ProtoNode — 47 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Laars’s own free documentation, linked below.
- Manufacturer
- Laars
- Model
- HTD control - ProtoNode
- Equipment
- Boiler controller gateway
- Equipment type
- Boilers & water heaters
- BACnet objects
- 180 (47 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 50000 + device Node-ID
- Also known as
- HTD, Laars HTD, ProtoNode FPC-N34, ProtoNode FPC-N35, FPC-N34-0701, Laars ProtoNode
BMS integration notes: Laars HTD control - ProtoNode
Enable CH1 with AV 0, give it a call for heat with BV 1 and write the CH1 setpoint (or the cascade setpoint for a cascade). Read the run contact, outlet temperature and firing rate, and watch the alarm contact and 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 |
|---|---|---|---|
| AV 0 | CH1 enable/disable | CH1 enable (1 = enable) | Write |
| BV 1 | CH1 demand | CH1 call for heat (1 = demand) | Write |
| AV 1 | CH1 setpoint | CH1 water setpoint, °C/°F | Write |
| AV 27 | Cascade setpoint | Setpoint when boilers run in cascade | Write |
| BI 11 | Digital Output Status - Run Contact | Boiler run output | Read |
| AI 1 | Outlet sensor | Outlet water temperature, °C/°F | Read |
| AI 33 | Modulating Burner1 Firing rate | Burner 1 firing rate, % | Read |
| BI 12 | Digital Output Status - Alarm Contact | Alarm output | Read |
| AI 35 | Lockout code | Lockout code (0-29) | Read |
Enable & remote start
AV 0 CH1 enable/disable (0 = disable, 1 = enable) and BV 1 CH1 demand (0 = no demand, 1 = demand). CH2-CH4 and DHW have matching objects.
Network setup
- Device instance = Node_Offset + boiler Node-ID. Node_Offset defaults to 50000 and is changed in the ProtoNode web configurator; Node-IDs must be unique, 1-255.
- Boiler to ProtoNode: Modbus RTU, 38400 baud, 8 data bits, no parity, 1 stop bit.
- Default ProtoNode IP address 192.168.1.24, mask 255.255.255.0. Choose BACnet IP or BACnet MS/TP with the Protocol Selector, then add one profile per device with its Node-ID.
- With more than one device on a ProtoNode, set BACnet Virtual Server Nodes to Yes. For BACnet MS/TP also set MAC address, baud rate and Max Master.
- Two or more ProtoNodes on the same subnet need different BACnet Network Numbers (default 50).
- A ProtoNode handles 1,500 registers in total; this profile uses 254 per device.
Watch out for
- PID terms (P unitless, I and D in seconds) for each circuit are writable AVs; they are tuning values, not BMS commands.
- AI 36 Alarm reason uses codes 30-44, continuing the lockout code list in AI 35.
- BV 0 DHW demand reads 0 = Disable, 1 = Enable in the mapping, unlike the CH demand BVs.
Laars HTD control - ProtoNode 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 | |||||
|---|---|---|---|---|---|---|
| AI | 0 | Inlet sensor | °C/°F | Read | ||
| AImin | 1 | Outlet sensor | °C/°F | Read | ||
| AI | 2 | Stack Sensor | °C/°F | Read | ||
| AI | 3 | DHW sensor | °C/°F | Read | ||
| AI | 4 | System Return Sensor | °C/°F | Read | ||
| AI | 5 | System Supply Sensor | °C/°F | Read | ||
| AI | 6 | Outdoor Sensor | °C/°F | Read | ||
| AI | 7 | Auxiliary Sensor 1 | °C/°F | Read | ||
| AI | 8 | Auxiliary Sensor 2 | °C/°F | Read | ||
| AI | 9 | Auxiliary Sensor 3 | °C/°F | Read | ||
| AI | 10 | Auxiliary Sensor 4 | °C/°F | Read | ||
| AI | 11 | Auxiliary Sensor 5 | °C/°F | Read | ||
