JPH08263245A - Display picture preparing device for programmable display - Google Patents

Abstract

PURPOSE: To specify the control operation of a programmable controller and the display operation of a programmable display by displaying the symbol of the programmable display inside a single ladder program together with the symbol of that controller. CONSTITUTION: A programmable display 2 is connected to a display picture preparing device 1 only when preparing and correcting a program for specifying the display operation of the programmable display 2 and the control operation of a programmable controller 3. While the control operation to a controller 4 is executed, the programmable controller 3 simultaneously executes the exchange of data with the programmable display 2 and displays the symbol of the programmable display 2 inside the single ladder program together with the symbol of the programmable controller 3. Thus, the control operation of the programmable controller 3 and the display operation of the programmable display 2 can be specified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display screen creating apparatus for creating a display program that defines a display operation of a programmable display.

[0002]

2. Description of the Related Art A programmable controller (hereinafter, referred to as a PC) for performing sequence control of a controlled object in a factory or the like is connected with a programmable display device for displaying an operating state of the PC. Although the programmable display displays the operating state of the PC on the display unit, there is also a programmable display that displays an input switch that receives an operation command input to the PC as the display unit becomes larger. The display contents of such a programmable display differ depending on the control contents of the PC and the like. For this reason, a display program is created in a display screen creation device such as a personal computer, and the created display program is supplied to a programmable display.

Further, when a plurality of screens are switched and displayed on the programmable display, a plurality of independent display programs are created for each screen and are supplied to the programmable display.

[0004]

However, the display program (see FIG. 7A) supplied to the conventional programmable display is a general ladder program (FIG. 7B) as an operation program supplied to the PC. ) See) was composed of a different concept. Therefore, the control system designer needs to handle the data files of both the ladder program and the drawing program, and must be familiar with each program, which complicates the control system design work and change work. There was a problem.

When a programmable display is connected to a PC to form a control system, it is necessary not only to consider the operation of the PC when creating a display program for the programmable display, but also when creating an operation program for the PC. Must also consider the display behavior of the programmable display. For example, when the PC detects that the control device has generated an abnormality, the abnormality display instruction including a switching instruction to the display screen at the time of abnormality is displayed from the PC when the abnormality display instruction is displayed on the programmable display. Need to output to. Further, when the data displayed by the programmable display is data that is not necessary for the control operation of the PC, an operation program for calculating and storing display data that is not related to the control operation of the PC is set in the PC. Need to be kept.

As described above, even though the operation program of the PC and the display program of the programmable display are functionally related to each other, the respective programs are taken into consideration while considering the mutual relationships when creating each program. The programs have to be created separately, which also makes the work of creating the programs extremely difficult.

Further, for example, when there is an error in the address of the data register to which the data is written in the operation program of the PC, not only the operation program of the PC is corrected, but also the data to be read by the display program of the programmable display device. The address of the register must also be modified. In this way, even if an error in one program affects the other program, correction must be made in consideration of the effect of each program on the other program and the effect received from the other program. In addition, debugging work becomes complicated.

An object of the present invention is to enable the control operation of the PC and the display operation of the programmable display to be defined in a single program, facilitating the design work of the control system and the creation and debug work of the program. It is to provide a display screen creation device for a programmable display capable of performing the above.

Further, when a plurality of screens are displayed on the programmable display, by including the operation program of the PC only in the display program of the portion common to the plurality of screens, a plurality of display programs corresponding to the plurality of screens can be displayed. Eliminating the need to include a PC operating program in each
An object of the present invention is to provide a display screen creation device for a programmable display, which can reduce the amount of program data and prevent an increase in required memory capacity.

[0010]

According to a first aspect of the present invention, in a display screen creating apparatus for creating a display program to be supplied to a programmable display connected to a programmable controller, a symbol of the programmable display is a symbol of a PC. Along with this, a program display means for displaying in a single ladder program is provided.

According to a second aspect of the present invention, the display program includes a display program of a common part including an operation program of a PC and common to all of the plurality of display screens, and a common part for each of the plurality of display screens. It is characterized in that it is composed of a display program of the part to be excluded.

[0012]

In the invention described in claim 1, the program display means displays the symbols of the programmable display in a single ladder program together with the symbols of the PC. Therefore, the operation program of the PC and the display program of the programmable display are designed with the same concept by the ladder program familiar to the designer. In addition, the control operation of the PC and the screen display of the programmable display are designed together in the same control system.

According to another aspect of the present invention, a display program supplied to a programmable display device for switching and displaying a plurality of display screens is a common portion display program common to all of the plurality of display screens, and a plurality of display programs. The display program of the part excluding the common part for each of the screens,
The operation program of the PC is included in the common display program. Therefore, it is not necessary to include the operation program of the PC in all the display programs corresponding to each of the plurality of display screens, and the overall program data amount does not significantly increase.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the configuration of a system to which a display screen creating apparatus for a programmable display according to an embodiment of the present invention is applied. The control system 5 includes a control device 4 that is a target of sequence control, a PC 3 that executes sequence control of the control device 4, and a programmable display 2 that displays the operating states of the control device 4 and the PC 3. The display screen creating apparatus 1 is configured by a general personal computer, and the display screen creating apparatus 1 is programmable only when creating and modifying a program that defines the display operation of the programmable display 2 and the control operation of the PC 3. It is connected to the display 2.

The PC 3 has a plurality of input terminals Xi in addition to the interface 30 to which the programmable display 2 is connected.
And output terminals Yi (i = 1, 2, ...). The input terminal Xi of the PC 3 is connected to the sensor 41, the limit switch 42, etc. of the control device 4 which is the target of sequence control. The output terminal Yi is connected to the control device 4
Is connected to the motor 43, the solenoid 44, and the like. P
In addition to this, the C3 has a data register 31 and an internal relay 32 in a predetermined area in the memory.

The PC 3 can simultaneously transmit and receive data to and from the programmable display 2 while executing the control operation for the control device 4. Programmable display 2
Has a memory 22 for storing the display program supplied from the display screen creating apparatus 1, and operates according to this display program. That is, the programmable display 2 transmits / receives data to / from the PC 3, reads the input value of the input terminal Xi, and reads and writes the set value of the output terminal Yi, the data register 31, and the internal relay 32.

The programmable display 2 also displays a message screen 6 shown in FIG. 2 (A) and an operation screen 7 shown in FIG. 2 (B) on the display 20. The operation screen 7 displays a touch switch TSW1, a lamp 72, a meter 73, and the like, which are images of a switch, a lamp, and a meter, which are provided in a conventional operation panel. A touch panel 21 is provided on the surface of the display 20 of the programmable display 2, and the touch panel 21 receives a key input by an operator. The touch switch TSW1 includes a ten-key pad that accepts a numeric input, a main switch that inputs start and stop of the control system, and a compulsory switch that operates only a specific part of the control device 4. As the lamp 72, there is a status indicator lamp or the like for indicating that the operation of the control device 4 is normal or abnormal. As the meter 73,
There is an ammeter or the like for displaying the current value or the like supplied to the control device 4.

FIG. 3 is a block diagram showing the configuration of the display screen creating apparatus. The display screen creating apparatus 1 is a ROM 1
The keyboard 14, the mouse 15, the CRT 16, the FDD 17, and the like are connected to the CPU 11 having the RAM 2 and the RAM 13. The CPU 11 is also connected to the programmable display 2 via the interface 18.
The CPU 11 centrally controls the input / output device according to a program written in the ROM 12 in advance. Data input / output in this control is temporarily stored in the RAM 13.
Programmable display 2 including operation program of PC3
The drawing program used when creating the display program is loaded from the floppy disk loaded in the FDD 17.

This drawing program is provided with a touch switch and a constant activation in addition to the logical switch which is the activation condition of the conventional ladder program. Further, as an output, in addition to the output relay of the conventional ladder program, calculation and transfer, a function of displaying a numerical value or a lamp is provided.
Further, as output contents, in addition to reading / writing data in a memory of a conventional PC and calculating data, functions such as drawing text and graphics on a display and inputting from a touch panel are included.

The numerical display function of this drawing program is a function of displaying the contents of a specific memory area (such as the data register 31) in the PC 3 on the display 20 when the activation condition is High. When instructing the numerical display function, the memory and the display mode of the PC 3 to be read are directly set as input parameters, and the display position and display state on the display 20 are set as graphic input parameters.

The touch switch function is performed by the touch panel 21.
This is a function that handles the state of whether or not a specific area is pressed as a starting condition. When instructing the touch switch function, the operation mode of the momentary or alternate touch switch is set as a direct input parameter, and a specific area on the touch panel 21 is set as a graphic input parameter.

The lamp function displays a logical operation result of a high / low state of a single memory area in the PC 3 or a high / low state of a plurality of memory areas, which is a starting condition, in a specific area of the display 20. It is a function. When instructing the lamp function, the display position on the display 20 is set as a graphic input parameter.

The logic switch function is a function that handles the logic value of the memory in the PC 3 as the high / low state of the start condition. When instructing the logical switch function, the memory area of the PC 3 to be read is directly set as an input parameter.

The arithmetic function is a function of reading the contents of a specific memory area of the PC 3, performing four arithmetic operations, logical operations or comparison operations, and storing the operation result in the memory area of the PC 3. When instructing the calculation function, the memory area to be read / written and the calculation type are directly set as input parameters.

The transfer function is a function of storing the value of a specific memory area in the PC 3 in another memory area. When instructing the transfer function, the memory area to be read / written is directly set as the input parameter.

The constant activation function is a function for keeping the activation condition always in the high state.

FIG. 4 is a flow chart showing the processing procedure of the display screen creating apparatus. CPU11 is FDD1
PC3 by the ladder program according to the drawing program read from the floppy disk loaded in 7.
The operation program and the display program of the programmable display 2 are created. In this creation process, the CPU 11 first sets the ladder screen 71 on the CRT 16.
(See FIG. 5A) is displayed together with the input parameter setting screen 72 (s1). The ladder screen 71 is a screen for displaying the ladder program being created. Setting screen 72
Is a screen displaying the setting contents of the direct input parameter and the graphic input parameter. Then C
PU11 receives the instruction | indication of the element which comprises a ladder program (s2). The CPU 11 determines whether the designated element includes a graphic input parameter (s3).

When the function including the graphic input parameter such as the touch switch TSW is instructed, the setting of the direct input parameter and the setting of the graphic input parameter are accepted (s4, s5). After this, CPU1
As shown in FIG. 5B, 1 displays a symbol of the function of the programmable display 2 at the designated position on the ladder screen 71, and sets the display state of the function on the programmable display 2 on the setting screen 72. Display on (s
6).

On the other hand, when the device such as the input terminal X1 or the function not including the graphic input parameter such as the arithmetic processing is instructed, the CPU 11 directly accepts the setting of the input parameter on the setting screen 72 (s7),
Symbols such as the input terminal X1 of the PC 3 are displayed at the designated position on the ladder screen 71 (s8). The CPU 11 continuously executes the processing of s2 to s8 described above until the program creation is completed. By the above processing, for example, a PC
When the output terminal Y1 of the PC3 is turned on with the logical product of the logical sum of the input terminal X1 and the input terminal X2 of No. 3 and the operation of the touch switch TSW1 of the programmable display 2 as the start condition, the CRT16 of the display screen creating apparatus 1 The ladder screen 71 is displayed as shown in FIG.

As described above, since the input terminals X1 and X2 which are the devices of the PC3 and the touch switch TSW1 which is the device of the programmable display 2 are displayed in the same ladder program, the operation of the PC3 by the conventional ladder program is performed. A user who is familiar with creating a program can easily create a display program for the programmable display device 2 by the same procedure. Further, the display program of the programmable display 2 and the operation program of the PC 3 can be created by a single device and a single application software, and the efficiency of equipment and labor can be improved.

Further, when the control device has an abnormality, the PC
Conventionally, when switching the display screen of the programmable display device 2 to the abnormal display screen for displaying the contents of the abnormality by the command from 3, the operation program for detecting the abnormal state is
It was stored in PC3. In an embodiment of the present invention,
An operation program for detecting an abnormal state can be created in the display program of each display screen supplied to the programmable display 2. It should be noted that the size increase of the program by adding the operation program for detecting the abnormal state to all the display programs of the plurality of display screens is caused by creating the operation program for detecting the abnormal state in a common program (see FIG. 6) described later. Can be improved.

Further, the programmable display 2 has a PC 3
When displaying the total of the two data registers of the above, the operation program of the PC 3 for the arithmetic processing and the processing of storing the arithmetic result in another data register is displayed on the same ladder program as the display program that supplies the programmable display 2. Can be created in.

As described above, the operation program of the PC 3 which is functionally related to the display program of the programmable display 2 is created on the same ladder program as the display program using a single device. This makes it extremely easy to create a program.

Further, with respect to the display program of the programmable display unit 2 and the operation program of the PC 3 in which program errors influence each other due to the above-mentioned functional relationships, a single ladder program is used. Debug processing can be performed using the above device, and the debugging work becomes extremely easy.

FIG. 6 is a memory map of essential parts in the memory of the programmable display. The display program supplied from the display screen creation apparatus 1 to the programmable display device 2 is divided into individual programs 81a to 81n for each of a plurality of display screens in the programmable display device 2. Further, a display program common to all of the plurality of display screens, for example, a common part such as a date display part and a screen switching key is independently stored as a common program 82. The common program 82 is composed of a display program 82a for displaying the screen of the common part on the display 20 of the programmable display 2 and an operation program 82b of the PC 3. The individual program 81a and the common program 82 are executed when the screen 1 is displayed, and the individual program 8 is executed when the screen 2 is displayed.
1b and the common program 82 are executed.

As described above, by including the operation program 82b of the PC3 in the common program 82 executed together with all the individual programs, it is not necessary to provide each of the plurality of individual programs 81a to 81n with the operation program of the PC3, and the display is performed. The data amount of the program can be reduced and the memory capacity does not increase.

[0037]

According to the invention described in claim 1, by displaying the symbols of the programmable display together with the symbols of the PC in a single ladder program, the operation program of the PC which is functionally closely related and It is possible to execute the creation work and debug work of the display program of the programmable display by the ladder program that the designer is familiar with, using the same concept and the same program using a single device, and designing the control system. Work and program creation work can be performed extremely easily.

In the invention described in claim 2, a PC
By including the operation program of the above in the display program of the common part, it is not necessary to include the operation program of the PC in all of the display programs corresponding to each of the plurality of display screens. You can prevent the increase.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a system to which a display screen creation device for a programmable display according to an embodiment of the present invention is applied.

FIG. 2 is a diagram showing a display screen of the programmable display.

FIG. 3 is a block diagram showing a configuration of the display screen creation device.

FIG. 4 is a flowchart showing a processing procedure of the display screen creating apparatus.

FIG. 5 is a diagram showing a display state at the time of creating a drawing program of the display screen creating apparatus.

FIG. 6 is a memory map of a main part in the memory of the programmable display.

FIG. 7 is a diagram showing a display program supplied to a conventional programmable display and a general ladder program.

[Explanation of symbols]

 1-Display screen creation device 2-Programmable display 3-PC 4-Control device 5-Control system 16-CRT 20-Display 21-Touch panel

Claims (2)

[Claims] 1. A display screen creating apparatus for creating a display program to be supplied to a programmable display connected to a programmable controller, the program display displaying a symbol of the programmable display together with a symbol of the programmable controller in a single ladder program. An apparatus for creating a display screen of a programmable display, characterized by comprising means. 2. A display program of a common part common to all of a plurality of display screens, including a program for operating a programmable controller, and a display program of a part excluding the common part of each of the plurality of display screens. 2. A display screen creation device for a programmable display device according to claim 1, which is configured by: