There are plenty of courses that will teach you the basics of using and programming PLCs. This course will show you a structured technique that will make your programs robust, readable, and easily maintained by the technicians who will be supporting them. No more support calls at 3:00 am.
Since the PLC's inception to replace Relay Logic Panels and to allow Electricians and Technicians to program them with a familiar interface, Ladder Diagram has been the de facto in the U.S.A. PLCs using sequential logic allow the manufacture of just about any product you purchase in the supermarket.
Using this technique. You will learn to design solutions by use of converting a graphical structured approach to Ladder Diagram that Electricians and Technicians are familiar with.