Overview of PLC market development in recent years According to the global PLC market report released by Frorst & Sullivan, there is sufficient evidence to prove that the PLC market is growing positively in all areas. In the past decade, the PLC market has experienced a strong rebound after experiencing a significant decline in previous years. It is estimated that the market will reach US$14.85 billion by 2018, an increase of 40% over the previous five years. What is exciting is that small and medium-sized PLCs will play a vital role in market growth. ARC published a market development report on PLC and PAC in August 2015. The main point is that the PLC and PAC markets expanded in 2014. Among them, China and North America in particular have become growth engines. The market's growth prospects in 2015 and 2016 are not expected to be optimistic, mainly because the BRIC countries (Brazil, Russia, India, China) are no longer a growth factor. It is estimated that the current installed capacity of PLC is 52 million units, of which micro-mini PLCs account for a considerable number, and it is expected to reach 65 million units by 2019. A large number of them have reached the final stage of their life cycle in the next five years. The replacement of existing installed PLCs will be an important factor in the growth of the PLC market in the next five years. In addition, software and services are becoming increasingly important to PLC vendors and end users. End users are more likely to require that the functional requirements of the hardware be implemented using software. PLC related services have also become more important. In order to focus more on their core competencies and make more efficient use of engineering resources, some end users have outsourced many PLC related services such as configuration, training and maintenance. There are signs that more and more users are planning to outsource most of their maintenance, training or spare parts business, which has become a trend. According to discussions in the social network by relevant American automation people, the more concentrated opinions are that end users are driving the market. Mechanical equipment manufacturers prefer PLC because it is simple and reliable to use and cost-effective. From the perspective of technicians, there are far more people who master PLC than people who master PC and PAC. However, it cannot be assumed that the PLC will always maintain its traditional form. In the next five years, due to the rapid spread of industrial Internet of Things and the gradual entry of cloud services into the industrial market, PLCs need to provide interfaces directly with upper management software information systems such as MES and ERP. PLC systems must be hardware and software. Adapting to the needs of the new industrial revolution, that is, intelligent manufacturing, PLC manufacturers will still face severe challenges. New requirements for intelligent manufacturing to PLC functions As the controller of equipment and devices, PLC, in addition to the traditional logic control, sequence control, motion control, safety control functions, also undertake the following tasks assigned by Industry 4.0 and intelligent manufacturing: 1. More and more sensors are used to monitor the environment, the health status of the equipment and various parameters of the production process. The effective collection of these industrial big data forces the PLC I/O to be installed on the rack in a centralized manner and must be transformed. For distributed I/O. 2, all kinds of intelligent components generally use embedded PLC, or micro-mini PLC, as much as possible to complete more and more complex control tasks in the field. 3. Platformization of application software programming to further develop automation and intelligence of engineering design. 4, greatly improve the seamless connectivity, the relevant control parameters and device status can be directly transmitted to the upper system and application software, and even sent to the cloud. In a nutshell, it meets the needs of industrial big data collection, real-time autonomous control in place, automation and intelligence of programming, and improves seamless connectivity. Will the status of the PLC system as the main force of industrial control be gradually replaced by the fourth industrial revolution that is being set off? The answer is no. At the same time, it also depends on whether the PLC software and hardware technology can quickly adapt and transform. In fact, PLC's software technology is based on PLCopen and has been preparing to meet the increasingly clear requirements of Industry 4.0 and intelligent manufacturing. Figure 1 shows the position of various specifications developed by PLCopen over the years in the corresponding dimensions and levels of the Industry 4.0 Reference Architecture Model (RAMI4.0). It can be clearly seen that PLCopen International has long been improving automation efficiency. the work did. How PLC hardware adapts to the requirements of intelligent manufacturing Although the more common understanding is that the progress of PLC hardware technology is gradual, it cannot be denied that PLC hardware technology has been accumulating experience to meet the increasingly clear requirements of Industry 4.0 and intelligent manufacturing. In particular, the rapid advancement of microelectronics technology has led to a significant reduction in the power consumption of SoC chips while the main clock frequency is increasing. The development of multi-core SoCs has facilitated the logic and sequential control processing of PLCs. High-speed motion control processing, processing of visual algorithms, etc.; and advances in communication technology have led to the increasing use of distributed I/O, and ubiquitous I/O applications have also begun. In order to meet the challenges of Industry 4.0, PLC hardware design should have some room for improvement in the following aspects: 1. Greatly improve energy consumption and reduce space. 85% of the space on the PCB is occupied by analog chips and discrete components. It is necessary to concentrate the functions of discrete components on a single chip and adopt new flow-line analog circuits. 2. Increase the density of the I/O modules. 3. Perform a good heat dissipation design to reduce heat dissipation. 4. Break through the bottleneck of information security (how to prevent hacker attacks, malware and viruses). In summary, PLC hardware must have comprehensive performance, ie smaller size, higher I/O density, and more features. For example, the selection of new devices has achieved remarkable results: in order to reduce the size of I/O modules and reduce the number of components, a multi-channel parallel/serial signal converter (serializer) can be used to output the 24V output of the sensor. Convert, condition and filter and enter the PLC's MCU at a 5V CMOS compatible level. This reduces the number of opto-isolated devices necessary to three, and the signals from the multi-channel parallel/serial serializer share the same opto-isolated resources. Maxim's analog device integration design simplifies the signal chain, allowing 10V bipolar inputs to be multichannel sampled, amplified, filtered, and analog-to-digital converted with a single 5V supply. This design eliminates the 15V power supply, reducing the number of components and system cost, reducing power consumption and reducing the area occupied by components. 110V Gear Motor,Ac Motor Low Rpm,Customized Ac Gear Motor,Customized Ac Geared Motor NingBo BeiLun HengFeng Electromotor Manufacture Co.,Ltd. , https://www.hengfengmotor.com