Question: Devise ladder programs for systems that will carry out the following tasks:
(a) Switch on an output 5 s after receiving an input and keep it on for the duration of that input.
(b) Switch on an output for the duration of the input and then keep it on for a further 5 s.
(c) Switch on an output for 5 s after the start of an input signal.
(d) Start a machine if switch B is closed within 0.5 s of switch A being closed; otherwise the machine is not switched on.