What is an essential function of the Timer On Delay instruction?

The Timer On Delay instruction is designed to create a delay before an output is energized after a certain condition is met. When the specified input condition becomes true, the timer begins counting for a predetermined duration. Once this delay time elapses, the Done (DN) bit of the timer is set, and the output is activated. This function is crucial in applications where you want to ensure that a signal does not immediately trigger an action, allowing for controlled timing in the process.

This functionality is often used in scenarios where you may need to prevent equipment from being turned on or activated too quickly after a signal is received, thereby improving safety and operational coherence in automated processes. The Timer On Delay is commonly applied in various industries for controlling motors, pumps, and other machinery that needs a delay before activation. The correct understanding of this function reinforces the practical application of timers in programmable controllers.