Struct ChangeOfStateDetector 

pub struct ChangeOfStateDetector {
    pub alarm_values: Vec<u32>,
    pub notification_class: u32,
    pub notify_type: NotifyType,
    pub event_enable: EventTransitionBits,
    pub time_delay: u32,
    pub time_delay_normal: Option<u32>,
    pub event_state: EventState,
    pub acked_transitions: EventTransitionBits,
    pub pending: Option<PendingTransition>,
    pub fault_reliability: Option<Reliability>,
}

CHANGE_OF_STATE event detector for binary and multi-state objects.

Transitions to OFFNORMAL when the monitored value matches any value in the alarm_values list. Returns to NORMAL when the value no longer matches any alarm value.

Time_Delay is honored via the split Self::probe / Self::tick entry points; see OutOfRangeDetector for the delay contract.

Fields

alarm_values: Vec<u32>

Values that trigger an OFFNORMAL state.

notification_class: u32

Instance number of the Notification Class object that distributes the events.

notify_type: NotifyType

Notify_Type: whether the transitions are reported as alarms or as events.

event_enable: EventTransitionBits

Event_Enable: the transitions whose notifications are distributed.

time_delay: u32

Seconds an offnormal condition must persist before TO_OFFNORMAL fires, and the NORMAL delay too when time_delay_normal is None; 0 fires immediately. Fault transitions are never delayed.

time_delay_normal: Option<u32>

Time_Delay_Normal (property 356): the Clause 13.3.2 pTimeDelayNormal parameter — the number of seconds a return to normal has to be sustained before the detector confirms it. None is the not-configured case and uses time_delay as the fallback required for absent pTimeDelayNormal.

event_state: EventState

Current event state.

acked_transitions: EventTransitionBits

Acked_Transitions: a set flag means that transition was acknowledged.

pending: Option<PendingTransition>

Pending delayed transition, or None when no delay is in progress.

fault_reliability: Option<Reliability>

Reliability value in force at the last entry to FAULT; None outside FAULT.

Implementations

impl ChangeOfStateDetector

pub const ALGORITHM: EventType = EventType::CHANGE_OF_STATE

BACnet Event Type corresponding to this detector’s event algorithm.

pub fn evaluate( &mut self, present_value: u32, reliability: Reliability, ) -> Option<TransitionOutcome>

Per-write entry point; see OutOfRangeDetector::evaluate.

pub fn probe( &mut self, present_value: u32, reliability: Reliability, ) -> Option<TransitionOutcome>

Per-write probe: seed or cancel a pending transition, fire on zero delay.

pub fn tick( &mut self, present_value: u32, reliability: Reliability, ) -> Option<TransitionOutcome>

Periodic tick: advance the countdown and fire on expiry.

Trait Implementations

impl Clone for ChangeOfStateDetector

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ChangeOfStateDetector

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ChangeOfStateDetector

fn default() -> Self

Returns the “default value” for a type.