Programmable controller is also called PLC. PLC is an electronic device specially designed for digital operation in industrial environment.
It uses programmable memory to store instructions to perform logical operations, sequential operations, timing, counting and arithmetic operations within it, and to control various types of machinery or production processes through digital or analog inputs and outputs. PLC and its related peripheral equipment should be designed according to the principle that it is easy to form a whole with industrial control system and expand its functions. Mitsubishi FX PLC is a miniaturized, high-speed, high-performance and all aspects of the FX series of the highest-grade ultra-small program device, in addition to the input of 16-25 points of independent use, it can also be applied to a number of basic components of the connection, analog control, positioning control and other special purposes, is a set of PLC that can meet a wide range of diverse needs.
In this paper, the introduction of programmable controller, combined with the characteristics of Mitsubishi FX2N to explain the effective use and play in the efficient power supply system. PLC is manufactured with modern large scale integrated circuit technology and strict production process. The internal circuit adopts advanced anti-interference technology, which has high reliability. From the outside circuit of PLC, the use of PLC to constitute the control system, compared with the relay contactor system of the same scale, electrical wiring and switch contacts have been reduced to hundreds or even thousands of times, and the failure will be greatly reduced. In addition, the PLC has the function of hardware fault self-detection, which can send out alarm information in time when a fault occurs.
In the application software, the applicant can also program the fault self-diagnosis program of peripheral devices, so that the circuit and equipment in addition to PLC in the system can also get fault self-diagnosis protection [1].
In this way, it is not surprising that the whole system has very high reliability. As a general industrial control computer, PLC is an industrial control equipment for industrial and mining enterprises. Its interface is easy, and its programming language is easy to be accepted by engineers and technicians. Graphic symbols of ladder diagram language are quite close to the expression and relay circuit diagram. The function of relay circuit can be easily realized by using only a few logic control instructions of PLC. It opens a convenient door for people who are not familiar with electronic circuits, computer principles and assembly language to use computers for industrial control. The application of programmable controller in life is more and more extensive, replacing many complex work, and has been greatly saved and rationally utilized in resources and cost. Especially in today’s colleges and universities, it is widely used and has obvious effect.
In this paper, we will discuss the application of Mitsubishi FX2N programmable controller in high-efficiency power supply system, and introduce its functions and functions one by one. Mitsubishi FX2N programmable controller system configuration is fixed and flexible; – simple programming; free choice, rich variety; reassuring high-performance; high-speed computing; used for a variety of special purposes; simplified external machine communication; common external equipment. In order to make the machine work automatically, a large number of relays and timers have been used in the past, but it takes a lot of time to make changes and changes in wiring when the action is changed, which is not in line with the actual requirements and economic benefits.
Mitsubishi FX2N Programmable Controller has unparalleled speed, advanced functions, logical selection and positioning control features. For today’s relay and timer wiring work part has become simple and easy. Now keyboard operation can be used to replace this complex and time-consuming work, that is, the use of programmable controllers. Programmable controllers make wiring easier because of the use of programs. Even if the function is changed, it is not necessary to pry and modify the machine. It is only necessary to operate the program on the computer, thermostatic element and there will be no change or damage to the shape of the machine.
PLC uses storage logic instead of wiring logic, which greatly reduces the external wiring of control equipment, greatly shortens the period of design and construction of control system, and makes maintenance easier. More importantly, it is possible for the same equipment to change the production process by changing the procedure. This is very suitable for multi-variety, small batch production occasions [4]. Now the system configuration of programmable controller is widely used in steel, petroleum, chemical industry, electric power, building materials, machinery manufacturing, automobile, textile, transportation, environmental protection and cultural entertainment industries. College buildings are one or more buildings with certain independence or integrity.
The functions of each unit have certain similarities and inevitable internal links. It not only plays the role of disseminating knowledge, but also plays the role of cultivating humanistic quality. Electricity consumption in Colleges and universities becomes more important. As a university, under the concept of green energy-saving and environmental protection, energy-saving should be achieved. The application of PLC control technology in campus power consumption control and management effectively reduces the waste of power resources and rationalizes teaching power consumption. Mitsubishi FX2N programmable controller takes the teaching building as a unit and the classroom as the control object. Each Mitsubishi FX2N PLC controls a teaching building. Each classroom has a timetable to implement the power supply plan, simplify the program design and omit the debugging steps.
When the power supply problems occur, it greatly facilitates the troubleshooting, because the PLC implements hierarchical control. Mitsubishi FX2N PLC can provide power during the period of time.
It has selective power supply on Saturdays and weekends. It can cut off power for unused teachers’teaching buildings from 11 p.m. to 6 a.m. When the program is written, the actual situation is carefully investigated and coincided, and then the program is written to control the use of electricity. Mitsubishi FX2N programmable controller realizes the automation of electric control, greatly reduces the waste of electric power in the implementation and application of universities, and responds to the slogan of green development in order to use electricity more reasonably and realize the vision of energy-saving life. On the other hand, the safety of electricity use in Colleges and universities affects everyone’s heart. Over the years, the problems of electricity use in Colleges and universities emerge in endlessly, and have not been greatly improved by the way of inspection.
PLC can realize current output by limiting voltage, so that many high-power electrical appliances in the dormitory do not use much to enhance the safety of electricity. Mitsubishi FX2N programmable controller plays an important role in university power supply system.