JPH03296149A - Program defect detecting device - Google Patents

Abstract

PURPOSE:To decide whether or not an access, a processing operation, etc., are normally applied to the common data on each task with high efficiency and high reliability by deciding the normal or abnormal state of each task based on the information given from the outside and the 1st and 2nd reference data. CONSTITUTION:The storage means 6 and 7 store the 1st reference data needed for decision of the normal or abnormal state of the common data obtained by a time-series action of each task carried out based on each working condition and the 2nd reference data needed for decision of the normal or abnormal state of the working condition of each task, the access way to the common data on each task, and the processing operation performed after the access respectively. A deciding means 8 decides the normal or abnormal state of each task based on the 1st and 2nd reference data as well as the external data on the working condition of each task, the access way to the common data on each task, and the processing operation carried out after the access. Thus it is possible to decide whether an access, a processing operation, etc., are applied normally or not to the common data on each task with high efficiency and high reliability.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention generally relates to a program malfunction detection device, and in particular to a computer system that is a control device in test operation and actual operation of a plant to be controlled. The present invention relates to a program malfunction detection device that detects the validity/invalidity of processing on common data of each of a plurality of tasks set in the program.

(Prior Art) In the field of information processing technology, a task is usually defined as the smallest unit of work given to a computer system that can be executed to some degree independently. That is, a task is a unit of control flow that sequentially processes a program set in a computer system. Examples of the above tasks include reading a series of input data.

The following explanation relates to an example in which a computer system in which a plurality of tasks are set is applied as a monitoring device for various plants.

Conventionally, the following operations have been carried out during test operations and actual operations of the various plants described above. That is, first, each of the tasks sets the operating conditions ( For example, each task individually accesses the common data based on the timing of accessing the common data. Next, it is determined whether the common data is accessed based on the operating conditions of each task and whether the processing performed by each task after accessing the common data is normal.

The reason for performing the above work is to properly control the various plants that are to be controlled, to prevent abnormal plant operation, and to prevent the task itself from being abnormal (incorrect commands, incorrect processing) due to noise or other causes. This is because it is necessary to prevent this from happening.

By the way, conventionally, the method of accessing the common data for the plurality of tasks and determining whether or not the processing operations are normal have been carried out using the following procedure. That is, first, after a series of processes in the manner described above are executed by all the above-mentioned tasks, numerical data related to the processing results are displayed in chronological order on the display by the operator operating the keyboard. Then, the operator compares and contrasts the above-mentioned various numerical data with preset standard numerical data for each task, thereby checking whether the numerical data related to the processing result deviates from the standard numerical data. . When deviating numerical data is found as a result of the check, it is determined that various types of fraudulent processing are being performed in the task corresponding to the deviating numerical data, depending on the degree of deviation. was.

- (Problem to be solved by the invention) As described above, in the past, most of the work of determining how to access common data for each task and determining whether processing operations were normal or not was done manually by the operator. , even if the method relies mostly on manual work by the operator as described above,
If the scale of the system built inside the computer is small, there will be fewer task items for checking normality/abnormality, so there will not be much inconvenience. However, as the scale of the system built inside a computer becomes larger, the number of task items to be checked for normality/abnormality increases, and the processing details of each task to be checked become more complex. If this method is adopted, there will be an inconvenience that the time required for the confirmation work will inevitably increase. Moreover,
There was also the risk that the processing contents would become more complex and the confirmation of the increased number of items would be omitted.

As is clear from the above content, in a large-scale system built inside a computer, access to common data for each task forming this system is achieved using methods that rely mostly on manual operations by operators. If an attempt is made to determine whether or not the method and processing operations are normal, there are problems in that not only does the work take a long time, but there is a risk that items that should be checked may be overlooked.

Therefore, the present invention has been made to solve the above-mentioned problems, and its purpose is to provide access to common data for each task forming this system in a large-scale system built inside a computer. It is an object of the present invention to provide a program malfunction detection device that can efficiently and reliably execute the work of determining whether or not the method and processing operations are normal.

