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1、PLC英文精品文档The latest Development of PLC1 IntroductionFor a long time , PLC will always be in the field of industrial automation and control the main battlefield for a variety of automated control equipment to provide a very reliable control applications . The main reason is that it can provide for th
2、e automation control applications safe, reliable and relatively perfect solution for the current industrial enterprises in automation needs, On the other hand ,PLC must also rely on other new technologies to deal with shrinking market share gradually brought about by the impact ,in particular the PC
3、 industry brought about by the impact .PLC need to address the problem still is the introduction of new technology ,the system of open and prices.PLC technology exhibition is the ultimate trend that people are still the focus of controversy .Most people think PLC will continue to lose market share;
4、What is more , in the face of industrial PC,PLC will be step towards death ,but there are some people believe that some special industrial applications for the PLC will continue to provide a certain market share .In the global industrial computercontrolled areas, and reopen around the open process c
5、ontrol system ,open process control software ,data communication protocol and opening up, enormous changes have taken place almost everywhere PLC, but this trend may not continue to develop .with the soft PLC(Soft PLC) configuration control software technology and the birth of further improvement an
6、d development ,installation and configuration software is Soft PLC PCbased industrial control systems market share is gradually growing ,the fact that traditional suppliers in terms of ideology PLC Have place in the dramatic change ,they must face the reality ,the traditional PLC technology developm
7、ent and raising more open to make a highprofile .The control software ,this is the core of PLC controller ,PLC providers are available to industrial users of open programming configuration tools ,but also for industrial users was very positive. In addition, open communication network technology has
8、been a breakthrough, the result is the PLC into a more open industrial control industries.2 open and PCbased industrial control PLC manufacturers have started watching PCbased industrial control technology brought about by the powerful impact .Some experts even believe that the new business brought
9、about by new technology and open technical specifications will be buried traditional PLC .PLC manufacturers that ,although in the industrial field installation of a large number of PLC control equipment ,but they still need the Joint Control software companies to develop their own PCbased industrial
10、 process control software . It is true that a few years ago in the industrial scene obviously there is a mix of the old and the new PLC ,industrial users have to learned to the old and new knowledge ,learning and even learn from each other .The majority of PLC manufacturers for industrial users prov
11、ide only a soft logic and a platform . In the highend applications, it is difficult to distinguish between PLC control system and industrial PC control system the difference between , because it both followed the same types of microprocessors and memory chips .Play the image of an analogy ,if you fo
12、rget the industrial PC literal meaning of those words then the box can observed that the more it is the complexity of those basic skills and the mixture of these technologies to be effective in combination to control system .In addition ,the adoption of the reasons for the control system functions o
13、n the one hand is the need for integration ,on the other hand also because some industrial users to function due to excessively demanding. If we can give a high degree of attention ,we can get more of the basic technical knowledge ,PLC manufacturers to focus on system functions ,while industrial use
14、rs will focus on system applications People can see that the further trend of development is to further integrate more functions to a control box .As a result sequence control and process control such incidents will be used functional approach to deal with ,like the other spots can also share contro
15、l of the control structure to the same system.It is believed PLC technology will continue to open the direction of transfer control particular, the PC-based industrial control systems. The later addition to the flexibility than traditional PLC has distinct advantages, but also has other advantages,
16、such as the system can be shortened to hit the market cycle, lower system cost of investment, improve the bottom from the factory to the corporate office automation efficiency of data flow of information And so on.On industrial PC control system for real-time response has been very good solution, perhaps the main thing is still hidden behind in technology, but the lack of corresponding track record. The PLC speaking , the strength of one
