JP5250963B2 - Trend data storage and display methods in supervisory control systems - Google Patents

Description

  The present invention relates to a method for accumulating and displaying trend data such as measured value trend data and device state change messages in a monitoring control system.

  The supervisory control system is a computer system that monitors the current status and trends of monitoring control targets by collecting operating status data for plant equipment and power system equipment in the factory, as well as supervisory information processing and monitoring personnel. It has a control function by operation.

  Among these, as shown in FIG. 4, the monitoring control device 1 collects data on the monitoring target site at a constant cycle via a data transmission path, such as measured value trend data and device state change message. While accumulating in the memory | storage device 2, it displays and outputs as trend data containing a graph, a figure, and character information on the desktop display apparatus 3, a screen panel, etc. FIG.

As shown in FIG. 5, the measurement value trend data is accumulated and displayed by collecting a fixed number of samples periodically by the collecting program 11 and accumulating the accumulated data as an accumulation file 12. Displayed on the display 14. In addition, as shown in FIG. 6, the device state change data is stored and displayed as a storage file 32 by collecting a fixed number of operation / failure histories of plant facilities and power system devices using the collection program 31 , The stored data is displayed on the display 34 by the display program 33 .

As a method for accumulating collected data, a method has been proposed in which data is processed by adding a tag or a preset arithmetic equation (see, for example, Patent Document 1).
JP-A-8-249055

  In FIG. 4, as the performance of the CPU constituting the monitoring control device 1 increases and the capacity of the storage device increases, an increase in the number of data points to be collected and a longer accumulation period are required. Since the trend data is composed of a single file (hereinafter referred to as a trend bank file), increasing the number of data points and the accumulation period increases the size of the trend bank file, resulting in the following problems.

  1) When the monitoring and control device has a duplex configuration, it is necessary to keep the data of both devices equal (hereinafter referred to as data equivalence). The time required for data equivalence is proportional to the amount of equivalent data. If the size of the trend bank file is small, the entire trend bank file can be equivalent all at once, but if the size is large, the time required for the equivalence processing becomes enormous.

  2) As a countermeasure for the above 1), when only a necessary part in the trend bank file is to be equivalent, the process of calculating the equivalent target part from the huge trend bank file becomes very complicated.

  As shown in FIGS. 5 and 6, in the conventional data storage / display method in the conventional monitoring and control system, a fixed number of operations / fault history recording / display, and a fixed sample number of measured value trend data are recorded. / Because of the display, there is a problem that it is difficult to cope with the required recording capacity that is different for each monitoring plant.

  In the conventional monitoring and control system, priority is given to grasping the current state of the monitoring target and ensuring the control response display performance, and the history recording process is simplified as much as possible (cyclic recording to a single file). Etc.), the recording / display performance has been ensured. However, there has been a problem that it is not possible to cope with analysis of a monitoring target based on a large amount of history recording or failure diagnosis.

  An object of the present invention is to provide a trend data accumulation / display method for a monitoring control system that solves the above-described problems.

  In order to solve the above-described problems, the present invention collects trend bank data, which has been managed in a conventional single data file, in trend data such as trend data of monitoring and control systems and trend data such as device status change messages on a daily basis. Accumulate as divided trend bank data, associate trend bang data divided by index data with date, and take out as data file corresponding to date that needs equivalence for data equivalence and perform equivalence As a result, even if the number of collected data points and the accumulation period are lengthened, the data equivalence processing is speeded up and data access is facilitated.

  In addition, the present invention makes it possible to set a recording capacity adapted to each monitoring control system by using the data storage / display capacity as a setting parameter at the time of system startup. Further, a plurality of accumulated files are created in a fixed time unit, and the files for the time corresponding to the number of samples that can be displayed at the same time are reduced, thereby reducing the readout overhead at the time of display. Furthermore, the user is prompted to save to an external storage medium before deleting / overwriting past data.

  From the above, the present invention is characterized by the following method.

(1) A method for storing and displaying the trend data consisting of measured value trend data and device status change message in the monitoring control system,
Means for storing data in a data storage file and changing the recording capacity for each monitoring control system using the capacity of the data display as a setting parameter at system startup;
Oite the data storage to the data storage file, wherein creating multiple data storage file in a predetermined time unit, and means for the time duration of the file corresponding to the number of samples that can be displayed simultaneously,
Characterized in that a arouse means saving to the external storage medium to the user before deleting, overwriting the previous data with respect to the data storage file.

  As described above, according to the present invention, the trend data of the monitoring control system and the trend data collection such as the device state change message are accumulated as trend bank data divided in units of days, and the trend bang data divided by the index data and Since the date is associated and the data equivalence is extracted as a data file corresponding to the date that requires equivalence, and the equivalence is performed, only the trend bang data that corresponds to the date that requires data equivalence is considered as the equivalence target. Therefore, even if the number of trend data to be collected is increased and the accumulation period is lengthened, the time required for data equivalence can be reduced. Further, by providing index data in which the divided trend bang data and the date are associated with each other, data reference is facilitated. This is particularly effective when displaying data for a specific date from the saved trend data.

