SCL language is a structured text, similar to the programming method of computer high-level language. His language specification is close to the PASCAL language of computer. After learning for a while, he feels that he is a kind of high-level programming language in plc, than ladder diagram. The statement table is much easier to use.
Last night, I spent a few hours writing the rising and falling edges and wrote many versions, but they were cumbersome and complicated, and they were not as simple and clear as SIMENS provided. No matter how many versions, they follow the same principle: [The value of this variable is recorded at the end of the program loop. The program loop detection starts by detecting whether the last saved value is different this time, so as to judge whether there is a jump.] Therefore, there is no need to spend a lot of time with a simple program example. Going smart, I went back to the original point. Don't miss it, don't you? In the following program example, I wrote a detailed comment and shared it with people who explored the road like me! If you have any mistakes, thank you for your advice!
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