According to the BACnet protocol documentation:

Defines a standardized object whose properties represent the externally visible characteristics of a multi-state value. A "multi-state value" is a control system parameter residing in the memory of the BACnet device. 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 inputs and outputs or perhaps the value of an analog input or 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 multiStateValue have the following properties:

•ackedTransitions

•alarmValues

•commandTimeArray

•currentCommandPriority

•description

•eventAlgorithmInhibit

•eventAlgorithmInhibitRef

•eventDetectionEnable

•eventEnable

•eventMessageTexts

•eventMessageTextsConfig

•eventState

•eventTimeStamps

•faultValues

•lastCommandTime

•notificationClass

•notifyType

•numberOfStates

•objectIdentifier

•objectName

•objectType

•outOfService

•presentValue

•priorityArray

•profileLocation

•profileName

•propertyList

•reliability

•reliabilityEvaluationInhibit

•relinquishDefault

•stateText

•statusFlags

•tags

•timeDelay

•timeDelayNormal

•valueSource

•valueSourceArray