JPH09244859A - Display method for trend graph for display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable high-speed plotting and to improve visibility by displaying a line while thickening it during a trend but thinning the line during scroll, and increasing the amount of data to be displayed while the scroll function is selected. SOLUTION: When scroll select button switches 11 and 12 are turned on, a trend picture displayed in a trend plotting area is scrolled in the designated direction. A display device 10 exchanges data and a command with a CPU and performs a display operation based on the arithmetic result of the CPU. Namely, ordinary measured data are displayed while thickening the line of graph data during the trend. Besides, when displaying any section that is not displayed on a CRT screen any more, the scroll displayed on the screen is selected so that the data in the past are read in and the line can be plotted in the size of one dot and while the scroll select button switches are selected longer than (n) seconds, the number of scroll data are made m-fold so that the desired data to be watched can be speedily scrolled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying a trend graph on a display device.

[0002]

2. Description of the Related Art Data from a measuring device is accumulated in a disk in a CPU from an arithmetic processing unit (hereinafter abbreviated as CPU), and the data is graphically displayed on a display unit (hereinafter abbreviated as CRT). When reading and displaying past data in the system, CRT
It is displayed by scrolling on the screen.

[0003]

In the conventional trend graph display method, if the CRT has a hard scroll function, the price of the CRT becomes high and the line drawn when the trend is scrolled by software. If it is thin, you can draw quickly, but the visibility is poor. On the contrary, if the line thickness is increased, the visibility is improved, but the scroll speed becomes extremely slow.

The present invention has been made in view of the above problems, and an object thereof is to provide a method of displaying trend data which enables high-speed drawing and has excellent visibility.

[0005]

In order to achieve the above object, a trend data display method according to the present invention is a data display method in which data is arithmetically processed by an arithmetic processing unit and the arithmetically processed data is displayed. , In the trend, the line thickness of the display element is made thicker and displayed on the display screen, and when displaying the display element that is no longer displayed on the display screen, the past data is read from the above-mentioned arithmetic processing and the line thickness is changed. It is characterized in that the width is reduced to draw it on the display screen and the number of scroll data is increased during scroll selection.

The trend data display method of the present invention is a method for displaying trend data in which data from a measuring instrument is arithmetically processed by an arithmetic processing unit and the arithmetically processed data is displayed on a trend graph display unit. If it is being selected, if it is being selected, the thickness of the trend line is thinned, and if it is being scrolled for a predetermined period or longer, it is judged. A predetermined number of times the number is drawn on the display screen of the display device, and the trend graph is drawn on the display screen unless scroll selection is in progress. It is characterized in that a thickened trend graph is displayed on the display screen.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

FIG. 2 is a schematic configuration diagram of a display device 10 for carrying out the trend graph display method of the present invention.
Reference numerals 11 and 12 are scroll selection switches, 13 is a pause command button switch, and 14 is a trend drawing area.

When the scroll selection button switch 11 or 12 is turned on, the trend screen is scrolled in the designated direction, and when the pause command button switch is turned on, scrolling is temporarily stopped.

The display device 10 sends and receives data and commands to and from a CPU (not shown), and performs a display operation based on the calculation result of the CPU. That is, the normal measurement data is displayed with a thick line of graph data during a trend. When you want to display a part that is no longer displayed on the CRT screen, select the scroll displayed on the screen to read the past data, draw a line with a line thickness of 1 dot size, and select the scroll. When the button switch is selected for n seconds or more, the number of scroll data is multiplied by m to quickly search for the desired data. When the scroll selection is canceled, the line thickness is restored to the original thickness.

FIG. 1 shows a subroutine for executing the above-mentioned trend graph display method. In step S1, it is judged whether or not scroll is selected. If it is selected (YES), the flow proceeds to step S2 to trend. Set the line thickness to 1 dot. Next, in step S3, it is determined whether scrolling is being selected for a predetermined period, that is, n seconds or more. If selected for n seconds or more (YES), step S
Then, the process proceeds to 4 and the number of scroll data is multiplied by a predetermined number, that is, m times. After the number of scroll data is multiplied by m, the process proceeds to step S5 to draw on the CRT.

In step S1, if scroll selection is not in progress (NO), that is, if pause is in progress, the flow advances to step S6 to increase the thickness of the trend line, and advances to step S5 to draw on the CRT. In step S3, if n seconds or more have not been selected (NO), step S3
Proceed to step 5 and draw on the CRT.

[0013]

As described above, the present invention has the following effects.

(1) Since the CRT device does not need to be provided with a special hardware mechanism, the price of the display device becomes low.

(2) It is possible to draw at high speed by reducing the thickness of the line during scroll selection.

(3) While scrolling is selected for n seconds or more, by multiplying the number of scroll data by m times, a user can quickly search for a desired place.

(4) The visibility of the operator can be improved by increasing the thickness of the line of the trend graph during the temporary stop and the normal display.

[Brief description of drawings]

FIG. 1 is a serve routine for executing a trend graph display method according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a display device for implementing the trend graph display method of the present invention.

[Explanation of symbols]

 None

Claims (2)

[Claims] 1. A data display method for processing data by a processing device and displaying the processed data, wherein a line of a display element is thickened and displayed on a display screen during a trend, When displaying a display element that is no longer displayed on the display screen, the past data is read from the arithmetic processing, the line thickness is thinned and drawn on the display screen, and the number of scroll data is increased during scroll selection. A method of displaying a trend graph on a display device, comprising: 2. In a trend data display method in which data from a measuring instrument is arithmetically processed by an arithmetic processing device and the arithmetically processed data is displayed on a trend graph display device, it is determined whether or not scroll selection is being performed. If the trend line is being selected, the thickness of the trend line is reduced, and it is determined whether or not the scroll is being selected for a predetermined period or longer. If the scroll graph is drawn on the display screen and the scroll graph is not being selected, the trend graph is drawn on the display screen, and if the scroll line is not being selected for the predetermined period of time or more, the trend graph with a thicker trend line is displayed on the display screen. A method of displaying a trend graph on a display device, comprising: