JP3512658B2 - Industrial control device programming method and programming system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programming method and a programming system capable of modifying a specific portion of a program for operating an industrial control device even by a person having no specialized knowledge of programming. .

[0002]

2. Description of the Related Art An industrial control device called a programmable logic controller (hereinafter referred to as a PLC) or the like has a hardware portion mainly including a CPU and a memory in order to realize various controls such as sequence control. , And the software part that controls it. The software portion includes designing a sequence control circuit for operating the PLC according to the control system at the time of designing, converting the control circuit into an instruction word, writing the instruction word into a memory, and the like. Generally, this series of operations is called programming.

In such programming, a unique language is used so that a program can be easily created without having specialized knowledge of a computer, and various programming languages which are easy for users to use are successively developed. It became so. Currently, IEC (International Elect
The rotechnical Commission has established a standard programming language (IEC 6 1131-3). It is SFC (Sequential Function Chart), LDR (Lad
der Diagram), IL (Instruction List), FBD (Funct
Ion Block Diagram) and ST (Structured Text) 5
Is the language.

As a programming tool used in programming work, a program loader capable of programming with dedicated instructions (mnemonic symbols) has been the mainstream, but recently, programming software (ladder editor, etc.) has become popular. Since this software can create a ladder diagram or the like in a form including a symbol in a personal computer, the program can be easily created and edited.

In particular, the function block (FB) defined by IEC 6 1131-3 is effective if this function is effectively used so that the user can define his / her own function and make the function block software by himself. It becomes a kind of object.

[0006]

However, the above-mentioned FB
In the above, although the user can freely write the program, when changing the control circuit, it is necessary to make adjustments on site, and it is necessary to modify the program on site. However, when the site is in a remote place, the person in charge of programming cannot go to the site each time, so the worker at the site must correct it. Moreover, on-site workers often do not have the above knowledge of programming languages, and cannot easily change programs.

The present invention has been made in view of the above circumstances, and a general worker who has no knowledge of a programming language or who has some education about the programming language can easily change the control circuit. The purpose of the present invention is to provide a programming method and a system therefor.

[0008]

According to a first aspect of the present invention, there is provided a method for programming an industrial control device, comprising a program for controlling the operation of an input / output device connected to the industrial control device. In the programming method to be created, in order to solve the above problems, a program creating means is provided.
Symbols corresponding to specific input / output devices in the program created by
The association with parts which correspond to the symbols on the screen related to the operation of the input and output devices, is characterized by displaying the program change field for changing the program relating to the symbols on the screen.

In the above method, the symbols in the program such as the ladder diagram are associated with the parts on the screen, and then the program is changed in the program change column called on the screen. This allows
On the visualized control screen, the program can be changed using the optimum programming environment without being aware of the ladder diagram. Also, by specifying the range in which the program can be changed, it is possible to set the minimum necessary change points by providing the program change column only in the part where the designer determines that the program may be changed. .

In the programming method of claim 1, as described in claim 2, it is preferable that the program change column represents the output result for the input condition in the form of a truth table. Since the truth table can be expressed in a simple table format,
Since it has a small amount of data and does not require a large memory capacity, it is an effective means even for an embedded device having a small memory capacity. In addition, since the truth table is simple to set, it makes education much easier than a programming method using a ladder diagram or the like. Therefore, the person in charge of the site can change the program without the need for the designer to go to the site.

The programming method according to claim 1 is
As described in claim 3, in the program change column,
Set a threshold for not accepting erroneous input
Is preferred.

The programming method according to claim 1 is
As described in claim 4, in the program change section,
As a backup file of the changed program
File in the initial state that cannot be rewritten, and the
Prepare the previous file and make a mistake input
If the file is updated by default, enter the password.
Therefore, call the file just before it is changed, and
It is preferable to replace the file with the previous one
Yes.

According to a fifth aspect of the present invention, there is provided a programming system for an industrial control device, comprising: a programming device for creating a program for controlling the operation of an input / output device connected to the industrial control device; In order to solve the above problems, a program creating means for creating the program in a form including a symbol corresponding to an input / output device, a screen creating means for creating a screen related to the operation of the input / output device, and the screen The display means for displaying the screen created by the creating means, the symbol corresponding to the specific input / output device in the program, and the portion corresponding to the symbol in the screen related to the operation of the input / output device are associated with each other, and Display control means for displaying a program change column for changing the program relating to the symbol on the screen It is characterized in that it comprises a.

