JPH07261744A - Method for displaying trend drawing - Google Patents

Abstract

PURPOSE:To compare different source data in one and the same trend drawing by means of a simple operation by storing source data in a buffer memory and displaying tracing by this data group within difference windows. CONSTITUTION:By means of tracing made of a collection of points indicating values corresponding to each on a time axis with an abscissa as the time axis, a plurality of windows for displaying a plurality of data groups as a trend drawing following a change with the passage of time are simultaneously displayed. A buffer memory is provided for temporarily storing the data groups displayed in the windows by means of tracing, and by selecting a trace displayed in the first window the first data group for displaying this trace is stored in this buffer memory. Then, by selecting a specified position within the second window, the trace using the first data group stored in the buffer memory is displayed from a specified position selected by using a coordinate system in the second window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trend diagram display method for displaying data that changes with time.

[0002]

2. Description of the Related Art Trend diagrams are often used in process control to show the result of the control state, and are means for monitoring data obtained by theoretical calculation such as real-time data and historical data or simulation. Becomes Then, for example, the comparison between the change in the month of this month, which is the real-time data, and the change of the month data of the last month, which is the historical data, and the comparison between these and the theoretical calculation data, detect the state of process control. It is the most important analytical method for practical use.

The process control device can display the above-mentioned trend diagram on its display portion, and the operator views the trend diagram to analyze the control state of the process. Here, the information obtained by changing the display state of the trend diagram changes. For this reason,
Normally, the trend diagram displayed by the process control device is
It has been decided. As a result, it is possible to analyze the data in the same state regardless of who displays the trend diagram without accidentally changing the display conditions.

FIG. 5 is a trend chart showing the monthly change in the data of the process to be controlled in the process control apparatus as described above. The process control device continues to collect data on the process to be controlled every day, but it is possible to aggregate the data on a monthly basis and display it as a trend chart as shown in FIG. In FIG. 5, 51 is a trend diagram display window for displaying a trend diagram, 52
Is a trace that displays the changes in the data for each day by connecting the data points on each day with a line. Then, this trend diagram uses the intra-month data group of April, which is the current month, as the source data.

Here, this trend diagram display window 5
In the display of No. 1, one trace is displayed, the source data of the trace to be displayed is the intra-month data group of the current month, and the like are set as initial setting conditions for display. On the other hand, unlike FIG. 5, as the past history, for example, a history trend chart showing a trend chart using the intra-month data group in December of last year can be displayed.

In the trend diagram display window in this case, one trace is displayed, the source data of the trace to be displayed is the intra-month data group of the month four months before the present, and the like. Is set as. Similarly, the trend is initialized so that the source data is the intra-month data group for the month before January, the intra-month data group for the month before February, and the intra-month data group for the month before March. A diagram display window is prepared and can be displayed.

[0007]

Since the conventional configuration is as described above, there is a problem in that different source data cannot be easily compared. That is, conventionally, in the case of comparing the change state of the intra-month data of this month with the change of the intra-month data of April, the only method is to alternately see the two trend diagram display windows.

[0008] Here, it is also possible to display the above-mentioned intra-month change state of the two months in one trend diagram display window. This can be done by changing the initial setting condition of the trend diagram display window that displays the trace showing the monthly change of the data of this month. For example, two traces may be displayed, and the source data of the trace to be displayed may be the intra-month data group of the current month and the intra-month data group of four months ago.

However, the change of the initial setting condition is nothing but the change of the setting condition of the device operation in the process control device, and cannot be changed normally. Even if the initial setting conditions for the display of the trend diagram display window are changed, if other setting conditions are changed by mistake, process control may not be performed normally.

Further, as described above, in the trend diagram, the information obtained is changed by changing the display state. As mentioned above, if you change the initial setting conditions so that the data of different months can be displayed in the same window, if you forget to restore this state, the month before April, which is historical data, will be displayed. In some cases, the trace showing the change in the internal data may be mistaken for the trace showing the change in the monthly data for the current month.

For the reasons described above, in the process control device, even the initial setting condition of the trend diagram display window cannot be changed by a person other than the dedicated manager. That is, conventionally, it has been almost impossible to display, for example, two traces showing the intra-month change of the current month and the intra-month change of four months ago in one trend chart window.

The present invention has been made to solve the above problems, and it is an object of the present invention to make it possible to compare different source data with the same trend diagram by a simple operation.

[0013]

The trend diagram display method of the present invention is a first method for displaying a trace by selecting the trace displayed in the first window.
Of the first data group stored in the buffer memory by selecting a predetermined position in the second window.
Is displayed from a predetermined position using the coordinate system in the window.

