The complete PLC industrial field control system is an integrated electrical control system, including PLC, intermediate relays, contactors, switches, pneumatic control and actuators, ordinary motors, frequency converters and variable frequency motors, steppers Stepper controllers and stepper motors, servo controllers and servo motors, analog control, PID, etc. PLC is only the core component of the control system.
Therefore, learning PLC requires a certain foundation in electrical engineering, analog electronics and digital electronics, circuit foundation, electrical components, etc., because the description of PLC itself has many professional terms and no relevant foundation. , they will also be very confused about related professional terms, programming methods, usage methods, signal forms, etc., and it will be futile to learn, and it will have an impact on their own learning confidence.
With the above foundation, learning PLC is divided into the following parts: 1. Understand PLC working methods, input and output, and wiring; 2. Learn PLC programming software; 3. Understand PLC programming methods and instructions ; 4. Understand the control methods and methods of ordinary motors, frequency converters and variable frequency motors, stepper controllers and stepper motors, servo controllers and servo motors, analog acquisition and control, etc.; 5. PLC entire system selection, including PLC itself, executing electrical components, etc.; 6. Requirements and understanding of industrial site control, and writing design instructions; 7. Writing PLC control flow charts; 8. Writing programs; 9. On-site debugging
Many learning misunderstandings I think PLC programming is very important, and I always fall into the alley of PLC programming. In fact, for the entire PLC industrial field control system, what is more important is to write design specifications and control flow charts according to the requirements of field control, and have a control process. Only with the core idea of ????diagrams can there be a complete process program, and programming can be orderly and logical.