Introduction - If you have any usage issues, please Google them yourself
A sequential program is a procedure for the logic control of a machine tool and its related equipment. For the electrical automation control engineers, the widely used control process is based on the sequential control. The programming of sequential programs is a way of programming on this basis for PLC control.
The numerical control system converts the program into a certain format first, and the CPU can decode and deal with it. CPU reads every instruction stored in the memory at high speed and executes the program by arithmetic operations. Compiling sequential programs compiled by the ladder and began other standard PLC language, can be understood as the so-called ladder execution sequence arithmetic in CPU