[0014]

The trace consisting of the first data group is displayed in the second window without changing the display setting condition of the second window.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Here, the present invention will be described by using, as one of certain cases, a case of comparing a change in monthly data in January before April with a change in monthly data in May. FIG. 1 is a trend chart showing the intra-month change of data in January of a year, and 1 shows the change of data obtained from a control target device A from January 1 to January 16. It is a trace and is displayed in the window 11 showing the January trend chart.

FIG. 2 is a trend chart showing the intra-month change in the data in May, which is the current month, and 2 shows the change in the data obtained from the device A from May 1 to May 16. It is a trace and is displayed in the window 12 showing the trend chart for May.

Here, in the conventional case, the window 11 has 1
Only the changes in the data obtained from device A over the month can be shown, here the 5 shown in window 12
Presenting lunar data was very difficult as explained in the prior art. However, in this embodiment, two pieces of data can be easily displayed in the same window by copying the display data as follows. First, by selecting the trace 1 in the window 11 with the pointer 3 using a mouse, for example, the source data for displaying the trace 1 is temporarily copied to the buffer memory that holds this data.

Next, the window 12 is selected again by, for example, placing the pointer 3 using the mouse at that position, and the desired position in the trace 2 display area, for example, the data of May 5 is selected. Select the date position where is displayed. As a result, the source data for displaying the trace 1 in the window 11 copied to the buffer memory is used, and the coordinate system of the window 12 is used from the position selected by the pointer 3 in the window 12 As shown in 3, the trace 1a is displayed. However, in this case, since the position selected by the pointer 3 is the 5th of May in the window 12, the 12th is displayed in the source data indicating the state of January,
Data after January 13 are not displayed.

Next, as shown in FIG. 4, by moving the pointer 3 with the mouse on the portion of the trace 1a showing the data of January 1st, the window of May 1st in this window 12 is displayed. Move to the date position. As a result, the trace 1a displayed by the source data in the buffer memory is displayed.
Indicates that all the data up to January 16 are displayed, and the data for January and the data for May can be viewed on the same coordinates.

The display of the January data uses the source data for displaying the trace 1 in the window 11 in the buffer memory. For this reason, if the window 12 is newly displayed again, the data in the buffer memory will be erased. Therefore, another person may display the window 12 to newly see the change in the current month's data. However, the trace showing the change in January data is not displayed here.

According to the above embodiment, the data of two months can be easily displayed in an overlapping manner. However, the present invention is not limited to this, and the data of three months can be displayed in an overlapping manner as described above. The data may be displayed, and it is also possible to overlay and compare data of three or more different months. Also,
In the above embodiment, the trend diagram showing the time change of the monthly data group is shown, but the present invention is not limited to this.
Even if the source data of the traces to be superimposed have different summation intervals, they can be displayed in the same manner.

In the above embodiment, the comparison of data obtained by actual measurement has been described, but the present invention is not limited to this. It may be used for comparison between the trend diagram based on data that changes with time obtained by theoretical calculation such as simulation and the trend diagram based on data obtained by actual measurement as described above. Play.

[0023]

As described above, according to the present invention, the source data is temporarily stored in the buffer memory,
Also, since the trace by the source data group in the buffer memory is displayed even in different windows, the effect that different source data can be compared with the same trend diagram with a simple operation without adversely affecting others There is.

[Brief description of drawings]

FIG. 1 is a trend chart showing source data for January.

FIG. 2 is a trend chart showing source data for May.

FIG. 3 is a trend diagram showing a state in which a trace of January data is displayed in the May source data display.

FIG. 4 is a trend diagram showing a state in which a trace of January data is displayed in the May source data display.

FIG. 5 is a trend chart showing a monthly change in data of a process to be controlled in the process control device.

[Explanation of symbols]

1, 1a, 2 ... Trace, 3 ... Pointer, 11, 12 ...
Window.

Claims (2)

[Claims] 1. A first prepared with time change prepared in advance.
A first window for displaying the first data group as a trend diagram by tracing the data group of No. 1 with a set of points indicating values corresponding to the steps on the time axis with the horizontal axis as the time axis; The second data group with
A second window for displaying the second data group as a trend diagram by a trace consisting of a set of points showing values corresponding to the steps on the time axis with the horizontal axis as the time axis, and the first and second windows. And a buffer memory for temporarily storing the first or second data group displayed by tracing in the first or second window. By selecting the trace displayed in the window of No. 2, the first data group for displaying this trace is stored in the buffer memory, and by selecting a predetermined position in the second window. Displaying a trace using the first data group stored in the buffer memory from the predetermined position in the second window using its coordinate system A method of displaying a trend diagram. 2. The trend diagram display method according to claim 1, wherein the trace display position of the first data group in the buffer memory displayed in the second window is changed to change the second The method for displaying a trend diagram is characterized in that the start positions of the traces of the second data group displayed in the window of and the traces of the first data group in the buffer memory are made the same.