JP2004157824A - Plant monitoring control method and plant monitoring control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plant monitoring control method and system never causing a mismatch of data between a plant monitoring control device side and a mobile terminal side. <P>SOLUTION: When data listing of a plant 12 is requested from a mobile terminal 11, the data retrieval means 22 of a human interface 15 is operated by radio, the data retrieval result is transmitted to the mobile terminal 11 by radio, and common data with the human interface 15 are listed in the mobile terminal 11. Accordingly, the conformity of the data can be ensured. When the reading or writing of required data from the listed data is requested from the mobile terminal 11, the data access processing means 25 of the human interface 15 is operated by radio, and the processing result for such a request is transmitted to the mobile terminal 11 and displayed on the mobile terminal 11. Accordingly, the operation on the mobile terminal side 11 can be surely performed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and a system for monitoring and controlling a plant with a controller, a human interface that manages data held by the controller in a displayable manner, and a mobile terminal that exchanges data with the human interface wirelessly.
[0002]
[Prior art]
As a device for monitoring and controlling a plant such as water and sewage equipment, a monitoring and control device that collects information from the plant and controls the plant according to a preset program is provided in the center, and a mobile terminal is carried at the site, There has been proposed a system for performing inspection and adjustment while exchanging data with a supervisory control device (for example, see Patent Documents 1 and 2).
By the way, a recent plant monitoring and control system includes a controller that collects and controls plant data, a plant monitoring and control device having a human interface that manages the data held by the controller so that the data can be displayed, And a mobile terminal that transmits and receives data to monitor and control a plant.
In such a system, a monitoring human interface is installed in a central control room or the like, and performs monitoring control of the entire plant.
In such a plant monitoring and control system, when performing a plant maintenance operation on site, a tag indicating data of the plant on site using a mobile terminal wirelessly connected to a human interface provided in a central operation room. Is displayed, an operation is performed on this tag, and a maintenance operation is performed.
The tag indicating the data of the plant is set in the plant monitoring control device, and when displaying this tag on the mobile terminal, it is necessary to specify which tag on the plant monitoring control device is to be displayed. That is, a list of tags to be displayed on the mobile terminal is set in advance, and a tag is selected and displayed.
[0003]
[Patent Document 1]
JP-A-11-275111
[Patent Document 2]
JP-A-11-282523
[0004]
[Problems to be solved by the invention]
In such a system, when a tag is added or deleted on the plant monitoring control device side, it is necessary to correct the tag list information on the mobile terminal side. If this correction is not performed reliably, data inconsistency will occur, causing a problem in ensuring data consistency.
Also, when operating a tag on a mobile terminal, it is necessary to set whether to permit or prohibit operation from the mobile terminal due to the importance of the device. Such operation permission / prohibition settings are performed in the mobile terminal. Similarly, if tags are added or deleted on the plant monitoring control device side, the tag operation permission / prohibition setting information on the mobile terminal side also needs to be modified. There is a problem that causes data mismatch.
Further, when a tag is operated on a human interface in the plant monitoring and control device, the operation history is stored in a database in the plant monitoring and control device. This operation history is used to check later when and where the operation was performed. Similarly, the operation on the tag on the mobile terminal also needs to be stored in the operation history database.
The mobile terminal is wirelessly connected to the plant monitoring and control device to display and set data. However, since the mobile terminal is wireless, the communication state is greatly affected by the position of the mobile terminal. Therefore, it is necessary to make the mobile terminal operator judge the certainty of the displayed data.
[0005]
Further, the mobile terminal exchanges data via a gateway installed in the plant monitoring and control device in order to display and operate the data of the plant monitoring and control device. However, since the mobile terminal becomes unusable when the gateway goes down, a function to back up the gateway is required.
[0006]
An object of the present invention is to provide a plant monitoring control method and a plant monitoring control system that do not cause data mismatch between the plant monitoring control device side and the mobile side.
[0007]
Further, it is possible to provide a plant monitoring control method and system capable of storing data operation on the mobile terminal side in the operation history database, displaying the reliability of the communication state, and further enabling backup at the time of gateway down. There is also.
[0008]
[Means for Solving the Problems]
A plant monitoring control method according to the present invention comprises a controller that collects various data of a plant, a human interface that manages data held by the controller so that the data can be displayed, and a mobile terminal that exchanges data with the human interface and wirelessly. A method of monitoring and controlling the data, when a data list request of a plant is made by a mobile terminal, a data search means of a human interface is operated by wireless, and the data search result is wirelessly transmitted to the mobile terminal. When a data read request or a write request for desired data is made at the mobile terminal, the data access processing means of the human interface is operated wirelessly to respond to these requests. Processing result is sent to the mobile terminal by radio, characterized in that to be displayed on the mobile terminal.
[0009]
A plant monitoring and control system according to the present invention includes a controller that collects various data of a plant, a human interface that manages data held by the controller so that the data can be displayed, and a mobile terminal that exchanges data with the human interface by radio. The mobile terminal has a screen display processing means capable of inputting the plant data list request, the desired data read request and the write request, and a plant data list request and a desired data read request from the screen display processing means. Or a network processing means for transmitting, when a write request is input, these requests to the human interface and outputting the processing results to the screen display processing means when the processing results are transmitted from the human interface. And before A human interface, a data search processing unit for searching data stored in the controller, a data access unit for reading or writing desired data, and a data search unit for receiving a plant data list request from the mobile terminal. Operating the processing means, transmitting the search result to the mobile terminal, and, when there is a request for reading or writing the desired data from the mobile terminal, causing the data access processing means to execute these requests; Mobile terminal request processing means for transmitting a processing result to the mobile terminal.
[0010]
Further, in the present invention, plant data is divided into a plurality of monitoring groups, and the mobile terminal specifies an arbitrary monitoring group and requests a list of data allocated to the monitoring group. You may comprise.
[0011]
Further, in the present invention, the mobile terminal can designate an operation level for plant data, and the permitted operation is assigned to the operation level in advance, and the data access processing means is assigned to the operation level corresponding to the designated operation level. It may be configured to allow only the operation to be performed.
[0012]
In the present invention, when an operation on plant data is performed from a mobile terminal, an operation history database that records the operation history may be provided.
[0013]
Further, in the present invention, the mobile terminal may be provided with a display means for displaying the communication quality when data is exchanged with the human interface wirelessly.
[0014]
Further, in the present invention, a plurality of human interfaces functioning as a gateway to the mobile terminal may be provided, the mobile terminal may be selectively connected to the plurality of human interfaces wirelessly, and a backup at the time of the gateway down may be enabled.
[0015]
In these inventions, when a data list request of a plant is made at a mobile terminal, a data search means of a human interface is operated by wireless, the data search result is wirelessly transmitted to the mobile terminal, and the human interface Since a common data list is performed, data consistency can be ensured. Also, when a request to read or write desired data from the listed data is made at the mobile terminal, the data access processing means of the human interface is wirelessly operated, and the processing results for these requests are wirelessly transmitted to the mobile terminal. Since it is sent and displayed on the mobile terminal, the operation on the mobile terminal side can be performed reliably.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a plant monitoring control method and a plant monitoring control system according to the present invention will be described with reference to the drawings.
[0017]
FIG. 1 shows a system configuration example showing a plant monitoring control system including a mobile terminal 11. This plant monitoring and control system includes a mobile terminal 11 and a plant monitoring and control device 13 for directly monitoring and controlling the plant 12.
[0018]
The plant monitoring control device 13 includes a controller 14 that collects and controls data of the plant 12, and a human interface 15 that manages the data in a displayable state. Further, the plant monitoring control device 13 is configured to be connectable to the mobile terminal 11 via a wireless base station 16 by wireless (wireless LAN).
[0019]
The human interface 15 manages data in the controller 14 as tags and performs display in tag units. The mobile terminal 11 installs the aforementioned wireless LAN separately from the LAN to which the human interface 15 and the controller 14 are connected, and performs data communication with the wireless base station 16. Therefore, the data display of the tag managed by the human interface can be performed on the mobile terminal 11. The human interface 15 also functions as a gateway for the mobile terminal 11.
[0020]
FIG. 2 and FIG. 3 are block diagrams for explaining functions executed in this embodiment.
[0021]
FIG. 2 is a functional block diagram of the screen display processing by the human interface 15 alone. The screen display processing means 21 has a function of inputting various data processing functions and displaying the processing results. The data search processing means 22 searches various data of the plant set in the controller 14 via the network processing means 23 in tag units. When a data search request is input by the screen display processing means 21, the data search processing is executed, and the search results are extracted in the form of a list and output to the screen display processing means 21.
[0022]
The data access unit 25 performs a read (Read) process 25a or a write (Write) process 25b on the specified data via the network processing unit 23. That is, when a read or write request for a desired tag is input from the screen display processing unit 21 based on the data searched and listed as described above (hereinafter described as a tag), the read process 25a is used. To acquire and display the tag data. When a tag data write request is input, tag data is written using the write processing 25b.
[0023]
When data is written to a tag by the write processing 25b, it is necessary to save the history. For this purpose, an operation history storage unit 26 is provided, and the operation history (data writing has been performed) is stored in the operation history database in the disk 27. The stored operation history is read and displayed by the operation history reading means 28 in response to a read instruction by the screen display processing means 21.
[0024]
The disk 27 stores operation level information and monitoring group information in addition to the operation history database. When performing the Write processing 25b, the data access processing means 25 reads the operation level information from the disk 27 by the reading means 29, compares the operation level information with the operation level of the currently logged-in user, and is the level at which the write processing can be performed. Only when the write process 25b is performed. When performing the above-described tag search, the data search processing means 22 reads the alarm monitoring group information from the disk 27 by the reading means 29, and executes only the tag search processing in the set alarm monitoring group.
FIG. 3 is a block diagram showing a function of monitoring and controlling plant data by the mobile terminal 11 and a function of the human interface 15 for processing a request from the mobile terminal 11. In the human interface 15, the screen display processing unit 21 shown in FIG. 2 has a functional configuration in which only the mobile terminal request processing unit 31 is replaced. That is, the data search processing unit 22 and the data access processing unit 23 receive and execute the same processing as the request from the screen display processing unit 21 in FIG.
On the mobile terminal 11 side, when a plant data (tag) search processing request 35 is input by the screen display processing means 34 on the mobile terminal 11, the request is transmitted to the human interface 15 through the network processing unit 36.
In the human interface 15, this request is received by the network processing means 33 and transmitted to the mobile terminal processing means 31. Then, in accordance with an instruction from the mobile terminal processing device 31, the data search processing means 22 is operated and executed. The search result is returned to the mobile terminal 11 along the route opposite to that described above, and the search result is displayed on the mobile terminal 11 by the screen display processing unit 34 in a list.
Similarly, when a tag data read / display request 37a or a tag data write request 37b is input by the screen display processing unit 34 of the mobile terminal 11, those requests are transmitted to the human interface 15 through the network processing unit 36. .
In the human interface 15, this request is received by the network processing means 33 and transmitted to the mobile terminal processing means 31. Then, in accordance with an instruction from the mobile terminal processing device 31, the data access processing unit 25 is caused to execute a read process 25a or a write process 25b. These processing results are returned to the mobile terminal 11 by taking the reverse route, and the processing results are displayed on the mobile terminal 11 by the screen display processing means 34. That is, the display and writing processing of the tag data on the mobile terminal 11 is completed.
To summarize the functions of the network processing unit 36 of the mobile terminal 11, when a list request (search processing request) of plant data (tag) and a request to read or write desired data are input from the screen display processing unit 34, Is transmitted to the human interface 15. Then, when those processing results are transmitted from the human interface 15, the processing results are output to the screen display processing means 34.
