JP2003058210A - Multiple output elimination method in sequence program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple output elimination method in a sequence program capable of easily dissolving a multiple output state in a short time by outputting multiple output information and reporting to a programmer in the case that the multiple output state is present at the time of preparing the sequence program and to provide the multiple output elimination method in the sequence program capable of securing safety by inhibiting operations of an industrial machine by the sequence program in which multiple outputs are present unless the multiple output state present in sequence program data is dissolved while achieving the above-mentioned purpose. SOLUTION: The sequence program is prepared by inputting an input condition and an output condition corresponding to it for each operation step of the industrial machine. When the multiple output of repeatedly outputting an output member is inputted for different input conditions at the time of editing the sequence program, multiple output alarm information is outputted, the multiple output is alarmed to the programmer and continuation of an editing processing is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for eliminating multiple outputs in a sequence program which has an input condition and an output condition corresponding to each operation step in order to operate various industrial machines in a predetermined manner.

[0002]

In order to sequence-control various industrial machines, a programmable controller (hereinafter referred to as PC) is used to create a sequence program, and then the industrial machine is operated in a predetermined manner based on the sequence program. There is.

In order to create a sequence program using this PC, the programmer responds to the input conditions from various sensors (detectors) provided in the industrial machine and the input conditions for each sequence (step). Then, output conditions for operating various output members such as a relay, a motor, and a valve are created in a programming language such as a ladder programming language.

When creating this sequence program, normally, the program data is created so that one output condition is executed in response to a predetermined input condition at each step. In order to execute one output condition redundantly based on different input conditions due to an input error, the so-called multiple output, that is, the state in which the connection command is output to the device associated with the input / output part of the industrial machine in duplicate. It may exist.

[0005] Such multiple outputs must not exist by nature because they cannot operate in a malfunction or a normal state when operating an industrial machine. For this reason,
If multiple outputs exist, all editing of the sequence program and saving to the industrial machine control unit are prohibited until the multiple output state in the sequence program is resolved, and the industrial machine according to the sequence program in which multiple output states exist Control is prohibited.

In order to eliminate the multiple output state in the sequence program, the programmer must delete it by editing the sequence program. However, since the location where the multiple output state exists in the sequence program is unknown, it is necessary to check all program data and confirm the location where the multiple output exists, and this correction work requires a lot of time and effort. , The sequence program creation efficiency was extremely poor.

The present invention has been invented to solve the above-mentioned conventional drawbacks, and its object is to output multiple output information when a multiple output state exists when a sequence program is created. Accordingly, it is an object of the present invention to provide a multiple output eliminating method in a sequence program, which can notify the programmer of the multiple output state easily and in a short time.

Another object of the present invention is to provide a sequence program in which multiple output states exist,
It is an object of the present invention to provide a multiple output elimination method in a sequence program that enables editing and saving of the sequence program and makes the creation work efficient.

Still another object of the present invention is to prevent the operation of the industrial machine by the sequence program having multiple outputs unless the multiple output state existing in the sequence program data is resolved while achieving the above object. It is to provide a method of eliminating multiple outputs in a sequence program that can ensure safety by using a sequence program.

[0010]

SUMMARY OF THE INVENTION According to the present invention, when an input condition and an output condition corresponding to the input condition are input for each operation step of an industrial machine to create a sequence program, the sequence program has different input conditions. When multiple outputs that cause the output members to be redundantly output are input, multiple output warning information is output to warn the program creator of the multiple outputs and the editing process can be continued.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the PC 1 includes a man-machine interface unit for creating a sequence program,
It consists of a process interface part that operates the industrial machine according to the created sequence program.
The present invention is mainly applied to the man-machine interface section.

The PC 1 is a known one, and includes a CPU 3, a program memory 5, a data memory 7, a control data memory 8,
The timer 9 includes an input unit 11, an output unit 13, a setting unit 15, and the like.

Among them, the program memory 5 stores system program data for executing a support process for creating a sequence program and correcting and eliminating multiple outputs according to the present invention. The data memory 7 has a work area 7a and a multiple output list area 7b for storing multiple output list information when the created sequence program has multiple outputs.

