As a computer dedicated to industrial control, programmable logic controllers (PLCs), PLCs, play a decisive role in the development of industrial automation. At present, large-scale PLCs are widely used in metallurgy, electric power, transportation, and other fields due to their safety and reliability; medium-sized PLCs are gradually moving closer to large-scale PLC functions and extending to these application fields; small-sized PLCs are relatively small, but their performance is relatively small. Good, future development can be expected. China's PLC market is contending for national brands In 2015, the PLC market suffered an unprecedented impact, with sales falling by more than US$8 billion. In 2016, the PLC market continued to shrink. However, until 2017, PLC and related software and services finally ushered in an industry inflection point. It is predicted that from 2017 to 2020, the compound annual growth rate of global income will reach 3.6% or more. In the next few years, the Asia-Pacific and U.S. markets will recover at the fastest rate and show rapid growth. At the same time, the Chinese market will slowly emerge from the cold winter and join the global war. In the Chinese market, the trend of "contending for a hundred schools of thought" will become more prominent. From the analysis of domestic and foreign brands, the Chinese market is still dominated by foreign brands, and the market share of European and American brands remains high. Relatively speaking, the development of national brands is relatively late and the foundation is weak. After recent years, the development has improved but has not yet matured. ,Comprehensive competitiveness is difficult to match with foreign established companies. For example, the market share occupied by Siemens PLC products in China is self-evident, in addition to the development of Siemens headquarters, many local companies have become Siemens agents. At present, Siemens PLC applications have been spread throughout metallurgy, chemical industry, and printing. In addition, foreign brands such as Schneider, Omron, Rockwell, Panasonic, ABB, and GE account for a large share of the domestic market, while domestic brands such as Delta, Helishi, Ancon, and Taian are gradually growing up. And it has formed a certain climate. The Internet of Things era is approaching PLC or usher in new opportunities For the understanding of PLC, perhaps everyone is limited to its powerful industrial control programming function, in fact, PLC has the development potential in networking. In the past two years, the rise of a new generation of information technology, including the Internet of Things, set off a frenzy of reform in the manufacturing industry. The Internet of Things, as its name implies, is connected with objects. To realize the process of mutual connection, intelligent control technology is essential. PLC, as one of the key technologies for information collection and logical computing, is bound to play an important role in the new era. It can be imagined that with the arrival of the Internet of Things era, PLC is expected to usher in the new blue ocean. In fact, in the existing market, it is not uncommon for PLC devices with communication functions to be provided. Based on PLC's own features such as high integration, flexible configuration and fast operation, PLC can efficiently communicate with other smart devices. This is its advantage. If you can rely on PLC equipment to achieve a safe and controlled environment under different circumstances, then the status of PLC has been greatly improved. How to achieve overall control is the common problem facing the Internet of Things and PLC. However, before this, PLC's ability in communication functions needs to be improved, and high cost expenditure is also a problem that the industry urgently needs to solve. For example, it supports a variety of fieldbuses and standard communication protocols, and can be connected to the factory management network when needed. In addition, the communication protocol should also comply with ISO/IEEE communication standards and promote the opening of communication networks. Extending the application field, extending the future trend gradually Looking at the future from the current situation, machine tools can be said to be one of the more mature and mature applications of PLC products. However, judging from the current development situation, the growth rate of the machine tool industry will slow down in 2018. In addition, the rise of the robotics industry will also slow down. It will inject new vitality into the PLC industry, and the application of robotics is expected to steadily increase in the next few years. As for the follow-up development of traditional industries such as packaging machinery, it should be more stable and good. Later, with the in-depth promotion and application of PLC, major companies will increase investment and development efforts. With the influx of different capitals and the advancement of smart times, the PLC industry will present several major directions: Large-scale PLC is increasingly digitalized and its functions are diversified. For example, the networking function mentioned above will be vigorously developed and can be connected with industrial computers, Ethernet, etc., to form a complete automation control system; at the same time, in order to meet the diversified needs of the market, PLC also presents a more diversified The function. Small PLCs are moving in a simpler direction while pursuing lower costs. If major companies are to occupy a large share of the PLC market, they will have to work hard on costs in addition to the functional extensions. Because whether in the PLC market or other intelligent control subdivision areas, only cost-effective products are the people's heart. In addition, the shift in market demand also makes the PLC more compact.
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