Question

There are two conveyors FC1 and FC2 that feed parts to a main conveyor. A proximity sensor is placed at the end of each conveyor (represented by normally open pushbuttons IN_1 and IN_2) to count its parts. As each part passes the proximity sensor it emits a single pulse. The proximity sensor pulses are sent to the counters. Each counter then shows the number of parts being placed on the main conveyor. An indicator light OUT_1 should be ON when both of the following conditions are met: FC1 has finished feeding 10 parts and FC2 has finished feeding 15 parts onto the main conveyor. A normally open pushbutton IN_3 is used to reset both the counters. Design the ladder diagram.

Answer 1