| AI | 12 | Flame Signal | µA | Read | ||
| AI | 13 | Not used | Marked not used in the mapping | µA | Read | |
| AI | 14 | 0-10VDC (4-20mA) Input for BAS | mV | Read | ||
| AI | 15 | 0-10VDC (4-20mA) Input for Pump | mV | Read | ||
| AI | 16 | 0-10VDC (4-20mA) Input for Mixing Valve | mV | Read | ||
| AI | 17 | 0-10VDC (4-20mA) Input for Auxiliary | mV | Read | ||
| AI | 20 | Current demand source | Read | 0=No demand, 1=Anti Short Cycle, 2=Service, 3=DHW, 4=Slave Cascade, 5=External, 6=CH1, 7=CH2, 8=CH3, 9=CH4, 10=Antifrost | ||
| AI | 23 | 0-10VDC (4-20mA) Output for Pump Speed | mV | Read | ||
| AI | 24 | 0-10VDC (4-20mA) Output for Fan Speed | mV | Read | ||
| AI | 25 | 0-10VDC (4-20mA) Output for Mixing Valve | mV | Read | ||
| AI | 26 | 0-10VDC (4-20mA) Output for Auxiliary 1 | mV | Read | ||
| AI | 27 | Modulating Fan 1 - Speed | rpm | Read | ||
| AI | 28 | O2 | % | Read | ||
| AI | 29 | High/Low Blower 1 Status | Read | 0=Off, 1=Low, 2=High | ||
| AI | 30 | CO2 | % | Read | ||
| AI | 31 | Pressure 1 | in. W.C. | Read | ||
| AI | 32 | Pressure 2 | in. W.C. | Read | ||
| AImin | 33 | Modulating Burner1 Firing rate | % | Read | ||
| AI | 34 | Modulating Burner2 Firing rate | % | Read | ||
| AImin | 35 | Lockout code | Read | 0=Low Flow Error, 1=Low Water Cut Off Error, 2=Manual Reset High Limit Error, 3=Blocked Flue Error, 4=High Gas Pressure Error, 5=Low Gas Pressure Error, 6=Auto Reset High Limit Error, 7=Spare Safety Chain Error, 8=Outlet Probe Error, 9=Outlet Probe Drift Error, 10=Outlet Probe High Limit Error, 11=Flue Probe Error, 12=Condensing Shutdown Error, 13=Flue Probe Drift Error, 14=Flue Probe High Limit Error, 15=Inlet Probe Error, 16=Delta T Error, 17=Generic Lockout, 18=Burner1 APS Switch Error, 19=Burner2 APS Switch Error, 20=Burner1 HSI Flame Error, 21=Burner2 HSI Flame Error, 22=Burner1 Max Trials Error, 23=Burner2 Max Trials Error, 24=Burner1 Max Flame Lost Error, 25=Burner2 Max Flame Lost Error, 26=Burner1 Proven HSI Error, 27=Burner2 Proven HSI Error, 28=Burner1 Fan Speed Error, 29=Burner2 Fan Speed Error | ||
| AI | 36 | Alarm reason | Read | 30=24VDC Error, 31=24VAC Error, 32=DHW Probe Error, 33=System Supply Probe Error, 34=System Return Probe Error, 35=Outdoor Probe Error, 36=Spare1 Probe Error, 37=Spare2 Probe Error, 38=Spare3 Probe Error, 39=Spare4 Probe Error, 40=Spare5 Probe Error, 41=High Limit Auto Error, 42=High Delta T Error, 43=Fan Speed Error, 44=Condensing Alarm | ||
| AI | 37 | LMV - Phase | LMV burner sequence phase | Read | 0=Lockout, 2=Safety, 10=Home Run Position, 12=Burner Standby, 22=Combustion Fan, SV On, 24=Drive to Prepurge Position, 30=Prepurge, 35=VSD Drive to Ignition Position, 36=Drive to Ignition Position, 38=Preignition (Spark) On, 40=Pilot Vlave On, 42=Ignition (Spark) Off, 44=Interval 1 (Pilot Stabilization), 50=Safety Time 2, 52=Interval 2 (Main Stabilization), 60=Operation 1 (Normal Operation), 62=Operation 2 (Driving to Low Fire), 64=Drive to Ignition Position, 65=Interval 2, 66=Ignition (Spark) + Pilot Valve On, 67=Main Valve Off, 68=Pilot Waiting Time, 69=Pilot Waiting Time - Startup (Interval 1), 70=Afterburn Time, 72=Drive to Postpurge Position, 74=Mandatory Postpurge, 78=Optional Postpurge, 80=Evacuate, 81=Atmospheric Test, 82=Fill, 83=Pressure Test, 90=Gas Shortage | |
| AI | 38 | History - DHW Heat Demand Cycles | Cycle count | Read | ||
| AI | 39 | History - CH1 Heat Demand Cycles | Cycle count | Read | ||
| AI | 40 | History - CH2 Heat Demand Cycles | Cycle count | Read | ||
| AI | 41 | History - CH3 Heat Demand Cycles | Cycle count | Read | ||
| AI | 42 | History - CH4 Heat Demand Cycles | Cycle count | Read | ||
| AI | 43 | History - Cascade Heat Demand Cycles | Cycle count | Read | ||
| AI | 44 | History - Burner Stage 1 Cycles | Cycle count | Read | ||
| AI | 45 | LMV - Fuel Actuator Position | Actuator position, -50 to 150° | Read | ||
| AI | 46 | LMV - Air Actuator Position | Actuator position, -50 to 150° | Read | ||
| AI | 47 | LMV - VSD Setting | % | Read | ||
| AI | 48 | History - Boiler Pump Cycles | Cycle count | Read | ||
| AI | 49 | History - DHW Pump Cycles | Cycle count | Read | ||
| AI | 50 | History - System Pump Cycles | Cycle count | Read | ||
| AI | 51 | History - Average Boiler Outlet Temperature | °C/°F | Read | ||
| AI | 52 | History - Maximum Boiler Outlet Temperature | °C/°F | Read | ||
| AI | 53 | History - Minimum Boiler Outlet Temperature | °C/°F | Read | ||
| AI | 54 | History - Boiler Average Firing Temperature | °C/°F | Read | ||
| AI | 55 | History - Boiler Maximum Firing Time | h | Read | ||
| AI | 56 | History - Boiler Minimum Firing Time | h | Read | ||
| AI | 57 | LMV - Modulation Rate | % | Read | ||
| AI | 58 | LMV - Flame Signal | % | Read | ||
| AI | 59 | LMV - Error Code | Code 0-255 | Read | ||
| AI | 60 | LMV - Diagnostic Code | Code 0-255 | Read | ||
| AI | 63 | LMV - Burner ID | Decode with the LMV manual | Read | ||
| AI | 64 | Modulating probe | Read | 0=None, 1=Outlet, 2=DHW, 3=System Supply, 4=Inlet, 5=Flue, 6=System Return | ||
| AI | 65 | Service active | % | Read | ||
| AI | 66 | Lag 1 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 67 | Lag 1 Firing Rate | % | Read | ||
| AI | 68 | Lag 2 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 69 | Lag 2 Firing Rate | % | Read | ||
| AI | 70 | Lag 3 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 71 | Lag 3 Firing Rate | % | Read | ||
| AI | 72 | Lag 4 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 73 | Lag 4 Firing Rate | % | Read | ||
| AI | 74 | Lag 5 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 75 | Lag 5 Firing Rate | % | Read | ||
| AI | 76 | Lag 6 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 77 | Lag 6 Firing Rate | % | Read | ||
| AI | 78 | Lag 7 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 79 | Lag 7 Firing Rate | % | Read | ||
| AI | 80 | Lead 0 State | Read | 0=Not Present, 1=Not Available, 2=Available, 3=Running, 4=Locked out | ||
| AI | 81 | Lead 0 Firing Rate | % | Read | ||
| AI | 83 | Active CH setpoint | Read | |||
| AI | 84 | Burner Status 1 | Read | 0=Off, 1=On | ||
| AI | 85 | LMV - Lower Trim Limit | Decode with the LMV manual | Read | ||
| AI | 86 | LMV - Upper Trim Limit | Decode with the LMV manual | Read | ||
| AI | 87 | LMV - Current Trim | Decode with the LMV manual | Read | ||
| AI | 88 | LMV - Fan Speed | % | Read | ||
| AI | 89 | Boiler Pump Status | Read | 0=Off, 1=On | ||
| AI | 90 | Cascade Lead Heat Demand | Read | 0=Off, 1=On | ||
| AI | 91 | Burner 1 Run Time | h | Read | ||
| AI | 92 | Burner 2 Run Time | h | Read | ||
| AVmin | 0 | CH1 enable/disable | Write | 0=Disable, 1=Enable | ||
