Multi-master coexistence method in ring network

Abstract

The invention discloses a multi-master coexistence method in a ring network, which supports existence of a plurality of master stations in the ring network. For devices with master station capabilities, a default mode of operation may be configured as a PRE-M mode, and then the automatic competition is carried out after the equipment is started until a unique master station is generated, and otherstations are converted into slave stations. When the master station breaks down or is not in the network, the slave station with the master station capability enters the PRE-M mode, and competes forthe master station again. When a new PRM-E device is connected to the network, the new PRE-M device carries out priority comparison on the current main station equipment, thereby achieving a purpose that ring network can work normally when a plurality of main stations exist in the ring network.

Description

technical field [0001] The invention relates to a method for multi-master coexistence in a ring network composed of Ethernet switches. Background technique [0002] Ethernet technology gradually enters the field of industrial control and becomes an integral part of the automation communication network. In order to ensure the redundancy and maintainability of the network, industrial Ethernet has adopted a large number of ring network topologies. The ring network can realize the redundant recovery of a single communication link failure through the management of the master station. However, when the master station fails, the redundancy The recovery function cannot be realized. For this reason, the present invention proposes a kind of new method, can configure a plurality of master stations in ring network, wherein a master station is in working state, other master stations are in standby state, when the master station of working state breaks down, The standby master station m...

AI Technical Summary

Problems solved by technology

Since the master station achieves link redundancy by blocking the ring port, multiple master stations cannot coexist, because multiple master stations will block multiple ring ports, resulting in the ring network being divided into multiple segments, and the entire ring cannot achieve full communication

If only one master station is used, the disadvantage is that when the master station fails, the entire network will be in an unknown state due to the lack of a manager, which affects the reliability of the system

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