Real-time intelligent debugging method based on RS485

Abstract

The invention provides a real-time intelligent debugging method based on RS485. The method includes the steps that (1) parameter information including the largest number of fault polling times and the longest forbidden time is configured on a communication device; (2) a communication signal is sent to an RS485 bus by means of the communication device to poll a connected RS485 communication terminal; (3) if the RS485 communication terminal cannot be communicated, a forbidden mechanism is started to test the connected RS485 communication terminal, and first, whether a forbidden identification exists on the communication terminal is judged. According to the method, a user can quickly and clearly find communication faults and detect fault points, communication efficiency can still be guaranteed after the faults occur, and according to the method, design is simple, processing speed is high, communication efficiency is high and the method is easy to use and popularize.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a real-time intelligent troubleshooting method based on RS485. Background technique [0002] The RS485 bus has been widely used in the field of industrial control because of its simple structure, low cost, high communication rate, and long transmission distance. RS485 uses half-duplex communication, and its communication system generally consists of a master node and multiple slave nodes. , using the communication mode in which the master node polls the slave nodes. [0003] Generally based on the use of RS485 communication, the system is generally composed of 1 or N buses, and each bus has 1 or N devices. Due to the characteristics of RS485 polling, communication failures often occur in one or more devices in the system. , will lead to a sharp decrease in the communication efficiency of the entire system. In communication, due to network delay or other reasons, it is eas...

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Problems solved by technology

[0004] At present, to solve the efficiency problem affected by the fault, it is generally to replace the faulty device after the communication problem or the collection delay is found. When there are many connected devices, it is difficult to judge the location of the faulty device. Patent No. 200910056041. The error detection method can check the devices connected to the bus in sequence when the system occurs, and automatically determine the location of the error device. This invention only solves the problem of quickly finding the fault point after a communication problem is found.

However, this method cannot solve the problem of efficiency in the unresolved period of the fault point, and it cannot let the user quickly know the communication fault and eliminate it

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