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ECY-303 preloaded applications (rooftop unit)

Rooftop unit controller (preloaded application) · BACnet points list

Distech Controls ECY-303 preloaded applications (rooftop unit) BACnet points list

Updated 7 November 2026

Short answer

The ECY-303 is a Distech Controls Eclypse connected equipment controller that ships with preloaded, configurable rooftop unit applications (cooling and heating stages, heat pump reversing valve, economizer, humidification and dehumidification). The program exposes a fixed set of input, output and value objects. The wiring diagrams show it on Ethernet or on a BACnet MS/TP network.

This page lists 165 BACnet objects for the Distech Controls ECY-303 preloaded applications (rooftop unit) — 98 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Distech Controls’s own free documentation, linked below.

Manufacturer: Distech Controls
Model: ECY-303 preloaded applications (rooftop unit)
Equipment: Rooftop unit controller (preloaded application)
Equipment type: Rooftop units, AHUs & DOAS
BACnet objects: 165 (98 writable)
Transport: BACnet IP, BACnet MS/TP
Firmware: Not stated
Also known as: ECY-303, Eclypse Connected Equipment Controller, ECY-303 Roof Top Unit
Source document: ECY-303 Preloaded Applications User Guide · ECY-303 Preloaded Apps_UG_11_EN · rev. 2017-06 (version 1.1)

Download CSV 165 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 Distech Controls’s current documentation and the live device before use. Not official Distech Controls information. Terms of use.

BMS integration notes: Distech Controls ECY-303 preloaded applications (rooftop unit)

Integration in brief

Command occupancy with MV 1 and the mode with MV 2, write the occupied setpoints AV 40 and AV 41, and read back MV 15, MV 14, AV 1 and the fan status BV 12. Watch BV 17 for the discharge low-limit alarm.

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
MV 1	OccupancyCmd	Occupancy command from the BMS	Write
MV 2	HvacModeCmd	HVAC mode command	Write
MV 3	FanModeCmd	Fan mode (on when occupied, or auto)	Write
AV 40	OccCoolSp	Occupied cooling setpoint	Write
AV 41	OccHeatSp	Occupied heating setpoint	Write
MV 15	OccupancyStatus	Effective occupancy state	Read
MV 14	HvacModeStatus	Actual HVAC mode	Read
AV 1	SpaceTemp	Space temperature used for control	Read
BV 12	FanStatus	Supply fan status	Read
BV 17	LowLimitAlarm	Discharge air low-limit alarm	Read

Enable & remote start

MV 1 OccupancyCmd takes occupancy from the BMS and is combined with local occupancy detection into MV 15 OccupancyStatus. MV 2 HvacModeCmd forces the mode when it is not Auto.

Sensors & values from the BMS

The guide says the measured values can be overridden through the BACnet priority array for testing.

Network setup

The configuration pages are reached through the controller's IP address or factory host name.

Watch out for

Units in this edition are imperial (°F); use the SI edition for metric sites.
Configuration objects (input types, output assignment) are commissioning settings; don't write them cyclically.

Distech Controls ECY-303 preloaded applications (rooftop unit) 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.

165 of 165 shown

Type

Multi-state

Access

Units

Show

Distech Controls ECY-303 preloaded applications (rooftop unit) BACnet Points List
			Description			States
AI	1	UI1	Range 0 to 55000 ohms	Ω	Read
AI	2	UI2	Range 0 to 55000 ohms	Ω	Read
AI	3	UI3	Range 0 to 55000 ohms	Ω	Read
AI	4	UI4	Range 0 to 55000 ohms	Ω	Read
AI	5	UI5	Range 0 to 55000 ohms	Ω	Read
AI	6	UI6	Range 0 to 10 volts	V	Read
AI	7	UI7	Range 0 to 10 volts	V	Read
AI	8	UI8	Range 0 to 10 volts	V	Read
AI	5001	ComSensor1Temp	Allure EC-Smart-Vue reading; Range 15 to 105°F	°F	Read
AI	5002	ComSensor1Humid	Allure EC-Smart-Vue reading; Range 0 to 100 %RH	%RH	Read
AI	5003	ComSensor1CO2	Allure EC-Smart-Vue reading; Range 0 to 200 ppm	ppm	Read
AO	6	AO6	Range 0 to 100%	%	Write
AO	7	AO7	Range 0 to 100%	%	Write
AO	8	AO8	Range 0 to 100%	%	Write
BI	5004	ComSensor1Motion	Allure EC-Smart-Vue reading; Default Inactive		Read	Active/Inactive
AVmin	1	SpaceTemp	Range 15 to 105°F	°F	Read
AV	2	SetPtOffset	Range - AV87 to AV87	Δ°F	Read
AV	3	ReturnTemp	Range 0 to 150°F	°F	Read
AV	4	DischargeTemp	Range 0 to 150°F	°F	Read
AV	5	FanCurrent	Range AV44 to AV45	A	Read
AV	6	SpaceCO2	Range 250 ppm to AV56	ppm	Read
AV	7	ReturnCO2	Range 250 ppm to AV56	ppm	Read
AV	8	OutdoorTemp	Range -55 to 150°F	°F	Read
AV	9	ReturnHumidity	Range 5 to 100%RH	%RH	Read
AV	10	DischargeHumidity	Range 5 to 100%RH	%RH	Read
AV	11	SpaceHumidity	Range 5 to 100%RH	%RH	Read
AV	12	OutdoorHumidity	Range 5 to 100%RH	%RH	Read
AV	13	Elevation		ft	Write
AV	14	OptStartCoolFactor		min	Write
AV	15	OptStartHeatFactor		min	Write
AV	16	Shedding	Range 0 to 100%	%	Write
AV	17	SingleSP		°F	Write
AV	18	SingleSPHeatDB	Range <0	Δ°F	Write
AV	19	SingleSPCoolDB	Range >0	Δ°F	Write
AV	20	PropHeat	Range 0 to 100%	%	Read
AV	21	Humidifier	Range 0 to 100%	%	Read
AV	22	Dampers	Range 0 to 100%	%	Read
AV	23	OptStartMaxStartupTime		min	Write
AV	24	OptStartFactorWeight	Range 1 to 100%	%	Write
AV	26	CoolStgOnDelay		s	Write
AV	27	CoolStgOffDelay		s	Write
AV	28	HeatStgOnDelay		s	Write
AV	29	HeatStgOffDelay		s	Write
AV	30	DampersDischAirSP	Range 40 to 75°F	°F	Write
AV	31	EquipEnableDelay		s	Write
AV	32	MinDamperPos	Range 0 to 100%	%	Write
AV	33	MinDamperCO2	Range 0% to AV32	%	Write
AV	34	FanStartDelay		s	Write
AV	35	FanStopDelay		s	Write
AV	36	ActCoolSp		°F	Read
AV	37	ActHeatSp		°F	Read
AV	38	UnoccCoolSp		°F	Write
AV	39	StandbyCoolSp		°F	Write
AVmin	40	OccCoolSp		°F	Write
AVmin	41	OccHeatSp		°F	Write
AV	42	StandbyHeatSp		°F	Write
AV	43	UnoccHeatSp		°F	Write
AV	44	MinFanCurrent		A	Write
AV	45	MaxFanCurrent		A	Write
AV	46	ChgOverDelay		min	Write
AV	47	BypassTime		min	Write
AV	48	MaxOatHeat		°F	Write
AV	49	MinOatHeat		°F	Write
AV	50	EffectSp		°F	Read
AV	51	TempErr		Δ°F	Read
AV	52	CO2Setpoint		ppm	Write
AV	53	SpaceHumiditySP	Range 5 to 55%RH	%RH	Write
AV	54	DehumiditySP	Range 40 to 95%RH	%RH	Write
AV	55	DischHumiditySP	Range 50 to 95%RH	%RH	Write
AV	56	MaxRangeCO2		ppm	Write
AV	57	MinRangeCO2		ppm	Write
AV	58	ComSensorSpOffset	Range - AV87 to AV87	Δ°F	Read
AV	59	FanOnSetpoint	Range >0A	A	Write
AV	60	FanOffSetpoint		A	Write
AV	61	OutdoorEnthalpy		Btu/lb	Read
AV	62	ReturnEnthalpy		Btu/lb	Read
AV	63	HoldTime		s	Write
AV	64	EconEnthalpySP		Btu/lb	Write
AV	65	PwmPeriod	Range 10 to 240s	s	Write
AV	66	EconMaxEnthalpySP		Btu/lb	Write
AV	67	EconMaxOutTemp		Btu/lb	Write
AV	68	CoolingStgsLoad	Range 0 to 100%	%	Read
AV	69	HeatingStgsLoad	Range 0 to 100%	%	Read
AV	75	ComSensorMinCoolSP		°F	Write
AV	76	ComSensorMaxCoolSP		°F	Write
AV	77	ComSensorMinHeatSP		°F	Write
AV	78	ComSensorMaxHeatSP		°F	Write
AV	79	DischTempCoolSP	Range 40 to 65°F	°F	Write
AV	80	DischTempCoolDB	Range 2 to 10°F	Δ°F	Write
AV	81	DischTempHeatSP	Range 80 to 150°F	°F	Write
AV	82	DischTempHeatDB	Range 2 to 30 °F	Δ°F	Write
AV	83	ExhaustStartSP	Range 0 to 100%	%	Write
AV	84	ExhaustStopSP	Range 0 to 100%	%	Write
AV	85	InitStartDelay		s	Write
AV	86	DischTempLowLimitSP	Range 32 to 45°F	°F	Write
AV	87	SpOffsetRange	Range 0 to 10°F	Δ°F	Write
AV	88	SpaceTempOffset	Range -10 to 10 °F	Δ°F	Write
AV	89	ReturnTempOffset	Range -10 to 10 °F	Δ°F	Write
AV	90	DischTempOffset	Range -10 to 10 °F	Δ°F	Write
AV	100	AppVersion			Read
BV	1	Cool1	Default Off		Read	On/Off
BV	2	Cool2	Default Off		Read	On/Off
BV	3	Cool3	Default Off		Read	On/Off
BV	4	Cool4	Default Off		Read	On/Off
BV	5	Heat1	Default Off		Read	On/Off
BV	6	Heat2	Default Off		Read	On/Off
BV	7	Heat3	Default Off		Read	On/Off
BV	8	MinPosEnable	Default Off		Read	On/Off
BV	9	ReversingValve	Default Off		Read	On/Off
BV	10	PowerExhaust	Default Off		Read	On/Off
BV	11	OptStartEnableUpdate	Default Enable		Write	Enable/Disable
BVmin	12	FanStatus	Default Off		Read	On/Off
BV	13	EconEquip	Default No		Read	Yes/No
BV	14	EnableDehumid	Default Disable		Write	Enable/Disable
BV	15	EnableMinPosStandby	Default Disable		Write	Enable/Disable
BV	16	GasHeating	Default Electric		Write	Gas/Electric
BVmin	17	LowLimitAlarm	Default Normal		Read	Alarm/Normal
BV	18	LowLimitReset	Default Normal		Write	Reset/Normal
BV	19	EnableOutputs	Default Disable		Write	Enable/Disable
