JPS626295A - Crt screen cyclic display system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field to which the Invention Pertains] This invention relates to displaying any plurality of CRT screens out of all CRT screens stored in a process control computer system on the same CRT display device at regular intervals. This invention relates to a CRT screen display method that enables automatic cyclic display.

[Prior art and one problem] In a process control computer system, a plurality of CFLT screens including process monitoring screens and the like are used. In such systems, it is necessary to display multiple CRT screens on the same CRT display device for purposes such as monitoring, but in conventional systems, an operator has to perform a display request operation each time. Ta. For this reason, there were the following problems.

(b) The operator must perform the display request operation at @search.

(Proboscis Display request operations are performed frequently, making it easy for errors to occur.

[Purpose of the invention]

The present invention solves the above-mentioned problems by using a minimum CRT.
C that makes it possible to display multiple 081 screens on the same CRT display device by screen display request operation
The purpose of this invention is to provide a cyclic display method for the R'l' screen.

[Key points of the invention]

This invention provides for storing arbitrary plural screen numbers in advance in a screen number storage device corresponding to a CRT display device among the screen numbers provided for uniquely managing all the CRT screens stored in a process control computer. By pressing a dedicated function key provided on the operator console device, the CRT screen corresponding to the first screen number stored in the screen number storage device is displayed on the CRT display device. The CRT screen corresponding to the screen number stored in the screen number storage device is displayed on the CRT display device at regular intervals by the internal clock of the control computer.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the present invention, in which a CRT screen storage device 1 stores all CRs of a process control computer system.
The screen number storage device 2 stores any plurality of screen numbers corresponding to the CB and T display devices 3, and the display program storage device 4 stores the screen numbers stored in the screen number storage device 2. A display program for reading a corresponding CRT screen from the CRT screen storage device 1 and displaying it on the CRT display device 3 is stored. The screen number stored in the screen number storage device 2 can be arbitrarily written by the operator using the operator console device.

In such a configuration, the operator console device 5
By pressing the dedicated function key provided in the display program storage device 4, the display program stored in the display program storage device 4 is activated by an interrupt, and the display program corresponds to the screen number stored at the beginning of the screen number storage device 2. Read the CRT screen to be displayed from the CRT screen storage device 1
It is displayed on the display device 3. Thereafter, the internal clock 6 of the process control computer starts the display program stored in the display program storage device 3 at regular intervals.
Each time the display program is tilted, the screen number stored next to the previously processed screen number in the screen number storage device 2 is stored (however, if the previously processed screen number ゛ is stored last, it is stored first). CR corresponding to screen number)
The T screen is read from the CRT screen storage device 1 and displayed on the CRT display device 3.

FIG. 2 is a flowchart showing the operation of the above display program. First, when the function key for cyclic display request is pressed, the cyclic display flag is turned "ON" in step S1 in FIG. 2(a).
Next, in step S2, a cyclic display program is started. The cyclic display program operates as shown in FIG. 2(b), and first, in step S3, the pointer in the screen number storage device 2 is initialized. This results in
In step S4, the screen number stored at the beginning of the screen number storage device 2 is read out, and the screen corresponding to this number is read out from the CRT screen storage device 1 and displayed on the CRT display device 3. Next, in step S5, it is determined whether the cyclic display flag is "ON", and if it is not "ON", the cyclic display is terminated, but if it is "ON", the process proceeds to step S6 and the fixed period is Determine whether the time has passed. When a certain period has elapsed, the pointer in the screen number storage device 2 is updated in step S7, and then the process returns to step S4, where the screen corresponding to the second screen number stored in the screen number storage device 2 is displayed. Ru. In this way, during the period when the cyclic display flag is "ON", the screen number storage device 2
The screen with the screen number stored in is displayed cyclically at a fixed period. This cyclic display is done so that when a function key for another screen operation is pressed, the cyclic display flag is turned OFF in the program for that screen operation, as shown in Figure 2 (C). By providing step S8, the process can be completed at step S5 in FIG. 2(b).

〔Effect of the invention〕

According to this invention, a plurality of arbitrary screen numbers are stored in advance in a process control computer, and the first CRT
Once the screen display request operation is performed, any number of CRs stored by the internal clock of the process control computer will be displayed.
Since the T screen can be displayed cyclically and automatically on the same CRT display device, the following effects can be obtained.

(1) Only one display request operation is required to display any plurality of CRT screens on the same CRT display device.

(2) Since the display request operation only needs to be performed once, erroneous operations are eliminated.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of an apparatus for carrying out the CRT screen cyclic display method according to the present invention, and FIG. 2 is an operational flowchart for carrying out the cyclic display. 1... CI (T screen storage device, 2... Screen number storage device, 3... CRT display device, 4... Display program storage device fffi, 5... Operator console device, 6... Age 1 (2) Age 20

Claims (1)

[Claims] 1) A CRT screen storage device that stores all CRT screens of the system, a screen number storage device that stores any number of screen numbers in the CRT screen storage device, and screen numbers stored in the screen storage device. a display program storage device storing a display program for reading a corresponding CRT screen from the CRT screen storage device and displaying it on the CRT display device, the screen being stored in the screen number storage device upon activation of the display program; number C
A CRT screen cyclic display method characterized in that an RT screen is sequentially and cyclically displayed on the CRT display device at a constant period.