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A PLC task scheduling method and device

A task scheduling and task technology, applied in the field of data processing, can solve problems that cannot directly use multi-process or multi-task technology, cannot meet complex calculation and IO requirements, etc.

Active Publication Date: 2021-06-22
BEIJING HOLLYSYS AUTOMATION & DRIVE
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Problems solved by technology

[0002] With the diversity of products, industrial production control is becoming more and more complex. As the brain of industrial control, Programmable Logic Controller (PC or PLC) has to complete more and more work. Obviously, the single-task working environment of PLC cannot To meet the requirements of complex computing and IO, multi-process or multi-task is a mature technology in the field of modern computer operating systems. For the characteristics of the PLC industrial control field, the multi-process or multi-task technology in the field of general-purpose computers cannot be directly used. Therefore, there is an urgent need for a A Multi-task Scheduling Scheme Applicable to PLC

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  • A PLC task scheduling method and device
  • A PLC task scheduling method and device

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Embodiment Construction

[0046]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] This application provides a task scheduling method suitable for PLC, see figure 1 , methods include:

[0048] Step S101: Detect the interrupt status of the interrupt scheduling task registration clock;

[0049] In the technical solution disclosed in the embodiment of the present application, the interrupt scheduling task registers a clock interrupt as a clock interrupt processing function. The clock can be a clock signal with a period of 1 ms or a clock...

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Abstract

The present invention provides a PLC task scheduling method and device. The method includes: detecting the interrupt status of the interrupt scheduling task registration clock; when the interrupt of the clock arrives, triggering the interrupt scheduling task to obtain the scheduling status of the IEC task in each PLC; The scheduling state judges whether there is an IEC task satisfying the scheduling condition; when there is an IEC task satisfying the scheduling condition, the control scheduler schedules the IEC task satisfying the condition.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a PLC task scheduling method and device. Background technique [0002] With the diversity of products, industrial production control is becoming more and more complex. As the brain of industrial control, Programmable Logic Controller (PC or PLC) has to complete more and more work. Obviously, the single-task working environment of PLC cannot To meet the requirements of complex computing and IO, multi-process or multi-task is a mature technology in the field of modern computer operating systems. For the characteristics of the PLC industrial control field, the multi-process or multi-task technology in the field of general-purpose computers cannot be directly used. Therefore, there is an urgent need for a It can be applied to the multi-task scheduling scheme of PLC. Contents of the invention [0003] In view of this, an embodiment of the present invention provides a PLC ta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCG05B19/054G05B2219/15079
Inventor 陈幼柏尹俊杰王伟
Owner BEIJING HOLLYSYS AUTOMATION & DRIVE
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