We learn how to use a set rest to latch and input to an output. just like the hold-on contact, the set function can hold an input high value until it is reset by another input.
In our example, a set reset is used to start a product conveyor whenever a product sensor detects a product.
R_Trig detects the rising edge of a signal as it transitions from low to high. It has various applications, but for our example, we have used it to count products using a sensor signal as the clock.