JP2018022262A - Control system and access examination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To examine access from a higher hierarchy of a control system to input/output equipment of a lower hierarchy.SOLUTION: An examination device E comprises: a data extraction part 40 for, by referring to a database 10 of a host device A1 belonging to a higher hierarchy, creating a list indicating a data request destination device and requested data for each host device and for each application program mounted on the host device; a correspondence relation acquisition part 41 for acquiring a correspondence relation between data requested to a gateway device B1 by the device belonging to the higher hierarchy and data of input/output equipment connected to salve devices C1 to C3 belonging to a lower hierarchy from a database 20 of the gateway device B1; and a correspondence table creation part 42 for creating a correspondence table of the application program mounted on the host device A1 and the data of the input/output equipment connected to the slave devices C1 to C3 for each host device and for each application program.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for investigating access from an upper hierarchy to an input / output device in a lower hierarchy in a hierarchical control system.

The control system will continue to be used while being remodeled for over 10 years since its introduction. The data processing amount of each device on the system increases from the beginning of introduction as the years pass, and there is often a need to divide one device.
Each device is provided with some indicators that can dynamically check the amount of data to be processed, and it is possible to know which device has a large data processing amount. However, in the case of a distributed (hierarchized) control system, information held by devices at the same hierarchical level can be shared, but information held by devices at different hierarchical levels cannot be seen (see Patent Document 1).

  For example, in the control system shown in FIG. 17, the device 100-1 passes through the device 100-2 and the device 101 located in the network layer L 1 at the same level, and the device 102-1 located in the network layer L 2 at a different level. , 102-2, and 102-3, the data of the terminal input / output devices are used to perform advanced control. The device 104 is a human machine interface for operating and operating the control system. The device 101 is a device that converts data of the network layers L1 and L2. In such a control system, the devices 100-1 and 102 cannot check access to input / output devices of different network layers.

JP 2011-48826 A

  As described above, in the conventional distributed control system, since there is no means for examining the correlation between the data request amount from the host device to the terminal device and the data amount processed by the terminal device, a division specification of the device is proposed. In some cases, it relied heavily on the experience of specific engineers.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a control system and an access investigation method capable of investigating access from a higher hierarchy to a lower hierarchy input / output device. To do.

  The present invention is a control system comprising a survey device for investigating access from a higher hierarchy of a control system to an input / output device of a lower hierarchy, wherein the survey device stores a database of higher devices belonging to the upper hierarchy of the control system. Referring to the data extraction means for creating a list indicating the data request destination device and the requested data for each upper device and for each application program installed in the upper device, and the device belonging to the upper hierarchy of the control system is higher. Correspondence of acquiring from the database of the gateway device the correspondence relationship between the data requested to the gateway device connecting the hierarchy and the lower hierarchy of the control system and the data of the input / output device connected to the lower hierarchy device belonging to the lower hierarchy A relationship acquisition unit; a list created by the data extraction unit; and a correspondence relationship acquired by the correspondence acquisition unit. The correspondence table creating means for creating the correspondence table between the application program installed in the host device and the data of the input / output device connected to the lower device for each host device and each application program installed in the host device Are provided.

  Further, in one configuration example of the control system of the present invention, the gateway device further includes an access amount measuring unit that measures an access amount per unit time from other devices belonging to an upper layer of the control system for each data, Out of the access amount measured by the access amount measuring means, information output means for outputting information indicating access amount data exceeding a threshold set by the investigation device, the investigation device comprising: A threshold setting unit configured to set the threshold for the information output unit, wherein the correspondence table creating unit of the investigation device includes the list created by the data extracting unit, the correspondence obtained by the correspondence obtaining unit, and the gateway device Based on the information output by the information output means, the gateway among the application programs installed in the host device. Creates a correspondence table between application programs whose amount of access to the device per unit time exceeds the threshold and data of input / output devices connected to the lower devices for each upper device and each application program installed in the upper device It is characterized by doing.

  Further, in one configuration example of the control system of the present invention, the gateway device further includes an access amount measuring unit that measures, for each data, an access amount per unit time to a lower device belonging to a lower hierarchy to the control system, Out of the access amount measured by the access amount measuring means, information output means for outputting information indicating access amount data exceeding a threshold set by the investigation device, the investigation device comprising: A threshold setting unit configured to set the threshold for the information output unit, wherein the correspondence table creating unit of the investigation device includes the list created by the data extracting unit, the correspondence obtained by the correspondence obtaining unit, and the gateway device Based on the information output by the information output means, of the application programs installed in the higher-level device, to the lower-level device Creating a correspondence table between the application program whose access amount per unit time exceeds the threshold and the data of the input / output device connected to the lower level device for each higher level device and each application program installed in the higher level device. It is a feature.

  Further, in one configuration example of the control system of the present invention, the gateway device further includes an access amount measuring unit that measures an access amount per unit time from other devices belonging to an upper layer of the control system for each data, An information output unit that outputs information indicating access amount data that is less than a threshold set by the investigation device among access amounts measured by the access amount measurement unit, and the investigation device includes information on the gateway device. A threshold setting unit configured to set the threshold for the output unit, the correspondence table creating unit of the investigation device includes a list created by the data extracting unit, a correspondence obtained by the correspondence obtaining unit, and the gateway device Based on the information output by the information output means, of the application programs installed in the host device, the gateway A correspondence table between an application program whose amount of access to a device per unit time is below the threshold and data of an input / output device connected to a lower device is created for each higher device and each application program installed in the higher device. It is characterized by this.

  Further, in one configuration example of the control system of the present invention, the gateway device further includes an access amount measuring unit that measures, for each data, an access amount per unit time to a lower device belonging to a lower hierarchy to the control system, An information output unit that outputs information indicating access amount data that is less than a threshold set by the investigation device among access amounts measured by the access amount measurement unit, and the investigation device includes information on the gateway device. A threshold setting unit configured to set the threshold for the output unit, the correspondence table creating unit of the investigation device includes a list created by the data extracting unit, a correspondence obtained by the correspondence obtaining unit, and the gateway device Based on the information output by the information output means, the application program implemented in the higher-level device is transferred to the lower-level device. A correspondence table between an application program whose access amount per unit time is less than the threshold and data of input / output devices connected to the lower device is created for each upper device and each application program installed in the upper device. It is what.

  Further, the access investigation method of the present invention refers to a list of data request destination devices and requested data by referring to the database of the upper device belonging to the upper layer of the control system by the investigation device, for each upper device and the upper device. A data extraction step created for each application program installed in the device, and data requested by the investigation device to the gateway device connecting the upper layer to the lower layer of the control system by the device belonging to the upper layer of the control system; A correspondence relationship acquisition step of acquiring a correspondence relationship with data of an input / output device connected to a lower device belonging to a lower hierarchy from the database of the gateway device; and the list created by the investigation device in the data extraction step; Based on the correspondence acquired in the correspondence acquisition step, the application implemented in the host device is used. Including a correspondence table creation step for creating a correspondence table between the application program and the data of the input / output devices connected to the lower device for each upper device and for each application program installed in the upper device. is there.

  According to the present invention, by providing the data extraction means, the correspondence acquisition means, and the correspondence table creation means, it is possible to create a correspondence table between the upper layer application program and the lower layer input / output device data. It is possible to check which input / output device the application program is requesting data for, and the user using the investigation device can input and output the data request amount from the upper device to the terminal input / output device. The correlation with the amount of data processed by the device can be examined. In the present invention, it is possible to specify on the desk which device in the lower layer the access amount of the device in the upper layer is higher without stopping the upper device or the gateway device or modifying the software.

  In the present invention, the access amount per unit time from other devices belonging to the upper layer of the control system is measured by the gateway device, and information indicating the access amount data exceeding the threshold is output from the gateway device. It is possible to identify a data request source device and an application program that have a large access load to the gateway device, and to check which input / output device in the lower hierarchy the application program requests data for .

  In the present invention, the gateway device measures the access amount per unit time to the lower-level devices belonging to the lower hierarchy to the control system, and outputs information indicating the access amount data exceeding the threshold value from the gateway device. It is possible to identify a data request source device and an application program that have a high access load to the lower device, and to check which input / output device in the lower hierarchy the application program requests data for .

  In the present invention, the gateway device measures the access amount per unit time from other devices belonging to the upper layer of the control system, and outputs information indicating the access amount data below the threshold from the gateway device, It is possible to identify a data requesting device and an application program that have not accessed the gateway device at all for a certain period of time or have a low access frequency. As a result, it is possible to identify data that is estimated to be unnecessary in operating the control system, and to organize and simplify the enlarged data.

  In the present invention, the gateway device measures the access amount per unit time to the lower device belonging to the lower hierarchy to the control system, and outputs information indicating the access amount data below the threshold from the gateway device, It is possible to specify a data requesting device and an application program that have not accessed any lower-level devices at all for a certain period of time or have a low access frequency.

