JP2013054626A - Plant data display device, plant data display method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an acquisition of information of an event occurring in a plant by efficiently retrieving many parameters collected from monitoring objects of the plant.SOLUTION: A trend data retrieval part 12 reads, from a plant table, data representing values of parameters for use in processing of monitoring objects of a plant, and data representing values of related other parameters included in a same system as the parameters in which an event occurrence is detected, as trend data representing a trend in a change in values with time course within a predetermined period. When an event same as the event has occurred in the past, the trend data retrieval part reads the information of the event having occurred in the past for every parameter and displays the trend data on a display part.

Description

  The present invention relates to, for example, a plant data display device, a plant data display method, and a program for displaying data output by a plant when monitoring or controlling the operation of an industrial plant (hereinafter referred to as “plant”).

  Conventionally, when operating a plant such as a nuclear power plant or a thermal power plant, the plant data display device collects data indicating parameter values used in processing of the equipment to be monitored by the plant, and the liquid crystal display or the like. An operation for displaying data or the like on a configured display unit has been performed. The plant data display device is configured by a computer such as a computer. When data or the like is displayed on the display unit of the plant data display device, an operator can obtain necessary information. Parameters provided to the plant data display device are represented by analog data representing the pressure and temperature of the plant, digital data representing the occurrence of events such as starting or stopping of the pumps provided in the plant, opening and closing of valves, etc. It was. In the following description, analog data or digital data is abbreviated as “data”.

  This plant data display device can grasp which parameter the received data indicates by analyzing a predetermined signal pattern included in the received data. The plant data display device detects changes in various types of parameters from the collected data in order to monitor information indicating the state of the plant (hereinafter referred to as “event”). Here, the process of the plant is managed for each of a plurality of systems (for example, a water supply system and a control rod insertion system), and is used for a process in a plurality of monitoring targets (for example, piping valves, water supply pumps) for each system. A parameter was used.

  In addition, when the plant data display device detects that an event has occurred due to a change in digital data or an alarm from a monitoring target, the plant data display device recorded the event data including the time when the event occurred. . There are thousands of types of analog data and digital data, and each time an event occurs, a large amount of data is captured and data is provided to the operator in various ways.

  Patent Document 1 discloses a technique for displaying a process event occurrence history.

JP 2005-11169 A

  In recent years, with advances in computer technology, it has become possible to store a large amount of data captured in a short sample period for a long period of time. Conventionally, when an abnormality occurs in a plant, there are several methods for investigating the cause of the abnormality. For example, check the same type of abnormality that occurred in the past, check how the related parameters behaved in the same system, how the operator responded to the time of occurrence of the abnormality, etc. There were methods to investigate, and these methods were effective for investigating the cause of the abnormality and considering countermeasures.

By the way, in order to extract appropriate parameters retroactively from thousands of parameters and display the trend using a time-series line graph, the operator had to take the following steps: .
(1) Investigate whether a similar abnormality has occurred in a large amount of event data recorded in the past.
(2) Examine the books for parameters of the same system related to the event where the abnormality occurred.
(3) Register the parameter as a trend display item.
(4) Designate and display the sections before and after the time when the abnormality occurs.
However, since the above procedure is performed manually by the operator, there is a possibility of erroneous input. In addition, when the number of procedures increases, the processing time required to display the trend may become long. For this reason, it takes extra effort and time to display the trend, it is difficult to detect in real time that an abnormality has occurred in the plant, and it takes time to take an appropriate response. It was.

  The present invention has been made in view of such a situation, and an object of the present invention is to efficiently search many parameters collected from a plant and to easily obtain information on events occurring in the plant.

