Controller task switching method, device and equipment and readable storage medium

Abstract

The invention discloses a controller task switching method, which comprises the following steps of: after receiving a switching instruction, obtaining context data of a current task, and storing the context data into a task stack memory and a data backup area; after a signal for re-executing the current task is received, judging whether the context data in the task stack memory is changed or not;if not, reading the context data in the task stack memory and executing the current task; and if yes, performing fault recording and alarming, obtaining context data from the data backup area, and executing a current task. According to the method, when context data of a current task in a task stack memory is changed, the context data is read from a data backup area and the current task is executed, so that the context data of the current task before and after task switching is ensured to be unchanged, and the running safety of a controller is further ensured. In addition, the invention furtherprovides a controller task switching device, controller task switching equipment and a computer readable storage medium, which also have the above beneficial effects.

Description

technical field [0001] The present invention relates to the field of controllers, in particular to a controller task switching method, device, equipment and computer-readable storage medium. Background technique [0002] Industrial control system (Industrial Control System, ICS) is used in many industries such as metallurgy, chemical industry, building materials, electric power, etc. Since the equipment it controls are all important industrial equipment, it has a high demand for security. The controller is the core equipment of the industrial control system, and the operation safety of the controller plays an important role in the whole control system. [0003] In the controller, each task has its own independent stack memory space, and the controller performs task switching according to the priority of each task, and most controller failures are caused by task switching. For example, in the process of task switching, the context data of current task A should be saved in th...

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a controller task switching method, device, equipment and computer-readable storage medium, which solves the problem that the existing air-conditioning inspection method wastes a lot of manpower and material resources

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