- the advantages of PLC control system

The advantages of PLC control system

1, high reliability, strong anti-interference ability

reliability is the key to the electrical equipment performance. In PLC design and manufacturing process, the adoption of modern large scale integrated circuit technology and strict production process to make internal circuit, PLC with advanced anti-jamming capability, using PLC MTBF usually in 20000 hours, it's usually the other electrical equipment.

2, complete, perfect functions, high applicability

although there are many types of PLC, but as a result of its product seriation and modularization, and package is complete, the user can flexibly composed of all sizes and different requirements of control system. In addition to the logical processing function, most modern PLC have perfect data operation ability, can be used for a variety of control field. In recent years, the function of the PLC units, extending the application of PLC in position control, temperature control, CNC, etc. Various kinds of industrial control. Combined with PLC communication ability enhancement and the development of man-machine interface technology, use of various of PLC control system become more easy.

3, programming languages to learn and easy to use

easy to understand and master the commonly used PLC ladder diagram language and simple instructions for industrial control program, which is easily acceptable for engineering and technical personnel. Graphical symbols and ladder diagram language expression way and the relay circuit diagram is quite close, using only the small switch logic control instruction of PLC can easily realize the function of the relay circuit, for not familiar with electronic circuit principle and assembly language, don't understand the computer man opened the door.

4, small maintenance workload, convenient maintenance

PLC storage logic instead of wiring logic, greatly reducing the wiring of control equipment. At the same time has a strong ability of self diagnosis, can find out their own fault at any time, and displayed to the technical personnel, technical personnel can quickly check, determine the cause of the failure. If the PLC's own reasons, just replace plug-in module when maintenance and other components can be easily damaged, convenient and reduce the impact on production time, make it easy to maintenance is also.

5, small volume, light weight, low energy consumption

microminiature PLC, for example, at the bottom of the newly produced varieties size less than 100 mm, weighing less than 150 grams, and only a few watts of power consumption. Due to the small size is easy to load inside machine, is to realize the ideal control of electromechanical integration equipment.

the advantages of PLC controller control system, 1) With the traditional control system of PLC with different structure. The traditional system has more hardware relay and contactor; The PLC is mainly made up of 'soft relay'.

( 2) Mechanical contact more in the traditional control system, reduce the reliability of the system. For PLC is no mechanical contact, is now more advanced logic operation microelectronics technology, with its high reliability, good mechanical properties, wear small operation, so the service life is longer. At the same time, PLC electric shock is infinite, which compared with the traditional system limited shock has the superiority.

( 3) PLC system and the traditional relay - contactor logic control system adopts different control mode, the former mainly rely on the original hardware wiring between control and the PLC system with more advanced software programming to realize the line control.

( 4) Working principle of both has the very big difference, in contrast, more advanced PLC controller. The traditional relay - contactor control mode, in the working status of relay is in control, but after using PLC technology, its 'soft relay' in a periodic cycle scan through mode, the 'soft relay' is no longer restricted by time. So we say, the use of electric power drag and the combination of PLC teaching mode, to help students understand the PLC line control system to be advanced, it plays a positive role in the electric drive. In the teaching, should be gradually realize the combination between the two. The PLC technology to infiltrate electric drive teaching, improve teaching efficiency.

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