Timer on delay is a commonly used function in PLC programming. It allows for precise control of time-based events and actions.

When it comes to PLC programming, a timer on delay is essentially a timer that starts counting when it receives an input signal. The timer then continues to count until the preset time has elapsed, at which point it triggers an output signal.

This feature is particularly useful in various industrial applications where timing is critical. For example, in manufacturing processes, a timer on delay can be used to control the duration of specific actions or operations.

In the below picture it has been shown sample time delay program in Siemens Logo.

Here after, both I5&I6 activated, trigger gets HIGH signal and only after 3 seconds Q2 output gets HIGH.

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