JPS62204306A - Designing device for sequence control system - Google Patents

Abstract

PURPOSE:To easily and completely design a stepsequence system by performing an interactive operation with reference to a sequence design screen, a time chart screen and a shift condition screen. CONSTITUTION:When an operator selects a sequence design mode at the starting time of a designing action, a basic pattern DD of an area 3D of a ROM 3 is read and displayed. At the same time, the file contents developed to an area 5D of a RAM 5 are displayed at the corresponding part on a screen. Then the operator supplies the information to the screen DD of a table form via a keyboard 9B. Thus it is checked whether said input of information indicates the end of the sequence design mode or not. If not, the input information is developed to a sequence design file 5D as well as to the areas corresponding to a time charge file 5T and a shift condition file 5C respectively. Thus it is possible to easily design a step sequence system at a low cost by carrying out an interactive operation with reference to those three different types of screens.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a sequence control system design device,
Specifically, the present invention relates to a device for designing a program for a sequence control system using a display device such as a CR7 and an input device such as a keyboard.

5 [Prior art] Conventionally, when designing a sequence control program for a control system that performs sequence control on a controlled object through sequential control steps (hereinafter referred to as a step sequence system), the following steps have been taken: It was done in steps.

FIGS. 7(^) to (C) show conventional design aspects. When designing, first create a state transition diagram like the one shown in the same figure (^), and mark each step as "1".

"2", . . . are defined, and the state of the output signal at each step is defined to obtain the time chart as shown in FIG. 3B. Finally, input signals serving as conditions for transition between steps are defined on a ladder diagram as shown in FIG.

[Problem that the invention seeks to solve]

However, in this design mode, there is a problem that the design is complicated and errors are likely to occur, especially when the step sequence system related to programming is large-sized.

On the other hand, with the recent rapid progress in computer technology, especially microcomputer-related technology, computer-aided design systems have appeared, and it is conceivable to use these to assist in the design of step sequence systems.

However, when considering a design device that designs a step sequence system in an interactive manner using a display screen such as a CRT and an input unit such as a keyboard, and outputs documents such as drawings using a printer, it is especially important to use a state transition diagram. Inputting and setting the information using a CRT screen and keyboard makes the operation extremely complicated, making it impossible to realize a design device at a low cost.

[Means for solving problems]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus that can solve these problems and easily and inexpensively design a step sequence system.

Therefore, in the present invention, as shown in FIG. 1, an input means 1 for inputting design information of a sequence control system.
00, a display means 11G for displaying design information,
A first mode in which settings are made by associating each process of the sequence control system related to the design with its input signal and output signal, a second mode in which settings are made in correspondence with each process and the output signal related to that process, or transition. a selection means 120 for selecting one of the third modes in which settings are made by associating the pair of processes related to the input signal with the input signal serving as the transition condition;
A first storage means 130 stores a table display format for making settings in the first mode, and a second storage means 130 stores a time chart display format for showing correspondence in the second mode.
a storage means 140, a third storage means 150 that stores a display format for indicating the correspondence in the third mode, and a first storage means 150 that stores the correspondence in the first mode, the correspondence in the second mode, and the correspondence in the third mode, respectively. When one of the modes is selected by the second and third storage means 160, 170 and 180 and the selection means 12G,
The contents of the storage means and the storage means corresponding to the mode are read out and displayed on the display means 110, the display is updated according to the input of design information from the input means 10G, and the design information is transferred to the first to third storage means. and a design control means 190 which is expanded to 160-180.

(Function) That is, in the present invention, for example, input signals that are conditions for moving to each process that is important in designing a sequence control system and output signals in that process are set in a table format in the first mode. Then, you can extract the output signal from these settings and display a time chart on the screen, and you can also set the output signal state of each process in more detail. In addition, it becomes possible to extract the input signal from the settings using a table and display the transition conditions, and to set the transition conditions in more detail.

〔Example〕

Embodiments of the present invention will be described in detail and specifically below based on the drawings.

FIG. 2 shows an example of the configuration of a program designing device for a sequence control system according to the present invention. Here, reference numeral 1 denotes a CPU that controls each part according to a processing procedure described later with reference to FIG. 3, and has the form of, for example, a microprocessor. 3 is a fixed memory, for example, a ROM, and in addition to an area 3P storing the processing procedures shown in FIG. 3, a sequence design screen for program design (see FIG. 4 (^)), and a time chart screen 3T ( It has areas 3D, 3T, and 3C that store the basic patterns of the transition procedure screen (see FIG. 5(^)) and the transition procedure screen (see FIG. 6(A)), respectively.

Reference numeral 5 denotes a writable/readable RAM, which stores a sequence design file (see Figure 4 (B)) and a time chart file (see Figure 5 (B)) for developing information according to operator input, etc. and migration condition file (Figure 6 (B)
)) are respectively stored in the areas 50, 5T and 5C.
has.

Reference numeral 7 denotes an output unit for outputting information as appropriate during designing, etc., and can be, for example, a recording device. It is also possible to connect external storage devices such as CMT devices and disk units. Reference numeral 9 denotes a console unit used by the operator during the design process, and includes a display device 9A such as a CRT for displaying the above-mentioned screens and input information.
and an input section 9B such as a keyboard for inputting information.

Note that the display device 9A may be, for example, an LCD. Moreover, a mouse, a joystick, etc. can also be used as the input unit 9B.

1 is a path line which connects the above-mentioned parts and collects address signal lines, control signal lines, and data signal lines.

In this example, a sequence design mode is set using key input signals for moving to each step (process) that is important in step sequence design, and an output signal in that process, and an output signal is set from the settings. There is a time chart mode in which the output time chart is displayed on the screen and the output signal status of each step is set in more detail. By appropriately using the transition condition mode to set the transition condition in more detail, it is possible to design a step sequence system without using a state transition diagram, which is a problem in constructing a design device at a low cost. do.

FIG. 3 shows an example of a design processing procedure according to this embodiment. Also, Figure 4 (A), (B), Figure 5 (A),
(B) and FIGS. 6(^) and (B) show display contents and file contents in each mode, and the design process of this embodiment will be explained using these figures.

At the start of the design process, an initial screen with contents such as prompting the operator to select a mode is displayed in step 51 of FIG.
When the operator selects the sequence design mode, time chart mode, or transition condition mode in step S3 in response to this, the corresponding process is performed in accordance with the mode determination (step S5).

When the operator selects the sequence design mode at the start of design, the process advances to step 501. As shown in FIG. 4(A), in step S01, the basic pattern D of the area 30 of ll0M3 is
D is read out and displayed, and at the same time, the contents of the file developed in the area 5D of the RAM 5 are displayed in the corresponding part on the screen. However, since no information has been developed in the sequence design file at the start of design, only the basic pattern is displayed.

When the operator inputs information using the keyboard 9B in step SD3 on this tabular screen DD, step 504
It is determined whether the information input is a command to end the sequence design mode, and if the determination is negative, the input information is expanded to the sequence design file 5D, as well as five time chart files and transition conditions. Expand to the corresponding area in file 5C and return to step SDI. In addition, if an affirmative determination is made in step SD5, step S
Returns to 1 and waits for mode specification.

Through the processing of steps 501 to S07, the operator sets, for example, "INI" as the input signal to be the condition for moving to step "1" and the output signals "0UTI" and "0IIT2" to be output in step "1". Input,
Next, regarding step "2", the input signal "IN2" and the output signals "0UT3" and 0UT4 output at step "12" are the same conditions for moving to step "2".
and “0UT5” when inputting the tiger setting, the 4th
A sequence design file 5D as shown in Figure (B) is created.

Next, when the operator selects the time chart, the process of step STI N5T7 is activated. These processes are performed in the same manner as in step 5DI-507 above regarding the three areas of ROM3 and the area 5T of RAM5, but
After going through the sequence design mode, since writing has been done in the corresponding area of the time chart file 5T, the 20 basic putters on both sides of the time chart are displayed in accordance with the contents.

For example, in the procedure for obtaining the file storage display as shown in FIGS. 4(^) and (B), at step "1", "0U
Since "TI" and "011T2" are output, "0LITI" and '0UT2' are stored in the area corresponding to step "l" on the time chart file 5T as shown in FIG. 5(A). .

Also, at step °°2", it is "'0UT3".

0UT4" and °'0UT5°° are output, so
“01lT3”, “0UT4” and 01l are also included in the area corresponding to step 2 on the time chart file 5T.
Furthermore, since "0IITI" and "'0UT2" do not change in step "2", "0UTI" and "0UT2" are stored in step "2" in the time chart file 5T. There is.

In this way, the time chart screen DT as shown in FIG. 5(A) is obtained from the time chart file 5T as shown in FIG. 5(B). Furthermore, by referring to the screen, the operator can easily modify the output.

Next, when the operator selects the transition condition mode and also specifies, for example, the own step and the destination step, the processes of steps SCI to SC7 are activated. These processes are also performed in the same manner as steps 501-507 regarding the area 3C of the ROM3 and the area 5C of the RAIA5.

FIG. 6(^) shows an example of the transition condition screen DC. Here, Pl and Pl are areas for displaying the own step and the destination step related to the transition, respectively. F.A.
PB and PC are respectively indicated FAA and POB
' and PAC, and is used to calculate the logical AND of the input signals set there and set the result as "A", and is used to calculate the logical sum and set the result as "B". PGl', PG2°, and PG3° are the final calculations for the calculation results “A” to “C”, respectively. This is the content display part, and the selection is display PG, 1.Display content of PG2 and PC3 "Gl"
, "G2" and "G3" are input.

FIG. 6(B) shows files provided in the file 5C corresponding to each of a pair of step groups related to migration,
It has areas FA-FC1 for storing input signals related to calculations corresponding to areas P^ to PC on the screen, respectively, and an area FG for storing the specified contents corresponding to the final calculation designation.

Here, for example, in the sequence design file 5D, the key number 8 for transitioning from step "l" to step "2" is "IN2".Thereby, from step "1" to step "IN2" on the transition condition file 5C. “IN2” is stored in the file corresponding to the transition to “IN2”. Therefore, when the transition condition mode is selected and a pair of steps "1" and "2" related to transition are specified, step "1"
” to step “2”, the glue line condition screen O
C is displayed.

That is, by performing steps 5CI-5 and 7, the operator can use the display screen DC to specify, for example, an input signal other than "IN2" as a transition condition, a logical operation, and a definition of the final operation combination. Become.

That is, according to this embodiment, a step sequence system can be designed easily and reliably by performing operations in an interactive manner while referring to the B fffi screen. Furthermore, by outputting the contents of screens and files using the output unit 7, desired drawings can be obtained in the design process.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to realize a design device that can easily and inexpensively design a step sequence system.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of the present invention; FIG. 2 is a block diagram showing an embodiment of the present invention; FIG. 3 is a flowchart showing an example of a design processing procedure according to the embodiment shown in FIG. 4; (A) and (B) are explanatory diagrams showing the display mode and file storage mode in the sequence design mode, respectively. Figures 5 (A) and (B) are the display mode and file storage mode in the time chart mode. FIGS. 6(A) and (II) are explanatory diagrams showing the display format and file storage format in the transition condition code, respectively. FIG. 7 (8) to C) is FIG. 2 is an explanatory diagram showing a design aspect of a conventional step sequence system. l...cpu. 3...ll0M. 3D...Sequence design screen storage area, 3T...Time chart screen storage area, 3C...Transition condition screen storage area, -5...RAM. 50... Sequence design file, 5T... Time chart file, 5C... Transition condition file, 7... Output section, 9... Console section, 9^... Display device, 9B... Input section, DD, DT, DC...display screen. Figure 1jI2 Figure 3 (A) CB) Figure 4 (A) Figure 5 (A) CB) Figure 6

Claims (1)

[Claims] An input means for inputting design information of a sequence control system, a display means for displaying the design information, and each process of the sequence control system related to design and its input signals and output signals. A first mode in which settings are made by making them correspond to each other, and a second mode in which settings are made by making a process correspond to an output signal related to that process.
a selection means for selecting either mode or a third mode in which settings are made by associating a pair of steps related to the transition with an input signal serving as a condition for the transition; and performing the settings in the first mode. a first storage means storing a display format of a table for indicating the correspondence in the second mode; a second storage means storing a display format of a time chart for indicating the correspondence in the second mode; and a second storage means storing a display format of a time chart for indicating the correspondence in the third mode. a third storage means storing a display format of the above, and first, second and third storage means storing the correspondence in the first mode, the correspondence in the second mode and the correspondence in the third mode, respectively. and when one of the modes is selected by the selection means, the contents of the storage means and storage means corresponding to the mode are read out and displayed on the display means, and in response to design information input from the input means. 1. A design device for a sequence control system, comprising: a design control means for updating said display and deploying said design information in said first to third storage means.