The output A2.5 is activated when input E0.0 is closed and deactivated 5 seconds later, irrespective of whether the input is opened again during this period of time.

Time diagram of the extended pulse timer.

The operation of the pulse timer is shown in the time diagram above. The first line represents the input signal and the second line its output.
The program ladder has been designed using a timer SV (extended pulse) 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 an extended pulse (SV 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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