Mode switching control method, device and system for unidirectional serial bus network

Abstract

The invention provides a mode switching control method, a mode switching method, a device and a system for a unidirectional serial bus network. Master node equipment determines a working mode required by slave node equipment, and instructs the slave node equipment by virtue of a first mode switching instruction message or a second mode switching instruction message to switch into the required working mode; the slave node equipment is configured with two types of working modes: a receiving and forwarding working mode and a receiving and transparent transferring working mode; when the working mode is the receiving and forwarding working mode, received service messages are processed, and whether to send the processed service messages or not is judged; and when the working mode is the receiving and transparent transferring working mode, the received service messages are processed, and the service messages are sent at the same time. Thus, in the embodiments of the invention, the slave node equipment can perform switching of the working mode according to instructions from the master node equipment so as to adapt to different types of service requirements.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a mode switching control method, device and system of a unidirectional serial bus network. Background technique [0002] At present, unidirectional serial buses such as RS485 are used in networks such as remote industrial control and remote intelligent meter reading; among them, the network is usually connected by a unidirectional ring network or a unidirectional ring network connected to a unidirectional ring network, including the following Two networking methods: method 1, the concentrator directly forms a one-way ring network with several smart instruments through a one-way serial bus; method two, the concentrator and collectors form a backbone network through a one-way ring network, and each collector A unidirectional ring subnet is formed by unidirectional serial bus and several smart instruments respectively. In the above networking mode, due to the one-way limitat...

AI Technical Summary

Problems solved by technology

In the above networking mode, due to the one-way limitation of the RS485 one-way serial bus, the collector and the smart instrument only support the receiving transparent transmission working mode, and process the received data message in this receiving transparent transmission working mode, and at the same time The data message is transmitted to the sending port, and the receiving transparent transmission working mode is only suitable for the sending and response of ordinary business messages with large data traffic and small delay, not suitable for small data traffic and no delay requirements Control the sending and response of business messages; therefore, how to make the network constructed by the above networking methods adapt to different types of business needs has become an urgent technical problem to be solved

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