The iron and steel industry of PLC、DCS、FCS

Since the field bus FCS system is still in the development stage, the standard is not unified, and the equipment manufacturers are in a wait-and-see state. The price of the smart equipment with the existing bus standard is obviously high (such as a transmitter of 20,000 yuan). The iron and steel industry has the characteristics of less regulating loops and more monitoring parameters. The field bus FCS control system is rarely used, and some applications are also used as remote terminals of the PLC system, generally using the Profibus bus. Here mainly introduces the choice of DCS and PLC control system.(B&R X20ps3300 Power Supply Module, Siemens 6ES7341-1AH02-0AE0 Communications Processor, Allen Bradley 1746-NI8 SLC 500 Analog INPUT Module, B&R X20ao4632 4 Analog Output Module)

With the rapid development of microelectronic technology, especially personal computer technology, the performance of PLC and DCS has been greatly improved. PLC has greatly improved the data processing function and communication and monitoring function, the DCS system is developing towards openness, the operation station adopts industrial computer, the operating system adopts the general Windows NT operating platform, and the rich software resources of PC can be used, thus greatly reducing the system cost. The degree of complexity and price improves the cost performance of the system. In the process of grabbing the market, PLC and DCS learn from each other, infiltrate and merge with each other, which greatly increases the user's choice in design and use. At the same time, due to the large number of manufacturers of various control systems and the rapid replacement of products, it also brings certain difficulties to system selection. Now according to the different characteristics of PLC system and DCS, in the small and medium-sized metallurgical construction and transformation projects, the design, selection and application of the process control system are summed up and selected according to the following principles.

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