JP5506635B2 - Engineering tools - Google Patents

Description

  The present invention relates to an engineering tool for extracting changes in a program in a graphical format used in a controller for controlling plant equipment.

  Regarding a conventional program change point extraction function, for example, Patent Document 1 proposes a method of comparing ladder circuit diagrams line by line using a minimum edit path algorithm to identify a program change point. .

Japanese Patent Laying-Open No. 2006-59044 (pages 5-6, FIG. 3)

The conventional program change point extraction function cannot extract changes up to the node level in a complicated circuit diagram such as when there is a vertical line of the ladder OR circuit.
On the other hand, a method of extracting a change point up to the node level by comparison at a bitmap level or by comparison at a coordinate unit where a figure is arranged can be considered. However, when compared with bitmaps or coordinate units, circuit diagrams that are logically unchanged, such as when the position of a node is shifted, are extracted, so that it is difficult to apply in actual use.
As a method for extracting a logically changed portion, a method of extracting a change point by using a mnemonic expression after compilation for execution by a CNS (controller) can be considered, but generally, a graphic expression and a mnemonic are used. Does not correspond one-to-one (the mnemonic after compilation may be different even if it looks the same figure), so the part that does not seem to change on the graphical editor seems to have changed because the mnemonic is different This method is also difficult to apply.

  The present invention has been made to solve the above-described problems, and provides an engineering tool for efficiently extracting changes in a program in a graphical format using an O (ND) algorithm that is a document comparison algorithm. The purpose is to get.

  In the engineering tool according to the present invention, in the engineering tool having a program editor for creating circuit diagram data which is a program in a graphical format, each circuit diagram is obtained from the circuit diagram data before the change and the circuit diagram data after the change. Net information extraction means for extracting net information, which is node connection information, and storing it as text data before change and text data after change, respectively, and text data before change extracted and stored by this net information extraction means And from the text data after the change, Diff means for obtaining the shortest edit distance between the two text data by the O (ND) algorithm which is a document comparison algorithm and extracting the change point between the two text data, and the output of the Diff means, Circuit diagram before change Those having a circuit diagram changes list generating means for generating a circuit diagram changes list mapped to data and circuit diagram data after the change.

  As described above, according to the present invention, in an engineering tool having a program editor for creating circuit diagram data that is a program in a graphical format, circuit diagrams can be obtained from circuit diagram data before change and circuit diagram data after change, respectively. Net information extraction means for extracting net information, which is connection information of each node, and storing it as text data before change and text data after change, respectively, and text before change that is extracted and saved by this net information extraction means Diff means for obtaining the shortest edit distance between the two text data from the data and the changed text data by the O (ND) algorithm, which is a document comparison algorithm, and extracting the change point between the two text data, and the output of the Diff means , Circuit diagram data before change and times after change Since with the circuit diagram changes list generating means for generating a circuit diagram changes list mapped to Figure, it is possible to correctly extract the logically modified portion of the circuit diagram data.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the whole system containing the engineering tool by Embodiment 1 of this invention. It is a block diagram which shows the engineering tool by Embodiment 1 of this invention. It is a block diagram which shows the change point extraction function of the engineering tool by Embodiment 1 of this invention. It is a figure which shows the example of the circuit diagram data (before change) used for the change point extraction of the engineering tool by Embodiment 1 of this invention. It is a figure which shows the example of the circuit diagram data (after change) used for the change point extraction of the engineering tool by Embodiment 1 of this invention. It is explanatory drawing which shows the ladder program used for the change point extraction of the engineering tool by Embodiment 1 of this invention. It is a figure which shows the example of the net information of the circuit diagram data used for the change point extraction of the engineering tool by Embodiment 1 of this invention. It is a block diagram which shows the change point extraction function of the engineering tool by Embodiment 2 of this invention. It is a figure which shows the example of the correction text data in FIG. It is a figure which shows the change point extraction result of the change point extraction function of the engineering tool by Embodiment 2 of this invention. It is a block diagram which shows the engineering tool by Embodiment 3 of this invention. It is a figure which shows the example of the change page list in FIG. It is a block diagram which shows the change point extraction function of the engineering tool by Embodiment 4 of this invention. It is a figure which shows the example of the change mark removal by the change extraction function of the engineering tool by Embodiment 4 of this invention. It is a block diagram which shows the change point extraction function of the engineering tool by Embodiment 5 of this invention.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing an entire system including an engineering tool according to Embodiment 1 of the present invention.
In FIG. 1, an engineering tool 1 is a semi-permanent program memory 101 that stores engineering functions, a CPU 100 that calls and executes the functions, a RAM 102 that is a temporary storage device for calculation, and information generated by the engineering tool 1 is semi-permanent. The external storage device 103 is stored in The program created by the engineering tool 1 and stored in the external storage device 103 is transferred to the CNS (controllers) 2 and 3 via the control network 4 and used as control logic for the controller that controls the plant equipment 6. The

The CNS 2 includes a nonvolatile memory 204 that stores a program created by the engineering tool 1, a program memory 201 that stores a calculation program, and a CPU 200 that reads and executes the program.
The CNS 3 has the same configuration as the CNS 2 and includes a nonvolatile memory 304 that stores a program created by the engineering tool 1, a program memory 301 that stores a calculation program, and a CPU 300 that reads and executes the program.
A plant device 6 is connected to the CNSs 2 and 3, and a program executed by the CPUs 200 and 300 receives an input from the plant device 6, performs an operation, and outputs the result to the plant device 6.
CNS2 and CNS3 constitute a duplex system and are connected by a tracking cable 5. When the A system (control system) is down, the control is switched to the B system. Data for program execution is copied (tracked) from the A system to the B system via the tracking cable 5, and the B system after switching is data that has been executed in the A system (control system) until then. The program can be resumed.

FIG. 2 is a block diagram showing an engineering tool according to Embodiment 1 of the present invention.
In FIG. 2, the engineering tool 1 uses a program editor 12 to create a graphical program. The created program is stored in the external storage device 103 of FIG. 1 in units of projects like the pre-change project 13 and the post-change project 14.
The change point extraction function 16 reads program information from the pre-change project 13 and the post-change project 14, extracts changes between them, and generates a document of the circuit diagram change point list 17. The circuit diagram change point list 17 is a WORD (registered trademark, the same applies hereinafter) document file in which a graphical program before and after the change is arranged and marked in the change part, and is created for each ladder program to be described later. The
In order to use the circuit diagram change point list 17 as an official document as it is, a WORD file 15 for a graphic frame is separately prepared to overlay the graphic frame and generate a WORD file.
The circuit diagram change point list 17, which is a WORD file, can be edited as necessary or printed on a paper file 19 using the WORD 18.

FIG. 3 is a configuration diagram showing the change point extraction function of the engineering tool according to the first embodiment of the present invention.
In FIG. 3, 13 to 17 are the same as those in FIG. FIG. 3 shows details of the change point extraction function 16.
The pre-change project 13 and the post-change project 14 include circuit diagram data 21 before change and circuit diagram data 22 after change created by the program editor 12, respectively.
The net information extraction function 23 (net information extraction means) extracts net information (connection information between each node) from the circuit diagram data 21 and 22, and text data (before change) 24 and text data (after change), respectively. 25 is generated.
The Diff function 26 (Diff means) receives the text data (before change) 24 and the text data (after change) 25 as input, and uses the O (ND) algorithm, which is a document comparison algorithm, to calculate the shortest edit distance between the two texts. Find and extract the changes.
The WORD generation function 27 (circuit diagram change point list generation means) receives the change location extracted by the Diff function 26 and the WORD file 15 for the picture frame, and generates a circuit diagram change point list 17 that is a WORD file.

FIG. 4 is a diagram showing an example of circuit diagram data (before change) used for extracting a change point of the engineering tool according to the first embodiment of the present invention.
In FIG. 4, a ladder circuit diagram is shown as an example of the circuit diagram data 21 before change included in the project 13 before change.

