What are the three basic elements of a fieldbus protocol?

The three basic elements of the fieldbus protocol are the underlying protocol, the upper layer protocol and the protocol model. Fieldbus is an industrial data bus that can save maintenance costs, improve system reliability, and provide users with more flexible system integration initiative; fieldbus mainly solves the problem of intelligent instrumentation, controllers, Digital communication between field devices such as actuators and information transfer issues between these field control devices and advanced control systems.

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What are the three basic elements of the fieldbus protocol?

The three basic elements of the fieldbus protocol are the underlying protocol, the upper layer protocol and the protocol model.

Detailed introduction:

Field bus is an industrial data bus that has developed rapidly in recent years. It mainly solves the problem of intelligent instruments and controllers in industrial sites. , digital communication between field devices such as actuators and information transmission issues between these field control devices and advanced control systems. Due to a series of outstanding advantages such as simplicity, reliability, economy and practicality, fieldbus has been highly valued by many standards groups and computer manufacturers.

Bus characteristics:

On-site control equipment has communication functions to facilitate the formation of the factory bottom control network.

The openness and consistency of communication standards make the system open and interoperable between devices.

The standardization of function blocks and structures enables interchangeability between devices with the same functions.

The control functions are decentralized to the site, making the control system structure highly decentralized.

Bus advantages:

Field bus brings automatic control equipment and systems into the ranks of information networks, opening up a wider field for its application;

One pair Multiple control devices can be connected to the twisted wire to save installation costs;

Save maintenance costs;

Improve the reliability of the system;

Provide users with more Integrate initiatives for flexible systems.

Bus Disadvantages:

The transmission delay of data packets in network communication, instantaneous errors and data packet loss in the communication system, inconsistencies in the order of sending and arrival, etc. will destroy the original certainty of traditional control systems. This makes the analysis and synthesis of the control system more complex and negatively affects the performance of the control system.

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