JPH04280301A - Control program design support system - Google Patents

Abstract

PURPOSE:To execute I/O data registering work and program for control editing work in parallel while looking at the same display, to improve work efficiency, and to prevent an artificial fault such as the input mistake of I/O data and the like. CONSTITUTION:A task control part 11 controlling an interruption signal from outside to a computer body 10, an I/O data registration part 12 difining and registering I/O data, a logic editing part 13 editing a program for control with graphic input, and an I/O data management part 14 managing and controlling the going in and out of data in the I/O data file 17 are provided for a computer system generating a program for controlling a plant in a graphic input system and an input equipment 15 and a window display device 16 are connected with the task control part 11. Plural windows for displaying the result of process and input are displayed simultaneously on the screen of the window display device 16, and I/O data registering work and program for control editing work are executed in parallel.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control program design support system for creating a plant control program.

0002

[Prior Art] Conventionally, plant control programs have been created using programming languages, but in recent years, symbols (hereinafter referred to as A control system design CAD system that can create control programs simply by arranging elements (called elements) and connecting signal exchanges between elements with lines has been developed and is being put into practical use. An example of this control system design CAD system is shown in FIG.

In FIG. 3, reference numeral 1 denotes a computer main body, which is equipped with an I/O data registration means 2 and a logic editing means 3, one of which is selected by a changeover switch 4, and an input device 5 and a display device 6.
It is designed to be connected to. Further, the I/O data registration means 2 and logic editing means 3 are connected to the I/O data file 7.

In order to create a control program using the above conventional system, first, the input device 5 specifies "I/O data registration processing", and the I/O data registration means 2 registers the input/output data with the plant. They are defined sequentially and registered and stored in the I/O data file 7. After the registration work is completed, "logic editing processing" is designated from the input device 5, and the control program is edited using the already registered I/O data.

[0005]

[Problem to be Solved by the Invention] In conventional control program design support systems, the logic editing work is started after the input/output signals with the plant have been defined and registered. If it becomes necessary to additionally register I/O data during the process, first finish the logic editing work, execute the I/O registration means, add the necessary data, and then start the logic editing work again. I had to.

[0006] Furthermore, since the contents of the registered I/O data are recorded and the registered data is specified by using the registered data name or registration number when editing the logic, data input errors etc. There was also a problem that the probability of human error occurring was high.

The present invention has been made in view of the above-mentioned circumstances, and allows I/O data registration work and control program editing work to be performed in parallel while viewing the same screen, thereby improving work efficiency. Another object of the present invention is to provide a control program design support system that can reliably prevent human errors such as input errors in I/O data names.

[0008]

[Means for Solving the Problems] A control program design support system according to the present invention is a computer system that generates a plant control program in a graphical input format, and is provided with an I/O data file that defines input/output signals to and from a plant. , an I/O data management means for managing and controlling the entry and exit of data in this I/O data file, an I/O data registration means for defining and registering I/O data, and editing of the control program by graphical input. a logic editing means for controlling the execution of the I/O data registration means and the logic editing means, and a task control means for controlling external interrupt signals; The present invention is characterized by comprising a window display device that displays a plurality of windows at the same time, and an input device equipped with function keys for inputting arbitrary alphanumeric characters and selecting a process.

[0009]

[Operation] First, the name, registration number, and channel number where the I/O point is located regarding the input signal to the plant are stored in the I/O data file.

The I/O data management means controls data writing and reading from this file. Specifically, when a plurality of processing means come to write data at the same time, data write permission is given to each processing means, or a write prohibition command is issued to each processing means. The I/O data registration means inputs information to be stored in the I/O data file via an input device and performs processing up to storing the information in the file. The logic editing means arranges "elements" representing graphical control calculation processing on the display screen, connects the elements with lines, and edits the control logic. The task control means controls the other processing means to be executed in a time-sharing manner so that a plurality of processes appear to be executed simultaneously and in parallel. Further, an input signal from an input device is also accepted as an interrupt signal, and execution of a process corresponding to the interrupt signal prepared in advance is started.

[0011] The window display device displays a plurality of windows on a display screen, and outputs and displays processing results and redisplays (echoes back) for confirming input values within each window.

0012

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

FIG. 1 is a block diagram showing the configuration of this system. In FIG. 1, 10 is a computer main body, which includes a task control section 11, an I/O data registration section 12, and a logic editing section 13.
, an I/O data management section 14. An input device 15 and a window display device 16 are connected to the task control section 11. The input device 15 is composed of, for example, a keyboard, a pointing device, etc., and has an alphanumeric input function for inputting I/O data names, etc., and various function keys for selecting processes. The window display device 16 displays a plurality of windows on a display screen, and performs redisplay (echo back) to confirm processing results and input values. Further, an I/O data file 17 is connected to the I/O data management section 14 . This I/O data file 17 stores names, registration numbers, channel numbers where I/O points are located, etc. related to input signals with the plant. Next, the operation of the above embodiment will be explained.

First, "logic editing process" is selected using the function key of the input device 15, and the logic editing section 13 starts editing the control program. An example of graphic input for the control program is shown in FIG. 2(b). The logic editing unit 13 arranges "elements" representing graphical control calculation processing on the display screen of the window display device 16, connects the elements with lines, and edits them as control logic. If it becomes necessary to register I/O data while editing a control program, select "I/O" from the input device 15.
"O data registration" is selected, and I/O data input processing is also executed in parallel by the I/O data registration unit 12. However, the term "parallelism" here is only apparent; in reality, the task control unit 11 executes one central processing unit (CPU).
) is controlled in a time-sharing manner so that multiple processing means can be used.

The I/O data registration unit 12 displays an I/O data table as shown in FIG. 2(c) on the screen of the window display device 16, and performs registration by filling in each column in the table. do the work.

The data that has been input on the screen is inputted by the I/O data management section 14 by inputting the "setting" key.
/O Written to data file 17. However, at this time, if the I/O data management unit 14 indicates that writing is prohibited, registration in the I/O data file 17 will be refused.

On the other hand, when using I/O data when editing logic, the same I/O table as when registering (Figure 2 (
After displaying c)) and changing the mode from "Register" to "Use", specify the data you want to use, and then specify the position on the sheet where you want to place it. However, even in this case, I/O
If the data management unit 14 prohibits the use of the data, this process is rejected. By the above procedure, I/
Data registration work and logic editing work can be efficiently carried out in parallel.

[0018]

[Effects of the Invention] As described above, according to the present invention, I/O data registration work and control program editing work can be performed in parallel while viewing the same screen, so work efficiency is greatly improved. do. In addition, simply by moving the data in the I/O registration table onto the editing sheet, I/O points can be placed on the editing sheet. It can also prevent common mistakes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a control program design support system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a screen display on a window display device in the same embodiment.

FIG. 3 is a block diagram showing a conventional system configuration.

[Explanation of symbols]

10...Computer body, 11...Task control unit, 12...I/O
Data registration section, 13...Logic editing section, 14...I/O data management section, 15...Input device, 16...Window display device, 17...I/O data file.

Claims (1)

[Claims] Claim 1: In a computer system that generates a plant control program in a graphical input format, an I/O data file defining input/output signals with the plant, and this I/O data file are provided.
I/O data management means for managing and controlling the entry and exit of data in /O data files, I/O data registration means for defining and registering I/O data, and logic editing for editing control programs by graphic input. means and said I/O
Controls the execution of data registration means and logic editing means,
and a task control means for controlling interrupt signals from the outside; a window display device for simultaneously displaying a plurality of windows for displaying processing and input results on one display screen; A control program design support system comprising: an input device having function keys.