It is a block diagram which shows the structure of the control system which concerns on the 1st Embodiment of this invention. It is a figure explaining the outline of the data and process which each apparatus of the control system which concerns on the 1st Embodiment of this invention has. It is a flowchart explaining operation | movement of the investigation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the process result of the data extraction part of the investigation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the process result of the correspondence acquisition part of the investigation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the process result of the corresponding | compatible table preparation part of the investigation apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the control system which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the process result of the data extraction part of the investigation apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows another example of the process result of the data extraction part of the investigation apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the processing result of the correspondence acquisition part of the investigation apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the process result of the corresponding | compatible table preparation part of the investigation apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the control system which concerns on the 3rd Embodiment of this invention. It is a flowchart explaining operation | movement of the access amount measurement part and information output part of the gateway apparatus which concern on the 3rd Embodiment of this invention. It is a figure explaining operation | movement of the information output part of the gateway apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the process result of the information output part of the gateway apparatus which concerns on the 3rd Embodiment of this invention. It is a flowchart explaining operation | movement of the investigation apparatus which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the structure of the conventional hierarchical control system.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a control system according to the first embodiment of the present invention. The control system according to the present embodiment includes an upper device A1 belonging to the network layer L1 (upper layer) and an input / output device AI01, AI02, AO01, AO02, DI01, DI02, DO01, belonging to the network layer L2 (lower layer). DO02, DI03, DI04, DO03, DO04, lower devices C1 to C3, gateway device B1 that converts data in network layers L1 and L2, and access from the upper layer of the control system to lower layer input / output devices And a survey device E for surveying. Examples of input / output equipment include equipment such as air conditioning equipment, lighting equipment, water supply / drainage equipment, elevator equipment, power receiving / transforming equipment, crime prevention equipment, and disaster prevention equipment.

  The host device A1 includes a database 10 for storing information, an application execution unit 11 that executes an application program, and a communication processing unit 12 for communication with other devices belonging to the network hierarchy L1.

  The gateway device B1 includes a database 20 for storing information, a conversion processing unit 21 that performs data conversion between the network layers L1 and L2, and a communication processing unit for communication with other devices belonging to the network layer L1. 22 and a communication processing unit 23 for communication with other devices belonging to the network hierarchy L2.

  The lower-level devices C1 to C3 respectively communicate a request processing unit 30 that processes a request from the higher-level device A1, a communication processing unit 31 for communication with other devices belonging to the network hierarchy L2, and communication with input / output devices. A communication processing unit 32.

  The investigation device E refers to the database of the upper device A1, and the data extraction unit 40 that creates a list indicating the data request destination device and the requested data, and the device belonging to the upper hierarchy requests the gateway device B1. Correspondence acquisition unit 41 that acquires the correspondence between the data to be processed and the data of the input / output devices connected to the lower devices C1 to C3 from the database of the gateway device B1, and the application program and lower device installed in the upper device A1 A correspondence table creation unit 42 that creates a correspondence table with data of input / output devices connected to C1 to C3, and an output unit 43 that outputs a correspondence table created by the correspondence table creation unit 42 are provided.

  First, the outline of data and processing which each device of the control system of this embodiment has will be described with reference to FIG. Various application programs for performing advanced control are mounted on the host device A1. Here, it is assumed that application program Al-101 and application program Al-102 are installed.

  The host apparatus A1 stores in the database 10 the names of data required for other apparatuses belonging to the same network hierarchy L1 as the host apparatus A1 by the operations of the application programs Al-101 and Al-102. In the example of FIG. 2, “B1-001” and “B1-002” are registered in the database 10 as the names of data requested to other devices by the operation of the application program Al-101, and also by the application program Al-102. “B1-001”, “B1-111”, and “B1-112” are registered in the database 10 as names of data requested to other apparatuses by operation. Note that “B1” at the head of the data name indicates that the request destination device is the gateway device B1.

  The application execution unit 11 of the host device A1 operates in accordance with the application programs Al-101 and Al-102, and requests data of names registered in the database 10 from other devices through the communication processing unit 12.

  The gateway device B1 stores a conversion list between an address name that identifies input / output devices connected to the lower devices C1 to C3 belonging to the network layer L2 and a data name requested by another device belonging to the network layer L1 in the database 20. I remember it. The gateway device B1 belongs to the same network layer L1 as the higher-level device A1.

  When the conversion processing unit 21 of the gateway device B1 receives, for example, a data request whose data name is “B1-001” from the higher-level device A1 through the communication processing unit 22, the conversion processing unit 21 refers to the database 20 and the received data request has an address name. The data request is converted into a data request “C1-AI01”, and the data request is sent to the lower apparatus C1 through the communication processing unit 23.

  When the conversion processing unit 21 receives a response (data) from the lower-level device C1 through the communication processing unit 23, the conversion processing unit 21 refers to the database 20 and converts the received data into data whose data name is “B1-001”. The data is returned to the requesting host apparatus A1 through the communication processing unit 22.

  In response to the data request with the address name “C1-AI01” from the gateway device B1 received through the communication processing unit 31, the request processing unit 30 of the subordinate device C1 receives the data of the input / output device AI01 corresponding to this address name. Is returned to the requesting gateway device B1 through the communication processing unit 32. The same applies to the other lower devices C2 and C3.

  Next, operation | movement of the investigation apparatus E of this Embodiment is demonstrated with reference to FIG. First, the data extraction unit 40 of the investigation device E refers to the database 10 of the host device A1 and creates a list indicating the data request destination device and the requested data for each application program installed in the host device A1. Create (step S100 in FIG. 3).

FIG. 4 is a diagram illustrating an example of the processing result of the data extraction unit 40. In the example of FIG. 4, “B1-001”, “B1-002”, “A2” are used as information indicating the request destination device to which the host device A1 requests data and the requested data when the application program Al-101 is executed. -001 "is extracted, and information indicating the request destination apparatus and the requested data that the host apparatus A1 requests data when the application program Al-102 is executed is" B1-001 "," B1-111 "," B1-112 "has been extracted.
The data extraction unit 40 performs the above processing for each higher-level device belonging to the network hierarchy L1.

  Subsequently, the correspondence acquisition unit 41 of the investigation device E sends the data requested by another device belonging to the same network layer L1 as the gateway device B1 to the gateway device B1 and the lower devices C1 to C3 belonging to the network layer L2. The correspondence relationship with the data of the connected input / output device is acquired from the database 20 of the gateway device B1 (step S101 in FIG. 3).

  FIG. 5 is a diagram illustrating an example of a processing result of the correspondence acquisition unit 41. In the example of FIG. 5, the correspondence between data, specifically, the correspondence between the data name requested to the gateway device B1 and the address name indicating the input / output devices connected to the lower devices C1 to C3 is extracted. ing. For example, data whose data name is “B1-001” corresponds to data whose address name is “C1-AI01”.

  Next, the correspondence table creation unit 42 of the survey device E, based on the list created by the data extraction unit 40 and the correspondence acquired by the correspondence acquisition unit 41, and the application program installed in the upper device and the lower devices C1 to C1. A correspondence table with the data of the input / output devices connected to C3 is created for each host device and for each application program installed in the host device (step S102 in FIG. 3).

  FIG. 6 is a diagram illustrating an example of the processing result of the correspondence table creation unit 42. According to FIG. 6, it can be seen that, for example, the application program A1-101 accesses data of the input / output device specified by the address names “C1-AI01” and “C1-AO01”.

  The output unit 43 of the investigation device E outputs the correspondence table created by the correspondence table creation unit 42 (step S103 in FIG. 3). Examples of the output method include display of a correspondence table and transmission of the correspondence table to the outside.

  As described above, according to the present embodiment, a correspondence table between an upper layer application program and lower layer input / output device data can be created. It is possible to check whether data is requested, and the user who uses the survey device E checks the correlation between the amount of data requested from the host device to the terminal input / output device and the amount of data processed by the input / output device. Can do. In the present embodiment, since the database of the higher-level device and the gateway device is extracted and used outside, the higher-level device is the lower-level device without stopping the higher-level device or gateway device or modifying the software. It can be specified on the desk whether the access amount is large.

  Plant control devices are basically unable to shut down the device during operation. For this reason, in a control system operating through repeated incremental modifications, it is necessary to consider load distribution without stopping the system in future modification plans. Therefore, it is very useful to be able to examine the load concentration information from the system database.

  In the present embodiment, the upper apparatus A1 has been described as an example of the apparatus belonging to the upper hierarchy, but the present invention is not limited to this, and the present invention is also applied to other apparatuses belonging to the upper hierarchy. Is possible. Examples of other devices include a human machine interface device for operating and operating a control system, and a history device for collecting plant data. An operation screen database is mounted on the human machine interface device, and a history definition database is mounted on the history device.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the first embodiment, an example of a control system that requests data between devices having a two-level hierarchical structure has been described. However, a control system that requests data between devices having three or more hierarchical structures, or the same hierarchy However, the present invention can also be applied to a control system that requests data to a lower layer via a multistage device.

  FIG. 7 is a block diagram showing a configuration of a control system according to the second embodiment of the present invention. In the example of FIG. 7, the upper device A1 accesses the gateway device B2 via the upper device A2 belonging to the same network layer L1, and accesses the input / output device AI01 of the lower device C11 via the gateway device B2. Show.

  The configurations of the host devices A1 and A2, the gateway device B2, and the lower device C11 are the same as those in the first embodiment, and will be described using the reference numerals in FIG. Here, it is assumed that the application program A1-101 is installed in the host device A1, and the application program A2-001 is installed in the host device A2. The configuration of the investigation device E is also as described in the first embodiment.

The application execution unit 11 of the host apparatus A1 operates in accordance with the application program Al-101, and requests the host apparatus A2 for the name data registered in the database 10 of the host apparatus A1.
When the application execution unit 11 of the host apparatus A2 operates in accordance with the application program A2-101 and receives a data request from the host apparatus A1, in response to this request, the data of the name registered in the database 10 of the host apparatus A2 is obtained. Request to gateway device B2.

  When receiving the data request from the host device A2, the conversion processing unit 21 of the gateway device B2 refers to the database 20 of the gateway device B2 and converts the received data request into a data request to the corresponding lower device C11. A data request is sent to the lower-level device C11. When the conversion processing unit 21 receives a response (data) from the lower-level device C11, the conversion processing unit 21 refers to the database 20, converts the received data into data for the corresponding higher-level device A2, and converts this data to the higher-level request source. Return to device A2.

  In response to the data request from the gateway device B2, the request processing unit 30 of the subordinate device C11 returns the data of the input / output device AI01 corresponding to the address name included in the data request to the requesting gateway device B2.

Next, operation | movement of the investigation apparatus E of this Embodiment is demonstrated. Also in the present embodiment, the flow of processing is the same as in the first embodiment, and therefore, description will be made using the reference numerals in FIG.
The data extraction unit 40 of the investigation device E refers to the database 10 of the host device A1 and creates a list indicating the data request destination device and the requested data for each application program installed in the host device A1 ( FIG. 3 step S100).

  FIG. 8 is a diagram illustrating an example of a processing result of the data extraction unit 40 for the host apparatus A1. “A2-001” at the head of the data name indicates that the request destination device (application program) is the application program A2-001 of the host device A2.

As described in the first embodiment, the data extraction unit 40 performs processing for each higher-level device belonging to the network hierarchy L1.
Therefore, the data extraction unit 40 then refers to the database 10 of the host device A2 and creates a list indicating the data request destination device and the requested data for each application program installed in the host device A2 ( Step S100).

  When the host device A2 mediates the data request of the host device A1 as in the present embodiment, the data name of the request source together with the name of the data requested from the other device is the host device A2 for each application program. Are previously registered in the database 10. Therefore, the processing result of the data extraction unit 40 for the host device A2 includes the data name of the request source as shown in FIG.

  Subsequently, the correspondence acquisition unit 41 of the investigation device E receives data requested by another device belonging to the same network hierarchy L1 as the gateway device B1 to the gateway device B1, and data of input / output devices connected to the lower devices. Is acquired from the database 20 of the gateway device B1 (step S101 in FIG. 3). FIG. 10 is a diagram illustrating an example of a processing result of the correspondence acquisition unit 41.

  Next, as in the first embodiment, the correspondence table creation unit 42 of the investigation device E creates a correspondence table between the application program installed in the higher-level device and the data of the input / output devices connected to the lower-level device. It is created for each host device and for each application program installed in the host device (step S102 in FIG. 3). Here, the association between the application program A1-101 of the host apparatus A1 and the application program A2-001 of the host apparatus A2 is based on the list created by the data extraction unit 40 for each of the application programs A1-101, A2-001. Done.

FIG. 11 is a diagram illustrating an example of the processing result of the correspondence table creation unit 42. As can be seen from FIG. 11, for example, the application program A1-101 accesses the data of the input / output device specified by the address name “C11-AI01” via the application program A2-001.
The operation of the output unit 43 of the investigation device E is as described in the first embodiment.

  In this way, in this embodiment, even when data is requested to a lower hierarchy via a multi-stage device, the correlation of each data can be extracted.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. In order to specify the details of the requesting device requesting the data from the load during system operation and the peak of data processing amount, it is necessary to modify the device software. However, it is difficult to update the software of all devices in the operating control system. Therefore, by adding the following means only to gateway devices that connect layers, it is possible to identify gateway devices that connect layers where data processing is likely to be concentrated, and to correlate the access amount of lower layer devices with the data requesting device. It is possible to investigate the relationship.

  FIG. 12 is a block diagram showing a configuration of a control system according to the third embodiment of the present invention. The gateway device B1 of the present embodiment is an access that measures the access amount per unit time for each data from the database 20, the conversion processing unit 21, the communication processing units 22 and 23, and other devices belonging to the upper layer. An amount measurement unit 24 and an information output unit 25 that outputs information indicating access amount data exceeding the threshold set by the investigation device E among the access amounts measured by the access amount measurement unit 24 are provided.

The investigation device E according to the present embodiment has a threshold for the amount of access to the data extraction unit 40, the correspondence acquisition unit 41, the correspondence table creation unit 42a, the output unit 43, and the information output unit 25 of the gateway device B1. And a threshold value setting unit 44 for setting.
The configurations of the host devices A1 and A2 and the lower device C1 are as described in the first embodiment.

Next, the operation of the control system of this embodiment will be described. FIG. 13 is a flowchart for explaining the operations of the access amount measurement unit 24 and the information output unit 25 of the gateway device B1.
The access amount measuring unit 24 of the gateway device B1 measures the access amount per unit time from other devices belonging to the same network layer L1 as the gateway device B1 for each data (step S200 in FIG. 13). The access amount measuring unit 24 is an existing means. That is, the gateway device B1 already has a function of measuring and displaying the access amount.

  The information output unit 25 of the gateway device B1 outputs information indicating access amount data exceeding the threshold set by the threshold setting unit 44 of the investigation device E among the access amounts measured by the access amount measuring unit 24 ( FIG. 13 step S201). In the example of FIG. 14, since the access amount exceeds the threshold during the unit time from the time t1 to the time t2, data information with a large access amount is output. Note that the unit time of the measurement target may be specified from, for example, the correspondence table creation unit 42a of the investigation device E, or the gateway device B1 may repeatedly perform the process of FIG. 13 every unit time.

  FIG. 15 is a diagram illustrating an example of a processing result of the information output unit 25. The information output unit 25 outputs information (specifically, data name) of data whose access amount exceeds the threshold for each device and application program that accessed the gateway device B1. In the example of FIG. 15, for example, the access amount of the data whose data names are “B1-001” and “B1-002” out of the data whose request source is the application program A1-101 of the host apparatus A1 has exceeded the threshold value. I understand.

FIG. 16 is a flowchart for explaining the operation of the investigation apparatus E according to the present embodiment. As described above, the threshold setting unit 44 of the investigation device E sets a threshold for the information output unit 25 of the gateway device B1 (step S104 in FIG. 16).
The operations (steps S100 and S101 in FIG. 16) of the data extraction unit 40 and the correspondence relationship acquisition unit 41 of the investigation device E are as described in the first embodiment.

  Based on the list created by the data extraction unit 40, the correspondence obtained by the correspondence obtaining unit 41, and the information output by the information output unit 25 of the gateway device B1, the correspondence table creating unit 42a of the investigation device E Among the installed application programs, the correspondence table between the application program whose access amount per unit time to the gateway device B1 exceeds the threshold and the data of the input / output device connected to the lower device is shown for each upper device and upper device. For each application program installed in the server (step S102a in FIG. 16).

  In this embodiment, a correspondence table is not created for all data as in the first embodiment, but a correspondence table is created only for data with a large access amount. Therefore, even for the same application program, a correspondence table is not created for data with a small access amount per unit time to the gateway apparatus B1.

  As in the first embodiment, the output unit 43 of the investigation device E outputs the correspondence table created by the correspondence table creation unit 42a (step S103 in FIG. 16).

  As described above, in this embodiment, the access load on the gateway device B1 is measured by measuring the access amount using the function already provided in the gateway device B1 and extracting the data whose access amount exceeds the threshold. It is possible to identify a data requesting apparatus and an application program that are frequently used, and to check which input / output device in the lower hierarchy the application program requests data.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. In the third embodiment, an example in which the access load to the gateway device is large has been described. In the present embodiment, an example in which the access load to the lower device is large will be described. Also in the present embodiment, the configuration of the control system is the same as that of the third embodiment, and therefore, description will be made using the reference numerals in FIG.

  The access amount measuring unit 24 of the gateway device B1 measures the access amount per unit time to the lower devices belonging to the network layer L2 for each data (step S200 in FIG. 13). Similar to the third embodiment, the gateway device B1 already has a function of measuring and displaying such an access amount.

  As in the third embodiment, the information output unit 25 of the gateway device B1 accesses that exceed the threshold set by the threshold setting unit 44 of the investigation device E out of the access amount measured by the access amount measuring unit 24. Information indicating the quantity data is output (step S201 in FIG. 13).

  The operation of the investigation device E is the same as that of the third embodiment. In the present embodiment, the correspondence table creation unit 42a of the investigation device E adds the list created by the data extraction unit 40, the correspondence relationship obtained by the correspondence relationship obtaining unit 41, and the information output by the information output unit 25 of the gateway device B1. Based on the application program installed in the host device, the correspondence table between the application program whose access amount per unit time to the lower device exceeds the threshold and the data of the input / output device connected to the lower device It is created for each device and for each application program installed in the host device (step S102a in FIG. 16).

  Thus, in the present embodiment, the access request is measured using the function already provided in the gateway device B1, and the data whose access load exceeds the threshold is extracted, so that a data request with a large access load to the lower device is performed. The original device and the application program can be identified, and it is possible to check to which input / output device in the lower hierarchy the application program requests data.

  In the third embodiment, the information output unit 25 of the gateway device B1 has an access amount that is less than the threshold set by the threshold setting unit 44 of the investigation device E among the access amounts measured by the access amount measuring unit 24. Information indicating the data may be output. At this time, if the threshold set by the threshold setting unit 44 is set to a value lower than the threshold set in the third embodiment, the gateway device B1 is not accessed at all for a certain period of time, or the access frequency is It is possible to identify a low data request source device and an application program. As a result, it is possible to identify data that is estimated to be unnecessary when operating the plant control apparatus, and to organize and simplify the enlarged data.

  Similarly, in the fourth embodiment, the information output unit 25 may output information indicating access amount data less than a threshold value. At this time, if the threshold set by the threshold setting unit 44 is set to a value lower than the threshold set in the fourth embodiment, the lower-level device is not accessed at all for a certain period or the access frequency is low. It is possible to identify the data requesting device and the application program.

  The investigation device E described in the first to fourth embodiments can be realized by a computer having a CPU (Central Processing Unit), a storage device, and an interface, and a program for controlling these hardware resources. The CPU executes the processes described in the first to fourth embodiments in accordance with a program stored in the storage device.

  The present invention can be applied to a hierarchical control system.

  A1, A2 ... upper device, B1, B2 ... gateway device, C1-C3, C1 ... lower device, E ... investigation device, 10, 20 ... database, 11 ... application execution unit, 12, 22, 23, 31, 32 ... Communication processing unit, 21 ... conversion processing unit, 24 ... access amount measurement unit, 25 ... information output unit, 30 ... request processing unit, 40 ... data extraction unit, 41 ... correspondence acquisition unit, 42, 42a ... correspondence table creation unit , 43 ... output unit, 44 ... threshold setting unit, AI01, AI02, AO01, AO02, DI01, DI02, DO01, DO02, DI03, DI04, DO03, DO04 ... input / output devices.

Claims (10)