[Structure of the invention]

(Means for Solving the Problem) In order to achieve the above object, the present invention provides malfunction detection for a program that detects the normality/abnormality of a plurality of tasks, each of which operates in chronological order according to individually set operating conditions. The device includes first reference data for determining normality/abnormality of common data obtained as a result of each task operating in chronological order according to its respective operating conditions, operating conditions of each task, and common data of each task. A storage means for storing second reference data for determining how to access data and whether the processing operation after accessing the common data of each task is normal/abnormal, the common data, and the operation when each task operates. conditions,
When information regarding how each task accesses the common data and processing operations after the task accesses the common data is provided from the outside, the information and the first and second
and a determination means for determining whether each task is normal or abnormal based on reference data.

(Function) In the above configuration, the storage means stores the first reference data for determining the normality/abnormality of the common data obtained as a result of each task operating in chronological order according to its respective operating conditions, and the first reference data of each task. operating conditions, how each task accesses common data, and f? for determining normality/abnormality of processing operations after each task accesses common data. S2 reference data is stored, and the determining means stores information regarding common data, operating conditions when each task operates, how each task accesses the common data, and processing operations after each task accesses the common data. Since we decided to determine the normality/abnormality of each task based on this information and the first and second reference data when given from the outside, this system can be used in a large-scale system built inside a computer. It has become possible to efficiently and reliably perform the work of determining whether the common data of each task forming the task is accessed and the processing operations are normal.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of a program defect detection device according to an embodiment of the present invention. A program malfunction detection device 10 according to an embodiment of the present invention illustrated in FIG. 1 is a computer system main body 100 used as software in a plant monitoring device.
− Constructed in memory within. Then, the operation of each part of the plant can be indirectly confirmed during test operation and actual operation of the plant to be monitored by detecting the normality/abnormality of multiple tasks, each of which operates in chronological order according to individually set operating conditions. Let's do it.

As is clear with reference to FIG. 1, the program malfunction detection device 10 according to an embodiment of the present invention includes a process history data collection means 1, a common data collection means 2, a data storage means 3, and a judgment processing means. 4 and inference result output means 9
Equipped with: The judgment processing means 4 includes an editing section 5, a knowledge section 6, a condition section 7, and an inference section 8. The above configuration will be described in more detail as follows.

That is, the process history data collection means 1 sequentially inputs process history data 11 provided from various detectors (not shown) provided in various parts of the plant to be controlled. The process history data 11 includes the various detections described above at the timing when each part of the plant actually operates by issuing operation commands to each part of the plant by a plurality of operation tasks set to operate each part of the plant. It is given from a container (not shown). The common data collection means 2 is the process history data collection means 1 mentioned above.
starts inputting process history data 11 provided from the various detectors (not shown) described above, and at the same time starts inputting common data change results 12. As mentioned above, common data is data that is accessed in chronological order by each of multiple tasks, including multiple motion tasks, according to individually set operating conditions (especially motion timing). It is. The common data is changed as a result of chronological processing operations after access by each task. The data storage means 3 stores the process history data 11 given from the process history data collection means 1 and the change result 1 of the common data given from the common data collection means 2.
2 and memorize it. The data storage means 3 also provides the stored process history data 11 and common data modification results 12 to the editing section 5 when receiving a data read request from the editing section 5 .

The editing section 5 receives the process history data 11 and common data change results 12 given from the data storage means 3, edits each of these data 11 and 12 into a form that makes it easy for the inference section 8 to infer, and then performs inference. output to section 8. Editing by the editing unit 5 includes, for example, converting simple numerical data stored in the data storage means 3 into propositional reasoning. Note that editing also includes the case where the numerical data is converted into numerical data in a different form from that stored in the first stage 3 of data storage. The knowledge section 6 stores knowledge regarding hardware, that is, equipment knowledge in advance. knowledge department 6
Examples of equipment knowledge stored by the system include information regarding the overall configuration of various plants to be monitored, information regarding the configuration of each part of the plant, information regarding the electronic computer as a plant monitoring device, and information regarding the electrical system. It will be done. When the knowledge section 6 receives a data read request from the inference section 8, the knowledge section 6 obtains the equipment knowledge from the inference section 8. As described above, the condition unit 7 stores in advance operating conditions that are individually set for each of a plurality of tasks including a plurality of operating tasks. The above-mentioned operating conditions mainly refer to the operating timing of each task, such as the access timing of each task to common data. When the condition section 7 receives a data read request from the inference section 8, it sends the operating condition data to the inference section 8.

