Why are the application scopes of fieldbuses different?

乱世煮酒论天下

Why are the application scopes of fieldbuses different? [Copy link]

The 8 protocol types used in the fieldbus international standard IEC 61158 all have their background and application fields. The bus was created to meet the needs of automation development. Since the automation needs in different fields have their own characteristics, the bus technology generated in a certain field generally has a higher degree of satisfaction in this specific field, more applications, and better applicability. As time goes by, there will be only six or seven buses that occupy about 80% of the market, and their application fields are relatively clear, such as FF, PROFIBUS-PA is suitable for process control in process industries such as metallurgy, petroleum, chemical industry and medicine, PROFIBUS-DP, Device Net is suitable for processing and manufacturing, Lon Works y PROFIBUS-FMS Device Net is suitable for buildings, transportation and agriculture. However, this division is not absolute, and there is mutual penetration between them.

Why are the application scopes of these field buses different? Some are suitable for process automation, some are suitable for machining automation, etc. What characteristics of the bus reflect these differences? The difference between the buses is the difference in transmission rate, anti-interference ability, transmission distance, and signal processing speed. How are they reflected in detail?

chunyang

The requirements of different application fields and the electromagnetic environment determine the performance parameters of the bus. To understand why, you need to first clarify the requirements.