  Further, according to the present invention, since the data storage / display capacity is set as a setting parameter at the time of starting the system, it is possible to set a recording capacity suitable for each monitoring control system. Further, by creating a plurality of accumulated files in a fixed time unit and creating files for a time corresponding to the number of samples that can be displayed at the same time, the readout overhead during display can be reduced. Furthermore, it is possible to alert the user to save to an external storage medium before deleting / overwriting past data.

  FIG. 1 is a storage file configuration diagram showing Embodiment 1 of the present invention. As shown in the figure, trend bank data 21 managed by one data file is stored as trend bank data 23 as trend bank data 22 divided on a daily basis. In the case of data equivalence, data corresponding to a date requiring equivalence is extracted from the data file 23 and the equivalence is performed.

  By performing equivalence with such data accumulation, only trend bang data corresponding to the date that requires data equivalence is subject to equivalence, so even if the number of trend data to be collected is increased and the accumulation period is prolonged. Therefore, the time required for data equivalence can be reduced.

  Next, in the accumulation in which the trend bank data 22 is divided on a daily basis, as shown in the table below, an index data that associates the trend bank data on a daily basis with the date is provided.

  By dividing and accumulating trend bank data by generating such index data, the date can be used as a key when data is referenced / updated, and access is facilitated. This is particularly effective when displaying data for a specific date from the saved trend data. The trend data is not limited to the measured value trend data, but can be applied to accumulation / display of a device state change message or the like to obtain an equivalent effect.

  FIG. 2 is a block configuration diagram of a trend data accumulation / display system showing the second embodiment of the present invention. FIG. 5 differs from FIG. 5 in that the collection program 11 and the display program 13 in FIG. 5 have fixed capacity information by themselves and perform measurement data collection recording and display of a fixed number of samples. In this embodiment, the data storage / display capacity is set as a setting parameter at the time of system startup, so that the recording capacity is changed for each monitoring control system.

  For this reason, a capacity information definition file 16 is provided in which capacity information is defined for each measurement value item when the system is activated. During the trend data accumulation / display process, the collection program 11A and the display program 13A refer to the capacity definition information in the capacity definition information file 16 at the time of activation, and accumulate and display trend data based on this information.

  Furthermore, in FIG. 5, the storage file 12 stores data as a single file and overwrites the file when the capacity is exceeded. In this embodiment, a plurality of storage files can be created and displayed at the same time. By making the file for a time corresponding to a large number of samples, the readout overhead at the time of display is reduced.

  For this reason, a capacity monitoring program 17 is provided. When trend data is accumulated, the capacity monitoring program 17 refers to the capacity definition information in the capacity information definition file 16 at the time of activation, and based on this information and the free capacity of the accumulation file 12A. Monitor excess capacity and delete by file when capacity is exceeded. Furthermore, when the capacity is exceeded, data storage recommendation to an external medium is performed via the display 14 or the like.

  As described above, the storage / display capacity can be arbitrarily changed for each monitoring target system by setting the data storage / display capacity to be an operation parameter that can be set at the time of start-up. In addition, recording / display responses can be ensured by creating a plurality of recording files for the measured value trend data at regular time intervals. Furthermore, by setting the file for the time corresponding to the number of samples that can be displayed at one time, the readout overhead at the time of display can be reduced.

  FIG. 3 shows the case of operation / failure history accumulation / display, and the capacity information definition file 16 makes it possible to consider capacity specification based on the number of cases and capacity specification based on the number of days. Is daily. In order to secure the display response of the number of cases that can be displayed at one time, the file for the previous day is kept open in a state where the number of operations / failures is small, such as immediately after the day changes.

  Also in this case, the user is advised to save to the external recording medium and delete the past data by the free disk capacity of the monitoring control device and the history data storage capacity monitoring program 17.

The accumulation file block diagram which shows Embodiment 1 of this invention. The function block diagram of the trend data accumulation | storage / display system which shows Embodiment 2 of this invention. FIG. 6 is a functional configuration diagram of an operation / failure history accumulation / display method showing a second embodiment of the present invention. The functional block diagram of the conventional data storage and display system. The functional block diagram of the conventional trend data storage and display system. Functional configuration diagram of a conventional operation / failure history storage / display method.

Explanation of symbols

11, 31 , 11A Collection program 12, 32 , 12A Accumulated file 13, 33 , 13A Display program 14 Display 16 Capacity information definition file 17 Capacity monitoring program 21 Single trend bank data 22 Trend bank data divided every 22 days 23 days Trend bank data

Claims (1)

A method for storing and displaying the trend data consisting of measured value trend data and device status change message in the monitoring control system,
Means for storing data in a data storage file and changing the recording capacity for each monitoring control system using the capacity of the data display as a setting parameter at system startup;
Oite the data storage to the data storage file, wherein creating multiple data storage file in a predetermined time unit, and means for the time duration of the file corresponding to the number of samples that can be displayed simultaneously,
Wherein the data storage storage and display system of the trend data in a monitoring and control system is characterized in that a arouse means saving to the external storage medium to the user before deleting, overwriting the previous data for the file.

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