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Steam boiler plant sequencer · BACnet points list

Fulton Steam ModSync SE v6.6.1.0 (ProtoNode) BACnet points list

Updated 6 November 2026

Short answer

The steam version of the ModSync SE sequences up to eight steam boilers, and a Sierra Monitor ProtoNode publishes its data as 104 objects (IDs 1-108). Plant objects cover lead boiler, header pressure, building mode, remote enable, setpoint source and value and the alarm code; each boiler then has a 12-object block of local/remote, enable, demand, run, alarm, status, lead/lag position, outlet pressure, firing rate, cycles and run hours.

This page lists 104 BACnet objects for the Fulton Steam ModSync SE v6.6.1.0 (ProtoNode) — 4 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Fulton’s own free documentation, linked below.

Manufacturer
Fulton
Model
Steam ModSync SE v6.6.1.0 (ProtoNode)
Equipment
Steam boiler plant sequencer
Equipment type
Boilers & water heaters
BACnet objects
104 (4 writable)
Transport
BACnet IP, BACnet MS/TP
Firmware
Not stated
Also known as
ModSync SE, ModSync, Fulton ModSync steam, ProtoNode
Source document
ModSync SE BACnet Interface Manual, Version 6.6.1.0
Download CSV 104 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against Fulton’s current documentation and the live device before use. Not official Fulton information. Terms of use.

BMS integration notes: Fulton Steam ModSync SE v6.6.1.0 (ProtoNode)

Integration in brief

Enable the plant with Remote Enable/Disable, set ModSync Setpoint Mode to BMS and write the steam pressure setpoint to BMS Setpoint Input. Read back the active ModSync setpoint, header pressure, each boiler's run and alarm status and the ModSync alarm 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.

ObjectNameWhyAccess
BV 7Remote Enable/DisablePlant enable (1 = enable)Write
AV 9BMS Setpoint Input (Note 2)Steam pressure setpoint from the BMS, psiWrite
AV 10ModSync Setpoint ModeMust be 2 = BMS to use the BMS setpointWrite
BI 16Boiler 1 Run StatusBoiler 1 running (repeat per boiler)Read
AI 11ModSync SetpointActive plant setpoint, psiRead
AV 3Supply Header PressureSupply header steam pressure, psiWrite
AI 22Boiler 1 Firing RateBoiler 1 firing rate, % (repeat per boiler)Read
BI 17Boiler 1 Alarm StatusBoiler 1 alarm (repeat per boiler)Read
AI 12ModSync Alarm CodePlant alarm code from Fulton's alarm chartRead

Enable & remote start

BV 7 Remote Enable/Disable enables the plant from the BMS. For a BMS setpoint, set AV 10 ModSync Setpoint Mode = 2 (BMS) and write AV 9 BMS Setpoint Input; AV 9 only works if that option is enabled at the ModSync.

Sensors & values from the BMS

AV 3 Supply Header Pressure is a read/write analog value (0-200 psi, range depends on the sensor). The manual does not say when the BMS must write it.

Network setup

Watch out for

Fulton Steam ModSync SE v6.6.1.0 (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.

