Programming instructions

80
Here is a Flip-flop circuit.
Initially the T3 contact conducts, T4 coil counts up to 5 seconds. When T3
completes, T4 coil comes on. T4 contact conducts, causing the T3 coil to count
up to 3 seconds. At 3 seconds the T3 coil becomes active, opening the T3
contact, which then resets T4 coil.
The result is Y3 will be OFF for 5 seconds and ON for 3 seconds.
Another useful timing circuit is an off-delay timer.
In this example, X0 is our run signal. Once X0 is on, we want to turn on Y10, and
we want Y10 to remain on for 5 seconds after X0 turns off.
Sometimes, an output needs to be on for a specific amount of time, no matter
how long the input condition stays on. This is typically called a one-shot timer.
In the example above, input X11 starts the output Y1. Once the output is
energized, a timer starts. Once the timer has completed, it turns off the output.
The output will not turn on again until after the input X11 has turned off and the
timer is reset.