According to the BACnet protocol documentation:

Defines a standardized object whose properties represent the externally visible characteristics of a multi-action command procedure. A Command object is used to write a set of values to a group of object properties, based on the "action code" that is written to the Present_Value of the Command object. Whenever the Present_Value property of the Command object is written to, it triggers the Command object to take a set of actions that change the values of a set of other objects' properties.

Objects of type command have the following properties:

•ackedTransitions

•action

•actionText

•allWritesSuccessful

•description

•eventDetectionEnable

•eventEnable

•eventMessageTexts

•eventMessageTextsConfig

•eventState

•eventTimeStamps

•inProcess

•notificationClass

•notifyType

•objectIdentifier

•objectName

•objectType

•presentValue

•profileLocation

•profileName

•propertyList

•reliability

•reliabilityEvaluationInhibit

•statusFlags

•tags

•valueSource