104 of 104 shown
Type
Access
Show
Fulton Steam ModSync SE v6.6.1.0 (ProtoNode) BACnet Points List
DescriptionStates
AI1Lead Boiler PositionRange 0 to 8Read
AVmin3Supply Header PressureRange 0 to 200; range depends on sensorpsiWrite
BI6Building ModeRead0=Unoccupied, 1=Occupied
BVmin7Remote Enable/DisableWrite0=Disable, 1=Enable
AVmin9BMS Setpoint Input (Note 2)Range 0 to 200; range depends on sensorpsiWrite
AVmin10ModSync Setpoint ModeWrite0=ModSync, 1=Remote SP, 2=BMS, 3=Manual
AImin11ModSync SetpointRange 0 to 200; range depends on sensorpsiRead
AImin12ModSync Alarm CodePlant alarm code; see the alarm chart in the manualRead
BI13Boiler 1 Local/Remote StatusRead0=Local, 1=Remote
BI14Boiler 1 ModSync Enable/DisableRead0=Disable, 1=Enable
BI15Boiler 1 Heat DemandRead0=Off, 1=On
BImin16Boiler 1 Run StatusRead0=Off, 1=On
BImin17Boiler 1 Alarm StatusRead0=Off, 1=On
BI18Boiler 1 Current Fuel (Note 3)Read0=Gas, 1=Oil
AI19Boiler 1 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open BACnet Object ID
AI20Boiler 1 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI21Boiler 1 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AImin22Boiler 1 Firing RateRange 0 to 100%Read
AI23Boiler 1 ModSync CyclesRange 0 to 999999999Read
AI24Boiler 1 ModSync Run HoursRange 0 to 999999999Read
BI25Boiler 2 Local/Remote StatusRead0=Local, 1=Remote
BI26Boiler 2 ModSync Enable/DisableRead0=Disable, 1=Enable
BI27Boiler 2 Heat DemandRead0=Off, 1=On
BI28Boiler 2 Run StatusRead0=Off, 1=On
BI29Boiler 2 Alarm StatusRead0=Off, 1=On
BI30Boiler 2 Current Fuel (Note 3)Read0=Gas, 1=Oil
AI31Boiler 2 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open
AI32Boiler 2 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI33Boiler 2 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AI34Boiler 2 Firing RateRange 0 to 100%Read
AI35Boiler 2 ModSync CyclesRange 0 to 999999999Read
AI36Boiler 2 ModSync Run HoursRange 0 to 999999999Read
BI37Boiler 3 Local/Remote StatusRead0=Local, 1=Remote
BI38Boiler 3 ModSync Enable/DisableRead0=Disable, 1=Enable
BI39Boiler 3 Heat DemandRead0=Off, 1=On
BI40Boiler 3 Run StatusRead0=Off, 1=On
BI41Boiler 3 Alarm StatusRead0=Off, 1=On
BI42Boiler 3 Current Fuel (Note 3)Read0=Gas, 1=Oil
AI43Boiler 3 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open
AI44Boiler 3 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI45Boiler 3 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AI46Boiler 3 Firing RateRange 0 to 100%Read
AI47Boiler 3 ModSync CyclesRange 0 to 999999999Read
AI48Boiler 3 ModSync Run HoursRange 0 to 999999999Read
BI49Boiler 4 Local/Remote StatusRead0=Local, 1=Remote
BI50Boiler 4 ModSync Enable/DisableRead0=Disable, 1=Enable
BI51Boiler 4 Heat DemandRead0=Off, 1=On
BI52Boiler 4 Run StatusRead0=Off, 1=On
BI53Boiler 4 Alarm StatusRead0=Off, 1=On
BI54Boiler 4 Current Fuel (Note 3)Read0=Gas, 1=Oil
AI55Boiler 4 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open
AI56Boiler 4 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI57Boiler 4 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AI58Boiler 4 Firing RateRange 0 to 100%Read
AI59Boiler 4 ModSync CyclesRange 0 to 999999999Read
AI60Boiler 4 ModSync Run HoursRange 0 to 999999999Read
BI61Boiler 5 Local/Remote StatusRead0=Local, 1=Remote
BI62Boiler 5 ModSync Enable/DisableRead0=Disable, 1=Enable
BI63Boiler 5 Heat DemandRead0=Off, 1=On
BI64Boiler 5 Run StatusRead0=Off, 1=On
BI65Boiler 5 Alarm StatusRead0=Off, 1=On
BI66Boiler 5 Current Fuel (Note 3)Read0=Gas, 1=Oil
AI67Boiler 5 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open
AI68Boiler 5 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI69Boiler 5 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AI70Boiler 5 Firing RateRange 0 to 100%Read
AI71Boiler 5 ModSync CyclesRange 0 to 999999999Read
AI72Boiler 5 ModSync Run HoursRange 0 to 999999999Read
BI73Boiler 6 Local/Remote StatusRead0=Local, 1=Remote
BI74Boiler 6 ModSync Enable/DisableRead0=Disable, 1=Enable
BI75Boiler 6 Heat DemandRead0=Off, 1=On
BI76Boiler 6 Run StatusRead0=Off, 1=On
BI77Boiler 6 Alarm StatusRead0=Off, 1=On
BI78Boiler 6 Current Fuel (Note 3)Read0=Gas, 1=Oil
AI79Boiler 6 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open
AI80Boiler 6 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI81Boiler 6 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AI82Boiler 6 Firing RateRange 0 to 100%Read
AI83Boiler 6 ModSync CyclesRange 0 to 999999999Read
AI84Boiler 6 ModSync Run HoursRange 0 to 999999999Read
BI85Boiler 7 Local/Remote StatusRead0=Local, 1=Remote
BI86Boiler 7 ModSync Enable/DisableRead0=Disable, 1=Enable
BI87Boiler 7 Heat DemandRead0=Off, 1=On
BI88Boiler 7 Run StatusRead0=Off, 1=On
BI89Boiler 7 Alarm StatusRead0=Off, 1=On
BI90Boiler 7 Current Fuel (Note 3)Read0=Gas, 1=Oil
AI91Boiler 7 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open
AI92Boiler 7 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI93Boiler 7 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AI94Boiler 7 Firing RateRange 0 to 100%Read
AI95Boiler 7 ModSync CyclesRange 0 to 999999999Read
AI96Boiler 7 ModSync Run HoursRange 0 to 999999999Read
BI97Boiler 8 Local/Remote StatusRead0=Local, 1=Remote
BI98Boiler 8 ModSync Enable/DisableRead0=Disable, 1=Enable
BI99Boiler 8 Heat DemandRead0=Off, 1=On
BI100Boiler 8 Run StatusRead0=Off, 1=On
BI101Boiler 8 Alarm StatusRead0=Off, 1=On
BI102Boiler 8 Current Fuel (Note 2)Read0=Gas, 1=Oil
AI103Boiler 8 StatusRead0=Disabled By ModSync, 1=Temp Override, 2=Remote Disable, 3=Outside Temp Cutoff, 4=Standby, 5=Purging, 6=Gas Valve Energized, 7=Modulating, 8=Air Switch Alarm, 10=Heat Demand, 11=Low Gas Pressure, 13=Safety Loop Alarm, 14=LMV Error, 15=Disabled By BMS, 16=Modbus Com Error, 17=Post Purge, 18=Boiler Alarm, 19=Limit String Open
AI104Boiler 8 Lead Lag PositionRead0=Manual, 1=Disabled, 2=Lead, 3=Lag 1, 4=Lag 2, 5=Lag 3, 6=Lag 4, 7=Lag 5, 8=Lag 6, 9=Lag 7
AI105Boiler 8 Outlet PressureRange 0 to 200; range depends on sensorpsiRead
AI106Boiler 8 Firing RateRange 0 to 100%Read
AI107Boiler 8 ModSync CyclesRange 0 to 999999999Read
AI108Boiler 8 ModSync Run HoursRange 0 to 999999999Read
Object ID lookup: Fulton Steam ModSync SE v6.6.1.0 point IDs by name

Integration notes

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 Steam ModSync SE v6.6.1.0 (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 Fulton Steam ModSync SE v6.6.1.0 (ProtoNode)

How many BACnet points does the Fulton Steam ModSync SE v6.6.1.0 (ProtoNode) have?

This list has 104 BACnet objects: 51 analog inputs, 3 analog values, 49 binary inputs, 1 binary value. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Fulton Steam ModSync SE v6.6.1.0 (ProtoNode) BACnet points are writable?

4 of the 104 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.

Where is the official Fulton Steam ModSync SE v6.6.1.0 (ProtoNode) BACnet documentation?

The source is ModSync SE BACnet Interface Manual, Version 6.6.1.0, published free by Fulton at https://fulton.com/app/uploads/2021/07/ModSync-SE-Steam-v6610-BACnet-260611.pdf.

What are the minimum BACnet points to integrate the Fulton Steam ModSync SE v6.6.1.0 (ProtoNode)?

Start with BV 7 Remote Enable/Disable (Plant enable (1 = enable)); AV 9 BMS Setpoint Input (Note 2) (Steam pressure setpoint from the BMS, psi); AV 10 ModSync Setpoint Mode (Must be 2 = BMS to use the BMS setpoint); BI 16 Boiler 1 Run Status (Boiler 1 running (repeat per boiler)); AI 11 ModSync Setpoint (Active plant setpoint, psi); AV 3 Supply Header Pressure (Supply header steam pressure, psi); AI 22 Boiler 1 Firing Rate (Boiler 1 firing rate, % (repeat per boiler)); BI 17 Boiler 1 Alarm Status (Boiler 1 alarm (repeat per boiler)); AI 12 ModSync Alarm Code (Plant alarm code from Fulton's alarm chart).

How do I enable BMS control of the Fulton Steam ModSync SE v6.6.1.0 (ProtoNode)?

BV 7 Remote Enable/Disable enables the plant from the BMS. For a BMS setpoint, set AV 10 ModSync Setpoint Mode = 2 (BMS) and write AV 9 BMS Setpoint Input; AV 9 only works if that option is enabled at the ModSync.

Can the BMS supply sensor values to the Fulton Steam ModSync SE v6.6.1.0 (ProtoNode)?

AV 3 Supply Header Pressure is a read/write analog value (0-200 psi, range depends on the sensor). The manual does not say when the BMS must write it.

How do I check these points on the real Steam ModSync SE v6.6.1.0 (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 Fulton BACnet points lists

Source: ModSync SE BACnet Interface Manual, Version 6.6.1.0. Object names, instances and units are reproduced as published; descriptions are our own.