BV	20	LowLimitResetType	Default Auto		Write	Auto/Manual
BV	21	OatHeatEnable	Default Enable		Write	Enable/Disable
BV	22	OatCompEnable	Default Enable		Write	Enable/Disable
BV	23	EconEnable	Default Enable		Write	Enable/Disable
BV	24	RoomOccupancy			Read	Occupied/Unoccupied
BV	25	EnableRoomUnocc	Default Yes		Write	Yes/No
MVmin	1	OccupancyCmd			Write	1=Occupied, 2=Unoccupied, 3=Bypass, 4=Standby
MVmin	2	HvacModeCmd	Default Auto		Write	1=Auto, 2=Heat, 3=MrngWrmUp, 4=Cool, 5=NightPurge, 6=PreCool, 7=Off
MVmin	3	FanModeCmd			Write	1=On, 2=Auto, 3=Off
MV	4	AuxContact	Default Unconfig		Read	1=Active, 2=Inactive, 3=Unconfig
MV	5	EconEnableBI			Read	1=Enable, 2=Disable, 3=Unconfig
MV	6	OccDetection	Default Unconfig		Read	1=Occupied, 2=Unoccupied, 3=Unconfig
MV	7	WindowContact	Default Unconfig		Read	1=Close, 2=Open, 3=Unconfig
MV	8	EcoVueHeatStatus			Read	1=1 Leaf, 2=2 Leaves, 3=3 Leaves, 4=4 Leaves
MV	9	EcoVueCoolStatus			Read	1=1 Leaf, 2=2 Leaves, 3=3 Leaves, 4=4 Leaves
MV	11	SensorTempUnits	Default Deg.F		Write	1=Deg.C, 2=Deg.F
MV	12	SensorsType	Default 10K Type 2		Write	1=10K Type 2, 2=10K Type 3, 3=PT1000, 4=NI1000@0C, 5=NI1000@22C
MV	13	OptStartMode	Default Auto		Write	1=Auto, 2=HeatOnly, 3=CoolOnly, 4=Disable
MVmin	14	HvacModeStatus	Default Auto		Read	1=Auto, 2=Heat, 3=MrngWrmUp, 4=Cool, 5=NightPurge, 6=PreCool, 7=Off
MVmin	15	OccupancyStatus			Read	1=Occupied, 2=Unoccupied, 3=Bypass, 4=Standby
MV	16	ComSensorSpType	Default CoolHeatSP		Write	1=CoolHeatSP, 2=SpOffset, 3=SingleSp
MV	19	ComSensorLock	Default FullAccess		Write	1=FullAccess, 2=Sp&FanMode, 3=SpOnly, 4=NoAccess
MV	20	UI6Range	Default 0-10V		Write	1=0-10V, 2=2-10V, 3=4-20mA, 4=0-5V
MV	21	UI7Range	Default 0-10V		Write	1=0-10V, 2=2-10V, 3=4-20mA, 4=0-5V
MV	22	UI8Range	Default 0-10V		Write	1=0-10V, 2=2-10V, 3=4-20mA, 4=0-5V
MV	24	UI1Config			Write	1=Unconfig, 2=SpaceTemp, 3=FanStatus, 4=OccDetect, 5=AuxiliaryContact, 6=EconEnable, 7=Window
MV	25	UI2Config			Write	1=Unconfig, 2=SpOffset, 3=FanStatus, 4=OccDetect, 5=AuxiliaryContact, 6=EconEnable, 7=Window
MV	26	UI3Config			Write	1=Unconfig, 2=ReturnTemp, 3=FanStatus, 4=OccDetect, 5=AuxiliaryContact, 6=EconEnable, 7=Window
MV	27	UI4Config			Write	1=Unconfig, 2=DischTemp, 3=FanStatus, 4=OccDetect, 5=AuxiliaryContact, 6=EconEnable, 7=Window
MV	28	UI5Config			Write	1=Unconfig, 2=OutdoorTemp, 3=FanStatus, 4=OccDetect, 5=AuxiliaryContact, 6=EconEnable, 7=Window
MV	29	UI6Config			Write	1=Unconfig, 2=FanStatus, 3=ReturnHumid, 4=DischHumid, 5=SpaceHumid, 6=OutdoorHumid
MV	30	UI7Config			Write	1=Unconfig, 2=SpaceCO2, 3=ReturnHumid, 4=DischHumid, 5=SpaceHumid, 6=OutdoorHumid
MV	31	UI8Config			Write	1=Unconfig, 2=ReturnCO2, 3=ReturnHumid, 4=DischHumid, 5=SpaceHumid, 6=OutdoorHumid
MV	32	CoolHeatConfig	Default 2 Cool / 2 Heat		Write	1=1 Cool / 0 Heat, 2=1 Cool / 1 Heat, 3=1 Cool / 2 Heat, 4=1 Cool / 3 Heat, 5=2 Cool / 0 Heat, 6=2 Cool / 1 Heat, 7=2 Cool / 2 Heat, 8=2 Cool / 3 Heat, 9=3 Cool / 0 Heat, 10=3 Cool / 1 Heat, 11=3 Cool / 2 Heat, 12=3 Cool / 3 Heat, 13=4 Cool / 0 Heat, 14=4 Cool / 1 Heat, 15=4 Cool / 2 Heat, 16=4 Cool / 3 Heat
MV	33	RevValveConfig	Default Unconfig		Write	1=Unconfig, 2=Cooling, 3=Heating
MV	34	PropHeatConfig			Write	1=Unconfig, 2=Analog 0-10V, 3=Analog 2-10V, 4=PWM
MV	35	DampersConfig			Write	1=Unconfig, 2=Analog 0-10V, 3=Analog 2-10V, 4=Analog 0-10V PE, 5=Analog 2-10V PE, 6=Econ Enable, 7=Econ & Min Pos, 8=MinPos Enable
MV	36	HumidifierConfig	Default Unconfig		Write	1=Unconfig, 2=Analog 0-10V, 3=Analog 2-10V, 4=PWM, 5=Digital
MV	37	Output2ConfigSt			Read	1=Unconfig, 2=Cool1, 3=Cool2, 4=Cool3, 5=Cool4, 6=Heat1, 7=Heat2, 8=Heat3, 9=Min Position, 10=Reversing Valve, 11=Prop Heating, 12=Dampers, 13=Humidier, 14=Power Exhaust
MV	38	Output3ConfigSt			Read	1=Unconfig, 2=Cool1, 3=Cool2, 4=Cool3, 5=Cool4, 6=Heat1, 7=Heat2, 8=Heat3, 9=Min Position, 10=Reversing Valve, 11=Prop Heating, 12=Dampers, 13=Humidier, 14=Power Exhaust
MV	39	Output4ConfigSt			Read	1=Unconfig, 2=Cool1, 3=Cool2, 4=Cool3, 5=Cool4, 6=Heat1, 7=Heat2, 8=Heat3, 9=Min Position, 10=Reversing Valve, 11=Prop Heating, 12=Dampers, 13=Humidier, 14=Power Exhaust
MV	40	Output5ConfigSt			Read	1=Unconfig, 2=Cool1, 3=Cool2, 4=Cool3, 5=Cool4, 6=Heat1, 7=Heat2, 8=Heat3, 9=Min Position, 10=Reversing Valve, 11=Prop Heating, 12=Dampers, 13=Humidier, 14=Power Exhaust
MV	41	Output6ConfigSt			Read	1=Unconfig, 2=Cool1, 3=Cool2, 4=Cool3, 5=Cool4, 6=Heat1, 7=Heat2, 8=Heat3, 9=Min Position, 10=Reversing Valve, 11=Prop Heating, 12=Dampers, 13=Humidier, 14=Power Exhaust
MV	42	Output7ConfigSt			Read	1=Unconfig, 2=Cool1, 3=Cool2, 4=Cool3, 5=Cool4, 6=Heat1, 7=Heat2, 8=Heat3, 9=Min Position, 10=Reversing Valve, 11=Prop Heating, 12=Dampers, 13=Humidier, 14=Power Exhaust
MV	43	Output8ConfigSt			Read	1=Unconfig, 2=Cool1, 3=Cool2, 4=Cool3, 5=Cool4, 6=Heat1, 7=Heat2, 8=Heat3, 9=Min Position, 10=Reversing Valve, 11=Prop Heating, 12=Dampers, 13=Humidier, 14=Power Exhaust
MV	45	PropHeatGx	Default Unconfig		Read	1=Stage1, 2=Stage2, 3=Stage3, 4=Unconfig

Object ID lookup: Distech Controls ECY-303 preloaded applications point IDs by name

AI1UI1
AI2UI2
AI3UI3
AI4UI4
AI5UI5
AI6UI6
AI7UI7
AI8UI8
AI5001ComSensor1Temp
AI5002ComSensor1Humid
AI5003ComSensor1CO2
AO6AO6
AO7AO7
AO8AO8
BI5004ComSensor1Motion
AV1SpaceTemp
AV2SetPtOffset
AV3ReturnTemp
AV4DischargeTemp
AV5FanCurrent
AV6SpaceCO2
AV7ReturnCO2
AV8OutdoorTemp
AV9ReturnHumidity
AV10DischargeHumidity
AV11SpaceHumidity
AV12OutdoorHumidity
AV13Elevation
AV14OptStartCoolFactor
AV15OptStartHeatFactor
AV16Shedding
AV17SingleSP
AV18SingleSPHeatDB
AV19SingleSPCoolDB
AV20PropHeat
AV21Humidifier
AV22Dampers
AV23OptStartMaxStartupTime
AV24OptStartFactorWeight
AV26CoolStgOnDelay
AV27CoolStgOffDelay
AV28HeatStgOnDelay
AV29HeatStgOffDelay
AV30DampersDischAirSP
AV31EquipEnableDelay
AV32MinDamperPos
AV33MinDamperCO2
AV34FanStartDelay
AV35FanStopDelay
AV36ActCoolSp
AV37ActHeatSp
AV38UnoccCoolSp
AV39StandbyCoolSp
AV40OccCoolSp
AV41OccHeatSp
AV42StandbyHeatSp
AV43UnoccHeatSp
AV44MinFanCurrent
AV45MaxFanCurrent
AV46ChgOverDelay
AV47BypassTime
AV48MaxOatHeat
AV49MinOatHeat
AV50EffectSp
AV51TempErr
AV52CO2Setpoint
AV53SpaceHumiditySP
AV54DehumiditySP
AV55DischHumiditySP
AV56MaxRangeCO2
AV57MinRangeCO2
AV58ComSensorSpOffset
AV59FanOnSetpoint
AV60FanOffSetpoint
AV61OutdoorEnthalpy
AV62ReturnEnthalpy
AV63HoldTime
AV64EconEnthalpySP
AV65PwmPeriod
AV66EconMaxEnthalpySP
AV67EconMaxOutTemp
AV68CoolingStgsLoad
AV69HeatingStgsLoad
AV75ComSensorMinCoolSP
AV76ComSensorMaxCoolSP
AV77ComSensorMinHeatSP
AV78ComSensorMaxHeatSP
AV79DischTempCoolSP
AV80DischTempCoolDB
AV81DischTempHeatSP
AV82DischTempHeatDB
AV83ExhaustStartSP
AV84ExhaustStopSP
AV85InitStartDelay
AV86DischTempLowLimitSP
AV87SpOffsetRange
AV88SpaceTempOffset
AV89ReturnTempOffset
AV90DischTempOffset
AV100AppVersion
BV1Cool1
BV2Cool2
BV3Cool3
BV4Cool4
BV5Heat1
BV6Heat2
BV7Heat3
BV8MinPosEnable
BV9ReversingValve
BV10PowerExhaust
BV11OptStartEnableUpdate
BV12FanStatus
BV13EconEquip
BV14EnableDehumid
BV15EnableMinPosStandby
BV16GasHeating
BV17LowLimitAlarm
BV18LowLimitReset
BV19EnableOutputs
BV20LowLimitResetType
BV21OatHeatEnable
BV22OatCompEnable
BV23EconEnable
BV24RoomOccupancy
BV25EnableRoomUnocc
MV1OccupancyCmd
MV2HvacModeCmd
MV3FanModeCmd
MV4AuxContact
MV5EconEnableBI
MV6OccDetection
MV7WindowContact
MV8EcoVueHeatStatus
MV9EcoVueCoolStatus
MV11SensorTempUnits
MV12SensorsType
MV13OptStartMode
MV14HvacModeStatus
MV15OccupancyStatus
MV16ComSensorSpType
MV19ComSensorLock
MV20UI6Range
MV21UI7Range
MV22UI8Range
MV24UI1Config
MV25UI2Config
MV26UI3Config
MV27UI4Config
MV28UI5Config
MV29UI6Config
MV30UI7Config
MV31UI8Config
MV32CoolHeatConfig
MV33RevValveConfig
MV34PropHeatConfig
MV35DampersConfig
MV36HumidifierConfig
MV37Output2ConfigSt
MV38Output3ConfigSt
MV39Output4ConfigSt
MV40Output5ConfigSt
MV41Output6ConfigSt
MV42Output7ConfigSt
MV43Output8ConfigSt
MV45PropHeatGx

Integration notes

Objects are documented one per section in the guide's Variables chapter, including the universal inputs (AI 1-8) and analog outputs (AO 6-8). The digital outputs DO1-DO5 are shown only as DO1-DO5 with no BACnet object type, so they are not listed.
The guide has no read/write column, so access is inferred: inputs and values the guide describes as displayed (measured or calculated) are read-only; setpoints, commands, configuration values and the analog outputs are marked writable.
This is the imperial-units (IMP) edition; the separate SI edition lists the same objects with metric units.
PID loop objects (loop 1-8) are named in the guide but not listed here.
AI 5001-5003 and BI 5004 carry readings from an Allure EC-Smart-Vue sensor when one is connected.

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 ECY-303 preloaded applications (rooftop unit) 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 Distech Controls ECY-303 preloaded applications (rooftop unit)

How many BACnet points does the Distech Controls ECY-303 preloaded applications (rooftop unit) have?

This list has 165 BACnet objects: 11 analog inputs, 3 analog outputs, 85 analog values, 1 binary input, 25 binary values, 40 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Distech Controls ECY-303 preloaded applications (rooftop unit) BACnet points are writable?

98 of the 165 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 Distech Controls ECY-303 preloaded applications (rooftop unit) BACnet documentation?

The source is ECY-303 Preloaded Applications User Guide (ECY-303 Preloaded Apps_UG_11_EN), revision 2017-06 (version 1.1), published free by Distech Controls at https://docs.distech-controls.com/api/khub/documents/VnZEPpKpBFqw7fCM8XowKw/content.

What are the minimum BACnet points to integrate the Distech Controls ECY-303 preloaded applications (rooftop unit)?

Start with MV 1 OccupancyCmd (Occupancy command from the BMS); MV 2 HvacModeCmd (HVAC mode command); MV 3 FanModeCmd (Fan mode (on when occupied, or auto)); AV 40 OccCoolSp (Occupied cooling setpoint); AV 41 OccHeatSp (Occupied heating setpoint); MV 15 OccupancyStatus (Effective occupancy state); MV 14 HvacModeStatus (Actual HVAC mode); AV 1 SpaceTemp (Space temperature used for control); BV 12 FanStatus (Supply fan status); BV 17 LowLimitAlarm (Discharge air low-limit alarm).

How do I enable BMS control of the Distech Controls ECY-303 preloaded applications (rooftop unit)?

MV 1 OccupancyCmd takes occupancy from the BMS and is combined with local occupancy detection into MV 15 OccupancyStatus. MV 2 HvacModeCmd forces the mode when it is not Auto.

Can the BMS supply sensor values to the Distech Controls ECY-303 preloaded applications (rooftop unit)?

The guide says the measured values can be overridden through the BACnet priority array for testing.

How do I check these points on the real ECY-303 preloaded applications (rooftop unit)?

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 Distech Controls BACnet points lists

Source: ECY-303 Preloaded Applications User Guide · ECY-303 Preloaded Apps_UG_11_EN · rev. 2017-06 (version 1.1). Object names, instances and units are reproduced as published; descriptions are our own.

Distech Controls ECY-303 preloaded applications (rooftop unit) BACnet points list

BMS integration notes: Distech Controls ECY-303 preloaded applications (rooftop unit)

Minimum points to map

Enable & remote start

Sensors & values from the BMS

Network setup

Watch out for

Distech Controls ECY-303 preloaded applications (rooftop unit) BACnet objects

Integration notes

Questions about the Distech Controls ECY-303 preloaded applications (rooftop unit)

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Distech Controls ECB-PTU-208 / ECB-PTU-308 preloaded applications

Distech Controls ECB-PTU-307 preloaded applications

Distech Controls ECY-PTU-107 preloaded applications

Distech Controls ECY-PTU-207 / 208 and ECY-TU-203 preloaded applications (Eclypse Facilities)