The present invention collects data indicating the value of a parameter used in the process to be monitored by the plant at a predetermined cycle, and stores the data for each parameter in a plant table over a specific period.
Next, the data is analyzed to detect that the parameter has changed as an event occurrence, and information regarding the event including the event occurrence time is stored as event data in the event table for each parameter.
Next, the event data retrieved from the event table is displayed on a display unit that displays data for each parameter.
Next, when the process of the plant is managed for each of the plurality of systems and a plurality of parameters are related to each system, the data indicating the parameter values used in the process to be monitored by the plant and the occurrence of the event are detected. Data indicating the values of other related parameters that are included in the same system as the other parameters are read out from the plant table as trend data indicating the tendency of changes in values over time within a predetermined period.
When the same event as the event has occurred in the past, information on the event that occurred in the past is read for each parameter, and the trend data is displayed on the display unit as a trend.

  According to the present invention, when an event occurs in the plant, information related to the event that has occurred in the past is read for each parameter, and trend data is displayed on the display unit as a trend. For this reason, when the event that has occurred is abnormal, the operator can quickly determine whether there has been an event in which a similar abnormality has occurred in the past. As a result, it can be expected that the cause of the occurrence of an abnormality will be identified, and the response for taking measures against the abnormality will be greatly improved.

It is a block diagram which shows the example of an internal structure of the plant data display apparatus in one embodiment of this invention. It is explanatory drawing which shows the example of the event table in one embodiment of this invention. It is explanatory drawing which shows the example of the short-term plant table / long-term plant table in one embodiment of this invention. It is explanatory drawing which shows the example of the system | strain-input signal correspondence table in one embodiment of this invention. It is explanatory drawing which shows the example of the trend display selection table in one embodiment of this invention. It is explanatory drawing which shows the example of a transition of the screen which the operator in one embodiment of this invention operates.

  Hereinafter, an embodiment of the present invention (hereinafter referred to as “this example”) will be described with reference to the accompanying drawings. In the present embodiment, for example, an example in which the present invention is applied to a plant data display device 1 that monitors the operating state of a plant will be described. The plant data display device 1 is configured by a computer device such as a computer, and can execute a program to realize a plant data display method performed in cooperation with internal blocks.

  In a plant, a large number of control devices and detectors operate in association with each other, and these control devices and detectors are monitoring targets for an operator to monitor events. And since many data are output from many monitoring object, the relationship of the data obtained for every monitoring object tends to become unknown. For this reason, plant processing is managed for each of a plurality of systems, and a plurality of parameters are related to each system. For example, the parameters output by a plurality of monitoring targets related to the process of “water supply” of the plant are collectively managed in a unit called “system”. In this example, various signals output from the plant are applied as “parameters”. And the plant data display apparatus 1 provides an operator with required information, maintaining the relationship of data, by carrying out the trend display of the parameter put together for every system | strain.

[Configuration example of plant data display device]
FIG. 1 shows an internal configuration example of the plant data display device 1 of this example.
First, processing blocks of the plant data display device 1 will be described.
The plant data display device 1 includes a data collection unit 2 that collects data indicating parameter values used in processing to be monitored by a plant from a plant at a predetermined cycle. This data is composed of various types of input signals. The data collected by the data collection unit 2 includes, for example, analog data indicating the occurrence of a pressure or temperature measured by a plant monitoring target or an alarm, and digital data indicating the start or stop of a pump.

  In addition, the plant data display device 1 analyzes the data collected by the data collection unit 2 to detect that a parameter has changed as an event occurrence, and uses information about the event including the event occurrence time as event data for each parameter. Are provided with an event detection unit 3 for storing in the event table, and an event table 4 in which the detected event is written as event data together with the occurrence time. Further, the plant data display device 1 retrieves event data from the event table 4 and retrieves the event data retrieved from the event table 4 on the display unit 7, and the event data retrieval unit 5 retrieves the event data. An event data display unit 6 for displaying event data on the display unit 7 for each parameter is provided.

  The plant data display device 1 also includes a system-input signal correspondence table 9. The system-input signal correspondence table 9 is used as a correspondence table for managing a plurality of systems in plant processing in association with a plurality of parameters managed for each system.

  The plant data display device 1 includes a trend display selection data editing unit 10 that edits selection data in which a predetermined period is selected in order to perform trend display by an instruction input using the operation unit 8 performed by an operator, and a trend A trend display selection table 11 for storing trend display selection data edited by the display selection data editing unit 10 is provided. The trend display selection data editing unit 10 reads the parameters included in the selected system from the system-input signal correspondence table 9 and designates a predetermined period including the system, the parameters included in the system, and the event occurrence time. It is used as a selection data editing unit that passes selection data to the trend data search unit 12.

