JPH0321821A - Picture display device - Google Patents

Abstract

PURPOSE:To refresh display data at high speed by providing a process data number table forming part and a preferential processing part. CONSTITUTION:Process data from input/output devices 1a-1n are inducted to a man-machine interface device 30 through a process input/output device 20 and a selected picture is displayed based on a picture selection signal from a control panel 4. The process data number table forming part 31 is provided in the interface device 30 and it forms the process data number table of every corresponding picture, then transmits the process data number table corresponding to the picture to the input/output device 20 at the time of selecting the picture by the control panel 4. The preferential processing part 21 is provided in the input/output device 20 and preferentially processes the data written in the table at the time of receiving the process data number table.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a screen display device that is used in supervisory control systems and the like and displays a system diagram or the like on a screen.

B. Summary of the Invention The present invention provides a screen display device in which a MMI (man-machine interface device) unit creates a process data number table for each screen when creating a display screen, and when a screen is selected from an operation console, a process data number table corresponding to the screen is created. A process data number table creation section that sends the data number table to the PIO (process input/output device) section, and a priority processing section that processes the data written in the table with priority after receiving the sent table. By providing this, it is possible to speed up the refresh of screen display data during screen display.

C. Prior art FIG. 5 shows a screen display device used in a supervisory control system, where 1a=In is an I/O (input/output device) section;
2 is a Pro section into which process data from 1a to In is input. 3 is an MM, 4 is an operation console, and 5 is a CRT.

The PIO section 2 sequentially takes in process data from each I/O section 1a-In, and when a change in process status is detected, performs a state change detection process and sequentially sends the process data to the MMI section 3. Based on the screen selection signal commanded through the console 4, the MM1 unit 3 creates a screen corresponding to the command from the data from the PIO unit 2, and displays the system diagram etc. on a CRT.
Displayed on 5.

D. Problem to be Solved by the Invention The MM1 section 3 takes in process data from the PTO section 2 at a faster cycle, and this operation is the same even when the screen is displayed, but the important thing is that the screen data being displayed is When a state change occurs, it is required that the refresh be performed at high speed.

However, when there are a large number of I/O units and their data, or when data status changes occur frequently in each I/O unit 1a to 1n, the transmission of the data to the MMI unit 3 becomes slow.
As a result, the screen data is refreshed slowly, which poses a problem that adversely affects device control related to this.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a screen display device that can be displayed at high speed.

E. Means for Solving the Problems The present invention provides a screen display device in which a process data number table is created for each screen when a display screen is created, and when a screen is selected on a console, the process number table corresponding to the screen is stored in a PIO unit. A process data number table control unit is provided in the MMI unit to send out process data number tables. Also, PIO
The section is provided with a priority processing section that preferentially processes data written in the table sent from the MMI section.

F. The action MM1 section also creates a process data number table when creating the display screen and sends it to the PIO section.

P I O ii {When process data is imported from the I/O section, it is determined whether or not there is a process data number table, and if there is, the data defined in the table is processed preferentially. do.

G. Embodiment FIG. 1 shows an embodiment of the present invention, and the same parts as in FIG. 5 are given the same reference numerals and their explanation will be omitted. 20
is a PIO unit which includes a priority processing unit 2I. 30 is M
In the MI section, the MM1 section 30 has a process data number table creation section 3l. When creating a display screen, the table creation unit 31 creates a process data number table corresponding to this screen for each screen. Further, among the created tables, the table corresponding to the screen selected by the console 4 is sent to the PIO section 20. In addition,
The process data number table contains the addresses (I/O part numbers,
and data numbers therein).

Next, the operation will be explained using FIGS. 2 to 4.

The PIO section 20 sequentially takes in process data from each I/O section 1a-1n, performs predetermined processing such as state change detection processing, and then sends the data to the MMI section 30. The MM1RO 30 creates a screen such as a system diagram based on this data, and at this time, the display screen is created according to the processing flow shown in FIG.

That is, in step S, a display screen is created in the same manner as in the past, and in step S, a process data number table is created.

The created display screen data and table are stored in the MMl section 3.
0, and the screen display is performed as shown in FIG. First step S. When a drawing of a certain system diagram is selected via the operation console 4, the MMI-ro 30 proceeds to step S.
At +2, the display data of the drawing is taken out from the memory, outputted to the CRT 5, and displayed on the CRT. MMI
The unit 30 outputs display data to the CRT 5, and in step S13 outputs a process data number table corresponding to the selected screen to the PLO unit 20.

FIG. 4 shows the processing flow of the PIO section 20. As described above, the PIO section 20 has each I/O section 1a to In
Is it possible to import more process data sequentially? At this time, it is determined in step S■ whether or not there is a process data number table sent out from the MMI section, and if not, the process moves to step St* and the data of each I/O section is sorted according to the determined order. The processing result is notified to the MMI unit 30 (step S, 4). S. If the table exists, the process moves to step S23, where the data defined in the process data number table is processed preferentially and the result is sent to the MM1 section 30. That is, since the data related to the screen during boundary display is processed immediately, the display of state changes can be performed at high speed.

H. Effects of the Invention According to the present invention, the PIO section inputs the process data number table from the MM1 section, processes the process data used on the display screen with priority, and sends it to the MMI section. Therefore, display data can be refreshed at high speed.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing one embodiment of the present invention, Figures 2 to 4
Each figure is a process flow diagram for explanation, and FIG. 5 is a configuration diagram of a conventional screen display device. la=In... input/output device, 2o... process input/output device, 2I... priority processing section, 3o... man-machine interface device, 3l... process data number table creation section, 4...・Operation console, 5...CRT0 outside 2
Name Figure 1 Present invention Figure 2 Figure 3 Figure 4 PI○ part processing flow

Claims (1)

[Claims] (1) Process data from multiple input/output devices is introduced into the man-machine interface device via the process input/output device to act on the display screen, and a selection screen is displayed based on the screen selection signal from the operation console. The man-machine interface device is provided with a process data number table for each screen, which operates on a process data number table corresponding to each screen when a display screen is activated, and processes a process data number table corresponding to the screen when a screen is selected on the console. A process data number table creation unit that sends out to the input/output device, and a priority processing unit that is provided in the process input/output device and processes data written in this table with priority when receiving the process data number table. A screen display device comprising: