Object name default assignment

By default, the Device object name has the same value as the System name. It is not updated on a System name change. The Device object name can only be changed from the BACnet client side. The default name of a Measurement object is formed by combining the abbreviation for the object type and its instance ID, e.g., “AV–2”, where AV stands for Analog value.

The object name can be changed from the BACnet client side. If a user adjusts the setting labeled BACnet sensor measurement object type in the GUI from Analog Value to Analog Input, the object names will be updated accordingly for those objects that still have their default names.

For instance, “AV–2” would be updated to “AI-2” to reflect the change in object type from Analog Value to Analog Input.

Indications of alarm presence for measurement objects

Depending on the alarm type the property Reliability is updated for the measurement object to which it refers, or for all measurement objects of the corresponding sensor.

Alarm types	Alarm applies to	Reliability	Integer value
Threshold alarm	Measurement object	UNRELIABLE_OTHER	7
Battery alarm	Battery object	UNRELIABLE_OTHER	7
RSSI alarm	RSSI object	COMMUNICATION_FAILURE	12
Wrong channel alarm	All sensor objects	CONFIGURATION_ERROR	10
Error flag alarm	ll sensor objects	AUNRELIABLE_OTHER	7

Reliability property value is set to NO_FAULT_DETECTED (integer value: 0) if there is no alarm detected.

Units for Measurment object present value

The BACnet standard defines a set of units for representing the present value of a Measurement object. These units are used to specify the type and scale of the measured quantity. Units property conversion table. All units which are not in this table do not have an appropriate BACnet unit integer. Units properties will be set to 95 (No units)

Bacnet-stack variable name	Unit	BACnet enumeration integer value
DEGREES_CELSIUS	C°	62
DEGREES_FAHRENHEIT	F°	64
DEGREES_KELVIN	K	63
PERCENT_RELATIVE_HUMIDITY	%	29
PARTS_PER_MILLION	ppm	96
AMPERES	A	3
VOLTS	V	5
SECONDS	s	73
OHMS	Ω	4
LUXES	lx	37
KILOGRAMS_PER_CUBIC_METER	kg/m3	186
DECIBELS_MILLIVOLT	dBm	200
HECTOPASCALS	hPa	133
MILLIMETERS_OF_MERCURY	mmHg	59
BARS	bar	55
INCHES_OF_MERCURY	inHg	61
PASCALS	Pa	53
MILLIMETERS_OF_WATER	mmH2O	206
MILLIBARS	mbar	134
METERS	m	31
CENTIMETERS	cm	118
MILLIMETERS	mm	30
MICROMETERS	µm	194
FEET	ft	33
INCHES	in	32
KILOGRAMS	kg	39
POUNDS_MASS	lb	40
NEWTON	N	153
METERS_PER_SECOND	m/s	74
KILOMETERS_PER_HOUR	km/h	75
MILES_PER_HOUR	mi/h	78
FEET_PER_SECOND	ft/s	76
PERCENT	%	98
PARTS_PER_MILLION	ppm	96
NEWTON_METERS	Nm	160
METERS_PER_SECOND_PER_SECOND	m/s2	166
JOULES	J	16
KILOJOULES	kJ	17
MEGAJOULES	MJ	126
BTUS	BTU	20
KILOWATT_HOURS	kWh	19
SIEMENS_PER_METER	S/m	174
WATTS	W	47
KILOWATTS	kW	48
MEGAWATTS	MW	49
HORSEPOWER	hp	51
CUBIC_METERS_PER_HOUR	m3/h	135
LITERS_PER_HOUR	l/h	136
CUBIC_METERS_PER_MINUTE	m3/min	165
LITERS_PER_MINUTE	l/min	88
CUBIC_METERS_PER_SECOND	m3/s	85
LITERS_PER_SECOND	l/s	87
CUBIC_FEET_PER_SECOND	ft3/s	142
CUBIC_METERS	m3	80
LITERS	l	82
CUBIC_FEET	ft3	79
US_GALLONS	gal	83
BECQUERELS	Bq	222

Custom unit definition specific to Aranet PRO

Bacnet-stack variable name	Unit	BACnet enumeration integer value
BECQUERELS_PER_CUBIC_METER	Bq/m3	50001
PULSES	pulses	50002
FRACTION_OF_ONE	/	50003
MICROMOLE_PER_SECOND_PER_METER_SQUARED	μmol/m2s	50004

For those measurements which have a string representation of its unit is included in the Description property.