Fieldbus in automation

Fieldbuses enable efficient automation processes to be introduced using the latest technology

Fieldbuses for setting up networked automation systems

Fieldbuses play an essential role in automation technology by simplifying the setup of networked automation systems and enabling efficient automation processes using the latest technology.

Originally introduced to reduce the amount of cabling required in automation systems, fieldbuses and their successors, Industrial Ethernet, have taken on more extensive tasks. They not only enable the transmission of essential process information and control signals, but also support the configuration, diagnosis and coordination of technological processes across different levels of the automation pyramid. The real-time capability of data transmission is a key component in ensuring stable and efficient control and regulation processes.

With the introduction of Industry 4.0 and the Internet of Things (IoT), the requirements for fieldbuses have increased further in order to ensure effective communication between a large number of system components and secure data transmission, including over the Internet. The selection of the appropriate fieldbus or Industrial Ethernet system depends heavily on the specific requirements of the application, such as the required response times, the communication structure and the security requirements.

Advantages

  • Lower costs: Using a single bus instead of multiple point-to-point connections saves cables and connectors.
  • Greater flexibility: Plants can be expanded and adapted more easily because new devices can be easily connected to the bus.
  • Improved diagnostics: Faults can be located more quickly and easily.
  • Higher performance: Fieldbuses enable faster and more efficient data transmission.

Areas of application

  • Manufacturing automation: In manufacturing, fieldbuses are used to control machines and systems, e.g. in the automotive, food and electronics industries.
  • Building automation: In buildings, fieldbuses are used to control lighting, heating, ventilation and air conditioning (HVAC) as well as for security technology.
  • Process automation: In the process industry, fieldbuses are used to control complex processes, e.g. in the chemical and petrochemical industries as well as in power plant technology.

Challenges

  • Complexity: Fieldbuses are complex systems that consist of many different components. The use of fieldbuses therefore requires qualified personnel.
  • Costs: The individual fieldbus components are expensive, which is also reflected in the installation and maintenance costs.
  • Susceptibility to failure: If the bus fails, the control system can be cut off from the sensors and actuators. This can lead to production downtime and other serious consequences.
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