In addition, the functions of the mobile terminal request processing means 31 of the human interface 15 are summarized. When the mobile terminal 11 receives a plant data list request, the data search processing means 22 is operated and the search result is transmitted to the mobile terminal 11. . When there is a request to read or write desired data from the mobile terminal 11, the mobile terminal 11 causes the data access processing unit 25 to execute the request and transmits the processing result to the mobile terminal 11.
[0025]
Here, even when the write process 25b of the human interface 15 is operated in response to a request from the mobile terminal 11 and data is written to the tag, it is necessary to save the history. For this reason, the operation history (data writing has been performed) is stored in the operation history database in the disk 27 by the operation history storage unit 26.
[0026]
Also, in the case where the write processing 25b is performed in response to a request from the mobile terminal 11, the operation level information is read from the disk 27 by the reading means 29, and is compared with the operation level of the user logged in from the mobile terminal 11. Then, the Write process 25b is executed only when the operation level of the user is a level at which the write process can be performed. Similarly, when a tag search is performed by the data search processing unit 22 in response to a request from the mobile terminal 11, the alarm monitoring group information specified by the mobile terminal 11 is read from the disk 27 by the reading unit 29, and the specified alarm monitoring group is read. Implement tag search processing within.
In the above configuration, as shown in FIG. 1, the mobile terminal 11 is connected to the plant monitoring and control device 13 system by wireless (wireless LAN). That is, data transmission and reception are performed with the plant monitoring and control device 13 using the wireless LAN, and a list display and data setting of the tag data on the mobile terminal 11 are enabled.
The mobile terminal 11 can be positioned as a human interface 15 having a small display area. Therefore, the mobile terminal 11 using the wireless LAN communicates with the human interface 15 of the plant monitoring and control device 13 to display and operate data.
The plant monitoring and control device 13 includes a controller 14 for collecting and controlling data of the plant 12 and a human interface 15 for managing the data of the controller 14 so as to be displayed. The data of the plant 12 is managed by collecting meaningful data as tags. For example, in the case of a water supply plant, data such as an upper limit value, a lower limit value, and a measured water level of a pond water level are managed in tag units with IDs.
The human interface 15 performs data display and data setting in tag units. Further, the human interface 15 can search and display all tags in the system by the data search processing means 22. For this reason, when searching and displaying a list on the mobile terminal 11, a tag search request from the mobile terminal 11 is notified to the human interface 15 through the wireless LAN, and the data search processing means 22 of the human interface 15 is operated. Good.
When receiving the tag search request, the data search processing unit 22 performs a tag search process and extracts all tags in the system. This search result is notified to the mobile terminal 11 through the wireless LAN. The mobile terminal 11 obtains a tag search result and displays a list of tag names (list display).
The mobile terminal 11 selects a desired tag to be displayed from the tag name list. A request to acquire (read) the data value of the selected tag is sent to the human interface 15 again. The human interface 15 acquires (reads) the data of the notified tag from the controller 14 and returns the data to the mobile terminal 11. The mobile terminal 11 displays the tag data obtained from the human interface 15 and monitors the tags.
When setting desired tag data from the mobile terminal 11, data writing to the tag is similarly performed via the human interface 15.
In general, when the plant becomes large-scale, the number of objects to be monitored increases and the selection thereof becomes difficult. Therefore, a target to be monitored can be selected in the human interface 15. In other words, the monitoring group number to which the tag belongs is set in the tag information, the monitoring group number of the tag monitored by the human interface 15 is specified, and only the tag having the target monitoring group number is monitored. In the tag search function, only tags belonging to the monitoring group number specified by the human interface 15 are searched.
Also in the tag search request executed from the mobile terminal 11, the mobile terminal 11 specifies the alarm monitoring group number. By specifying the alarm monitoring group number, tag search in the group is performed by the human interface 15, and the result is returned to the mobile terminal 11, so that tags can be narrowed down on the mobile terminal 11.
In monitoring and controlling a plant, an operation level may be set for security (operation of writing data) to a tag. In this case, in the present system, this operation level is set in the human interface 15. The operation level is set at a plurality of levels, and data writing to the tag is restricted depending on the level.
This operation level is set for each login user of the human interface 15. For example, when the user A is logged in, the change of only the tag setting value is permitted, and when the user B is logged in, the change of the tag setting value and the parameter are also permitted.
When writing to a tag from the mobile terminal 11, one user of the human interface 15 is assigned as a user of the mobile terminal 11. By the user assignment to the mobile terminal 11, the operation level from the mobile terminal 11 can be set.
Further, when an operation (data writing) is performed on a tag, the human interface 15 records the operation history in an operation history database provided in the disk 27 of the human interface 15. That is, the fact that the operation on the tag is performed is recorded together with the name of the human interface that performed the operation and the login user name.
The contents of the operation history database can be displayed on the human interface 15, and it is possible to confirm when and where the user of the human interface performed the setting operation.
At the time of writing operation to the tag from the mobile terminal 11, when the writing process is performed from the mobile terminal 11 by allocating the mobile terminal 11 as one user as described above, the history is recorded in the operation history database. Therefore, the execution of the tag operation from the mobile terminal 11 is recorded, and the recording of the data setting operation can be confirmed later.
The mobile terminal 11 performs tag data display and setting operations while communicating with the human interface 15 using the wireless LAN. Since it is wireless, the communication state is greatly affected by the position of the mobile terminal 11 and the like, and it is necessary for the operator of the mobile terminal 11 to determine the certainty of the displayed data.
Here, when displaying the tag data, the data is periodically acquired from the human interface 15 and the display is updated. Therefore, every time the mobile terminal 11 issues a data acquisition request to the human interface 15, a part of the color on the screen is changed. As a result, when the communication is performed correctly, the color of a part of the screen periodically changes. Therefore, the operator of the mobile terminal 11 can determine whether the communication state is normal based on the color change. it can.
FIG. 4 is a flowchart showing whether the communication state is correctly performed at the time of data refresh in the mobile terminal. The right side in the figure shows the display state of the tag data display section 41.
In the flowchart of FIG. 4, a data refresh process is started (401), a request for acquisition of tag data is made, access to the tag data is performed by the human interface 15 via the wireless LAN, and as a result, Clean data is received (402).
When the normal data is received, the color of the communication status area 41a of the tag data display section 41 is changed (403) and the tag data is changed (404). That is, when the data is correctly acquired, the data (bar graph, numerical display, etc.) of the tag data display unit 41 on the mobile terminal 11 is updated as shown in FIG. carry out. The mobile terminal user can determine that the communication is performed correctly if the area 41a is constantly changing colors.
Further, a plurality of human interfaces 15 may be provided depending on the system scale. In such a case, when a human interface (functioning as a gateway) which is a communication partner of the mobile terminal 11 stops, communication with another human interface is restarted. With such a configuration, the gateway function between the mobile terminal 11 and the monitoring control device 13 is duplicated.
FIG. 5 shows a process in which the mobile terminal 11 switches the human interface 15 that communicates a data access request (tag search, tag data read / write).
In the flowchart of FIG. 5, at the time of initialization (501), one human interface 15 is selected from the plant monitoring and control device 13 and set as a communication partner (502). (503) and (504). If the human interface fails and goes down, no response is returned from the human interface 15 and data cannot be received correctly (505). At this time, another human interface 15 is selected from the plant monitoring and control device 13 and set as a new communication partner to continue the operation (506).
[0027]
As described above, by allowing the human interface 15 to accept and process the tag search operation, the data display, the data setting, and the setting of the operation level at the time of the data setting on the mobile terminal 11, the mobile terminal 11 causes the human interface 15 to perform the processing. The same management can be performed. Therefore, no special registration is required for the tag search operation, the data display, and the data setting on the mobile terminal 11, and it is possible to follow a change process such as addition and deletion of a tag performed by the plant monitoring control device. And improve engineering efficiency. Further, since the request from the mobile terminal 11 is processed by the human interface 15, there is no need to install a special gateway for the mobile terminal 11, and the cost can be reduced.
