At present, domestic automation product manufacturers mainly focus on DCS system, industrial instruments, industrial software and so on. After decades of development and accumulation, some professional companies have emerged and have certain competitiveness.

(1)PLC

With the rapid development of computer network technology and integrated circuit, PLC is developing towards miniaturization, miniaturization and high speed. In the application, PLC can be connected with upper computer or attached to PLC to form distributed control system. PLC has been widely used in metallurgy, power, petroleum, chemical, building materials, machinery, light industry, food, municipal, transportation and military industries.

According to the report of Frost & Sulliva, the global PLC increased from 3.9 billion US dollars in 1993 to 7.6 billion US dollars in 2000, from 46% of the industrial computer market to 50%.

Experts estimate that in 2000, the domestic market sales of PLC reached 150000-200000 sets, about 2.5-3.5 billion yuan, of which imports accounted for about 90%. The above data show that: China's PLC market is almost occupied by foreign products, and the market share of domestic PLC products is less than 10%. (the above PLC statistics include small PLC)

According to experts' estimation, the annual growth rate of domestic PLC products is 12%, so as to meet the needs of technical transformation in petroleum, chemical, electric power, municipal and other industries. By 2005, the national demand for PLC will reach about 250000 sets, about RMB 3.5-4.5 billion.

At present, there are about 200 PLC manufacturers in the world, producing more than 300 varieties. The main foreign manufacturers include Siemens, Modicon, A-B, Omron, Mitsubishi, Ge, Fuji, Hitachi, Guangyang, etc. According to the survey results of the Ministry of electronics in 1998, the domestic users of Siemens products accounted for 20.8%, Modicon accounted for about 14%, a-b14%, Omron 14%, Mitsubishi 8.3%, Ge 6.25%, Fuji 4.2%, and others (Hitachi, Guangyang, etc.) accounted for 4%.

Domestic PLC products are still mainly foreign products, and Siemens, Modicon, A-B, Omron, Mitsubishi, GE products.

(2) DCS system

The research work of DCS made in China started earlier, and the introduction and absorption of basic DCS began in the mid-1970s. In the early 1980s, we began to tackle key technical problems. From the end of 1980s to the beginning of 1990s, the world famous DCS manufacturers basically established joint ventures or branches in China, started large-scale market partition work, and basically completed in the early 1990s. At that time, DCS of major industries such as electric power, petrochemical, building materials and metallurgy were basically imported.

The main DCS manufacturers are concentrated in the United States, Japan, Germany and other countries. For example, Honeywell's TDC3000 / microdc3000, tdc3000x, etc.; Foxboro's I / as; Westinghouse's WDPF; wailey's network90 and INFI90; Yokogawa's CENTUM, CS; Yewpack's MARKII; Germany's Siemens's TELEPERM; ABB's MOD300, sipaos200, etc.

Since the early 1990s, several DCS specialized companies have been formed in China, such as Hollysys company and aerospace TT & C company in Beijing, central control company and Weisheng company of Zhejiang University in Hangzhou, and Xinhua company in Shanghai. These companies not only occupy a certain market share and accumulate the development capital and technology, but also greatly reduce the price of the system imported from abroad, making contributions to the automation promotion in China. For example, the products of Shanghai Xinhua company and Beijing Hollysys company have basically replaced the imported system in the control system of large thermal power units. On the basis of promoting multiple sets of control systems for 200000 kW thermal power units, they are striving to enter the control systems of 300 MW and 600 MW thermal power units.

(3) Industrial PC

According to the report of Frost & Sulliva, the global industrial PC market sales increased from US $1.02 billion in 1997 to US $1.37 billion. Foreign manufacturers are mainly Taiwan Advantech, Intel, IBM, Siemens, etc.

The main domestic manufacturers are Yanxiang intelligent, Beijing Kangtuo industrial computer company, Beijing chemical institute automation system company, Beijing industrial control computer factory, Beijing Hongtuo industrial control, Beijing Great Wall Industrial control, Beijing University of technology, Beijing Founder, Shanghai kangteke electronic technology company, North China industrial control, Hollysys automation engineering company, Lishan company of China Aerospace Industry Corporation, etc.

According to the survey conducted by the Ministry of electronics in 1998, China's industrial PC market is dominated by overseas products such as Taiwan Advantech and American Intel, but domestic products also occupy a certain market share.

(4) Fieldbus control system

Fieldbus control technology brings a revolution to the control system architecture. FCS will replace the traditional DCS. In order to speed up the development of Fieldbus Technology in China during the Ninth Five Year Plan period, the state supported the establishment of "field bus Professional Committee of China electromechanical integration technology application Association" and "field bus Professional Committee of China Instrument and meter Association" to promote the industry work. At the same time, technical transformation was carried out in Chongqing, Xi'an and Shanghai production bases, focusing on intelligent instruments On the development and engineering of fieldbus technology, we should supplement and improve the process equipment, development device and test device, establish the production base of intelligent instrument and automatic system, and form a moderate scale economy. Concentrate on joint research and solve the development of 50 kinds of basic products and basic products and the necessary supporting software. Focus on the development of pressure, differential pressure transmitter series, temperature transmitter series, flow instrument series, actuator and valve positioner series and more than 100 varieties. Beijing Kangtuo science and Technology Development Corporation adopts HART protocol with digital analog characteristics to develop ITT intelligent temperature transmitter. Hart fieldbus network is composed of ITT intelligent temperature transmitter and other Hart products.

(5) Industrial instruments

Instruments are widely used in equipment, transformation of traditional industry process measurement and control, is an important part of modern large-scale key complete sets of equipment. The foreign-funded enterprises in the instrument industry have a considerable scale. From January to September 2001, the sales revenue of the foreign-funded enterprises reached 11.96 billion yuan, accounting for 36.8% of the industry's sales revenue, which has been playing an important role in the industry. At present, the domestic manufacturing enterprises are mainly the private enterprises which have passed through the original state-owned enterprises and developed rapidly after restructuring. The influential companies in the industry are: Shanghai Automation Instrument Co., Ltd., Chongqing Chuanyi general plant, Wenzhou Zhengtai Group and Delixi Group, which rank 4th and 5th among the top 500 private enterprises in China.

(6)RTU

RTU products are mainly used in power grid dispatching SCADA system, substation automation control, Oilfield Automation, oil and gas pipeline network monitoring system, urban water supply and gas supply pipe network monitoring system. The power industry is the largest user.

Major foreign manufacturers include D10 / D20 / D25 / D200 of geharris; ROC product series of f-rsoemount includes roc-300 series; general RTUs (launched in 1991) include roc306, roc312 and roc3; in addition, Siemens, abb, Motorola and other companies also develop their own RTU products, but their products mainly provide services for their own SCADA system.

Domestic manufacturers include: Dongfang Electronics, NARI Group, Shandong Jicheng, etc. in the power industry; Beijing security control company and Jiangsu Huasheng Company in the oil industry.

(7) Industrial software

Automation software mainly includes human-machine interface software (HMI), PC based control software, production execution management software and corresponding services. Its main functions and characteristics: dynamic visualization of industrial process; data acquisition and management; process monitoring and alarm; report function; providing data for other enterprise programs; simple loop adjustment; batch processing; SPC process quality control; conforming to iec1131-3 standard

At present, there are less than 20 well-known automation software manufacturers in the world, but the first six companies account for 75% of the market share, such as integration, Rockwell, Wonderware, etc. The domestic market can be subdivided into high-end and medium low-end. The high-end market is basically occupied by software of foreign brands, such as iFIX, inouch, WinCC, Citect, Cimplicity and RSView, such as some national large projects, the main production line control of large enterprises, etc. the high-end market is characterized by small installed capacity, but large sales volume of single machine. At present, no domestic and foreign brand can install more than 1000 sets of software annually. There are nearly 10 automation software companies in China, which mainly occupy the middle and low-end market. The annual installed capacity of Kingview of Beijing yacon Technology Development Co., Ltd. is about 5000 sets. Other companies such as MCGS, Controx2000, century star, Tiangong, etc.