I listened to many courses about PLC training on the Internet, and most of them talked about some old-fashioned cases many years ago. All talked about some cases and theoretical knowledge that were not close to reality in the past. Most of them are theoretical knowledge and are not used in practical work. It's not bad to fool a novice. I started listening to the open class of the industrial gang last year. There seems to be a reform this year. Open classes teach directly with physical equipment. To be honest, it's a bit like not making money. They all teach in kind that is common in real life. Very close to reality, especially suitable for PLC beginners. I am a hobby of Mitsubishi PLC, and I have made a lot of progress in the footsteps of the industrial gang. I declare that I am not Mr. Advertising. I hope it works for you.