| AVmin | 1 | CH1 setpoint | °C/°F | Write | ||
| AV | 2 | CH1 P | Write | |||
| AV | 3 | CH1 I | s | Write | ||
| AV | 4 | CH1 D | s | Write | ||
| AV | 5 | CH2 enable/disable | Write | 0=Disable, 1=Enable | ||
| AV | 6 | CH2 setpoint | °C/°F | Write | ||
| AV | 7 | CH2 P | Write | |||
| AV | 8 | CH2 I | s | Write | ||
| AV | 9 | CH2 D | s | Write | ||
| AV | 10 | CH3 enable/disable | Write | 0=Disable, 1=Enable | ||
| AV | 11 | CH3 setpoint | °C/°F | Write | ||
| AV | 12 | CH3 P | Write | |||
| AV | 13 | CH3 I | s | Write | ||
| AV | 14 | CH3 D | s | Write | ||
| AV | 15 | CH4 enable/disable | Write | 0=Disable, 1=Enable | ||
| AV | 16 | CH4 setpoint | °C/°F | Write | ||
| AV | 17 | CH4 P | Write | |||
| AV | 18 | CH4 I | s | Write | ||
| AV | 19 | CH4 D | s | Write | ||
| AV | 20 | DHW enable/disable | Write | 0=Disable, 1=Enable | ||
| AV | 21 | DHW setpoint | °C/°F | Write | ||
| AV | 22 | DHW P | Write | |||
| AV | 23 | DHW I | s | Write | ||
| AV | 24 | DHW D | s | Write | ||
| AV | 25 | DHW recirculation enable | Write | 0=Disable, 1=Enable | ||
| AV | 26 | DHW recirculation Set point | °C/°F | Write | ||
| AVmin | 27 | Cascade setpoint | °C/°F | Write | ||
| AV | 28 | Cascade P | Write | |||
| AV | 29 | Cascade I | s | Write | ||
| AV | 30 | Cascade D | s | Write | ||
| AV | 35 | Hybrid setpoint | °C/°F | Write | ||
| AV | 36 | Hybrid differential temp | °C/°F | Write | ||
| AV | 37 | VariPrime P | Write | |||
| AV | 38 | VariPrime I | s | Write | ||
| AV | 39 | VariPrime D | s | Write | ||
| AV | 40 | VariPrime delta T | °C/°F | Write | ||
| AV | 41 | AntiCondens Enable | Write | 0=Disable, 1=Enable | ||
| AV | 42 | AntiCondens Temp | °C/°F | Write | ||
| AV | 43 | AntiCondens P | Write | |||
| AV | 44 | AntiCondens I | s | Write | ||
| AV | 45 | AntiCondens D | s | Write | ||
| BI | 1 | Safety Chain Status - flow | Modbus register 40018 bit 0 | Read | ||
| BI | 2 | Safety Chain Status - Low Water Cut-off | Modbus register 40018 bit 1 | Read | ||
| BI | 3 | Safety Chain Status - Manual Reset High Limit | Modbus register 40018 bit 2 | Read | ||
| BI | 4 | Safety Chain Status - Air Proving Switch | Modbus register 40018 bit 3 | Read | ||
| BI | 5 | Safety Chain Status - High Gas Pressure Switch | Modbus register 40018 bit 4 | Read | ||
| BI | 6 | Safety Chain Status - Low Gas Pressure Switch | Modbus register 40018 bit 5 | Read | ||
| BI | 7 | Safety Chain Status - Auto Reset High Limit | Modbus register 40018 bit 6 | Read | ||
| BI | 8 | Safety Chain Status - Field Interlock | Modbus register 40018 bit 7 | Read | ||
| BI | 9 | Non-Safety Chain Status - Interlock 1 | Modbus register 40019 bit 0 | Read | ||
| BI | 10 | Non-Safety Chain Status - Interlock 2 | Modbus register 40019 bit 1 | Read | ||
| BImin | 11 | Digital Output Status - Run Contact | Modbus register 40021 bit 0 | Read | ||
| BImin | 12 | Digital Output Status - Alarm Contact | Modbus register 40021 bit 1 | Read | ||
| BI | 13 | Digital Output Status - DHW Pump | Modbus register 40021 bit 2 | Read | ||
| BI | 14 | Digital Output Status - System Pump | Modbus register 40021 bit 3 | Read | ||
| BI | 15 | Digital Output Status - Auxiliary (40021 bit 4) | Modbus register 40021 bit 4 | Read | ||
| BI | 16 | Digital Output Status - Auxiliary (40021 bit 5) | Modbus register 40021 bit 5 | Read | ||
| BI | 17 | Digital Output Status - Auxiliary (40021 bit 6) | Modbus register 40021 bit 6 | Read | ||
| BI | 18 | Digital Output Status - Boiler Pump | Modbus register 40021 bit 7 | Read | ||
| BI | 19 | Digital Output Status - Auxiliary (40021 bit 8) | Modbus register 40021 bit 8 | Read | ||
| BI | 20 | Gas Valve Status - Pilot Valve 1 | Modbus register 40022 bit 0 | Read | ||
| BI | 21 | Gas Valve Status - Stage 1/Valve 1 | Modbus register 40022 bit 1 | Read | ||
| BI | 22 | LMV - Inputs - Controller On/Off | Modbus register 40061 bit 0 | Read | ||
| BI | 23 | LMV - Inputs - Fan contactor contact | Modbus register 40061 bit 1 | Read | ||
| BI | 24 | LMV - Inputs - Fuel selection oil | Modbus register 40061 bit 2 | Read | ||
| BI | 25 | LMV - Inputs - Fuel selection gas | Modbus register 40061 bit 3 | Read | ||
| BI | 26 | LMV - Inputs - Pressure switch-max-oil | Modbus register 40061 bit 5 | Read | ||
| BI | 27 | LMV - Inputs - Pressure switch-min-oil | Modbus register 40061 bit 6 | Read | ||
| BI | 28 | LMV - Inputs - Pressure switch - valve proving | Modbus register 40061 bit 7 | Read | ||
| BI | 29 | LMV - Inputs - Safety loop | Modbus register 40061 bit 8 | Read | ||
| BI | 30 | LMV - Inputs - Pressure switch-min-gas | Modbus register 40061 bit 10 | Read | ||
| BI | 31 | LMV - Inputs - Pressure switch-max-gas | Modbus register 40061 bit 11 | Read | ||
| BI | 32 | LMV - Inputs - LP | Modbus register 40061 bit 13 | Read | ||
| BI | 33 | LMV - Inputs - Start release oil | Modbus register 40061 bit 14 | Read | ||
| BI | 34 | LMV - Inputs - Heavy oil immediate start | Modbus register 40061 bit 15 | Read | ||
| BI | 35 | LMV - Outputs - Alarm | Modbus register 40062 bit 0 | Read | ||
| BI | 36 | LMV - Outputs - Ignition | Modbus register 40062 bit 4 | Read | ||
| BI | 37 | LMV - Outputs - Start signal/DW valve | Modbus register 40062 bit 5 | Read | ||
| BI | 38 | LMV - Outputs - Fan | Modbus register 40062 bit 6 | Read | ||
| BI | 39 | LMV - Outputs - Oil pump/magnetic coupling | Modbus register 40062 bit 7 | Read | ||
| BI | 40 | LMV - Outputs - Fuel valve SV oil | Modbus register 40062 bit 8 | Read | ||
| BI | 41 | LMV - Outputs - Fuel vlave V1 oil | Modbus register 40062 bit 9 | Read | ||
| BI | 42 | LMV - Outputs - Fuel valve V2 oil | Modbus register 40062 bit 10 | Read | ||
| BI | 43 | LMV - Outputs - Fuel valve V3 oil | Modbus register 40062 bit 11 | Read | ||
| BI | 44 | LMV - Outputs - Fuel valve SV gas | Modbus register 40062 bit 12 | Read | ||
| BI | 45 | LMV - Outputs - Fuel valve V1 gas | Modbus register 40062 bit 13 | Read | ||
| BI | 46 | LMV - Outputs - Fuel valve V2 gas | Modbus register 40062 bit 14 | Read | ||
| BI | 47 | LMV - Outputs - Fuel valve PV gas | Modbus register 40062 bit 15 | Read | ||
| BV | 0 | DHW demand | Write | 0=Disable, 1=Enable | ||
| BVmin | 1 | CH1 demand | Write | 0=No Demand, 1=Demand | ||
| BV | 2 | CH2 demand | Write | 0=No Demand, 1=Demand | ||
| BV | 3 | CH3 demand | Write | 0=No Demand, 1=Demand | ||
| BV | 4 | CH4 demand | Write | 0=No Demand, 1=Demand |
No points match these filters.
Integration notes
- Each boiler on the ProtoNode's RS-485 bus shows up as its own BACnet device, and every one uses the same object IDs. The device instance is Node_Offset (default 50000) plus the boiler's Node-ID, so Node-ID 1 = device 50001.
