# timing::Timer

    sys::Obj
      sys::Virtual
        sys::Component
          timing::Timer

`public class Timer` `[niagaraIcon="module://icons/x16/clock.png"]`

Timer outputs a pulse for the configured amount of time "in" is used to fire the timer:

       - if low, out is forced to false
       - if high, out = 1 until timer reaches "time" seconds
     Alternatively, the pulse can be fired from the "Start Timer" action if run is not linked.

left

  `public property int left [summary, unit="second", readonly]`

  Time left on the timer if running, in seconds If not running, this value is 0

out

  `public property bool out [readonly]`

  The timed output pulse

run

  `public property bool run [falseText="stop", trueText="run"]`

  Used to fire the timer on transition from false -> true

time

  `public property int time [summary, config, unit="second"]`

  Desired duration of the output pulse, in seconds

changed

  `public virtual override void changed(Slot slot)`

  override changed to recompute ms length of the timer if the time changes

execute

  `public virtual override void execute()`

  Execute is called once every scan.

resetTimer

  `public action void resetTimer()`

  Action to reset the timer. Any time already in progress is immediately canceled, and the "left" is set to 0 sec

start

  `public virtual override void start()`

  start computes the ms length of the timer

startTimer

  `public action void startTimer()`

  Used to manually start the timer in cases where there is no link to "in" property Issuing this command while the timer is already active will reset/restart the timer