According to the BACnet protocol documentation:

Defines a standardized object whose properties represent the externally visible characteristics of a binary value. A "binary value" is a control system parameter residing in the memory of the BACnet device. This parameter may assume only one of two distinct states. In this description, those states are referred to as ACTIVE and INACTIVE.

Objects of type binaryValue have the following properties:

•ackedTransitions

•activeText

•alarmValue

•changeOfStateCount

•changeOfStateTime

•commandTimeArray

•currentCommandPriority

•description

•elapsedActiveTime

•eventAlgorithmInhibit

•eventAlgorithmInhibitRef

•eventDetectionEnable

•eventEnable

•eventMessageTexts

•eventMessageTextsConfig

•eventState

•eventTimeStamps

•inactiveText

•lastCommandTime

•minimumOffTime

•minimumOnTime

•notificationClass

•notifyType

•objectIdentifier

•objectName

•objectType

•outOfService

•presentValue

•priorityArray

•profileLocation

•profileName

•propertyList

•reliability

•reliabilityEvaluationInhibit

•relinquishDefault

•statusFlags

•tags

•timeDelay

•timeDelayNormal

•timeOfActiveTimeReset

•timeOfStateCountReset

•valueSource

•valueSourceArray