The control data memory 8 stores the execution module data of the sequence program transferred from the work area 7a in order to control the sequence of the industrial machine. The setting unit 15 includes a keyboard and switches for inputting various input conditions and output conditions when creating a sequence program, a display device for displaying input input conditions and output conditions, a printer for printing display data, and the like. Composed of programming tools.

The input unit 11 causes the CPU 3 to input the input condition and the output condition input by the setting unit 15 and the signals from various sensors provided in the industrial machine. Further, the output unit 13 outputs various data stored in the data memory 7 to a display device or the like, and outputs execution module data of the sequence program stored in the control data memory 8 to each output member of the industrial machine.

A method of creating a sequence program using the PC 1 described above is publicly known, and the details thereof are omitted. A method of correcting when multiple outputs exist when creating and editing a sequence program by a ladder program will be described below. explain.

As shown in FIG. 2, the programmer inputs, for each operation (step) of the industrial machine, input conditions such as signals from various detectors and timer signals necessary for operating the industrial machine in a predetermined manner. Output conditions relating to output members (hereinafter referred to as modules) such as motors, relays and solenoids that operate based on the input conditions are created and edited in a ladder program format.

During the above-described ladder program creation / editing process, after inputting multiple outputs for overlapping operation of output members under different input conditions as shown in FIG. 3, input data as shown in FIG. When the conversion key for confirming is input, it is searched whether or not multiple outputs exist in the ladder program whose input has been confirmed. The search for multiple outputs in the ladder program is performed each time the conversion key is operated to confirm the input data.

Now, when multiple outputs exist in the confirmed ladder program, the multiple output warning message is displayed on the display device after the editing process is temporarily interrupted as shown in FIG. Warn that it exists.

When the ladder program is to be edited even though there are multiple outputs in the ladder program, click the "OK" button in the multiple output warning message dialog shown in FIG. As shown in 6, edit processing of the ladder program is enabled.

In order to correct and eliminate the multiple output in the ladder program during the subsequent edit processing, move the pointer or cursor to the multiple output location, input the correct output condition later, and then operate the conversion key again. To confirm the input and correct it. Also in this case, it is searched whether multiple outputs exist in the ladder program when the conversion key is operated.

When the editing process is terminated in the state where multiple outputs exist in the ladder program, if "close file" is selected by the pointer or cursor as shown in FIG. 7, the display device as shown in FIG. Display a confirmation message asking whether to finish editing the ladder program.

When the "OK" button in the confirmation message shown in FIG. 8 is clicked to end the editing process, the process shown in FIG.
As shown in, a confirmation message for confirming whether or not to save the edited ladder program in the work area 7a is displayed on the display device.

Now, in order to save the ladder program edited by the end of the editing process, "O" in the confirmation message is displayed.
When the "K" button is clicked, the save process is executed and the multiple outputs in the ladder program are searched during the save process. If multiple outputs exist, the multiple output warning message is displayed on the display device as shown in FIG. Is displayed.

In order to save the edited ladder program in the work area 7a and terminate the processing despite the existence of multiple outputs, "OK" in the multiple output warning message shown in FIG.
Click the button or the "Cancel" button to abort the save process and return to the edit process to eliminate multiple outputs in the ladder program.

Now, when the "OK" button is clicked to continue the saving process of the ladder program having multiple outputs, the multiple outputs existing in the ladder program retrieved on the display device as shown in FIG. Display the list of.

As the multiple output list information, as shown in FIG. Information on the name of the module having multiple outputs and the number of detected multiple outputs, b. If there is information about the name of the module related to multiple output, or if there are multiple module names related to multiple output, click the pull-down button in the display window to display the module related to multiple output and select the module name from them. To display multiple output information. c. In the detailed information of the selected multiple output, a serial number indicating the order of appearance of the multiple output, an abnormal step that is the relative row number with the start row of the search source module of the multiple output being 1 Module name, duplicate step, which is the relative number of rows where the starting line in the multiple output search target module is 1, multiple output search instruction, device file name in which multiple output search device is stored, multiple output search device Address and search device name for multiple output.

To save the multiple output list information displayed on the display device, click the "Save" button in the multiple output list screen shown in FIG. 11, and the multiple output list information will be displayed on the display device as shown in FIG. A message for confirming the storage destination of the output list and the file name is displayed, and the multiple output list is stored by clicking the "OK" button on the screen.

To print the multiple output list, click the "Print" button in the multiple output list screen shown in FIG. 11 to display a print confirmation message on the display device as shown in FIG. When the "OK" button on the screen is clicked, the multiple output list is printed.

After executing the above-mentioned save process or print process, or when the "Cancel" button is clicked, a start screen is displayed on the display device as shown in FIG. 15 and the edit process is terminated.

As described above, when multiple outputs are input during the editing process of the ladder program, or a multiple output warning message is displayed at the end of the editing process, a multiple output exists in the ladder program to the programmer due to an input error. Help to eliminate multiple outputs by warning.

Further, even when the editing process is terminated in the state where the multiple output exists in the ladder program, the multiple output list is displayed together with the above multiple output warning message, and the programmer is instructed in the ladder program due to an input error. Helps eliminate multiple outputs by warning that multiple outputs exist. Also, when displaying the multiple output list, it is possible to easily know where multiple outputs exist at the next editing process by saving or printing the multiple outputs list, and eliminating multiple outputs at the next editing process. To help.

Although the inputting multiple output is assisted during the editing process in the ladder program, the ladder program is saved even when the multiple output exists in the ladder program as described above. be able to. Therefore, it is assumed that the programmer moves the edited ladder program from the man-machine interface to the process interface and operates the industrial machine based on the ladder program having multiple outputs.

However, when multiple outputs exist in the ladder program, the industrial machine cannot be operated in a predetermined manner. Therefore, according to the present invention, when the PC 1 is transferred from the man-machine interface to the process interface, that is, the ladder program stored in the work area 7a is converted into execution module data and the control data memory 8 is used.
Execution module creation processing is provided in the process of transferring to the, and creation of an execution module is prohibited when multiple outputs exist.

That is, when the execution module creation mode for shifting from the man-machine interface to the process interface as shown in FIG. 16 is selected from the menu window in the initial screen shown in FIG. 15, as shown in FIG. Display the execution module creation process dialog on the display device.

When the "Create" button for creating the execution module is clicked on the screen, a confirmation dialog is displayed on the display device as shown in FIG. 18, and when the "OK" button on the screen is clicked. As shown in FIG. 19, an execution module creation process for converting a ladder program into sequence program data for operating an industrial machine is performed, multiple outputs are searched in the creation process, and a progress bar indicating the progress status is displayed on the display device. .

When multiple outputs are detected in the above process, the execution module creation process is interrupted and a multiple output warning message is displayed on the display device as shown in FIG. Then, when the "OK" button in the screen is clicked to continue the warning process, the multiple output list information is displayed on the display device as shown in FIG. The multiple output list information is similar to that shown in FIG. 12, and the multiple output list is saved, printed, or “cancel”.
After the button is clicked and a predetermined process is executed, the screen returns to the initial screen.

When multiple outputs are detected in the execution module creating process for changing the ladder program edited in this way into a sequence program for actually operating the industrial machine in a predetermined manner, the execution module creating process is prohibited,
Program data, including multiple outputs, avoids industrial machines being drive controlled.

In the present embodiment, first, when multiple outputs are input during the editing process of the ladder program and when the edited ladder process is finished and the edited ladder program is saved, the multiple outputs are searched, and when multiple outputs exist. A warning message is displayed to warn the programmer to help eliminate multiple outputs.

In addition, an execution module creation process is provided in the process of transitioning from the man-machine interface to the process interface, and multiple outputs are searched when creating the execution module. It prohibits operating the industrial machine by the sequence program including the output and displays the warning message to support the elimination of multiple outputs.

As a result, it is possible to efficiently create the sequence program necessary for operating the industrial machine in a predetermined manner.

