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Boiler sequencer (boiler management system) · BACnet points list

Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX BACnet points list

Updated 12 November 2026

Short answer

Gateway profile for the AERCO BMS / BMS II plant sequencer: 188 objects (173 AI, 15 BI), 34 polled by default. It reads header, outside and indoor/return temperatures, header setpoint, fire rate out, boilers fired and on line, the fault/message bits and the configuration menu values. There are no output objects.

This page lists 188 BACnet objects for the Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX — 0 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Contemporary Controls’s own free documentation, linked below.

Manufacturer
Contemporary Controls
Model
AERCO BMS / BMS II Boiler Management System via BASgatewayLX
Equipment
Boiler sequencer (boiler management system)
Equipment type
Boilers & water heaters
BACnet objects
188 (0 writable)
Transport
BACnet IP
Firmware
Not stated
Also known as
AERCO BMS, AERCO BMS II, Boiler Management System, BMSII
Source document
BASgatewayLX Modbus device profile Aerco_Boiler_Mgmt_System_BMS_BMSII · Aerco_Boiler_Mgmt_System_BMS_BMSII_LX.csv
Download CSV 188 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 Contemporary Controls’s current documentation and the live device before use. Not official Contemporary Controls information. Terms of use.

BMS integration notes: Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX

Integration in brief

Read header temperature against the header setpoint, fire rate and boilers fired; watch the fault bits. Setpoints are changed on the BMS panel, not through this profile.

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
AI 1Header TemperatureHeader temperatureRead
AI 5Header Set TemperatureHeader setpointRead
AI 4Fire Rate OutFire rate out, %Read
AI 7Total Boilers FiredBoilers firingRead
AI 8Total Boilers On LineBoilers on lineRead
AI 2Outside Air TemperatureOutside air temperatureRead
BI 10Fault/Message Code Bit 1 = Header Sensor ErrorHeader sensor errorRead
BI 58Bit map BMS II Only Bit 1 = Fault RelayFault relay (BMS II only)Read

Network setup

Watch out for

Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX 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.

