1769-IF8 AB

PLC manufacturers have gradually added various communication interfaces and provided a complete communication network on the basis of providing physical layer RS232/422/485 interfaces on the original CPU template. Due to the rapid development of data communication technology

users have strong requirements for openness, and the synchronous development of fieldbus technology and Ethernet technology, the PCS system composed of PLC is slightly better than the current situation of DCS’s openness. Rockwell AB has formed a multi-layer structure system, including Ethernet Net, Control Net, Device Net, and ASI fieldbuses (which are also compatible with the original DH+network).

Siemens has proposed the S7 Routing network, which consists of two layers: Profibus-DP and Industrial Enternet, in addition to the Profibus-DP communication network and Profibus-FMS network. The internet is still developing, and China should actively invest in it.

n 2001, China’s mechanical industry became a new highlight of industrial development, with a total output value increasing by 17.15% compared to the previous year. The production of automobiles ranked among the top 10 in the world, and the production of machine tools ranked fifth in the world

The profit of the mechanical industry increased by 33.35%, accounting for over 60% of the newly added profit of the entire industry. Exports have also shown promising growth. The machinery industry proposes to implement networking. PLC practitioners should have a clear understanding of this, and pay special attention to the openness of networking, the performance/price ratio of network composition, and the reliability, security, and progressiveness of the network.