Method and system for checking safety functions based on PLC program, and storage medium
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A technology of safety function and inspection method, which is applied in the direction of program control, electrical program control, general control system, etc., can solve the problems of potential safety hazards, high technical requirements for safety logic function professionals, and limited inspection scenarios, etc., to reduce the use of The effect of personnel threshold and extensive application value
Inactive Publication Date: 2019-12-20
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD +1
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[0004] 2. The inspection of PLC safety logic functions has high technical requirements for professionals, the inspection time is limited, the inspection scenarios are limited, 100% function inspection cannot be achieved, and there are potential safety hazards
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Embodiment 1
[0050] see Figure 1-2 , in the embodiment of the present invention, a kind of safety function checking method based on PLC program, comprises the following steps:
[0051] S1, edit the ladder diagram logic according to the security element association relationship;
[0052] S2, the software abstracts the detection logic into a corresponding security detection group;
[0053] S3, according to the security group, follow the wizard to detect.
[0054] Further, in S3, the detection according to the wizard according to the security group specifically includes the following steps:
[0055] S31, check whether the security element is in the initial state, if so, continue to the next step S32, if not, then return;
[0056] S32, the operator cuts off the corresponding safety input according to the prompt, and the software detects whether the cut-off safety input is consistent with the prompt, if so, proceed to the next step S33, if not, then return;
[0057] S33, detect whether the...
Embodiment 2
[0063] In an embodiment of the present invention, a safety function inspection system based on a PLC program includes:
[0064] Edit ladder logic module, which is used to edit ladder logic according to the relationship between security elements;
[0065] Abstract as a detection group module, which is used to abstract the detection logic into a corresponding security detection group through software;
[0066] The detection module is used to detect according to the wizard according to the security group.
[0067] Further, the detection module includes:
[0068] a security element checking unit, configured to check whether the security element is in an initial state;
[0069]The safety input cut-off detection unit is used for the operator to cut off the corresponding safety input according to the prompt, and the software detects whether the cut-off safety input is consistent with the prompt;
[0070] The safety output cut-off detection unit is used to detect whether the corres...
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Abstract
The invention relates to the technical field of industrial automation, and in particular to a method for checking safety functions based on a PLC program, and the method comprises the following stepsof S1, editing ladder diagram logic according to the association relationship of safety elements; S2, abstracting detection logic into corresponding safety detection groups by software; and S3, performing detection according to the safety groups based on the wizard. The invention also discloses a system for checking safety functions based on a PLC program. The method for checking safety functionsbased on the PLC program creatively utilizes the concept of safety associations to develop external software to implement field-level PLC interactive communication, gradually triggers safety input equipment, such as safety doors, emergency stops and grating light curtains based on software operation wizard, automatically monitors the actual status of the output feedbacksignal on the site, and completes the inspection of the PLC safety program and the response status of the actual equipment on the site by comparing with the confirmed safety response matrix to achieve 100% safety logic checking.
Description
technical field [0001] The invention relates to the technical field of industrial automation, in particular to a PLC program-based safety function inspection method, system and storage medium. Background technique [0002] At present, with the development of science and technology, more and more smart devices are used in industrial production, and various terminals with environmental awareness capabilities, computing models based on ubiquitous technology, and mobile communications are continuously integrated into all aspects of industrial production. An intelligent production line has been formed, which greatly improves manufacturing efficiency, improves product quality, reduces product cost and resource consumption, and upgrades traditional industries to a new stage of intelligence. However, the intelligent production line in the prior art has the following problems: [0003] 1. The intelligent production line has a high degree of automation, frequent projects, and endless...
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