Segundo a documentação do protocolo BACnet:

Defines a standardized object whose properties represent the externally visible characteristics of any form of feedback control loop. Flexibility is achieved by providing three independent gain constants with no assumed values for units. The appropriate gain units are determined by the details of the control algorithm, which is a local matter.

Objetos do tipo loop possuem as seguintes propriedades:

•ackedTransitions

•action

•bias

•controlledVariableReference

•controlledVariableUnits

•controlledVariableValue

•covIncrement

•deadband

•derivativeConstant

•derivativeConstantUnits

•description

•errorLimit

•eventAlgorithmInhibit

•eventAlgorithmInhibitRef

•eventDetectionEnable

•eventEnable

•eventMessageTexts

•eventMessageTextsConfig

•eventState

•eventTimeStamps

•integralConstant

•integralConstantUnits

•lowDiffLimit

•manipulatedVariableReference

•maximumOutput

•minimumOutput

•notificationClass

•notifyType

•objectIdentifier

•objectName

•objectType

•outOfService

•outputUnits

•presentValue

•priorityForWriting

•profileLocation

•profileName

•propertyList

•proportionalConstant

•proportionalConstantUnits

•reliability

•reliabilityEvaluationInhibit

•setpoint

•setpointReference

•statusFlags

•tags

•timeDelay

•timeDelayNormal

•updateInterval