[0028]
【The invention's effect】
According to the present invention, it is possible to obtain a plant monitoring and control system in which data mismatch does not occur between the plant monitoring and control device side and the mobile terminal side. Further, an operation on data on the mobile terminal side can be stored in the operation history database. In addition, the reliability of the wireless communication state can be displayed, and backup at the time of gateway down is also possible.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing one embodiment of a plant monitoring and control system of the present invention.
FIG. 2 is a functional block diagram illustrating functions of a human interface in the embodiment.
FIG. 3 is a functional block diagram illustrating a relationship between a human interface and a mobile terminal according to the first embodiment;
FIG. 4 is a flowchart illustrating a procedure for displaying a communication state according to the first embodiment;
FIG. 5 is a flowchart illustrating a human interface switching procedure in the first embodiment.
[Explanation of symbols]
11 Mobile terminals
12 plants
13 Plant monitoring and control equipment
14 Controller
15 Human Interface
16 wireless base stations
22 Data search processing means
25 Data access processing means
31 Mobile terminal request processing means
34 screen display processing means
36 Network processing means

Claims (7)

A method of monitoring and controlling a plant with a controller that collects various data of a plant, a human interface that manages data held by the controller so that the data can be displayed, and a mobile terminal that exchanges data with the human interface and wirelessly,
When a mobile terminal makes a plant data list request, it operates the human interface data search means via wireless, sends the data search result to the mobile terminal wirelessly, and the mobile terminal uses a common data list with the human interface. And
When a request to read or write desired data is made at the mobile terminal, the data access processing means of the human interface is wirelessly operated, and processing results for these requests are wirelessly transmitted to the mobile terminal and displayed on the mobile terminal. A plant monitoring control method characterized by the above-mentioned. A plant monitoring and control system including a controller that collects various data of a plant, a human interface that manages data held by the controller so that the data can be displayed, and a mobile terminal that performs data transmission and reception by wireless with the human interface.
The mobile terminal,
Screen display processing means capable of inputting a list request of the plant data, a read request and a write request of desired data,
When a plant data list request, desired data read request or write request is input from this screen display processing means, these requests are transmitted to the human interface, and when the processing results are transmitted from the human interface, Network processing means for outputting the processing result to the screen display processing means,
The human interface,
Data search processing means for searching for data held by the controller,
Data access means for reading or writing desired data;
When there is a plant data list request from the mobile terminal, operate the data search processing means, transmit the search result to the mobile terminal, and, when there is a read request or write request for the desired data from the mobile terminal, A mobile terminal request processing unit for causing the data access processing unit to execute these requests and transmitting the processing results to a mobile terminal. The plant data is divided into a plurality of monitoring groups, and the mobile terminal is configured to specify an arbitrary monitoring group and to request a list of data allocated to the monitoring group. The plant monitoring and control system according to claim 2, wherein: In the mobile terminal, an operation level for plant data can be specified, and the permitted operation is assigned in advance to the operation level, and only the operation corresponding to the specified operation level is permitted to the data access processing means. The plant monitoring and control system according to claim 2, wherein the system is configured as follows. The plant monitoring and control system according to claim 2, further comprising an operation history database that records an operation history when an operation is performed on plant data from the mobile terminal. 3. The plant monitoring and control system according to claim 2, wherein the mobile terminal is provided with display means for displaying communication quality when data is exchanged with the human interface by wireless. 3. The plant monitoring system according to claim 2, wherein a plurality of human interfaces functioning as a gateway for the mobile terminal are provided, and the mobile terminal can be selectively connected to the plurality of human interfaces wirelessly, so that backup at the time of the gateway down is enabled. Control system.

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