Programmable Controller (PLC) is an automatic control component that is widely used in the industry. However, the shortage of PLC application and programming talent has become a bottleneck restricting the development of China’s automatic control field. By learning the PLC programmable controller program design, the trainees can master the working principle of the programmable controller and the design method of the hardware and software of the PLC control system. They can write complex PLC programs and lay down the design, debugging and transformation work of the PLC control system. basis. Can independently undertake the design and development of related projects. Let you be upgraded to a genuine engineer by an electrician!
With the automation of modern industrial equipment, more and more factory equipment will be controlled by automation devices such as PLC human-machine interface, so the automation of equipment is getting higher and higher. The technical requirements for equipment maintenance personnel are becoming more and more strict. As a qualified technician, more and more skills are needed and more comprehensive, in order to meet the development and requirements of automation.
Learning PLC programming is not difficult at all. Some beginners have spent a lot of time in theory. As a result, they still didn’t understand PLC in half a year. In fact, they just lacked some practical experience of PLC. Just do some actual ladder diagram writing, program downloading, debugging, etc. Increase the perceptual knowledge of PLC, and you will soon be able to master the PLC technology. At the beginning, you can learn a brand of PLC first, because all PLC principles are similar. You can master a PLC and just use the manual to get started.
You can edit some simple ladder diagrams at the beginning of the course, such as the AND, OR, and output of the contacts, and run them in the PLC machine. Success will increase your interest and confidence in learning. Then use the main functions of the PLC one by one, such as high-speed counter, you can use the pulse output end of the PLC itself to connect to the input of the high-speed counter, download the programmed ladder diagram, open the variable observation window, run the program, observe the count Is the value correct? After such practice, you basically know what PLC can do, and you can be confident in the actual industrial control application.
1, the principle of electrician and the principle of the motor must understand, simply remember to back down, such as motor capacity 1KW2A, forward and reverse, star triangle wiring, wire capacity. Resistance, inductance, capacitance characteristics, etc.
2, hydraulic and pneumatic also have to master, such as pressure conversion, pressure and current ratio conversion, which must be used in pressure control
3, the wire cross-section will be seen, the line will know a few squares when you get the hand, what other electrical lines should be used, such as the motor with 4 lines, 3 main lines and 1 ground. Use shielded wires from the inverter.
4, machine repair will also be done, especially the screw, you can know a few internal angle wrench or hex wrench at a glance (do not underestimate it, usually repair the fixing screws is indispensable, this can save time)
5, PLC programming can simulate the editing, simple such as traffic lights, control the car to go, etc.
6, to be a person to do, to be modest, it is impossible for you to be everything.
7, the mentality is better, to maintain a normal heart
- Usually you have to do more work, that is, you have to work hard, so that technology can learn to solve practical problems. On the contrary, you are just talking on paper.
For the project
1, the four major PLCs will be, the basic instructions and functional instructions should be cooked
2, the communication interface should understand
3, the electrical market market should be familiar, good and bad to be differentiated, such as buying a 2 hand 40 points PLC how to judge it is good?
4, the inverter and the microcontroller must understand, frequency control and servo control must understand
5, commonly used electrical components and sensors should know
6, to CAD electrical drawing.