Serial communication fault detection method and device and readable storage medium

Abstract

The invention discloses a serial communication fault detection method and device and a readable storage medium, and the method comprises: disconnecting current to-be-detected ith-stage slave equipmentfrom next-stage slave equipment; detecting whether the communication between the ith-level slave equipment and the previous-level slave equipment has a fault or not; and when it is detected that there is a fault in communication between the ith-level slave equipment and the previous-level slave equipment, disconnecting the ith-level slave equipment and the communication between all slave equipment of which the communication time sequence is later than that of the ith-level slave equipment and the master equipment. By the adoption of the scheme, serial communication faults can be effectively detected, and normal work of serial communication is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of serial communication, and in particular relates to a serial communication fault detection method and device, and a readable storage medium. Background technique [0002] With the application and development of automatic control technology, the control system is becoming more and more complex, which makes many single-machine control systems gradually develop towards multi-point networking. Therefore, various serial communication standards with the RS-485 standard as the mainstream are widely used in fields such as industrial control, power communication, and smart instruments. However, most of the on-site environments such as industrial control are complicated, and there are often electrical noises that interfere with transmission lines. In addition, there are various other dangerous situations. For example, when multi-point interconnection, there will be a potential difference between the grounds of diff...

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Problems solved by technology

However, most of the on-site environments such as industrial control are complicated, and there are often electrical noises that interfere with transmission lines

In addition, there are various other dangerous situations. For example, when multi-point interconnection, there will be a potential difference between the grounds of different devices, forming a ground loop, which will interfere with the entire system and cause catastrophic damage to the system in severe cases; When there is high voltage or high current such as current surge, it is very likely to damage the equipment or endanger the safety of personnel; when a certain device on the bus fails, the transmitter will occupy the bus for a long time, resulting in deadlock

[0003] In the prior art, the general serial communication bus system does not have the fault detection function. When the bus or equipment fails, it means that all equipment cannot work, which greatly affects the normal communication

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