The output A2.5 is activated 5 seconds after input E0.0 is closed. When the input is reopened, the output is deactivated.

Diagram of a timer with a delay in activation

The operation of the pulse timer is shown in the above time diagram. The first line represents the input signal and the second line is the corresponding output.
The program ladder has been designed using a timer SE (delayed activation) activated by the NO contact of E0.0, with a time constant equal to 500 hundredths of a second and the output connected to the coil of A2.5.

The first group of statements of the AWL program activates the timer T2 as a delayed activation (SE T2) following the rising edge of the input (U E0.0) with a time constant of 5 seconds loaded in accumulator 1 (L KT500.0). The second group of statements copies the status of the timer (U T2) to the output of the PLC ( = A2.5).

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