Two-wire EtherCAT protocol conversion method and device supporting link redundancy

Abstract

The invention provides a two-wire EtherCAT protocol conversion method and device supporting link redundancy. The method comprises the steps of acquiring a data connection signal or a data effective signal of a physical layer of a communication link; analyzing according to the data connection signal or data effective signal of the physical layer so as to obtain communication states of the communication link, wherein the communication states comprise a communication normal state and a communication fault state; and determining to keep the communication link communicating or switch the communication link to a corresponding redundant link to communicate according to the communication states. According to the two-wire EtherCAT protocol conversion method and device supporting link redundancy, the data connection signal or data effective signal can be collected in real time, determination, analysis and processing are performed according to the data connection signal or the data effective signal so as to determine a switching time, so that when the communication link is switched to the redundant link, communication reliability and security are improved.

Description

technical field [0001] The invention relates to the technical field of automation, in particular to a two-wire EtherCAT protocol conversion method and device supporting link redundancy. Background technique [0002] At present, Ethernet Control Automation Technology (EtherCAT for short) was originally a real-time industrial Ethernet technology proposed by Beckhoff Automation GmbH in 2003 based on Ethernet technology. Not only has the characteristics of high speed and high data efficiency, but also has a flexible network topology, and encapsulates IP / UDP in the protocol, so the communication can be realized without the IP protocol. Therefore, EtherCAT has the following advantages: wide adaptability; conforms to the Ethernet standard; can be used as an EtherCAT slave without using a slave subnet; high data transmission efficiency; short refresh cycle; good synchronization performance. [0003] The application number is 201521063204, which discloses a coupling communication bo...

AI Technical Summary

Problems solved by technology

However, the EtherCAT coupling communication board can only realize the single-wire connection between the master station and the slave station, and between the slave station and the slave station, and does not realize link redundancy. When any module of the system master-slave station fails, the system cannot communicate normally , and even the system will stop running, which will lead to serious security incidents and affect the security, stability and reliability of the system

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