188 of 188 shown
Type
AnalogBinary
Show
Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX BACnet Points List
DescriptionStates
AImin1Header TemperatureModbus 300002°FRead
AImin2Outside Air TemperatureModbus 300003°FRead
AI3Indoor Air/Return TemperatureModbus 300004°FRead
AImin4Fire Rate OutModbus 300005%Read
AImin5Header Set TemperatureModbus 300006°FRead
AI6Network AddressModbus 300007; not polled by defaultRead
AImin7Total Boilers FiredModbus 300008Read
AImin8Total Boilers On LineModbus 300009Read
BI9Fault/Message Code Bit 0 = Outside Air SensorModbus 300011 bit 0Read
BImin10Fault/Message Code Bit 1 = Header Sensor ErrorModbus 300011 bit 1Read
BI11Fault/Message Code Bit 2 = Interlock 1 ErrorModbus 300011 bit 2Read
BI12Fault/Message Code Bit 3 = Interlock 2 ErrorModbus 300011 bit 3Read
BI13Fault/Message Code BMS Bit 4 = Indoor Air Sensor ErrorModbus 300011 bit 4Read
BI14Fault/Message Code BMSII Bit 4 = Return Sensor ErrorModbus 300011 bit 4Read
BI15Fault/Message Code Bit 5 = 4-20mA Input ErrorModbus 300011 bit 5Read
AI16Lead Boiler NumberModbus 300017Read
AI17Boiler 1 Status (PWM Boiler 1)Modbus 300018; not polled by defaultRead
AI18Boiler 2 Status (PWM Boiler 2)Modbus 300019; not polled by defaultRead
AI19Boiler 3 Status (PWM Boiler 3)Modbus 300020; not polled by defaultRead
AI20Boiler 4 Status (PWM Boiler 4)Modbus 300021; not polled by defaultRead
AI21Boiler 5 Status (PWM Boiler 5)Modbus 300022; not polled by defaultRead
AI22Boiler 6 Status (PWM Boiler 6)Modbus 300023; not polled by defaultRead
AI23Boiler 7 Status (PWM Boiler 7)Modbus 300024; not polled by defaultRead
AI24Boiler 8 Status (PWM Boiler 8)Modbus 300025; not polled by defaultRead
AI25Boiler 9 Status (BMS) (Net Boiler 1) Boiler 1 Status (BMS II)Modbus 300026; not polled by defaultRead
AI26Boiler 10 Status (BMS) (Net Boiler 2) Boiler 2 Status (BMS II)Modbus 300027; not polled by defaultRead
AI27Boiler 11 Status (BMS) (Net Boiler 3) Boiler 3 Status (BMS II)Modbus 300028; not polled by defaultRead
AI28Boiler 12 Status (BMS) (Net Boiler 4) Boiler 4 Status (BMS II)Modbus 300029; not polled by defaultRead
AI29Boiler 13 Status (BMS) (Net Boiler 5) Boiler 5 Status (BMS II)Modbus 300030; not polled by defaultRead
AI30Boiler 14 Status (BMS) (Net Boiler 6) Boiler 6 Status (BMS II)Modbus 300031; not polled by defaultRead
AI31Boiler 15 Status (BMS) (Net Boiler 7) Boiler 7 Status (BMS II)Modbus 300032; not polled by defaultRead
AI32Boiler 16 Status (BMS) (Net Boiler 8) Boiler 8 Status (BMS II)Modbus 300033; not polled by defaultRead
AI33Boiler 17 Status (BMS) (Net Boiler 9) Boiler 9 Status (BMS II)Modbus 300034; not polled by defaultRead
AI34Boiler 18 Status (BMS) (Net Boiler 10) Boiler 10 Status (BMS II)Modbus 300035; not polled by defaultRead
AI35Boiler 19 Status (BMS) (Net Boiler 11) Boiler 11 Status (BMS II)Modbus 300036; not polled by defaultRead
AI36Boiler 20 Status (BMS) (Net Boiler 12) Boiler 12 Status (BMS II)Modbus 300037; not polled by defaultRead
AI37Boiler 21 Status (BMS) (Net Boiler 13) Boiler 13 Status (BMS II)Modbus 300038; not polled by defaultRead
AI38Boiler 22 Status (BMS) (Net Boiler 14) Boiler 14 Status (BMS II)Modbus 300039; not polled by defaultRead
AI39Boiler 23 Status (BMS) (Net Boiler 15) Boiler 15 Status (BMS II)Modbus 300040; not polled by defaultRead
AI40Boiler 24 Status (BMS) (Net Boiler 16) Boiler 16 Status (BMS II)Modbus 300041; not polled by defaultRead
AI41Boiler 25 Status (BMS) (Net Boiler 17) Boiler 17 Status (BMS II)Modbus 300042; not polled by defaultRead
AI42Boiler 26 Status (BMS) (Net Boiler 18) Boiler 18 Status (BMS II)Modbus 300043; not polled by defaultRead
AI43Boiler 27 Status (BMS) (Net Boiler 19) Boiler 19 Status (BMS II)Modbus 300044; not polled by defaultRead
AI44Boiler 28 Status (BMS) (Net Boiler 20) Boiler 20 Status (BMS II)Modbus 300045; not polled by defaultRead
AI45Boiler 29 Status (BMS) (Net Boiler 21) Boiler 21 Status (BMS II)Modbus 300046; not polled by defaultRead
AI46Boiler 30 Status (BMS) (Net Boiler 22) Boiler 22 Status (BMS II)Modbus 300047; not polled by defaultRead
AI47Boiler 31 Status (BMS) (Net Boiler 23) Boiler 23 Status (BMS II)Modbus 300048; not polled by defaultRead
AI48Boiler 32 Status (BMS) (Net Boiler 24) Boiler 24 Status (BMS II)Modbus 300049; not polled by defaultRead
AI49Boiler 33 Status (BMS) (Net Boiler 25) Boiler 25 Status (BMS II)Modbus 300050; not polled by defaultRead
AI50Boiler 34 Status (BMS) (Net Boiler 25) Boiler 25 Status (BMS II)Modbus 300051; not polled by defaultRead
AI51Boiler 35 Status (BMS) (Net Boiler 27) Boiler 27 Status (BMS II)Modbus 300052; not polled by defaultRead
AI52Boiler 36 Status (BMS) (Net Boiler 28) Boiler 28 Status (BMS II)Modbus 300053; not polled by defaultRead
AI53Boiler 37 Status (BMS) (Net Boiler 29) Boiler 29 Status (BMS II)Modbus 300054; not polled by defaultRead
AI54Boiler 38 Status (BMS) (Net Boiler 30) Boiler 30 Status (BMS II)Modbus 300055; not polled by defaultRead
AI55Boiler 39 Status (BMS) (Net Boiler 31) Boiler 31 Status (BMS II)Modbus 300056; not polled by defaultRead
AI56Boiler 40 Status (BMS) (Net Boiler 32) Boiler 32 Status (BMS II)Modbus 300057; not polled by defaultRead
BI57Bit map BMS II Only Bit 0 = AUX RelayModbus 300058 bit 0Read
BImin58Bit map BMS II Only Bit 1 = Fault RelayModbus 300058 bit 1Read
BI59Bit map BMS II Only Bit 2 = Sys Start RelayModbus 300058 bit 2Read
BI60Bit map BMS II Only Bit 3 = EmptyModbus 300058 bit 3Read
BI61Bit map BMS II Only Bit 4 = SetbackModbus 300058 bit 4Read
BI62Bit map BMS II Only Bit 5 = Interlock 2Modbus 300058 bit 5Read
BI63Bit map BMS II Only Bit 6 = Interlock 1Modbus 300058 bit 6Read
BI64Bit map BMS II Only Bit 7 = EmptyModbus 300058 bit 7Read
AI65Return Sensor Temp BMS II OnlyModbus 300059°FRead
AI66Net Header Set TempModbus 400005°FRead
AI67System Start TempModbus 400006°FRead
AI68System Start OptionModbus 400007Read
AI69Manual Hdr Set Manual Hdr SetModbus 400008°FRead
AI70Bldg Ref TempModbus 400009°FRead
AI71Indoor Prop BandModbus 400010°FRead
AI72Indoor Setpoint TempModbus 400011°FRead
AI73Reset RatioModbus 400012; not polled by defaultRead
AI74Max Header TempModbus 400013°FRead
AI75Min Header TempModbus 400014°FRead
AI76Start PercentModbus 400015; not polled by default%Read
AI77Stop PercentModbus 400016; not polled by default%Read
AI78Integral GainModbus 400017; not polled by defaultRead
AI79Header Set ModeModbus 400018; not polled by defaultRead
AI80Derivative GainModbus 400019; not polled by defaultRead
AI81Header Temp BandwidthModbus 400020; not polled by default°FRead
AI82Aux Relay OpenModbus 400021; not polled by default%Read
AI83Aux Relay ModeModbus 400022; not polled by defaultRead
AI84Temp Sensor Fail Mode/Failsafe ModeModbus 400023; not polled by defaultRead
AI85Fault Alarm Relay ModeModbus 400024; not polled by defaultRead
AI86Fault Alarm Clear MethodModbus 400025; not polled by defaultRead
AI87Boiler Operation ModeModbus 400026; not polled by defaultRead
AI88Number Of Combination Mode BoilersModbus 400027; not polled by defaultRead
AI89Max Power InputModbus 400031; not polled by default%Read
AI90Interlock 1 Method (BMS)/Sys Intlk Config (BMSII)Modbus 400032; not polled by defaultRead
AI91Real Time Clock MinutesModbus 400033; not polled by defaultminRead
AI92Real Time Clock HoursModbus 400034; not polled by defaulthRead
AI93Real Time Clock Day of WeekModbus 400035; not polled by defaultdaysRead
AI94Real Time Clock YearModbus 400036; not polled by defaultyearsRead
AI95Real Time Clock Day of MonthModbus 400037; not polled by defaultdaysRead
AI96Real Time Clock MonthModbus 400038; not polled by defaultmonthsRead
AI97Offset Temp Day 1Modbus 400039; not polled by default°FRead
AI98Offset Temp Day 2Modbus 400040; not polled by default°FRead
AI99Offset Temp Day 3Modbus 400041; not polled by default°FRead
AI100Offset Temp Day 4Modbus 400042; not polled by default°FRead
AI101Offset Temp Day 5Modbus 400043; not polled by default°FRead
AI102Offset Temp Day 6Modbus 400044; not polled by default°FRead
AI103Offset Temp Day 7Modbus 400045; not polled by default°FRead
AI104Offset On Time Day 1 – MinutesModbus 400046; not polled by defaultminRead
AI105Offset On Time Day 2 – MinutesModbus 400047; not polled by defaultminRead
AI106Offset On Time Day 3 – MinutesModbus 400048; not polled by defaultminRead
AI107Offset On Time Day 4 – MinutesModbus 400049; not polled by defaultminRead
AI108Offset On Time Day 5 – MinutesModbus 400050; not polled by defaultminRead
AI109Offset On Time Day 6 – MinutesModbus 400051; not polled by defaultminRead
AI110Offset On Time Day 7 – MinutesModbus 400052; not polled by defaultminRead
AI111Offset On Time Day 1 – HoursModbus 400053; not polled by defaulthRead
AI112Offset On Time Day 2 – HoursModbus 400054; not polled by defaulthRead
AI113Offset On Time Day 3 – HoursModbus 400055; not polled by defaulthRead
AI114Offset On Time Day 4 – HoursModbus 400056; not polled by defaulthRead
AI115Offset On Time Day 5 – HoursModbus 400057; not polled by defaulthRead
AI116Offset On Time Day 6 – HoursModbus 400058; not polled by defaulthRead
AI117Offset On Time Day 7 – HoursModbus 400059; not polled by defaulthRead
AI118Offset EnableModbus 400060; not polled by defaultRead
AI119Header OffsetModbus 400061; not polled by default°FRead
AI120System Start InterlockModbus 400062; not polled by defaultRead
AI121Offset Off Time Day 1 – MinutesModbus 400071; not polled by defaultminRead
AI122Offset Off Time Day 2 – MinutesModbus 400072; not polled by defaultminRead
AI123Offset Off Time Day 3 – MinutesModbus 400073; not polled by defaultminRead
AI124Offset Off Time Day 4 – MinutesModbus 400074; not polled by defaultminRead
AI125Offset Off Time Day 5 – MinutesModbus 400075; not polled by defaultminRead
AI126Offset Off Time Day 6 – MinutesModbus 400076; not polled by defaultminRead
AI127Offset Off Time Day 7 – MinutesModbus 400077; not polled by defaultminRead
AI128Offset Off Time Day 1 – HoursModbus 400078; not polled by defaulthRead
AI129Offset Off Time Day 2 – HoursModbus 400079; not polled by defaulthRead
AI130Offset Off Time Day 3 – HoursModbus 400080; not polled by defaulthRead
AI131Offset Off Time Day 4 – HoursModbus 400081; not polled by defaulthRead
AI132Offset Off Time Day 5 – HoursModbus 400082; not polled by defaulthRead
AI133Offset Off Time Day 6 – HoursModbus 400083; not polled by defaulthRead
AI134Offset Off Time Day 7 – HoursModbus 400084; not polled by defaulthRead
AI135Indoor Air InputModbus 400086Read
AI136Remote SignalModbus 400087; not polled by defaultRead
AI137RS232 ModeModbus 400088; not polled by defaultRead
AI138RS232 Baud RateModbus 400089; not polled by defaultRead
AI139Number Of Network BoilersModbus 400090; not polled by defaultRead
AI140Min Slave AddressModbus 400091; not polled by defaultRead
AI141Max Slave AddressModbus 400092; not polled by defaultRead
AI142Net Boiler 1 AddressModbus 400093; not polled by defaultRead
AI143Net Boiler 2 AddressModbus 400094; not polled by defaultRead
AI144Net Boiler 3 AddressModbus 400095; not polled by defaultRead
AI145Net Boiler 4 AddressModbus 400096; not polled by defaultRead
AI146Net Boiler 5 AddressModbus 400097; not polled by defaultRead
AI147Net Boiler 6 AddressModbus 400098; not polled by defaultRead
AI148Net Boiler 7 AddressModbus 400099; not polled by defaultRead
AI149Net Boiler 8 AddressModbus 400100; not polled by defaultRead
AI150Net Boiler 9 AddressModbus 400101; not polled by defaultRead
AI151Net Boiler 10 AddressModbus 400102; not polled by defaultRead
AI152Net Boiler 11 AddressModbus 400103; not polled by defaultRead
AI153Net Boiler 12 AddressModbus 400104; not polled by defaultRead
AI154Net Boiler 13 AddressModbus 400105; not polled by defaultRead
AI155Net Boiler 14 AddressModbus 400106; not polled by defaultRead
AI156Net Boiler 15 AddressModbus 400107; not polled by defaultRead
AI157Net Boiler 16 AddressModbus 400108; not polled by defaultRead
AI158Net Boiler 17 AddressModbus 400109; not polled by defaultRead
AI159Net Boiler 18 AddressModbus 400110; not polled by defaultRead
AI160Net Boiler 19 AddressModbus 400111; not polled by defaultRead
AI161Net Boiler 20 AddressModbus 400112; not polled by defaultRead
AI162Net Boiler 21 AddressModbus 400113; not polled by defaultRead
AI163Net Boiler 22 AddressModbus 400114; not polled by defaultRead
AI164Net Boiler 23 AddressModbus 400115; not polled by defaultRead
AI165Net Boiler 24 AddressModbus 400116; not polled by defaultRead
AI166Net Boiler 25 AddressModbus 400117; not polled by defaultRead
AI167Net Boiler 26 AddressModbus 400118; not polled by defaultRead
AI168Net Boiler 27 AddressModbus 400119; not polled by defaultRead
AI169Net Boiler 28 AddressModbus 400120; not polled by defaultRead
AI170Net Boiler 29 AddressModbus 400121; not polled by defaultRead
AI171Net Boiler 30 AddressModbus 400122; not polled by defaultRead
AI172Net Boiler 31 AddressModbus 400123; not polled by defaultRead
AI173Net Boiler 32 AddressModbus 400124; not polled by defaultRead
AI174Network BaudModbus 400125; not polled by defaultRead
AI175Network TimeoutModbus 400126; not polled by defaultRead
AI176Password LoModbus 400127; not polled by defaultRead
AI177Password HiModbus 400128; not polled by defaultRead
AI178Modbus Control TypeModbus 400129; not polled by defaultRead
AI179Modbus Pass-ThruModbus 400130; not polled by defaultRead
AI180Header Dead BandModbus 400131; not polled by default°FRead
AI181Outside Temp Sensor OffsetModbus 400132; not polled by default°FRead
AI182Ramp Up %/MINModbus 400133; not polled by defaultRead
AI183Ramp Down %/MINModbus 400134; not polled by defaultRead
AI184Fault Alarm BoilersModbus 400135; not polled by defaultRead
AI1854 to 20 mA Current OffsetModbus 400136; not polled by defaultRead
AI186Return Sensor OffsetModbus 400137; not polled by defaultRead
AI187Load Start PctModbus 400138; not polled by defaultRead
AI188Load Stop PctModbus 400139; not polled by defaultRead
Object ID lookup: Contemporary Controls BASgatewayLX AERCO BMS/BMSII 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 AERCO BMS / BMS II Boiler Management System via BASgatewayLX 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 Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX

How many BACnet points does the Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX have?

This list has 188 BACnet objects: 173 analog inputs, 15 binary inputs. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX BACnet points are writable?

None of the listed objects are marked writable in the source documentation. The source has no read/write column, so this is inferred from object type.

Where is the official Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX BACnet documentation?

The source is BASgatewayLX Modbus device profile Aerco_Boiler_Mgmt_System_BMS_BMSII (Aerco_Boiler_Mgmt_System_BMS_BMSII_LX.csv), published free by Contemporary Controls at https://www.ccontrols.com/support/dp/Aerco_Boiler_Mgmt_System_BMS_BMSII_LX.zip.

What are the minimum BACnet points to integrate the Contemporary Controls AERCO BMS / BMS II Boiler Management System via BASgatewayLX?

Start with AI 1 Header Temperature (Header temperature); AI 5 Header Set Temperature (Header setpoint); AI 4 Fire Rate Out (Fire rate out, %); AI 7 Total Boilers Fired (Boilers firing); AI 8 Total Boilers On Line (Boilers on line); AI 2 Outside Air Temperature (Outside air temperature); BI 10 Fault/Message Code Bit 1 = Header Sensor Error (Header sensor error); BI 58 Bit map BMS II Only Bit 1 = Fault Relay (Fault relay (BMS II only)).

How do I check these points on the real AERCO BMS / BMS II Boiler Management System via BASgatewayLX?

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 Contemporary Controls BACnet points lists

Source: BASgatewayLX Modbus device profile Aerco_Boiler_Mgmt_System_BMS_BMSII · Aerco_Boiler_Mgmt_System_BMS_BMSII_LX.csv. Object names, instances and units are reproduced as published; descriptions are our own.