Struct BitResetOnDelay 

pub struct BitResetOnDelay { /* private fields */ }

Resets a boolean value after it has been true for a specified duration.

This function block monitors a boolean value and, once it has been continuously true for the preset time pt, resets it to false. It uses a Ton timer internally.

IEC 61131-3 equivalent:

tonValue(IN := Value^, PT := PT);
IF tonValue.Q THEN
    Value^ := FALSE;
END_IF

Example

use autocore_std::fb::BitResetOnDelay;
use std::time::Duration;

let mut reset_delay = BitResetOnDelay::new();
let mut flag = true;

// Flag is true, timer starts counting
reset_delay.call(&mut flag, Duration::from_millis(50));
assert_eq!(flag, true); // Not yet reset

// After delay elapses, flag is reset to false
std::thread::sleep(Duration::from_millis(60));
reset_delay.call(&mut flag, Duration::from_millis(50));
assert_eq!(flag, false);

Use Cases

• Auto-clearing acknowledgment flags
• Resetting one-shot signals after a hold time
• Automatically turning off indicators after a display period

Implementations

impl BitResetOnDelay

pub fn new() -> Self

Creates a new BitResetOnDelay with the internal timer in its default state.

Example

use autocore_std::fb::BitResetOnDelay;

let reset_delay = BitResetOnDelay::new();

pub fn call(&mut self, value: &mut bool, pt: Duration)

Call cyclically. Resets value to false after it has been true for the duration pt.

When value is false, the internal timer resets. When value is true, the timer counts up. Once the timer reaches pt, value is set to false.

Arguments

• value - Mutable reference to the boolean to monitor and reset
• pt - Duration that value must be true before it is reset

Example

use autocore_std::fb::BitResetOnDelay;
use std::time::Duration;

let mut reset_delay = BitResetOnDelay::new();
let mut alarm_ack = false;

// No effect when value is false
reset_delay.call(&mut alarm_ack, Duration::from_millis(100));
assert_eq!(alarm_ack, false);

// Set the flag
alarm_ack = true;
reset_delay.call(&mut alarm_ack, Duration::from_millis(100));
assert_eq!(alarm_ack, true); // Still true, timer just started

Trait Implementations

impl Clone for BitResetOnDelay

fn clone(&self) -> BitResetOnDelay

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BitResetOnDelay

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

Formats the value using the given formatter.

impl Default for BitResetOnDelay

fn default() -> Self

Returns the “default value” for a type.