In this system, a symbol such as a ladder diagram created by the program creating means and a component on the screen created by the screen creating means are associated with each other, and then a program change called on the screen by the display control means is performed. You can change the program in the column. As a result, the program can be changed in the optimum programming environment on the control screen visualized on the display means without being aware of the ladder diagram or the like. Also, by specifying the range in which the program can be changed, it is possible to set the minimum necessary change points by providing the program change column only in the part where the designer determines that the program may be changed. .

As described in claim 6 , it is preferable that the display control means in the programming system of claim 5 represents the output result for the input condition in the program change column in the form of a truth table. The truth table that can be expressed in a simple table format has a small amount of data and does not require a large memory capacity, and is therefore an effective means even for embedded devices with a small memory capacity. Further, by using the truth table whose setting method is simple, the education becomes simple, and as a result, the person in charge of the site can change the program without depending on the designer.

In the programming system of claim 5,
The display control means according to claim 7,
In order not to accept incorrect input in the program change field
It is preferable to set a threshold value.

According to a fifth aspect of the present invention, there is provided a programming system according to the eighth aspect , wherein the program creating means, the screen creating means, the display means, and the display control means are operated by a computer device. It is preferably incorporated in the industrial control device that is configured. The industrial control device configured as described above can function as a so-called open controller that causes a general-purpose computer to operate as a PLC using control software. Therefore, it is possible to easily perform processing such as uploading of the changed program to the program creating means, and it is possible to change the program in a standardized open environment.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] The following will describe one embodiment of the present invention with reference to FIGS. 1 to 5.

In this embodiment, a programming method in a so-called open controller which operates by software will be described.

As shown in FIG. 1, in a computer device 1 such as a personal computer, the PCL function is configured to be realized by software, and the computer device 1 has a common protocol for input / output devices 2. Are connected via an open network 3 using. Examples of the input device include a sensor and a switch, and examples of the output device include an actuator, a relay, a solenoid valve, and a display.

The computer device 1 includes an input unit 11, a display unit 12, an I / O unit (I / O in the figure) 13 and an application unit 14.

The input unit 11 is an input device such as a mouse and a keyboard that can be used to perform various input operations. The display unit 12 is a display device such as a CRT or LCD. The I / O unit 13 is a unit having an interface function connected to the input / output device 2, and a digital signal or an analog signal input / output to / from the input / output device 2 is provided in a CPU (not shown) in the computer device 1. To interact with. Such an I / O unit 13 is usually
It is mounted in the computer device 1 as an I / O board.

The application unit 14 is the CPU described above.
It is a set of software for realizing various functions executed by, and is stored in a storage device such as a hard disk drive (not shown). The application 14 includes a ladder diagram creating unit 14a and a screen creating unit 14b.

The ladder diagram creating section 14a includes programming software called a ladder editor, etc., and is constructed so that it can be created on the display screen 12a of the display section 12, as shown in FIG. In the ladder diagram creating unit 14a, for example, the above-mentioned programming language standardized by IEC is used. IEC 6 1131-
The function of the FB specified in 3 can be freely defined by the software developer, and it can be used like the FB21 described later by the FB alone or by calling from other programming software. it can.

The application section 14 also includes a logic runtime 14c for executing the created program and a screen data runtime 14d for screen data.

The screen creating section 14b is the computer device 1
However, the display unit 12 is provided with a function as a terminal for inputting setting values for various monitors for management such as operating conditions and work instructions of the input / output devices 2 through the display unit 12. It is screen creation software (hereinafter referred to as drawing software) for creating a screen to be displayed on. Generally, as shown in FIG. 3, the drawing software is provided with parts such as a switch, a numeric keypad, a meter display, and a graph display and a drawing function so that a user's own screen can be created. Further, the screen creation unit 14b is the ladder diagram creation unit 14a.
Each device represented by a symbol in the ladder diagram created in step 1 and the corresponding device placed on the created screen will be linked by the drawing software by setting tags and symbols. There is.

The data of the control circuit created by the ladder diagram and the screen data created by the drawing software obtained as a result of such association are stored in a memory unit (not shown) in the computer device 1. Then, when the system is operating, the control program is executed based on these data stored in the memory unit.

When the system is in operation (online state), the computer device 1 functions as a monitor for monitoring the operating condition of the system by displaying the created screen and the state of the site on the display unit 12, and at the same time Controls the deployed input / output devices 2 ... The computer device 1 also functions as a programming tool for programming the control circuit and creating a screen in the edit mode when the system is not in operation (offline state).

The image creating unit 14b is configured to display a program created by the user in the FB 21 as a property 25 as shown in FIG. 4 so that the program can be changed in association with the screen created by the drawing software. Has been done. To call this property 25 on the screen,
The selection is made by clicking the edit button (Edit) provided in one corner of the screen shown in FIG. 3, but the selection may be made from the menu bar or the like. In this way, the operation of calling the property 25 is performed by the image creating unit 1.
4b is pre-installed so that it can be easily called, so that even a person who is not familiar with computer technology can easily operate it.

In the example shown in FIG. 4, input conditions (input device)
And the output result (output device) setting
It is designed to be input in the form of, and the input is performed by clicking the mouse. For example, in the initial state, the pump operates when the ON switch is turned ON in the ladder diagram shown in FIG.
In the truth table 26, the ON switch and the pump are set to “1” correspondingly. When the FB21 of the pump is provided in the ladder diagram, when the person approaches the pump within a certain range (the range indicated by the alternate long and short dash line in FIG. 3) so that the person does not cause an accident, If you want to place a limit switch around the pump for the purpose of stopping, provide LS (limit switch) in the condition column, and if you want the pump to stop when the limit switch turns on, set LS and pump respectively. Set to "1" and "0".

As described above, a new element can be added to the truth table 26, and the operation can be set for that element. Other examples of adding elements are:
When it is desired to change the sensitivity of a sensor due to a change in the type of product flowing through the manufacturing line, it is possible to add a sensor or set a timer.

Further, in the truth table 26, the setting of the timer can be changed. For example, there is time management of stopper control in a belt conveyor that conveys products and the like.

For example, in the stopper control as shown in FIG. 5, when the work 26 on the conveyor 24a enters the inspection device 29, the optical sensor 27 is turned on and the conveyors 24a.
The stopper 25 provided between 4b rises (ON). When the inspection in the inspection device 29 is completed, the work completion switch 30 is turned on, and the completion of the work is output as a signal. When this signal is input to this system, the stopper 25 is lowered (OFF). Further, when the work 26 moves from the conveyor 24a to the conveyor 24b to turn on the optical sensor 28, the stopper 25 moves up.

Such stopper control is performed by, for example, FIG.
By providing a function block (FB) 31 in a ladder diagram such as shown in Fig. 3, it is possible to easily change the settings on site. Then, a truth table 32 for stopper control as shown in FIG. 7 is associated with the FB 31 by a property. In the truth table 32, the sequence of the above-mentioned operation is in the order of step numbers (1 to
7).

Incidentally, A to D in the above ladder diagram are
It represents an arbitrary input / output device such as a switch or a lamp.

An example of the case where a timer is required for such stopper control will be described.

For example, when the optical sensor 28 raises the stopper 25 by detecting the work 26, it is assumed that the optical sensor 28 fails and there is no substitute for it.

In order to eliminate such an inconvenience, the stopper 25 may be temporarily lowered and then raised after a predetermined time set by the timer. For this reason,
As shown in FIG. 8, in the above truth table 32, "TIM (1) UP" is set in the condition column and "TIM (1) 15S" is set in the output column. In this example, when the first timer times out after 15 S (seconds), the timer is turned off and the stopper 25 is raised (turned on). The set time of the timer may be S (second), M (minute), H (hour) and ms (millisecond). The timer can be set by giving the editor a fixed function as an instruction. Furthermore, up to n timers can be provided which can be supported by the memory. In this case, the truth table 32
“TIM (1) to TIM (n)” can be set.

Such a change is made by exiting the operating state (online state) of the system, selecting the edit mode in the offline state, and calling the control screen corresponding to the FB 21 in this edit mode. When the setting of the truth table 26 is added or changed, the data of the ladder editor is updated by uploading. Specifically, since the data held by the ladder editor (modified) is different from the data held by the logic runtime 14c (unmodified), the data of the logic runtime 14c is exchanged with the data of the ladder editor. It

When the program is changed using the truth table 26/32, there is a possibility that an erroneous input (inconsistent input or unsettable input) may be made. Therefore, the image creation unit 1
A threshold value that is not recognized at the site is set in 4b, and it is possible not to accept such inconvenient input. Further, when such an input is made, a warning is displayed on the control screen. Furthermore, regarding the program in FB21 ・ 31,
As a backup file, an unrewritable initial file and a file just before the change are prepared. If the file is updated with incorrect input, the file immediately before being changed by inputting the password is called, and the latest file is replaced with the previous file.

In the FBs 21 and 31, the ladder editor or the compiler provided in the control runtime automatically operates to convert the program and create a file that is made into a subroutine. And logic runtime 1
4c reads the instruction immediately before FB21 ・ 31, and if FB21 ・ 31 is described next, FB21 ・ 31
Then, the process proceeds to the subroutine of. Therefore, the program can be modified only by rewriting the contents of the above file in the truth table 26/32.

In the above example, the FBs 21 and 31 are rewritten by the truth table 26 and 32, but other methods such as C language, BASIC, and ladder diagram can be rewritten. May be performed. In the case of C language, the ladder editor needs to have a compiler for C language, and in the case of BASIC, the ladder editor needs to have an interpreter or compiler for BASIC. Further, when the ladder diagram is used, knowledge for creating the ladder diagram is required as described above, and the same applies to other languages. Further, in the case of the ladder diagram, the program becomes large and thus requires a large memory capacity.

On the other hand, since the truth table 26/32 has a small amount of data, it does not require a large memory capacity.
Further, since the truth table 26/32 has a simple operation and setting method, it makes education much easier than a programming method using a ladder diagram or the like. Therefore, the conditions that can be set in the truth value tables 26 and 32 are AND and OR.
And it is preferable to limit the number to the timer.

As described above, in the programming method according to the present embodiment, the symbols in the ladder diagram and the parts on the control screen are associated with each other, and the program in the FB 21 is called on the control screen with the property 25. Conditions and outputs are changed in the truth table 26. As a result, it is possible to provide an object-oriented programming method, and it is possible to change the program on the visualized control screen without being aware of the ladder diagram and without requiring specialized programming knowledge. it can. As a result, the person in charge of the site can change the program without the need for the designer to go to the site.

The present invention is not limited to the ladder diagram,
Needless to say, the present invention can be applied to programming in other languages including the five languages defined by IEC 61131-3 mentioned above.

Further, by limiting the range in which the program can be changed to FB21 (31), the property 25 is provided only in the portion where the designer judges that the program may be changed, and the minimum necessary change is made. The location can be set and the maintenance of the program can be facilitated. Further, when the property 25 is newly required due to a request from the person in charge at the site, the designer may provide the new FB 21 in the ladder diagram and set the property 25 in it.

Further, in this embodiment, since the programming method is implemented by the open controller, the FB 21 uses a programming language or a table format that is standardized by IEC and is open. You can Therefore, editing in the property 25 becomes easy.

Further, in the present embodiment, the screen creating section 1
4b (drawing software) has a function of associating the screen with the ladder diagram and a function of displaying the truth table 26 by the property 25. Therefore, the drawing software is installed in the computer device 1 and the ladder diagram creating unit 14 is already installed.
The above programming method can be easily realized by combining with the ladder editor of a.

In the present embodiment, the function block and the truth table are associated with each other by properties, but other methods may be used for this association. This also applies to the other embodiments described below. [Second Embodiment] The following will describe another embodiment of the present invention in reference to Figs. 4 and 9. In the present embodiment, constituent elements having the same functions as those of the constituent elements in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment mode, a programming method in a display device having a PLC function will be described.

As shown in FIG. 9, the programmable display 4 as the above-mentioned display includes a CPU 41 and a memory section 4.
2, maintenance port 43, input unit 44, display unit 45
And an I / O unit (I / O in the figure) 46.

The CPU 41 controls the operation of each section of the programmable display 1 according to the system program stored in the memory section 42. The CPU 41 is
Similarly, according to the control program (user program) stored in the memory unit 42, the data input from the input / output device 2 via the I / O unit 46 is changed so that the programmable display 4 operates as a PLC. Based on this, arithmetic processing of control data given to the input / output device 2 is performed. The memory unit 42 includes a ROM for storing the above system program, a user memory (image memory) for storing screen data to be described later, a flash memory for storing the control program, and a unit for storing an operating system. There is.

The maintenance port 43 is a communication port for communicating with a personal computer (hereinafter referred to as a personal computer) 5. The input unit 44 is configured by an input device such as a touch panel for inputting on the display screen of the display unit 45. For this reason, the display unit 45 is configured by a flat panel display element such as a liquid crystal panel or an EL panel.

The I / O section 46 is a section having an interface function connected to the input / output device 2, and exchanges digital signals or analog signals input / output with the input / output device 2 with the CPU 41. It has become.

On the other hand, the personal computer 5 has an application section 14 including a ladder diagram creating section 14a and a screen creating section 14b, like the personal computer in the first embodiment (see FIG. 1) except for the I / O section 13. I have it. Therefore, the personal computer 5 functions as a programming tool for creating a ladder diagram and a control screen.

The personal computer 5 is provided with an interface section (I / F in the figure) 51, and data is transferred from the interface section 51 to the programmable display 4 via the transfer cable 6. Has become. Specifically, the ladder diagram data (control program) created by the ladder diagram creation unit 14a and the screen data created by the screen creation unit 14b are transferred via the transfer cable 6 and stored in the memory of the programmable display 4. Downloaded to section 42. Further, the function of calling the property 25 shown in FIG. 4 and the function of changing the setting in the truth table 26 of the property 25 are also downloaded to the memory unit 42.

Therefore, in the programmable display 4 as well, the truth table 26 is called by calling the property 25 as is the case with the computer 1 in the first embodiment.
You can change the settings of. However, since the programmable display 4 is configured to input on the display screen of the display unit 45 via the input unit 44 (touch panel or the like), it can be edited by touching a predetermined portion on the display screen. Switch to mode, property 2
5 is displayed.

When the setting of the truth table 26 is added or changed, the data of the ladder editor or the like is updated by uploading the application section 14 of the personal computer 5.

In this embodiment, the programmable display 4 is used.
Since the truth value table 26 having a small amount of data is displayed in (1), it is generally suitable for the programmable display 4 having a small memory capacity. [Embodiment 3] FIG. 4 and FIG. 1 regarding still another embodiment of the present invention.
It will be described below based on 0. In the present embodiment, constituent elements having the same functions as those of the constituent elements in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, a programming method in a configuration using a stand-alone PLC will be described.

As shown in FIG. 10, the PLC 7 is a CPU
A power supply module 7a and an I / O module 7b are provided. The CPU / power supply module 7a includes a CPU unit including a CPU and a memory, and a power supply unit that supplies electric power to the PLC 7. The CPU unit performs arithmetic processing of control data given to the input / output device 2 based on the data input from the input / output device 2 via the I / O unit module 7b according to the control program. I / O module 7b
Is a portion having an interface function connected to the input / output device 2, and is adapted to exchange a digital signal or an analog signal input / output with the input / output device 2 with the CPU section.

On the other hand, the personal computer 8 is the same as the personal computer (see FIG. 1) in the first embodiment except the I / O unit 13, and the ladder diagram creating unit 14a, the screen creating unit 14b, the logic runtime 14c and the screen data. Runtime 14d
An application unit 14 including (the illustration of 14c and 14d is omitted) is provided. Therefore, PC 5
Functions as a monitor that monitors the operating status of the system by displaying the created screen and the state of the site on the display unit 12. The personal computer 8 also functions as a programming tool for programming the control circuit and creating a screen in the edit mode when the system is not operating.

This personal computer 8 is provided with an interface section (I / F in the figure) 81, and between the interface section 81 and the CPU / power supply module 7a via the communication cable 9 (eg RS-232C). It is designed to transfer data. Specifically, the data (control program) of the ladder diagram created by the ladder diagram creation unit 14a is transferred via the communication cable 9 after being compiled and downloaded to the memory of the CPU / power supply module 7a.

Therefore, in the personal computer 8, the setting of the truth table 26 can be changed by calling the property 25, as in the computer device 1 in the first embodiment. However, when the setting of the truth table 26 is added or changed, it is necessary to compile the changed program and download it to the PLC 7. At this time as well, similar to the computer device 1, the data of the ladder editor is updated by uploading to the ladder diagram creation unit 14a.

Further, the display form in the property 25 must be a form that can be expanded as a ladder diagram so that the program change can be understood by the PLC 7 as a ladder diagram. Therefore, as shown in the truth table 26, AN
It is preferable to use an instruction word such as D or OR that can be easily expanded to a ladder diagram.

Further, when the PLC 7 is used, it is not clear where in the PLC 7 the data of the truth table 26 should be transferred. Therefore, in this case, it is necessary to open the configuration for receiving the above data by communication and replacing the original data on the PLC 7 side.

As described above, according to the present embodiment, the programming method of the present invention can be applied to a conventional system including a general PLC.

[0068]

As described above, the programming method for the industrial control device according to the first aspect of the present invention is a program creation method.
The symbol corresponding to a specific input / output device in the program created by
It is configured to associate a portion corresponding to the symbol on the created screen related to the operation of the input / output device and display a program change field for changing the program related to the symbol on the screen.

As a result, on the visualized control screen,
The program can be changed using the optimum programming environment without being aware of the ladder diagram. Also, by specifying the range in which the program can be changed, it is possible to set the minimum necessary change points by providing the program change column only in the part where the designer determines that the program may be changed. . Therefore, the degree of freedom in changing the program can be improved, and the maintenance of the program can be facilitated.

According to a second aspect of the present invention, there is provided a method of programming an industrial control device according to the first aspect of the present invention, wherein the program change column represents an output result corresponding to an input condition in the form of a truth table. .

As a result, a large memory capacity is not required for the truth table having a small amount of data. Further, since it is easy to learn a truth table whose setting method is simple, it becomes possible for a person in charge of the site to change the program without the designer having to go to the site. Therefore, it is possible to further facilitate the maintenance management of the program and the memory management.

The industrial control device according to claim 3 of the present invention
The programming method is a programming method according to claim 1.
Error in the above program change field
Set a threshold for not accepting .

An industrial control device according to claim 4 of the present invention
The programming method is a programming method according to claim 1.
Method, change in the program change column above.
Rewrite as a backup file of the created program
Unreadable file in the initial state and the previous file before the change.
File and prepare a file with incorrect input.
If the password is updated, change it by entering the password
The file just before is called and the latest file is
Replace with the previous file.

According to a fifth aspect of the present invention, there is provided a programming system for an industrial control device, wherein a program for controlling an operation of an input / output device connected to the industrial control device is a program and a symbol corresponding to the input / output device is used. Including a program creating means for creating a screen, a screen creating means for creating a screen related to the operation of the input / output device, a display means for displaying the screen created by the screen creating means, and a specific input in the program. Display control for associating a symbol corresponding to an output device with a portion corresponding to the symbol on a screen related to the operation of the input / output device, and displaying a program change column for changing the program related to the symbol on the screen And a means.

Thus, the program can be changed in the optimum programming environment without paying attention to the ladder diagram on the control screen visualized on the display means. Also, by specifying the range in which the program can be changed, it is possible to set the minimum necessary change points by providing the program change column only in the part where the designer determines that the program may be changed. . Therefore, similar to the programming method according to the first aspect, there is an effect that the degree of freedom of changing the program can be improved and the maintenance and management of the program can be facilitated.

According to a sixth aspect of the present invention, there is provided a programming system for an industrial control device according to the fifth aspect , wherein the display control means outputs an output result corresponding to an input condition in the program change column as a truth table. It is a configuration expressed in the form of.

As a result, a large memory capacity is not required for the truth table having a small amount of data. Further, since it is easy to learn a truth table whose setting method is simple, it becomes possible for a person in charge of the site to change the program without the designer having to go to the site. Therefore, like the programming system according to the second aspect, it is possible to further facilitate the maintenance management of the program and the memory management.

An industrial control device according to claim 7 of the present invention
The programming system is a program according to claim 5.
In the programming system, the display control means is
This is to prevent incorrect input in the program change field.
This is a configuration for setting a threshold value.

An industrial control device programming system according to claim 8 of the present invention is the programming system according to claim 5, 6 or 7 , wherein the program creating means, the screen creating means and the display means are provided. The display control means is incorporated in the industrial control device configured by a computer device.

As a result, the industrial control device can function as a so-called open controller that causes the general-purpose computer to operate as a PLC by the control software. Therefore, it is possible to easily perform processing such as uploading of the changed program to the program creating means, and it is possible to change the program in a standardized open environment. Therefore, it is possible to easily realize the centralized management centered on the computer device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a programming system according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which a ladder diagram created by a ladder diagram creating unit is displayed on a display screen of a display unit in the above programming system.

FIG. 3 is an explanatory diagram showing a state in which a control screen created by drawing software is displayed on the display screen of the display unit in the programming system.

FIG. 4 is an explanatory diagram showing properties displayed on the control screen.

FIG. 5 is an explanatory diagram showing an example of stopper control in which the timer setting can be changed using the above properties.

6 is an explanatory diagram showing a ladder diagram including the stopper control of FIG. 5, which is made into a function block.

FIG. 7 is an explanatory diagram showing a truth table corresponding to a function block for stopper control in FIG.

FIG. 8 is an explanatory diagram showing a truth table when setting a timer for the stopper control.

FIG. 9 is a block diagram showing a configuration of a programming system according to a second embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a programming system according to a third embodiment of the present invention.

[Explanation of symbols]

1 computer device 2 input / output device 5 personal computer 8 personal computer 12 display unit (display unit) 14a ladder diagram creation unit (program creation unit) 14b screen creation unit (screen creation unit, display control unit) 21 31 FB 25 property (program change) Column) 26 Truth Table 45 Display (display means)

Claims (8)

(57) [Claims] 1. In a programming method for creating a program for controlling the operation of an input / output device connected to an industrial control device, a symbol corresponding to a specific input / output device in the program created by the program creating means. , Screen creation
Characterized in that a program change section for changing a program relating to the symbol is displayed on the screen by associating with a portion corresponding to the symbol on the screen related to the operation of the input / output device created by the means. Industrial control device programming method. 2. The programming method for an industrial control device according to claim 1, wherein the program change column represents an output result corresponding to an input condition in the form of a truth table. 3. An erroneous input in the program change field is accepted.
Characterized by setting a threshold to prevent sticking
A method for programming the industrial control device according to claim 1.
Law. 4. The program is changed in the program change column
Do not rewrite as a backup file of the program.
Possible initial state file and previous file before change
And prepare the file with the incorrect input
If it is updated, it will be changed by entering the password.
The file immediately before
The file according to claim 1, which is replaced with the file of
Method for programming industrial control devices listed above. 5. An input / output device connected to an industrial control device
Program that creates programs to control movements
In the programming system, the program includes symbols corresponding to input / output devices.
Screen work to create a program creation means for creating a form, the screen associated with the operation of the input-output devices
And a table that displays the screen created by the screen creating means.
Means and the system corresponding to the specific input / output device in the above program.
And the screens related to the operation of the above input / output devices.
Associated with the part corresponding to the symbol
To change the program for the above symbol
With display control means for displaying the program change column
A programming system for industrial control devices that is characterized by: 6. The display control means changes the program.
The output result for the input condition in the column is in the form of truth table
The industrial system according to claim 5, characterized in that
Your device programming system. 7. The display control means changes the program.
Set a threshold to prevent incorrect input in the field
The industrial control device according to claim 5, wherein
Programming system. 8. The program creating means and the screen creating
Means, the display means, and the display control means are
Built into the above-mentioned industrial control device composed of a computer device.
Incorporated into claim 5, 6 or 7
A programming system for an industrial control device according to.