[0042]

According to the present invention, when a multiple output state exists at the time of creating a sequence program, the multiple output information is output to notify the programmer and the multiple output state can be easily eliminated in a short time. To do. Further, even when the sequence program has a multiple output state, the sequence program can be edited and saved, and the creation work can be made efficient. Further, while achieving the above object, the safety of the industrial machine can be secured by prohibiting the operation of the industrial machine by the sequence program having multiple outputs unless the multiple output state existing in the sequence program data is resolved.

[Brief description of drawings]

FIG. 1 is an electrical block diagram of a PC.

FIG. 2 is an explanatory diagram showing an edit screen of a ladder program.

FIG. 3 is an explanatory diagram showing an input screen for multiple output.

FIG. 4 is an explanatory diagram showing an edit screen after inputting multiple outputs.

FIG. 5 is an explanatory diagram showing a multiple output warning message screen during editing processing.

FIG. 6 is an explanatory diagram showing a screen for continuing editing processing after a warning.

FIG. 7 is an explanatory diagram showing an end screen of edit processing.

FIG. 8 is an explanatory diagram showing an edit processing end confirmation screen.

FIG. 9 is an explanatory diagram showing a screen for saving an edited ladder program.

FIG. 10 is an explanatory diagram showing a multiple output warning message screen at the time of saving.

FIG. 11 is an explanatory diagram showing a display screen of a multiple output list.

FIG. 12 is an explanatory diagram showing a detailed screen of a multiple output list.

FIG. 13 is an explanatory diagram showing a screen for saving a multiple output list.

FIG. 14 is an explanatory diagram showing a print screen of a multiple output list.

FIG. 15 is an explanatory diagram showing an initial screen.

FIG. 16 is an explanatory diagram showing an execution module creation selection screen.

FIG. 17 is an explanatory diagram showing an execution module creation screen.

FIG. 18 is an explanatory diagram showing an execution module creation execution confirmation screen.

FIG. 19 is an explanatory diagram showing a progress status screen of execution module creation and multiple output search.

FIG. 20 is an explanatory diagram showing a multiple output warning message screen when an execution module is created.

FIG. 21 is an explanatory diagram showing a multiple output list display screen when an execution module is created.

Claims (8)

[Claims] 1. When an input condition and an output condition corresponding to the input condition are input for each operation step of an industrial machine to create a sequence program, the sequence program is multiplexed to output output members for different input conditions. A method for eliminating multiple outputs in a sequence program, which outputs multiple output warning information when an output is input to warn a program creator of multiple outputs and enables editing processing to continue. 2. The multiple output eliminating method in a sequence program according to claim 1, wherein the multiple output warning information and the multiple output list information are output when a sequence program having multiple outputs is stored. 3. A multiple output eliminating method in a sequence program capable of outputting multiple output list information. 4. A method for eliminating multiple outputs in a sequence program according to claim 3, wherein the multiple output list information can be output as a file. 5. The method for eliminating multiple outputs in a sequence program according to claim 3, wherein the multiple output list information can be printed out. 6. When transferring an edited sequence program to a machine control unit, a multiple output in the transferred sequence program is searched for, and when multiple output exists,
5. The multiple output eliminating method in a sequence program according to claim 3, wherein the multiple output list information of claim 1 can be saved in a file by interrupting the transfer process and outputting multiple output warning information to warn the program creator of multiple output. 7. The multiple output eliminating method in a sequence program according to claim 6, wherein multiple output list information can be output together with multiple output warning information. 8. When inputting an input condition and an output condition corresponding thereto for each operation step of an industrial machine and editing a sequence program, a multiple output for outputting output members in duplicate for different input conditions is input. At this time, the multiple output warning information is output to warn the program creator of the multiple output, and the editing process can be continued.The multiple output is searched when the sequence program is saved at the end of editing, and the multiple output is detected. At the time of outputting the multiple output warning information and the multiple output list information and storing it, an execution module creation process for converting the edited sequence program data into control data is provided, and multiple outputs are searched when executing the execution module creation. Prohibits creation of execution module when multiple output is detected and outputs multiple output warning information and multiple output list information Multiple output exclusion method in the sequence program that.