I can do it.

The reasoning unit 8 stores rules for determining whether or not processing is normally performed on common data accessed by each of the plurality of tasks described above in chronological order.

The inference unit 8 receives the edited data, equipment knowledge data, and operating condition data by issuing a data read request to the editing unit 5, knowledge unit 6, and condition unit 7, respectively, and determines the above-mentioned rules for determination. , based on the equipment knowledge data and the operating condition data, it is inferred whether the common data in the edited data is correct or not. Then, the inference result is given to the inference result output means 9.

The inference result output means 9 allows the operator to understand whether access to which common data from which task at which operation timing is normal or abnormal, based on the inference result given from the inference section 8. After clarification, it is output as pigeon copy 13 or soft copy 14.

Next, the work of detecting normality/abnormality of a plurality of tasks performed by applying the program defect detection apparatus having the above configuration will be described with reference to FIG.

Here, the knowledge unit 6 shown in FIG. 1 stores in advance the maximum value Xmaw of the common data a and the minimum value X of the common data a as equipment knowledge data. The condition section 7 contains the following as operating condition data:
Task A condition: It is assumed that accessing common data a is stored at timing b. Furthermore, the inference unit 8 has I
It is assumed that the following contents are defined in the F-THEN format.

1F (common data a changes from X to X') and (timing is when b) and (accessed task is A) and (X,
≦X' ≦X ) mln InaXHEN (Task A's processing of common data a at timing b is normal) Under the above-mentioned premise, process history data collection means 1 collects process history data 2 as shown in FIG.
1 and the common data change result 22 as shown in FIG. ,
It is determined that the processing of task A is normal. The determination result of the validity of the processing of task A on the common data a at the timing b, determined by the inference unit 8 based on the conditions described above, is provided to the inference result output means 9. Then, from the inference result output means 9, the above judgment result is outputted to the hard copy 13 or the soft copy 1 in the manner described above.
It will be output as 4.

As explained above, according to an embodiment according to the present invention,
When accessing common data from multiple tasks, it is possible to significantly reduce the time required to confirm the validity of the processing of various tasks under various operating conditions (operation timings), reducing the risk of missing confirmation. It was also possible to avoid it.

〔Effect of the invention〕

As explained above, according to the present invention, the storage means stores the first reference data for determining the normality/abnormality of the common data obtained as a result of each task operating in chronological order according to its respective operating conditions. , an operating condition of each task, a method of accessing the common data of each task, and second reference data for determining normality/abnormality of processing operation after accessing the common data of each task, and the determining means stores: , common data, operating conditions when each task operates, how each task accesses the common data, and information regarding processing operations after each task accesses the common data, when these information is provided from the outside. Since we decided to determine the normality/abnormality of each task from the above-mentioned first and second reference data, common data of each task forming this system in a large-scale system built inside a computer. It is possible to provide a program malfunction detection device that can efficiently and reliably perform the task of determining whether or not the access method, processing operation, etc. are normal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of a program defect detection device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the overall configuration of a program defect detection device according to an embodiment of the present invention. FIG. 6 is an explanatory diagram of the operation when performing normality/abnormality detection work for a plurality of internally constructed tasks. DESCRIPTION OF SYMBOLS 1... Process history data collection means, 2... Common data collection means, 3... Data storage means, 4... Judgment processing means, 5... Editorial department, 6... Knowledge department, 7 ...
Condition part, 8... Inference part, 9... Inference result output means,
10...Program defect detection device, 11...Process history data, 12...Common data change results,
13... Bar 5 6 Docopy, 14... Soft copy, ]00... Electronic = 1 Computer system main body.

Claims (1)

[Scope of Claims] A program malfunction detection device for detecting normality/abnormality of a plurality of tasks, each of which operates in chronological order according to individually set operating conditions, First reference data for determining normality/abnormality of common data obtained as a result of sequential operations, operating conditions of each task, how to access common data of each task, and access to common data of each task a storage means for storing second reference data for determining normality/abnormality of subsequent processing operations; and storage means for storing common data, operating conditions when each task operates, how each task accesses the common data, and information about tasks. determining means for determining whether each task is normal or abnormal based on the information and the first and second reference data when information regarding processing operations after accessing the common data is provided from the outside; A program defect detection device characterized by: