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The Error Handling Method of Programmable Logic Controller

A technology of error handling and programming logic, applied in the direction of electrical testing/monitoring, etc., can solve problems that cannot meet actual needs, achieve the effect of enhancing error handling capabilities and meeting different control requirements

Active Publication Date: 2016-12-28
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned earlier, other unrelated subsystems may wish to continue running without any error handling
Obviously, the existing PLC error handling mechanism can no longer meet the actual needs

Method used

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  • The Error Handling Method of Programmable Logic Controller
  • The Error Handling Method of Programmable Logic Controller
  • The Error Handling Method of Programmable Logic Controller

Examples

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Embodiment Construction

[0021] Next, a PLC error handling method according to an embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the invention described herein may also be embodied in other ways, so the scope of the invention is not limited to the specific embodiments described herein.

[0022] First, refer to figure 1 An error handling method 100 in a programmable logic controller PLC according to an embodiment of the present invention will be described. The PLC controls a plurality of subsystems that have no relationship to each other, and each subsystem is associated with at least one control program.

[0023] Such as figure 1 As shown, the PLC error handling method 100 starts at step S101.

[0024] In step S110, for each of the plurality of subsystems, at least one control program associated with the subsystem is compiled into a group.

[0025] In step S120, an operation error of the control program in the PLC is detected. ...

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PUM

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Abstract

An error handling method in a programmable logic controller (PLC) is provided. The PLC controls multiple subsystems that have no correlation with each other, and each subsystem is associated with at least one control program. The error handling method includes: for all Each subsystem in the plurality of subsystems is grouped into a group with at least one control program associated with the subsystem; detecting an operating error of the control program in the PLC; in the case where the operating error is not a negligible operating error, Determine the processing method for the operation error, and perform error processing for the group to which the control program in which the operation error occurs belongs according to the determined processing method. By grouping the control programs running in the PLC according to the subsystems they belong to and executing error handling methods adapted to different subsystems, and keeping other non-related subsystems continuing to run without performing error handling, the different needs of multiple subsystems can be met. control requirements and can enhance the error handling capabilities of PLC.

Description

technical field [0001] The invention relates to the field of programmable logic controllers, in particular to an error handling method of a programmable logic controller. Background technique [0002] When a program running error occurs in a programmable logic controller (PLC), the PLC can determine whether the program running error is negligible according to the actual situation. When the PLC determines that the program running error cannot be ignored, according to the existing PLC error handling mechanism, most PLCs will stop all running programs and keep the output or output the preset value for error handling. [0003] However, a PLC may sometimes control multiple unrelated subsystems, each of which wishes to remain operational without being affected by errors in other unrelated subsystems. [0004] If the existing PLC error handling mechanism is still used, once a non-negligible operation error occurs in any subsystem in the PLC, the PLC will stop running the programs ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
Inventor 梁军
Owner SCHNEIDER ELECTRIC IND SAS
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