Many departments and units have successively introduced programmable controllers and designed their own control systems, and their applications have also expanded to industrial fields such as building materials, light industry, coal, water treatment, food, pharmaceuticals, paper, rubber and fine chemicals.
With the improvement of application ability and the expansion of market demand, some departments and units have carried out secondary development and application research on the one hand, and on the other hand, they are also introducing production lines of programmable logic controllers. Establish a joint venture for the production of programmable controllers and actively develop their own products.
At the same time, programmable logic controller products were also developed in China. At that time, there were more than 20 scientific research units, universities and factories in Shanghai, Beijing, Xi’an, Guangzhou, Changchun and other places developing and producing programmable logic controllers. However, due to the lack of funds and follow-up research strength, and the relatively backward production technology, it can only stay in the laboratory stage, and has not been put into practical application and industrialized production.
The extensive development stage of programmable logic controllers (early 1990s to the present)
In the 1990s, my country’s programmable logic controllers entered a stage of extensive development, mainly in the following aspects:
The development of programmable logic controllers has been highly valued by the government. Under the leadership of the Ministry of Machinery and Electronics Industry at that time, the programmable logic controller industry association was established in 1991. The programmable controller industry association has played a bridge role between the government and enterprises, communicated the situation, and provided a basis for decision-making. At the same time, the standardization of programmable logic controllers has also received attention from relevant departments. In 1993, a programmable logic controller standardization technical committee was established, which laid the foundation for the further development of programmable logic controllers in my country.
83SR06B-E-GJR2395400R1210