  The plant data display device 1 also displays a trend data search unit 12 that searches the selected trend display selection data from the trend display selection table 11, and a trend that displays the trend data searched by the trend data search unit 12 on the display unit 7. A data display unit 13 is provided. The trend display selection table 11 stores the extracted past event occurrence time, the time width set by default, and the extracted parameters as trend display information. The trend data search unit 12 includes data indicating the values of parameters used in the process to be monitored by the plant, and data indicating values of other related parameters included in the same system as the parameter in which the occurrence of the event is detected. Then, it is read out from the long-term plant table 17 as data indicating a tendency of a change in value with the passage of time within a predetermined period (hereinafter referred to as “trend data”). In addition, when the same event as the event that has occurred has occurred in the past, the trend data search unit 12 reads information on the event that has occurred in the past for each parameter, and displays the trend data on the display unit 7 as a trend display. It can also be made. The trend data search unit 12 can also display trend data on the display unit 7 based on the selection data received from the trend display selection data editing unit 10.

  The plant data display device 1 reads the data collected by the data collection unit 2 from the short-term data storage unit 14 that stores the data collected in the short-term plant table 15 and the short-term data output from the short-term data storage unit 14 or the short-term plant table 15. A long-term data storage unit 16 that stores the short-term data in the long-term plant table 17 is provided. In this example, the short-term data storage unit 14 and the long-term data storage unit 16 are used as data storage units that store data in the plant table for each parameter over a specific period. The long-term data stored in the long-term plant table 17 is read by the trend data search unit 12.

  Each table described above is configured in a large-capacity recording apparatus (not shown) (for example, a hard disk drive (HDD)). Each table has a plurality of different fields. For example, a relational database having “PID.NO” and “signal name” as keys as fields representing point IDs for individually identifying the positions of pipes in the plant is configured. The relation between tables, fields, etc. is managed by this relational database. Since a lot of data is stored in the long-term plant table 17, not only the HDD but also a recording device such as a magnetic tape or an optical disk may be used. The display unit 7 may be a liquid crystal display device, an organic EL (Electro-Luminescence) display device, or the like, and the operation unit 8 may be a mouse, a keyboard, or the like. In addition, the display unit 7 and the operation unit 8 may be configured as a touch panel display capable of performing video display and operation input on a single screen, or may be capable of operation input using a stylus pen.

[Operation example of plant data display device]
Next, an operation example of the plant data display device 1 will be described.
There are several causes of abnormalities that occur in the plant. Before the abnormality occurs in the plant, equipment such as pumps and valves included in the plant malfunctions, or certain parameters exceed the alarm set value. It is known that Accordingly, the plant data display device 1 is effective to perform the following processing in order to detect an abnormality that has occurred in the past in the past, rather than when an abnormality is measured due to the occurrence of an event.
(1) Event data similar to the event data of the currently occurring event is extracted from the event data accumulated in the past.
(2) The behavior of the parameter related to the event that occurred in the vicinity of the time when the extracted past event occurred is investigated.
(3) The occurrence of an event is grasped by verifying the value obtained by analyzing the data continuously output by the plant.
With these processes, the plant data display device 1 can recognize that some state change has occurred in the plant near the time when the parameter has changed, and can notify the operator of the occurrence of an abnormality.

  Therefore, the data collection unit 2 collects data output from the plant (including measurement values, alarms, parameters, etc.) in real time, and outputs the collected data to the event detection unit 3 and the short-term data storage unit 14. .

  Next, the event detection unit 3 analyzes the data received from the data collection unit 2 and detects whether an event has occurred in the plant. When detecting that an event has occurred, the event detection unit 3 writes the detected event and the time at which the event occurred in the event table 4. The event table 4 performs log management of the input signal, occurrence time, and data at the event occurrence time, and stores information on the cause and countermeasure for each event.

  The event data search unit 5 can quickly search the event table 4 for event data at a specific date and time and when a specific event occurs. Moreover, the event data search part 5 can also display the information regarding a cause and countermeasures together with event data as information regarding a specific event. The search process performed by the event data search unit 5 is executed based on an input instruction made by the operator who confirms the event data displayed on the display unit 7 via the operation unit 8. May be done automatically according to Then, the event data search unit 5 displays the event data searched from the event table 4 on the display unit 7 via the event data display unit 6 or the latest event data display result (see FIG. 6A described later) or the same event data display result. (See FIG. 6B described later). As described above, the event data display unit 6 is used as an interface having a function of creating a screen for displaying the event data searched by the event data search unit 5 on the display unit 7.

  When the operator operates the operation unit 8 and gives an instruction to select one event data from the event data displayed on the display unit 7, this instruction is sent to the event data display unit 6. The event data search unit 5 searches the event data instructed from the event table 4 again and causes the display unit 7 to display the event data. For this reason, the event data of the event related to the abnormality currently occurring in the plant is displayed on the display unit 7, and the operator can search for the occurrence status of the event that occurred in the past.

  The short-term data storage unit 14 stores the data received from the data collection unit 2 in the short-term plant table 15. The short-term plant table 15 includes an event occurrence time, a PID. Data including NO, a signal name indicating the type of the input signal, a status value to be monitored, and the like is stored for several hours. Since the capacity that the short-term data storage unit 14 can store data is limited, the old data is overwritten with the latest data.

  When the capacity of the short-term plant table 15 exceeds a specified value, the short-term data storage unit 14 gives an instruction to transfer the data stored in the short-term plant table 15 from the short-term data storage unit 14 to the long-term plant table 17. To do. Upon receiving this instruction, the long-term data storage unit 16 reads data from the short-term plant table 15 and stores it in the long-term plant table 17. The capacity of the long-term plant table 17 is larger than the capacity of the short-term plant table 15, and data can be stored for several days. Further, since the table configuration of the long-term plant table 17 is the same as the table configuration of the short-term plant table 15, the long-term data storage unit 16 does not need to perform processing such as conversion when transferring data.

  The system-input signal correspondence table 9 manages the correspondence of input signals in each system. The trend display selection data editing unit 10 edits trend data to be displayed on the trend display screen in accordance with an instruction from the operation unit 8 based on the operation of the operator. At this time, the display period in which the data of the signal input from the monitoring target is displayed as a trend on the display unit 7 as a line graph for a predetermined period is edited.

  The trend display selection table 11 stores the display period edited by the trend display selection data editing unit 10 and information related to the monitoring target. Here, since the parameters related to the event are related to other parameters of the same system as the event, the trend data search unit 12 extracts the parameters of the same system from the long-term plant table 17. At this time, the trend data search unit 12 reads the display period from the trend display selection table 11, searches the long-term plant table 17 for data to be monitored within this display period, and outputs the search result to the trend data display unit 13. To do.

  The trend data display unit 13 stores a graph format and the like for forming trend data display results (see FIG. 6C described later) in various states. Then, the trend data search unit 12 displays the trend data display result on the display unit 7 via the trend data display unit 13. In the trend data display result, the parameters at the time when the same event has occurred in the past are displayed as a trend on the vertical axis as a quantity and on the horizontal axis as a date and time. By displaying the trend data display result in this way, information for determining whether or not a state identical to the abnormal state of the currently occurring plant has occurred in the past is quickly provided to the operator. For this reason, a parameter of the same system as the event related to the abnormal state is automatically selected. Then, the display unit 7 outputs data for drawing the trend display to the trend data display unit 13.

[Table configuration example]
Next, a configuration example of each table will be described with reference to FIGS. Here, as an item common to each figure, the description will be made by paying attention to a monitoring target in which “BA005” is assigned as “PID.NO” and “B21” is assigned as “system”.

FIG. 2 shows a configuration example of the event table 4.
The event table 4 indicates that an event has occurred: “occurrence time” when the event occurred in the monitoring target, “PID.NO”, “signal name” of the input signal, and “status value” indicating the status of the monitoring target at the event occurrence time. Save each time. In this example, every time an event occurs, the latest event record is stored in the event table 4 in descending order of “occurrence time” so that it becomes the first record. Therefore, “BA005” in “PID.NO” indicates that an event called an alarm has occurred in “2011/02/24 12:59:13” for “feed water flow rate A”.

FIG. 3 shows a configuration example of the short-term plant table 15 and the long-term plant table 17.
Both the short-term plant table 15 and the long-term plant table 17 have the same field configuration as the event table 4. As described above, the data stored in the short-term plant table 15 is moved to the long-term plant table 17 after a certain period of time and stored for a long time.

  The short-term plant table 15 or the long-term plant table 17 stores data collected in real time as “current time” and stores data collected one second ago as “current time−1 second”. The time until which data is stored in the short-term plant table 15 or the long-term plant table 17 varies depending on the amount of records and the number of parameters at each time. Further, in this example, data is stored every second, but the collection timing may be longer or shorter than one second. In this example, the short-term plant table 15 or the long-term plant table 17 indicates that the data “BA005” in “PID.NO” is stored every second. If a sufficient capacity can be secured, the short-term plant table 15 and the long-term plant table 17 are one plant table, and the short-term data storage unit 14 and the long-term data storage unit 16 are one data storage unit. 1 may be configured.

FIG. 4 shows a configuration example of the system-input signal correspondence table 9.
In the system-input signal correspondence table 9, in addition to “PID.NO” and “signal name”, a field is configured by “system NO” assigned to identify the system. Of the plurality of records displayed in the system-input signal correspondence table 9 of this example, the upper two records include the PIDs in the short-term plant table 15 and the long-term plant table 17. The monitoring target indicated by NO is associated with the system NO of each monitoring target. Therefore, it can be seen that a plurality of types of PIDs, NOs, and signal names correspond to one type of system NO. Here, the feed water temperature, feed water flow rate, and feed water discharge pressure shown in “Signal Name” all represent parameters related to the event in which an abnormality has occurred, and “System No.” is both “B21”. In this example, in the second record of the system-input signal correspondence table 9, information “water supply flow rate A” of “BA005” in “PID.NO” is stored corresponding to “system NO” “B21”. Is shown.

FIG. 5 shows a configuration example of the trend display selection table 11.
The trend display selection table 11 is a table that is referred to when a trend of data in a predetermined period is displayed as a trend. The trend display selection table 11 includes fields including “display period” for trend display of data in addition to “PID.NO” and “signal name”. In this example, the display period is the same for all three records, and the display period can be arbitrarily changed. In this example, the “feed water flow rate A” of “BA005” in “PID.NO” is “2009/02/13 13:56:00 to 2009/02/0213 15:56” in the system-input signal correspondence table 9. The data is read from the long-term plant table 17 over a display period of “0:00”.

[Screen transition example]
FIG. 6 shows a transition example of a screen on which an operator monitors an event.
FIG. 6A shows an example of the display result of the latest event data.
The display unit 7 updates and displays event data each time the event detection unit 3 detects an event. At this time, the event data search unit 5 searches the event table 4 for past event data including the same event as the event specified by the selected event data, and displays the display unit 7 via the event data display unit 6. List event data. At this time, the event data display unit 6 forms a screen for displaying the event data on the display unit 7 in descending order from the latest record. In this example, a list of information related to the events shown in the event table 4 is displayed. When the operator selects event data by moving the cursor to the event data being displayed, the screen changes to the same event data display result shown in FIG. 6B.

FIG. 6B shows an example of a display result of the same event data.
When an event occurs, it is necessary to know at which point in time the same event occurred. The event data display unit 6 searches for the same event from the event table 4 via the event data search unit 5 and displays it on the display unit 7 together with the event occurrence time. In this example, when “BA005” in “PID.NO” is selected from the display result of the latest event data shown in FIG. 6A, the same “PID.NO” is “BA005” and the same event. A list of event data for which "alarms" occurred is displayed.

FIG. 6C shows an example of a display result of trend data related to the selected event.
The trend data associated with “PID.NO” and “signal name” selected in the trend display selection table 11 (see FIG. 5) is displayed on the display unit 7 in the same display period. In this example, the feed water temperature, feed water flow rate, feed water discharge pressure of the plant in 1 hour before and after 14:56 on February 13, 2009, corresponding to the third record of the display result of the same event data shown in FIG. 6B Is displayed as a trend in a line graph over time. The trend data search unit 12 automatically determines the time at which the event occurred and the parameter display period for the line graph displayed on the display unit 7 as a trend, and outputs the trend display data to the trend data display unit 13. .

  According to the plant data display device 1 according to the present embodiment described above, an event in which a monitoring target has occurred is automatically detected, stored in the event table 4, and the latest event is displayed on the display unit 7. Can do. For this reason, the operator can confirm the occurrence of an event by confirming the display result of the latest event data updated in real time. By selecting an event record displayed in the display result of the latest event data, it is possible to display a list of events of the same type that have occurred in the past, together with their occurrence times. Therefore, the operator can easily grasp the event occurrence frequency and the time corresponding to the event.

  The data collected by the data collection unit 2 is stored in the short-term plant table 15 and then stored in the long-term plant table 17 for a long time. And the trend data search part 12 extracts the transition of the data in a predetermined period as trend data based on the data which a plant outputs, and processes this trend data in the form suitable for a trend display. Then, the transition of the value in the vicinity of the occurrence time of the event that occurred in the past can be displayed as a trend on the display unit 7. For this reason, the operator can predict a change in the state of the event that has occurred, and can take appropriate measures.

  Further, in the trend data display result, the transition of values at the event occurrence time of related parameters included in the same system of the generated event can be displayed on the display unit 7 at the same time. For this reason, the operator can grasp not only the specific parameters but also the fluctuations in the values of the related parameters with the passage of time, and it is easy to specify the cause of the event.

[Modification]
The display period can be arbitrarily changed, and when the operator confirms a detailed change in the trend, the display period may be shortened. In addition, the scale of the vertical axis can be arbitrarily changed, and even in a different unit system, visibility can be improved by changing the color or line type of the broken line. At this time, the trend data search unit 12 searches the event table 4 for past event data read from the long-term plant table 17, and causes the display unit 7 to display a trend on the same time width in the past. May be.

  The series of processes in the above-described embodiment can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, it can be executed by a computer in which a program constituting the software is incorporated in dedicated hardware or a computer in which programs for executing various functions are installed. is there. For example, what is necessary is just to install and run the program which comprises desired software in a general purpose personal computer.

  Further, a recording medium on which a program code of software that realizes the functions of the above-described embodiments may be supplied to the system or apparatus. It goes without saying that the function is also realized by a computer (or a control device such as a CPU) of the system or apparatus reading and executing the program code stored in the recording medium.

  As a recording medium for supplying the program code in this case, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like is used. Can do.

  Further, the functions of the above-described embodiment are realized by executing the program code read by the computer. In addition, based on the instruction of the program code, the OS running on the computer performs part or all of the actual processing. The case where the functions of the above-described embodiment are realized by the processing is also included.

  Further, the present invention is not limited to the above-described embodiments, and it is needless to say that other various application examples and modifications can be taken without departing from the gist of the present invention described in the claims.

  DESCRIPTION OF SYMBOLS 1 ... Plant data display apparatus, 2 ... Data collection part, 3 ... Event detection part, 4 ... Event table, 5 ... Event data search part, 6 ... Event data display part, 7 ... Display part, 8 ... Operation part, 9 ... System-input signal correspondence table, 10 ... Trend display selection data editing section, 11 ... Trend display selection table, 12 ... Trend data search section, 13 ... Trend data display section, 14 ... Short-term data storage section, 15 ... Short-term plant table, 16 ... Long-term data storage unit, 17 ... Long-term plant table

Claims (8)

A data collection unit that collects data indicating the value of a parameter used in processing of a monitoring target of the plant from the plant at a predetermined period;
A display unit for displaying the data for each parameter;
A data storage unit for storing the data in the plant table for each parameter over a specific period;
Analyzing the data, detecting that the parameter has changed as an occurrence of an event, and an event detection unit that stores information about the event including the occurrence time of the event in the event table for each parameter as event data;
An event data search unit for displaying the event data searched from the event table on the display unit;
When the processing of the plant is managed for each of a plurality of systems and a plurality of the parameters are related to each of the systems, the data indicating the value of the parameter used in the processing of the monitoring target of the plant, and the occurrence of the event The data that is included in the same system as the detected parameter and that indicates the value of the other related parameter is read from the plant table as trend data that indicates the tendency of the value to change over time within a predetermined period, When the same event as the event has occurred in the past, a trend data search unit that reads information on the event that has occurred in the past for each parameter and displays the trend data on the display unit as a trend is provided. Plant data display device. Further, the plurality of systems in the processing of the plant, a correspondence table that manages the plurality of parameters managed for each system in association with each other,
Reading the parameters included in the selected system from the correspondence table, and selecting the trend data search unit for selection data specifying a predetermined period including the system, the parameters included in the system, and the occurrence time of the event A selection data editing section to be passed to
The plant data display device according to claim 1, wherein the trend data search unit displays the trend data on the display unit based on the selection data received from the selection data editing unit. The display unit updates and displays the event data each time the event detection unit detects the event,
The plant data according to claim 2, wherein the event data search unit searches the event table for past event data including the same event as the event specified by the selected event data, and displays the list on the display unit. Display device. In the event table, information on the cause and countermeasure for each event is stored,
The plant data display device according to claim 3, wherein the event data search unit displays information on the cause and countermeasures together with the event data as information on the specific event. 5. The plant according to claim 4, wherein the trend data search unit searches the event table for past event data read from the plant table, and causes a plurality of past identical events to be trend-displayed on the display unit with the same time width. Data display device. The data collected by the data collection unit includes analog data indicating the occurrence of a pressure or temperature or an alarm measured by the monitoring target of the plant, and digital data indicating start or stop of a pump. Plant data display device. Collecting data indicating the values of parameters used in the process of monitoring the plant from the plant at a predetermined cycle;
Storing the data in the plant table for each parameter over a specific period of time;
Analyzing the data, detecting that the parameter has changed as an event occurrence, and storing the event-related information including the event occurrence time as event data in the event table for each parameter;
Displaying the event data retrieved from the event table on a display unit that displays the data for each parameter;
When the processing of the plant is managed for each of a plurality of systems and a plurality of the parameters are related to each of the systems, the data indicating the value of the parameter used in the processing of the monitoring target of the plant, and the occurrence of the event The data that is included in the same system as the detected parameter and that indicates the value of the other related parameter is read from the plant table as trend data that indicates the tendency of the value to change over time within a predetermined period, If the same event as the event has occurred in the past, information on the event that has occurred in the past is read for each parameter, and the trend data is displayed on the display unit as a trend. Method. A procedure for collecting data indicating the value of a parameter used in processing of a monitoring target of a plant from the plant at a predetermined period;
Storing the data in the plant table for each parameter over a specific period of time;
Analyzing the data, detecting that the parameter has changed as an occurrence of an event, and storing information on the event including the occurrence time of the event as event data in the event table for each parameter;
Displaying the event data retrieved from the event table on a display unit that displays the data for each parameter;
When the processing of the plant is managed for each of a plurality of systems and a plurality of the parameters are related to each of the systems, the data indicating the value of the parameter used in the processing of the monitoring target of the plant, and the occurrence of the event The data that is included in the same system as the detected parameter and that indicates the value of the other related parameter is read from the plant table as trend data that indicates the tendency of the value to change over time within a predetermined period, If the same event as the event has occurred in the past, the information related to the event that has occurred in the past is read for each parameter, and the procedure for causing the display to trend display the trend data is to be executed by the computer Program.

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