Wired and wireless hot-standby redundancy multi-master communication method and field network node module

Abstract

The invention discloses a wired and wireless hot-standby redundancy multi-master communication method and a field network node module. According to the method, in a field-level wired and wireless mutual-standby dual-network monitoring and control network, corresponding controlled objects are controlled, and states of monitored objects are acquired; and both a wired communication mode and a wireless communication mode of the network node module are online during work, and all modules in the network preferably select wired modes for communication generally. The method has the advantage that the redundant network node module can be directly connected with an instrument or field actuator so as to acquire the state of the instrument or control the field actuator; and meanwhile, the redundant communication of wired and wireless communication units can be realized by adopting a suitable algorithm, so that a field-level dual-network redundant communication monitoring and control system is constructed, and the reliability of an industrial field monitoring and control system is improved. The method has the characteristics of zero-cost communication operation and no need of additional redundancy management equipment.

Description

Technical field [0001] The invention belongs to the field of network communication, especially the technical field of industrial site measurement and control network. Background technique [0002] 1) Fieldbus and its multi-master communication technology [0003] In the field of industrial applications, the field bus control system FCS has matured and gradually replaced the original distributed control system DCS. FCS has the advantages of simple installation, high degree of digitalization, fault diagnosis and protection operation according to default values. It can save costs for users, improve the level of automation and the level of intelligence of the system. [0004] The working mode of the field bus is divided into master-slave mode and multi-master mode. There is only one master in the fieldbus network of the master-slave mode, and the others are all slaves. The slaves cannot communicate with each other, and the slaves only communicate with the master. In the mult...

AI Technical Summary

Problems solved by technology

[0014] 3) High operating costs

[0016] 1) The scope of application is mostly wide area network applications, not suitable for field-level measurement and control networks

[0017] 2) If it is applied in the industrial field measurement and control network, the operating cost is too high

[0018] 3) Redundancy management of communication requires a special module, which is not directly connected to the on-site instrument point

[0019] 4) This kind of redundant network still cannot avoid the cumbersome wiring installation and other problems at the measurement and control site

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