According to the BACnet protocol documentation:

Defines a standardized object whose properties represent the desired state of one or more physical outputs or processes within the BACnet device in which the object resides. The actual functions associated with a specific state are a local matter and not specified by the protocol. For example, a particular state may represent the active/inactive condition of several physical outputs or perhaps the value of an analog output. The Present_Value property is an unsigned integer number representing the state. The State_Text property associates a description with each state.

Objects of type multiStateOutput have the following properties:

•ackedTransitions

•commandTimeArray

•currentCommandPriority

•description

•deviceType

•eventAlgorithmInhibit

•eventAlgorithmInhibitRef

•eventDetectionEnable

•eventEnable

•eventMessageTexts

•eventMessageTextsConfig

•eventState

•eventTimeStamps

•feedbackValue

•interfaceValue

•lastCommandTime

•notificationClass

•notifyType

•numberOfStates

•objectIdentifier

•objectName

•objectType

•outOfService

•presentValue

•priorityArray

•profileLocation

•profileName

•propertyList

•reliability

•reliabilityEvaluationInhibit

•relinquishDefault

•stateText

•statusFlags

•tags

•timeDelay

•timeDelayNormal

•valueSource

•valueSourceArray