A control system having an investigation device for investigating access from a higher hierarchy to a lower hierarchy input / output device.
The investigation device
Data extraction means for creating a list indicating a data request destination device and requested data by referring to the database of the upper device belonging to the upper hierarchy of the control system for each upper device and for each application program installed in the upper device When,
The correspondence between the data requested by a device belonging to the upper layer of the control system to the gateway device that connects the upper layer and the lower layer of the control system and the data of the input / output devices connected to the lower device belonging to the lower layer A correspondence acquisition means for acquiring from the database of the gateway device;
Based on the list created by the data extraction means and the correspondence acquired by the correspondence acquisition means, a correspondence table between the application program installed in the host device and the data of the input / output devices connected to the lower device A control system comprising: correspondence table creation means for creating each device and each application program installed in a host device. The control system according to claim 1,
Furthermore, the gateway device includes:
Access amount measuring means for measuring the access amount per unit time from other devices belonging to the upper layer of the control system for each data;
Among the access amounts measured by the access amount measuring means, the information output means for outputting information indicating access amount data exceeding a threshold set from the investigation device,
The investigation device includes a threshold setting unit that sets the threshold for the information output unit of the gateway device,
The correspondence table creation means of the investigation device is mounted on the host device based on the list created by the data extraction means, the correspondence relation obtained by the correspondence relation acquisition means, and the information output by the information output means of the gateway device. Among the application programs, the correspondence table between the application program whose access amount per unit time to the gateway device exceeds the threshold and the data of the input / output device connected to the lower device is installed in each upper device and upper device. A control system characterized by being created for each application program. The control system according to claim 1,
Furthermore, the gateway device includes:
An access amount measuring means for measuring, for each data, an access amount per unit time to a lower-level device belonging to a lower layer to the control system;
Among the access amounts measured by the access amount measuring means, the information output means for outputting information indicating access amount data exceeding a threshold set from the investigation device,
The investigation device includes a threshold setting unit that sets the threshold for the information output unit of the gateway device,
The correspondence table creation means of the investigation device is mounted on the host device based on the list created by the data extraction means, the correspondence relation obtained by the correspondence relation acquisition means, and the information output by the information output means of the gateway device. Among the application programs, the correspondence table between the application program whose amount of access to the lower-level device per unit time exceeds the threshold and the data of the input / output device connected to the lower-level device is installed in each higher-level device and higher-level device. A control system characterized by being created for each application program. The control system according to claim 1,
Furthermore, the gateway device includes:
Access amount measuring means for measuring the access amount per unit time from other devices belonging to the upper layer of the control system for each data;
Out of the access amount measured by the access amount measuring means, the information output means for outputting information indicating the data of the access amount below the threshold set from the investigation device,
The investigation device includes a threshold setting unit that sets the threshold for the information output unit of the gateway device,
The correspondence table creation means of the investigation device is mounted on the host device based on the list created by the data extraction means, the correspondence relation obtained by the correspondence relation acquisition means, and the information output by the information output means of the gateway device. Among the application programs, the correspondence table between the application program whose access amount per unit time to the gateway device is less than the threshold and the data of the input / output device connected to the lower device is implemented for each upper device and the upper device. A control system created for each application program. The control system according to claim 1,
Furthermore, the gateway device includes:
An access amount measuring means for measuring, for each data, an access amount per unit time to a lower-level device belonging to a lower layer to the control system;
Out of the access amount measured by the access amount measuring means, the information output means for outputting information indicating the data of the access amount below the threshold set from the investigation device,
The investigation device includes a threshold setting unit that sets the threshold for the information output unit of the gateway device,
The correspondence table creation means of the investigation device is mounted on the host device based on the list created by the data extraction means, the correspondence relation obtained by the correspondence relation acquisition means, and the information output by the information output means of the gateway device. Among the application programs, the correspondence table between the application program whose access amount per unit time to the lower-level device is below the threshold and the data of the input / output device connected to the lower-level device is implemented for each higher-level device and the higher-level device. A control system created for each application program. The investigation device refers to the database of the upper device belonging to the upper hierarchy of the control system, and creates a list indicating the data request destination device and the requested data for each upper device and each application program installed in the upper device. A data extraction step to
The investigation device requests data requested by a device belonging to an upper layer of the control system to a gateway device that connects the upper layer and the lower layer of the control system, and data of input / output devices connected to the lower device belonging to the lower layer A corresponding relationship acquisition step of acquiring the corresponding relationship from the database of the gateway device;
Based on the list created in the data extraction step and the correspondence acquired in the correspondence acquisition step, the investigation device uses the application program installed in the host device and the data of the input / output device connected to the lower device. The access investigation method characterized by including the correspondence table creation step which creates a correspondence table for every high-order apparatus and every application program mounted in the high-order apparatus. The access investigation method according to claim 6,
Further, the investigation device sets a threshold for the gateway device, a threshold setting step,
An access amount measuring step in which the gateway device measures an access amount per unit time from other devices belonging to an upper layer of the control system for each data;
The gateway device includes an information output step of outputting information indicating access amount data exceeding the threshold among the access amounts measured in the access amount measurement step,
The correspondence table creation step includes a list created in the data extraction step, a correspondence relationship acquired in the correspondence relationship acquisition step, and information output in the information output step. The correspondence table between the application program in which the access amount per unit time to the gateway device exceeds the threshold and the data of the input / output device connected to the lower device is displayed for each upper device and each application program installed in the upper device. An access investigation method comprising the steps of: The access investigation method according to claim 6,
Further, the investigation device sets a threshold for the gateway device, a threshold setting step,
An access amount measuring step in which the gateway device measures, for each data, an access amount per unit time to a lower device belonging to a lower layer to the control system;
The gateway device includes an information output step of outputting information indicating access amount data exceeding the threshold among the access amounts measured in the access amount measurement step,
The correspondence table creation step includes a list created in the data extraction step, a correspondence relationship acquired in the correspondence relationship acquisition step, and information output in the information output step. The correspondence table between the application program in which the amount of access to the lower device per unit time exceeds the threshold and the data of the input / output device connected to the lower device is displayed for each upper device and each application program installed in the upper device. An access investigation method comprising the steps of: The access investigation method according to claim 6,
Further, the investigation device sets a threshold for the gateway device, a threshold setting step,
An access amount measuring step in which the gateway device measures an access amount per unit time from other devices belonging to an upper layer of the control system for each data;
The gateway device includes an information output step of outputting information indicating access amount data less than the threshold among the access amounts measured in the access amount measurement step,
The correspondence table creation step includes a list created in the data extraction step, a correspondence relationship acquired in the correspondence relationship acquisition step, and information output in the information output step. The correspondence table between the application program whose amount of access to the gateway device per unit time is lower than the threshold and the data of the input / output device connected to the lower device for each upper device and each application program installed in the upper device An access investigation method comprising the step of creating. The access investigation method according to claim 6,
Further, the investigation device sets a threshold for the gateway device, a threshold setting step,
An access amount measuring step in which the gateway device measures, for each data, an access amount per unit time to a lower device belonging to a lower layer to the control system;
The gateway device includes an information output step of outputting information indicating access amount data less than the threshold among the access amounts measured in the access amount measurement step,
The correspondence table creation step includes a list created in the data extraction step, a correspondence relationship acquired in the correspondence relationship acquisition step, and information output in the information output step. The correspondence table between the application program whose amount of access to the lower device per unit time is lower than the threshold and the data of the input / output device connected to the lower device for each upper device and each application program installed in the upper device An access investigation method comprising the step of creating.

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