JPH09251307A - Editing device for ladder program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the editing device of a ladder program capable of efficiently performing an editing operation suited to the property of the ladder program that many similar circuit patterns are present. SOLUTION: In a ladder program initial file 10, the ladder program to be an editing object this time is stored by an instruction word. In a memory 20 for ladder diagram display, the ladder program to be the object of screen display is stored by a ladder diagram form. In an instruction word operation file and a ladder diagram operation file, the ladder program added by a copying operation is stored corresponding to the instruction word and a ladder diagram. In an entire row management table 50, the ladder program during the editing operation is expressed by using records arranged in an order with a row as a unit and to which file the record of the pertinent row belongs is indicated. An entire row management table management part 60 reflects the ladder program added/eliminated by the editing operation onto the records of the entire row management table 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder program editing apparatus used for describing an operation command in a PLC (programmable controller) or the like, and in particular, an improvement for easily editing a circuit such as copying or deleting. Regarding

[0002]

2. Description of the Related Art A ladder program is stored in a file in a form in which a ladder diagram is compiled into an instruction word, as disclosed in Japanese Patent Laid-Open No. 4-299705, which is proposed by the present applicant. This is because if the data is stored in the form of a ladder diagram, the file size becomes large, which causes a problem that the capacity of the storage medium and the file access speed become slow. When it is displayed on the screen, the instruction word is decompiled into a ladder diagram, the ladder diagram is loaded on the memory, and it is displayed.

Then, for example, as disclosed in Japanese Patent Laid-Open No. 4-199330, which is proposed by the applicant,
Debugging is performed on the source files written in the programming language. In the editing work of the ladder program, the circuit is copied or deleted only in the range loaded in the memory.

[0004]

However, if the editing work is performed only on the range loaded in the memory, the editing work cannot be smoothly performed on a ladder program having many similar circuit patterns. There were challenges. The present invention solves such a problem, and an object of the present invention is to provide an editing apparatus for a ladder program, which adapts to the nature of the ladder program in that there are many similar circuit patterns and enables efficient editing work.

[0005]

According to the present invention to achieve the above object, a ladder program initial file 10 in which a ladder program to be edited is described by using an instruction word, and a ladder to be edited for the time being. Ladder diagram display memory 2 that displays the program on the screen using the ladder diagram
0, a command word work file 30 in which a ladder program created by copying is written using command words, and a ladder diagram work file 40 in which a ladder program created by copying is written using a ladder diagram The ladder program being edited is expressed using records arranged in order in units of lines, and the records of the lines are the ladder program initial file, the ladder diagram display memory, the command word work file, and It has an all-row management table 50 having information on which of the ladder diagram work files it belongs to.

With respect to the ladder program read from the ladder program initial file to the ladder diagram display memory, the file to which the record corresponding to the ladder program belongs is changed from the ladder program initial file to the ladder diagram display memory. When changing the command word work file or the ladder diagram work file by the editing work, the layout of each record of the all-row management table is changed to match the change and All-row management table management unit 60 that displays whether or not the file belongs to the file.

According to the configuration of the present invention, in the ladder program initial file 10, the ladder program to be edited this time is stored by the command word. The ladder diagram display memory 20 stores a ladder program to be displayed on the screen in a ladder diagram format. The command word work file and the ladder diagram work file are stored according to whether the ladder program added by the copying work is the command word and the ladder diagram. The all-rows management table 50 represents the ladder program being edited by using records arranged in order in units of lines, and indicates to which file the record of the row belongs. The all-row management table management unit 60 reflects the ladder program added / deleted by the editing work in the record of the all-row management table 50.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, the ladder program initial file 10
In, a ladder program to be edited is described using command words. When creating a new ladder program, this ladder program original file 1
0 does not exist. Here, the instruction word is LD, AND,
Refers to a phrase that uses English characters such as OR. The ladder diagram display memory 20 displays a ladder program to be edited for the time being on the screen using a ladder diagram. In the case of PLC, the area of the image memory is limited. Several lines are displayed. In the command word work file 30, a ladder program created by copying the original ladder program file 10 is described using command words. The ladder diagram work file 40 is
A ladder program created by copying from the ladder diagram display memory 20 is described using a ladder diagram.

The all-line management table 50 is expressed by using a record in which the ladder program being edited is arranged in order on a line basis, and the record of the line is the ladder program initial file 10 and the ladder diagram. It shows which of the display memory 20, the command word work file 30 and the ladder diagram work file 40 belongs to.
Among them, the ladder program displayed in the ladder diagram display memory 20 is updated or newly input by the editing work, so that the other files 10, 30,
40 is in a priority position. Therefore, the ladder program stored in the ladder diagram display memory 20 is the ladder program initial file 10 or the command word work file 3.
Even if the command words read from 0 are displayed in a ladder diagram or are ladder diagrams stored in the ladder diagram work file 40, and there are overlapping files, the ladder diagram It is treated as belonging to the display memory 20.

The all-row management table management unit 60 supplements and corrects the all-row management table 50 in accordance with the progress status of the editing work. First, regarding the ladder program read from the ladder program initial file 10 to the ladder diagram display memory 20, the file to which the record corresponding to this ladder program in the all-row management table 50 belongs is the ladder program initial file. 10 is changed to the ladder diagram display memory 20. Secondly, when the command word work file 30 or the ladder diagram work file 40 is changed by the editing work, the arrangement of each record of the all-line management table 50 is changed in accordance with this change, and
Display which file the record belongs to.
Changing the contents of this file involves a problem of copying and deleting a specific line of the ladder program, which will be specifically described later.

FIG. 2 is a diagram showing a concrete example of each file in the apparatus of FIG. The all-rows management table 50 manages the ladder program by records in units of rows. Each row has a column for displaying circuit information, a column for displaying a storage location, and a column for displaying a pointer. The circuit information is a circuit concept peculiar to a ladder program, such as the number of lines in one circuit. The storage location indicates in which file the ladder data of the line is stored. When the ladder program initial file 10 is the ladder diagram display memory 20, the command work file is stored. When it is 30, it is displayed when it is the ladder diagram work file 40. The pointer indicates the position of each file stored.

FIG. 3 is a block diagram of the configuration when the editing work is a copying work. In the figure, the edit-time work file management unit 70 stores the command word to be copied in the command word work file 30 and the ladder diagram to be copied in the ladder diagram work file 40.
It manages changes to the contents of 0 and 40. When changing the contents of the command word work file 30 or the ladder diagram work file 40 in the edit-time work file management unit 70, the all-row management table management unit 60 records a record related to the copying work in the all-row management table 50. Is added to the line designated by the copy operation, and lines are sequentially shifted for records after the added line.

4A and 4B are explanatory views for explaining the change of the all-rows management table 50. FIG. 4A shows a copying operation and FIG. 4B shows a deleting operation. First, as a copying operation, a case where the ladder program corresponding to the Ath row to the Bth row in the all row management table 50 is copied to the Cth row will be described as an example. The all-row management table management unit 60 adds a record of (B-A + 1) rows to the C-th row of the all-row management table 50. At that time, the records on and after the line C are (B-A + 1)
The lines are moved back one by one. Since the increment of the all-row management table is known in advance, it is performed collectively.

The all-row management table management unit 60 checks in which file the ladder data to be copied is stored by referring to the record of the all-row management table 50. The edit-time work file management unit 70 stores the ladder data as follows based on the information. First, when the ladder data is a ladder diagram, the ladder diagram to be copied is the ladder diagram display memory 20 or the ladder diagram work file 4.
Since it exists in 0, this is the ladder diagram work file 4
The data is sequentially stored at the end of 0. Secondly, when the ladder data is an instruction word, the instruction word to be copied exists in the initial file 10 of the ladder program or the instruction word work file 30, so that it is sequentially stored at the end of the instruction word work file 40. I will do it. The all-rows management table management unit 60 adds a record indicating the work file serving as the storage location and a record indicating the detailed storage Basho in the work file to the record of the Cth row generated by copying. The above work is repeated from the A-th line to the B-th line.

Next, as a deleting operation, the case of deleting the ladder program corresponding to the lines A to B in the all-rows management table 50 will be described as an example. The records from the target A-th line to the B-th line are deleted from the all-line management table 50. Then, for the records after the deleted line, the lines are sequentially moved up to maintain the continuity of the line numbers in the all-line management table 50.

FIG. 5 is a block diagram showing the configuration when the editing work is completed. When the editing work is completed, the edited result creating unit 80 creates a post-editing file 90 for the ladder program. The edit result generation unit 80 uses the all-row management table 5
The record is decoded according to the line number of 0, and the ladder program described by the command word is sequentially stored in the post-editing file 90 of the ladder program by using the file and the pointer which are the storage locations at the final time of the editing operation of the record. . Then, the ladder program initial file 10, the ladder diagram display memory 20, the command word work file 30, the ladder diagram work file 40, and the all-line management table 50, which are intermediate files used in the editing work, lose their missions.

[0017]

As described above, according to the present invention, the all-row management table 50 is provided, and the records of the all-row management table 50 are changed according to the change of the ladder data for copying or deleting the ladder program in the editing work. Since the numbers are rearranged or shifted, there is an effect that the editing work can be performed quickly as compared with the conventional work file in which the ladder data is successively moved up and down.

Further, in the copying work, the command word work file 30 and the ladder diagram work file 40 are provided to store the copied ladder data, so that it is copied in the range of the memory for displaying the ladder diagram as in the conventional case. Compared with the case of storing ladder data, there is no limitation on the copyable range or the number of lines, which brings about an effect that editing work can be performed smoothly.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a specific example of each file in the apparatus of FIG.

FIG. 3 is a configuration block diagram when the editing work is a copying work.

FIG. 4 is an explanatory diagram illustrating a change of the all-rows management table 50.

FIG. 5 is a block diagram showing a configuration when editing work is completed.

[Explanation of symbols]

 10 Ladder program initial file 20 Ladder diagram display memory 30 Command word work file 40 Ladder diagram work file 50 All line management table 60 All line management table management unit

Claims (2)

[Claims] 1. A ladder program initial file (10) in which a ladder program to be edited is described by using an instruction word, and a ladder program for displaying the ladder program to be edited at the moment by using a ladder diagram. Figure display memory (20)
And a command word work file (30) in which the ladder program created by copying is written using command words, and a ladder diagram work file in which the ladder program created by copying is written using ladder diagrams ( 40), and the ladder program being edited is expressed using records arranged in order by line, and
An all-rows management table (50) having information as to which of the ladder program initial file, the ladder diagram display memory, the command work file and the ladder diagram work file the record of the line belongs to, and the ladder program initial Regarding the ladder program read from the file to the ladder diagram display memory, the file to which the record corresponding to the ladder program belongs is changed from the ladder program original file to the ladder diagram display memory and the editing operation is performed. When changing the command word work file or the ladder diagram work file, the arrangement of each record in the all-rows management table is changed in accordance with this change, and the file to which the record belongs is displayed. And a line management table management unit (60) Editing apparatus of ladder program, characterized in that. 2. The ladder program editing apparatus according to claim 1, wherein when the editing work is a copying work, the command word to be copied is stored in the command word work file and the ladder diagram to be copied is displayed. The edit work file management unit (70) to be stored in the ladder diagram work file, and when changing the contents of the command word work file or the ladder diagram work file in the edit work file management unit, the all line management table is used. On the other hand, the all-row management table management unit (60) is provided for adding a record related to the copy operation to a line specified in the copy operation, and sequentially shifting rows for the records after the added line. The ladder program editing apparatus according to claim 1, wherein: