Home
BACnet points lists
iSMA CONTROLLI
iSMA-B-FCU fan coil controller (default application)

Fan coil unit controller · BACnet points list

iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application) BACnet points list

Updated 12 November 2026Unofficial source

Short answer

The iSMA-B-FCU ships with a ready-made fan coil application (2- or 4-pipe, digital or analog valve control, 3-speed or analog fan) that exposes a fixed set of BACnet Analog Value and Binary Value objects, the same data as its Modbus registers. The BMS can set occupancy mode, setpoint, fan mode and FCU mode, write the room temperature, and read the effective setpoint, valve and fan outputs and sensor values. Up to five slave FCUs can follow one master over BACnet.

This page lists 119 BACnet objects for the iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application) — 86 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from a copy of iSMA CONTROLLI’s documentation hosted by Innon (iSMA distributor), not by iSMA CONTROLLI itself, so treat it as unofficial.

Manufacturer: iSMA CONTROLLI
Model: iSMA-B-FCU fan coil controller (default application)
Equipment: Fan coil unit controller
Equipment type: VAV boxes & fan coils
BACnet objects: 119 (86 writable)
Transport: BACnet MS/TP
Firmware: Default application 2.0 (App_version default)
Default device instance: 826 followed by the 3-digit MAC address (MAC 83 = 826083)
Also known as: iSMA-B-FCU, iSMA-B-FCU-HH, iSMA-B-FCU-HL, iSMA-B-FCU-LL, DMP241en
Source document: iSMA-B-FCU Application User Manual · DMP241en · rev. 1st Issue rev. 5, 02/2022 (unofficial copy, hosted by Innon (iSMA distributor))

Download CSV 119 rows Download EDE B.I.G.-EU JSON Source PDF (unofficial copy) ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

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

BMS integration notes: iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application)

Integration in brief

Use the default application as shipped: write Occupancy_Mode, Setpoint, Fan_Mode and FCU_Mode from the BMS, and read Effective Setpoint, Occupancy Status, Fan Status and the valve outputs. If the room temperature comes from the BMS, write it to Net_Temperature. Only the master FCU of a group should be controlled from the BMS; slaves follow it.

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	Occupancy_Mode	0 unoccupied, 1 occupied, 2 standby	Write
AV 4	FCU_Mode	0 off, 1 auto, 2 heat, 3 cool, 4 fan only	Write
AV 3	Fan_Mode	0 off, 1-3 manual speed, 4 auto	Write
AV 1	Setpoint	Room temperature setpoint	Write
AV 100	Effective Setpoint	Setpoint in use after offsets	Read
AV 101	Occupancy Status	0 unocc, 1 occ, 2 standby, 3 forced occupied	Read
AV 102	Fan Status	0 off, 1-3 manual speed, 4-6 auto speed	Read
AV 104	Cv	Room temperature used for control	Read
AV 110	Heating_Valve	Heating valve output, %	Read
AV 111	Coolling_Valve	Cooling valve output, %	Read

Sensors & values from the BMS

Net_Temperature (AV 6) takes a room temperature from the network as the control value source.

Network setup

The MS/TP MAC address is set on the DIP switches (binary weights).
Device instance = 826 followed by the 3-digit MAC address (MAC 83 gives 826083).
For master/slave rooms, give slaves the BACnet device IDs from the auto-binding table, or set Remote_SlaveN_Device_ID and Local_Remote_Auto_Binding.
Only the master works with the room panel and the BMS; up to 5 slaves follow it.

Watch out for

Manual override objects (valve/fan manual value plus the matching enable BV) take outputs out of automatic control.
Check value scaling: the table defaults look like tenths (210 = 21.0 °C).

iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application) 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.

119 of 119 shown

Type

AnalogBinary

Access

Units

Show

iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application) BACnet Points List
			Description			States
AVmin	0	Occupancy_Mode	Occupancy mode command		Write	0=Unoccupied, 1=Occupied, 2=Standby
AVmin	1	Setpoint	User temperature setpoint	°C	Write
AV	2	Setpoint_Offset	User setpoint offset	°C	Write
AVmin	3	Fan_Mode	Fan mode command		Write	0=Off, 1=Speed 1 (manual), 2=Speed 2 (manual), 3=Speed 3 (manual), 4=Auto
AVmin	4	FCU_Mode	Fan coil operating mode		Write	0=Off, 1=Auto, 2=Heating only, 3=Cooling only, 4=Fan only
AV	5	Setpoint_Offset_Range	Allowed setpoint offset range (+/-)	°C	Write
AV	6	Net_Temperature	Room temperature written from the network (control value source)	°C	Write
AV	10	Heating_Cooling_Switch_Diff	Heating/cooling changeover differential	°C	Write
AV	11	Unoccupied_Offset	Setpoint offset in unoccupied mode	°C	Write
AV	12	Standby_Offset	Setpoint offset in standby mode	°C	Write
AV	13	Occupancy_Time_Remote_Trigger	Forced occupied time for I1 button / room panel	min	Write
AV	14	Occupancy_Time_Presence_Sensor	Forced occupied time for I2 presence sensor	min	Write
AV	15	PWM_Heating_Period	Heating valve PWM period	s	Write
AV	16	PWM_Cooling_Period	Cooling valve PWM period	s	Write
AV	17	Fan_Scale	Fan control scale (temperature error for 100 %)	°C	Write
AV	18	Fan_Off_Threshold	Fan off threshold	%	Write
AV	19	Fan_Speed_1_Threshold	Fan speed 1 threshold	%	Write
AV	20	Fan_Speed_2_Threshold	Fan speed 2 threshold	%	Write
AV	21	Fan_Speed_3_Threshold	Fan speed 3 threshold	%	Write
AV	22	Fan_Off_Delay	Fan switch-off delay	s	Write
AV	23	Fan_Soft_Start_Time	Fan soft start time	s	Write
AV	24	Kp	PI proportional gain		Write
AV	25	Ti	PI integral time	min	Write
AV	26	Heating_Binary_Diff	1st stage heating thermostat differential	°C	Write
AV	27	Cooling_Binary_Diff	1st stage cooling thermostat differential	°C	Write
AV	28	Second_Stage_Threshold_Binary	2nd stage shift, digital control mode	°C	Write
AV	29	Second_Stage_Diff_Binary	2nd stage differential, digital control mode	°C	Write
AV	30	Second_Stage_Threshold_Analog	2nd stage shift, analog control mode	%	Write
AV	31	Second_Stage_Diff_Analog	2nd stage differential, analog control mode	%	Write
AV	32	Supply_Temperature_Low_Limit	Supply air low limit	°C	Write
AV	33	Supply_Temperature_High_Limit	Supply air high limit	°C	Write
AV	34	Supply_Limits_Time	Supply air limit function time	s	Write
AV	35	Window_Status_Delay	Open window function delay	s	Write
AV	36	Return_To_Space_Time	Return-to-space sensor function time	s	Write
AV	37	FCU_Test_Mode	Test mode		Write	0=Auto operation, 1=Heating test, 2=Cooling test
AV	38	Fan_Soft_Start_Value	Analog fan start value	%	Write
AV	39	Valves_Dead_Band	Valve temperature dead band	°C	Write
AV	40	Return_Temperature_Offset	Return sensor correction	°C	Write
AV	41	Supply_Temperature_Offset	Supply sensor correction	°C	Write
AV	42	Space_Temperature_Offset	Space sensor correction	°C	Write
AV	43	S1_Sensor_Type	S1 input sensor type		Write	0=Voltage, 1=10K3A1 NTC, 2=10K4A1 NTC, 3=10K NTC, 4=20K6A1 NTC, 5=2.2K3A1 NTC, 6=3K3A1 NTC, 7=30K6A1 NTC, 8=SIE1 NTC, 9=TAC1 NTC, 10=SAT1 NTC
AV	44	S2_Sensor_Type	S2 input sensor type		Write	0=Voltage, 1=10K3A1 NTC, 2=10K4A1 NTC, 3=10K NTC, 4=20K6A1 NTC, 5=2.2K3A1 NTC, 6=3K3A1 NTC, 7=30K6A1 NTC, 8=SIE1 NTC, 9=TAC1 NTC, 10=SAT1 NTC
AV	45	S3_Sensor_Type	S3 input sensor type		Write	0=Voltage, 1=10K3A1 NTC, 2=10K4A1 NTC, 3=10K NTC, 4=20K6A1 NTC, 5=2.2K3A1 NTC, 6=3K3A1 NTC, 7=30K6A1 NTC, 8=SIE1 NTC, 9=TAC1 NTC, 10=SAT1 NTC
AV	46	Heating_Valve_Manual_Value	Heating valve manual override value	%	Write
AV	47	Cooling_Valve_Manual_Value	Cooling valve manual override value	%	Write
AV	48	Fan_Valve_Manual_Value	Fan output manual override value	%	Write
AV	50	LCD_Panel_Temperature_Offset	Room panel temperature correction	°C	Write
AV	51	LCD_Setpoint_Step	Room panel setpoint step	°C	Write
AV	52	LCD_Setpoint_Low_Limit	Room panel setpoint low limit	°C	Write
AV	53	LCD Setpoint High Limit	Room panel setpoint high limit	°C	Write
AV	54	Remote_Slave1_Device_ID	Slave 1 BACnet device ID		Write
AV	56	Remote_Slave2_Device_ID	Slave 2 BACnet device ID		Write
AV	58	Remote_Slave3_Device_ID	Slave 3 BACnet device ID		Write
AV	60	Remote_Slave4_Device_ID	Slave 4 BACnet device ID		Write
AV	62	Remote_Slave5_Device_ID	Slave 5 BACnet device ID		Write
AV	64	Slaves_Ping_Frequency	Slave ping interval	min	Write
AVmin	100	Effective Setpoint	Effective setpoint in use	°C	Read
AVmin	101	Occupancy Status	Occupancy status		Read	0=Unoccupied, 1=Occupied, 2=Standby, 3=Forced occupied
AVmin	102	Fan Status	Fan status		Read	0=Off, 1=Speed 1 (manual), 2=Speed 2 (manual), 3=Speed 3 (manual), 4=Speed 1 (auto), 5=Speed 2 (auto), 6=Speed 3 (auto)
AV	103	Fan Type	Fan type		Read	0=Analog, 1=Speed 1, 2=Speed 2, 3=Speed 3
AVmin	104	Cv	Temperature control value	°C	Read
AV	105	Dip_Switch_Configuration	CFG DIP switch status bits		Read
AV	106	App_version	Application version		Read
AVmin	110	Heating_Valve	Heating valve output (analog or triac PWM)	%	Read
AVmin	111	Coolling_Valve	Cooling valve output (analog or triac PWM)	%	Read
AV	112	Fan Value	Fan output (analog % or speed step)	%	Read
AV	113	S1_Return_Temperature	S1 return temperature	°C	Read
AV	114	S2_Supply_Temperature	S2 supply temperature	°C	Read
AV	115	S3_Space_Temperature	S3 space temperature	°C	Read
AV	120	LCD Panel Temperature	Room panel temperature	°C	Read
AV	121	LCD Panel Humidity	Room panel humidity	%	Read
AV	122	LCD Panel CO2	Room panel CO2	ppm	Read
BV	0	Offset In Occupied Only	Apply setpoint offset only when occupied		Write	0=False, 1=True
BV	1	Fan Heating Occupied Active	Fan low speed with no demand, heating occupied		Write	0=False, 1=True
BV	2	Fan Cooling Occupied Active	Fan low speed with no demand, cooling occupied		Write	0=False, 1=True
BV	3	Return_To_Space_Enable	Return-to-space sensor function enable		Write	0=False, 1=True
BV	4	HTG Relay Enable	Enable O4 heating relay		Write	0=False, 1=True
BV	5	CLG Relay Enable	Enable O5 cooling relay		Write	0=False, 1=True
BV	6	I1_Remote_Occ_Trigger_Invert	Invert I1 occupancy trigger input		Write	0=False, 1=True
BV	7	I2_Presence_Sensor_Invert	Invert I2 presence input		Write	0=False, 1=True
BV	8	I3_Window_Contact_Invert	Invert I3 window contact input		Write	0=False, 1=True
BV	9	Local_Remote_Auto_Binding	Slave ID source (auto binding or network)		Write	0=False, 1=True
BV	10	Heating_Valve_Manual_Enable	Heating valve manual override enable		Write	0=False, 1=True
BV	11	Cooling_Valve_Manual_Enable	Cooling valve manual override enable		Write	0=False, 1=True
BV	12	HTG_Relay_Manual_Enable	Heating relay manual override enable		Write	0=False, 1=True
BV	13	CLG_Relay_Manual_Enable	Cooling relay manual override enable		Write	0=False, 1=True
BV	14	Fan_Output_Manual_Enable	Fan output manual override enable		Write	0=False, 1=True
BV	15	LCD Submenu Icons Hidden	Hide room panel submenu icons		Write	0=False, 1=True
BV	16	LCD Temperature Active	Room panel option: temperature active		Write	0=False, 1=True
BV	17	LCD Setpoint Active	Room panel option: setpoint active		Write	0=False, 1=True
BV	18	LCD Setpoint Editable	Room panel option: setpoint editable		Write	0=False, 1=True
BV	19	LCD Setpoint Fast Edit Mode	Room panel option: setpoint fast edit mode		Write	0=False, 1=True
BV	20	LCD Fan Visable	Room panel option: fan visible		Write	0=False, 1=True
BV	21	LCD Fan Editable	Room panel option: fan editable		Write	0=False, 1=True
BV	22	LCD Fan Fast Edit Mode	Room panel option: fan fast edit mode		Write	0=False, 1=True
BV	23	LCD Occupancy Visable	Room panel option: occupancy visible		Write	0=False, 1=True
BV	24	LCD Occupancy Editable	Room panel option: occupancy editable		Write	0=False, 1=True
BV	25	LCD Occupancy Fast Edit Mode	Room panel option: occupancy fast edit mode		Write	0=False, 1=True
BV	26	LCD Humidity Active	Room panel option: humidity active		Write	0=False, 1=True
BV	27	LCD CO2 Active	Room panel option: co2 active		Write	0=False, 1=True
BV	28	HTG_Relay_Manual_State	Heating relay state in manual override		Write	0=False, 1=True
BV	29	CLG_Relay_Manual_State	Cooling relay state in manual override		Write	0=False, 1=True
BV	64	Occupied Forced	Forced occupied mode active		Read	0=False, 1=True
BV	80	Heating_Second_Stage	Heating 2nd stage active		Read	0=False, 1=True
BV	81	Cooling_Second_Stage	Cooling 2nd stage active		Read	0=False, 1=True
BV	82	I1_Remote_Occuapancy_Trigger	I1 occupancy trigger input state		Read	0=False, 1=True
BV	83	I2_Presence_Sensor_Card_Holder	I2 presence / card holder input state		Read	0=False, 1=True
BV	84	I3_Window_Conntact	I3 window contact input state		Read	0=False, 1=True
BV	85	I4_Occupancy_LED	I4 occupancy LED state		Read	0=False, 1=True
BV	96	Slave1_Active	Slave 1 connected		Read	0=False, 1=True
BV	97	Slave2_Active	Slave 2 connected		Read	0=False, 1=True
BV	98	Slave3_Active	Slave 3 connected		Read	0=False, 1=True
BV	99	Slave4_Active	Slave 4 connected		Read	0=False, 1=True
BV	100	Slave5_Active	Slave 5 connected		Read	0=False, 1=True
BV	101	Slave1_Window_Status	Slave 1 window input (I3) state		Read	0=False, 1=True
BV	102	Slave2_Window_Status	Slave 2 window input (I3) state		Read	0=False, 1=True
BV	103	Slave3_Window_Status	Slave 3 window input (I3) state		Read	0=False, 1=True
BV	104	Slave4_Window_Status	Slave 4 window input (I3) state		Read	0=False, 1=True
BV	105	Slave5_Window_Status	Slave 5 window input (I3) state		Read	0=False, 1=True

Object ID lookup: iSMA CONTROLLI iSMA-B-FCU fan coil controller point IDs by name

AV0Occupancy_Mode
AV1Setpoint
AV2Setpoint_Offset
AV3Fan_Mode
AV4FCU_Mode
AV5Setpoint_Offset_Range
AV6Net_Temperature
AV10Heating_Cooling_Switch_Diff
AV11Unoccupied_Offset
AV12Standby_Offset
AV13Occupancy_Time_Remote_Trigger
AV14Occupancy_Time_Presence_Sensor
AV15PWM_Heating_Period
AV16PWM_Cooling_Period
AV17Fan_Scale
AV18Fan_Off_Threshold
AV19Fan_Speed_1_Threshold
AV20Fan_Speed_2_Threshold
AV21Fan_Speed_3_Threshold
AV22Fan_Off_Delay
AV23Fan_Soft_Start_Time
AV24Kp
AV25Ti
AV26Heating_Binary_Diff
AV27Cooling_Binary_Diff
AV28Second_Stage_Threshold_Binary
AV29Second_Stage_Diff_Binary
AV30Second_Stage_Threshold_Analog
AV31Second_Stage_Diff_Analog
AV32Supply_Temperature_Low_Limit
AV33Supply_Temperature_High_Limit
AV34Supply_Limits_Time
AV35Window_Status_Delay
AV36Return_To_Space_Time
AV37FCU_Test_Mode
AV38Fan_Soft_Start_Value
AV39Valves_Dead_Band
AV40Return_Temperature_Offset
AV41Supply_Temperature_Offset
AV42Space_Temperature_Offset
AV43S1_Sensor_Type
AV44S2_Sensor_Type
AV45S3_Sensor_Type
AV46Heating_Valve_Manual_Value
AV47Cooling_Valve_Manual_Value
AV48Fan_Valve_Manual_Value
AV50LCD_Panel_Temperature_Offset
AV51LCD_Setpoint_Step
AV52LCD_Setpoint_Low_Limit
AV53LCD Setpoint High Limit
AV54Remote_Slave1_Device_ID
AV56Remote_Slave2_Device_ID
AV58Remote_Slave3_Device_ID
AV60Remote_Slave4_Device_ID
AV62Remote_Slave5_Device_ID
AV64Slaves_Ping_Frequency
AV100Effective Setpoint
AV101Occupancy Status
AV102Fan Status
AV103Fan Type
AV104Cv
AV105Dip_Switch_Configuration
AV106App_version
AV110Heating_Valve
AV111Coolling_Valve
AV112Fan Value
AV113S1_Return_Temperature
AV114S2_Supply_Temperature
AV115S3_Space_Temperature
AV120LCD Panel Temperature
AV121LCD Panel Humidity
AV122LCD Panel CO2
BV0Offset In Occupied Only
BV1Fan Heating Occupied Active
BV2Fan Cooling Occupied Active
BV3Return_To_Space_Enable
BV4HTG Relay Enable
BV5CLG Relay Enable
BV6I1_Remote_Occ_Trigger_Invert
BV7I2_Presence_Sensor_Invert
BV8I3_Window_Contact_Invert
BV9Local_Remote_Auto_Binding
BV10Heating_Valve_Manual_Enable
BV11Cooling_Valve_Manual_Enable
BV12HTG_Relay_Manual_Enable
BV13CLG_Relay_Manual_Enable
BV14Fan_Output_Manual_Enable
BV15LCD Submenu Icons Hidden
BV16LCD Temperature Active
BV17LCD Setpoint Active
BV18LCD Setpoint Editable
BV19LCD Setpoint Fast Edit Mode
BV20LCD Fan Visable
BV21LCD Fan Editable
BV22LCD Fan Fast Edit Mode
BV23LCD Occupancy Visable
BV24LCD Occupancy Editable
BV25LCD Occupancy Fast Edit Mode
BV26LCD Humidity Active
BV27LCD CO2 Active
BV28HTG_Relay_Manual_State
BV29CLG_Relay_Manual_State
BV64Occupied Forced
BV80Heating_Second_Stage
BV81Cooling_Second_Stage
BV82I1_Remote_Occuapancy_Trigger
BV83I2_Presence_Sensor_Card_Holder
BV84I3_Window_Conntact
BV85I4_Occupancy_LED
BV96Slave1_Active
BV97Slave2_Active
BV98Slave3_Active
BV99Slave4_Active
BV100Slave5_Active
BV101Slave1_Window_Status
BV102Slave2_Window_Status
BV103Slave3_Window_Status
BV104Slave4_Window_Status
BV105Slave5_Window_Status

Integration notes

The manual lists App_status (application diagnostics) as BACnet Device object property 5002, not as an object; it is left out here.
Default values in the table look scaled x10 (Setpoint 210 for 21.0 °C; Fan_Scale default 30 while the text says 3 °C). Check whether the live BACnet values are scaled before writing.
AV 29 is printed wrapped as 'Second_Stage_Diff / Binary'; it is listed as Second_Stage_Diff_Binary to match AV 31 Second_Stage_Diff_Analog.
Names are kept as printed, including spelling slips (Coolling_Valve, Visable, Occuapancy, Conntact) and the few names printed with spaces.
The MAC address is set with DIP switches; master/slave grouping works only over BACnet.

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 iSMA-B-FCU fan coil controller (default application) 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 iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application)

How many BACnet points does the iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application) have?

This list has 119 BACnet objects: 72 analog values, 47 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application) BACnet points are writable?

86 of the 119 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 iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application) BACnet documentation?

iSMA CONTROLLI does not publish it on its own website. This list comes from iSMA-B-FCU Application User Manual (DMP241en), revision 1st Issue rev. 5, 02/2022, a copy hosted by Innon (iSMA distributor) at https://downloads.innon.com/hubfs/downloads.innon.com/iSMA/iSMA-B-FCU/Manuals/iSMA_B_FCU_Application_Manual.pdf. Ask iSMA CONTROLLI or its representative for the current revision.

What are the minimum BACnet points to integrate the iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application)?

Start with AV 0 Occupancy_Mode (0 unoccupied, 1 occupied, 2 standby); AV 4 FCU_Mode (0 off, 1 auto, 2 heat, 3 cool, 4 fan only); AV 3 Fan_Mode (0 off, 1-3 manual speed, 4 auto); AV 1 Setpoint (Room temperature setpoint); AV 100 Effective Setpoint (Setpoint in use after offsets); AV 101 Occupancy Status (0 unocc, 1 occ, 2 standby, 3 forced occupied); AV 102 Fan Status (0 off, 1-3 manual speed, 4-6 auto speed); AV 104 Cv (Room temperature used for control); AV 110 Heating_Valve (Heating valve output, %); AV 111 Coolling_Valve (Cooling valve output, %).

Can the BMS supply sensor values to the iSMA CONTROLLI iSMA-B-FCU fan coil controller (default application)?

Net_Temperature (AV 6) takes a room temperature from the network as the control value source.

How do I check these points on the real iSMA-B-FCU fan coil controller (default application)?

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.

Source: iSMA-B-FCU Application User Manual · DMP241en · rev. 1st Issue rev. 5, 02/2022. Object names, instances and units are reproduced as published; descriptions are our own.