- The mapping has no read/write column. AV, BV and MV objects are mapped to Metasys N2 outputs and LonWorks input variables, so they are listed here as writable; AI, BI and MI objects are read-only.
- Temperatures are listed as °C/°F; the mapping does not say how the unit is chosen.
- The LMV objects (phase, actuator positions, trim, error and diagnostic codes, LMV inputs and outputs) come from an LMV burner control; several have to be decoded with the LMV manual.
- Bit-mapped registers (safety chain, digital outputs, gas valve, LMV inputs/outputs) are split into one BI per bit; the object names here join the register name and the bit label.
- AI 13 is marked not used.
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 HTD control - ProtoNode 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 Laars HTD control - ProtoNode
How many BACnet points does the Laars HTD control - ProtoNode have?
This list has 180 BACnet objects: 86 analog inputs, 42 analog values, 47 binary inputs, 5 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Laars HTD control - ProtoNode BACnet points are writable?
47 of the 180 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 Laars HTD control - ProtoNode BACnet documentation?
The source is Vendor Protocol Mapping (LAARS Vendor Mappings for the ProtoNode FPC-N34 / FPC-N35) (4404), revision Document Revision 14.B, October 2020, published free by Laars at https://www.laars.com/uploads/products/4404.pdf.
What are the minimum BACnet points to integrate the Laars HTD control - ProtoNode?
Start with AV 0 CH1 enable/disable (CH1 enable (1 = enable)); BV 1 CH1 demand (CH1 call for heat (1 = demand)); AV 1 CH1 setpoint (CH1 water setpoint, °C/°F); AV 27 Cascade setpoint (Setpoint when boilers run in cascade); BI 11 Digital Output Status - Run Contact (Boiler run output); AI 1 Outlet sensor (Outlet water temperature, °C/°F); AI 33 Modulating Burner1 Firing rate (Burner 1 firing rate, %); BI 12 Digital Output Status - Alarm Contact (Alarm output); AI 35 Lockout code (Lockout code (0-29)).
How do I enable BMS control of the Laars HTD control - ProtoNode?
AV 0 CH1 enable/disable (0 = disable, 1 = enable) and BV 1 CH1 demand (0 = no demand, 1 = demand). CH2-CH4 and DHW have matching objects.
How do I check these points on the real HTD control - ProtoNode?
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 Laars BACnet points lists
- Boiler controller gateway
Laars MagnaTherm - ProtoNode
Laars MagnaTherm units, read through a ProtoNode FPC-N34 gateway.
Also known as: MagnaTherm, Laars MagnaTherm, ProtoNode FPC-N34, ProtoNode FPC-N35, FPC-N34-0701, Laars ProtoNode - Boiler controller gateway
Laars Multiburner control - ProtoNode
Laars boilers with the Multiburner control, read through a ProtoNode FPC-N34 gateway (the document does not name the models).
Also known as: Multiburner, Laars Multiburner, Multi-burner, ProtoNode FPC-N34, ProtoNode FPC-N35, FPC-N34-0701, Laars ProtoNode - Boiler controller gateway
Laars OmniTherm - ProtoNode
Laars OmniTherm units, read through a ProtoNode FPC-N34 gateway.
Also known as: OmniTherm, Laars OmniTherm, ProtoNode FPC-N34, ProtoNode FPC-N35, FPC-N34-0701, Laars ProtoNode - Boiler controller gateway
Laars Sola control - ProtoNode
Laars boilers with the Sola control, read through a ProtoNode FPC-N34 gateway (the document does not name the models).
Also known as: Sola, Laars Sola, ProtoNode FPC-N34, ProtoNode FPC-N35, FPC-N34-0701, Laars ProtoNode - Gas valve gateway
Laars SV2 gas valve - ProtoNode
The SV2 device on Laars equipment, read through a ProtoNode FPC-N34 gateway. The document does not describe the SV2; its point names cover a gas valve with VPS tests and pressure and fuel/air modules.
Also known as: SV2, Laars SV2, ProtoNode FPC-N34, ProtoNode FPC-N35, FPC-N34-0701, Laars ProtoNode
Source: Vendor Protocol Mapping (LAARS Vendor Mappings for the ProtoNode FPC-N34 / FPC-N35) · 4404 · rev. Document Revision 14.B, October 2020. Object names, instances and units are reproduced as published; descriptions are our own.