HEBus efficient fieldbus system for preferably realizing shortest message in output and communication method

Abstract

The invention relates to the technical field of industrial control, and provides a HEBus efficient fieldbus system for preferably realizing the shortest message in output and a communication method. The communication method comprises the following steps: a step 1, initial setting: after a system is powered on, a master station initially sets slave stations, if the initialization is not successful, fault processing in a step 2 is carried out, if the initialization is successful, ring network communication in a step 3 is carried out, data exchange of the master station and the slave stations can be completed by once frame transmission in a communication process, in the cause of a fault, a communication mode is switched to carry out point-to-point communication in a step 4 for assisting the ring network communication, and the ring network communication can be automatically recovered in the communication process; and in the case of an unrecoverable fault in the communication process, communication termination in a step 5 is carried out. In the communication process of the communication method provided by the invention, recursive transmission of the shortest message is preferably realized in the output, a data area is dynamically allocated, and the master station re-addresses the slave stations according to a descending order of net output values, therefore an optimal data transmission path is provided, the time wasted in the transmission process is shortened, and the data transmission rate can be greatly improved.

Description

technical field [0001] The invention relates to an HEBus high-efficiency field bus system and a communication method for outputting the shortest message first, and belongs to the technical field of industrial control. Background technique [0002] In the field of industrial control technology, it is difficult for a single control unit to meet the needs of a multi-point distributed cooperative control system. For a multi-point distributed cooperative control system, a large amount of communication between stations is required to perform multi-point acquisition and cooperative control. With the continuous development of network technology and field bus technology, there are many technologies that can realize multi-point distributed cooperative control. [0003] At present, the communication protocols widely used in the field of industrial control technology include Modbus, Profibus, MPI, TCP, UDP, EtherCAT, etc. The communication systems based on the above protocols are mostly...

AI Technical Summary

Problems solved by technology

This communication method can realize ring network and point-to-point communication. In the communication process, the output priority is used to realize the recursive transmission of the shortest message, which reduces the workload of the master station, improves the utilization rate of the message, and has perfect network redundancy. Function and self-recovery function to ensure the real-time and reliability of data communication, and solve the problems of complex design, low transmission efficiency and low reliability of existing communication technology

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