【Daily Question 20090318】Please discuss the types of fieldbuses, their expansion methods, structures, and examples of their applications
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【Daily Question 20090318】 Please discuss the various types of field buses, their expansion methods, structures, and examples of their applications. We also hope that experienced users will share in-depth and practical insights. Posts that are repetitive, copied, or plagiarized will have their points deducted upon confirmation. We encourage everyone to express their opinions freely using their own words and to participate actively; valuable insights from those who contribute to the discussion will be rewarded generously.
It is only known that the field instruments on the field bus communicate with the system via digital signal transmission； And DCS is a system; the communication between instruments and the system relies on analog signal transmission ； There are FF Foundation fieldbuses and Profibus fieldbuses, suitable for the process industry. Fieldbuses have specific requirements for field instruments, which must be compatible with them as well. They should be intelligent, capable of transmitting data, and equipped with functional modules, self-diagnosis capabilities, and LAS functions. Additionally, they need to be compatible with the version of the system software. respective communication protocols should be followed. I only have a superficial understanding, and I really want to learn more in depth.
In April 2003, Version 3 of the IEC61158 Ed.3 fieldbus standard was officially adopted as an international standard, specifying 10 types of fieldbuses. Type 1 TS61158 field bus Type 2 ControlNet and Ethernet/IP field buses Type 3 Profibus field bus Type 4 P-NET field bus Type 5 FF HSE field bus Type 6 SwiftNet field bus Type 7 World FIP field bus Type 8 Interbus field bus Type 9 FF H1 field bus Type 10 PROFInet field bus. Technical characteristics of field buses: (1) Fully digital communication (2) Open interconnection network (3) Interoperability and interoperability (4) Intelligence of field devices (5) High degree of decentralization in system architecture (6) Adaptability to field environments. Mainly used in automation systems in industries such as manufacturing, process industries, transportation, building management, and power generation. This post was last edited by Mobei Yihai on 2009-3-18 09:53.]
It is only known that the field instruments on the field bus communicate with the system via digital signal transmission； And DCS is a system; the communication between instruments and the system relies on analog signal transmission ； There are FF Foundation fieldbuses and Profibus fieldbuses, suitable for the process industry. Fieldbuses have specific requirements for field instruments, which must be compatible with them as well. They should be intelligent, capable of transmitting data, and equipped with functional modules, self-diagnosis capabilities, and LAS functions. Additionally, they need to be compatible with the version of the system software. respective communication protocols should be followed. I only have a superficial understanding, and I really want to learn more in depth.
It is only known that the field instruments on the field bus communicate with the system via digital signal transmission； And DCS is a system; the communication between instruments and the system relies on analog signal transmission ； There are FF Foundation fieldbuses and Profibus fieldbuses, suitable for the process industry. Fieldbuses have specific requirements for field instruments, which must be compatible with them as well. They should be intelligent, capable of transmitting data, and equipped with functional modules, self-diagnosis capabilities, and LAS functions. Additionally, they need to be compatible with the version of the system software. respective communication protocols should be followed. I only have a superficial understanding, and I really want to learn more in depth.
I’m not sure whether EtherCAT and CC-Link count as fieldbuses; the fieldbus that is most commonly used in personal applications is likely Prifibus. Depending on the application requirements, Prifibus comes in three compatible versions: Profibus-DP, Profibus-FMS, and Profibus-PA. Profibus-DP is designed for communication between automatic control systems and device-level distributed I/O units, replacing expensive 24V or 0–20mA parallel signal lines. Profibus-FMS handles general-purpose communication at the workshop level, offering a wide range of communication services for use in industries such as textiles, building automation, as well as for sensors and actuators in automated control systems. Profibus-PA is designed specifically for process automation and is used in applications where high levels of intrinsical safety are required. Prifibus distinguishes between master devices and slave devices; it utilizes layers 1, 2, and 7 of the OSI model
Type 6 SwiftNet field bus – SwiftNet has been removed from the IEC standards, while Mitsubishi’s CC-Link has been incorporated into IEC61158. At the same time, the downstream estimation of P-Net will not be very good either.