To learn PLC, you must first have the basic knowledge of electrician and computer. With this knowledge, you can teach yourself. It's not difficult. As for training institutions, there are technical training and so on ... Many, the tuition fee should be less than 5,000, because it is not difficult to learn PLC, and the connection lies in frequent contact with industrial automation equipment. There is also that PLC is a very simple and basic automatic programming controller, of course, many skills are not overwhelming.