FIG. 5 is a diagram showing an example of circuit diagram data (after change) used for extracting the change point of the engineering tool according to the first embodiment of the present invention.
In FIG. 5, a ladder circuit diagram is shown as an example of the modified circuit diagram data 22 included in the modified project 14.

FIG. 6 is an explanatory diagram showing a ladder program used for extracting a change point of the engineering tool according to the first embodiment of the present invention.
FIG. 6 shows an example of a ladder program. FIG. 6 is a ladder circuit diagram (AND circuit) in which the output relay 500 is turned on when both the input relays 000 and 001 are turned on.

FIG. 7 is a diagram showing an example of net information of circuit diagram data used for extracting a change point of the engineering tool according to the first embodiment of the present invention.
FIG. 7 shows an example of net information (connection information between nodes) extracted by the net information extraction function 23, corresponding to the circuit diagram data 21 before change and the circuit diagram data 22 after change. Yes.

Next, the operation will be described.
A program in a graphical format created by the program editor 12 of the engineering tool 1 is transferred to the CNSs 2 and 3 via the control network 4 and used as control logic for a controller that controls the plant equipment 6.
In the engineering tool 1, when a program in a graphical format is created by the program editor 12, the program is read from the pre-change project 13 and the post-change project 14, and the change points are extracted for each ladder circuit diagram by the change point extraction function 16. Thus, a circuit diagram change point list 17 is created for each ladder circuit diagram.

Next, details of the operation of the change point extraction function 16 will be described.
As described above, the pre-change project 13 and the post-change project 14 include the pre-change circuit diagram data 21 and the post-change circuit diagram data 22 created by the program editor 12, respectively.
The net information extraction function 23 of the change point extraction function 16 extracts net information (connection information between each node) from the circuit diagram data 21 before the change and the circuit diagram data 22 after the change, and the text data (before the change). ) 24 and text data (after change) 25 are generated.

4 and 5 show circuit diagram data 21 before change and circuit diagram data 22 after change, which are included in the pre-change project 13 and the post-change project 14, respectively.
In the circuit diagram data 22 after the change in FIG. 5, M8000 is added after the node M7652 in the first row. This circuit diagram data 22 is an example of a ladder circuit diagram.
Here, the ladder circuit diagram is a programming language that is based on a sequence diagram (electric circuit diagram) and that makes it easy to visually imagine the relationship between input conditions and outputs. In a ladder program, a command word and a device are described in combination. FIG. 6 shows a ladder circuit diagram (AND circuit) in which the output relay 500 is turned on when both the input relays 000 and 001 are turned on.
In the ladder circuit diagram, nodes are connected by horizontal lines in the case of AND conditions, and are connected by vertical lines in the case of OR conditions.
In the present invention, a ladder circuit diagram is used. However, other symbols representing instructions and general graphical editors that connect symbols to each other can be processed in the same manner as in the present invention.

Next, the node connected to the left side of the node and the node connected to the right side are listed by node by the net information extraction function 23. This is net information.
FIG. 7 shows an example of net information (connection information between nodes) extracted by the net information extraction function 23.
In this example, since M8000 is added, with this addition, addition / change is extracted from the net information as indicated by the hatched portion in the figure.
Next, the Diff function 26 of the change point extraction function 16 receives the text data (before change) 24 and the text data (after change) 25 as input, and uses the O (ND) algorithm to obtain the shortest edit distance between the two texts. Extract changes. The change location extracted by the Diff function 26 and the WORD file 15 for the picture frame are input, and the circuit diagram change point list 17 of the WORD file is generated by the WORD generation function 27.

  According to the first embodiment, as described above, connection information between nodes of a program unit is extracted as net information and converted into a text format file, which is converted into a general document comparison algorithm O (ND). Since the change point is extracted by using the circuit diagram and the circuit diagram change point list is generated, the addition / deletion / change of the node on the circuit diagram can be correctly extracted as the change point.

Embodiment 2. FIG.
The second embodiment of the present invention will be described below with reference to the drawings.
FIG. 8 is a configuration diagram showing the change point extraction function of the engineering tool according to the second embodiment of the present invention.
In FIG. 8, 13-17 and 21-27 are the same as those in FIG. In FIG. 8, the change point extraction function 16 reads the text data (before change) 24 and the text data (after change) 25, analyzes them, determines the block breaks, and extracts a block delimiter extraction function 81. (Block delimiter extracting means) is provided, and the corrected text data (before change) 82 and the corrected text data (after change) 83 are generated with one extracted block as one line.

FIG. 9 is a diagram showing an example of the corrected text data in FIG.
In FIG. 9, the structure of the corrected text data (before change) 82 and the corrected text data (after change) 83 is shown, and a tag ([Block 1] etc.) indicating a block is attached. As shown in FIG. 4, the network information of the block is included.

FIG. 10 is a diagram showing a change point extraction result of the change point extraction function of the engineering tool according to the second embodiment of the present invention.
In FIG. 10, before and after the change are made to face each other for each block so that the changed part can be understood.

In a graphical program, functions are generally organized in units of blocks to which lines are connected, and changes, additions, deletions, etc. may be performed in units of these functions, that is, in units of blocks to which lines are connected. Many. Therefore, if changes are extracted in units of blocks and printed side by side in units of blocks, functional changes can be easily understood by the user.
The second embodiment corresponds to this, and as shown in FIG. 8, the block segment extraction function 81 is provided in the change point extraction function 16.
The block delimiter extraction function 81 reads and analyzes the text data (before change) 24 and the text data (after change) 25 to extract blocks. In the case of a ladder, a block break can be determined as a break where an output instruction and a load instruction are continued. (Generally, a graphical program in which blocks are present should be able to extract block breaks in some form.) Then, with one block as one line, modified text data (before change) as shown in FIG. 82 and corrected text data (after change) 83 are generated.

By executing the generated corrected text data (before change) 82 and the corrected text data (after change) 83 as a block using the same O (ND) algorithm of the Diff function 26 as in the first embodiment, You can extract changes in blocks.
FIG. 10 shows an example of printing in block units as a result of change point extraction. The blocks before and after the change are arranged in block units, and blanks are added when added or deleted. By arranging the blocks before and after the change, the changed blocks can be easily identified.
After the change points are extracted in units of blocks, different blocks are compared in connection information units by the Diff function 26 as in the first embodiment, and change points are extracted in units of instructions.

  According to the second embodiment, as described above, since the program before the change and the program after the change are compared in the block unit, the user can easily grasp the change point in the function unit. Identification becomes easy.

Embodiment 3 FIG.
The third embodiment of the present invention will be described below with reference to the drawings.
FIG. 11 is a block diagram showing an engineering tool according to Embodiment 3 of the present invention.
11, 1 and 12 to 19 are the same as those in FIG. In FIG. 11, a change page extraction function 31 (change) for extracting the page number of the changed circuit diagram to the engineering tool 1 based on the circuit diagram change point list 17 and outputting the WORD file change page list 32. Page extraction means) is provided. The WORD file change page list 32 is printed as a paper file 19 by the WORD 18.

FIG. 12 is a diagram showing an example of the changed page list in FIG.
In FIG. 12, the WORD file change page list 32 is simply a table number of page numbers including the change points.

When a user refers to a circuit diagram with a change, it is often necessary to search for a part of the change from a huge circuit diagram. When software such as WORD can be used, the search function of WORD can be used, but when changing the program at the site where the plant is operating, software such as WORD cannot be used, and the change place in the printed paper file You may need to search for.
The third embodiment corresponds to this, and the changed page extraction function 31 in FIG. 11 extracts the page number in which the circuit diagram has been changed based on the circuit diagram change point list 17, and FIG. A WORD file change page list 32 as shown is output. FIG. 12 is a format in which page numbers including changes are simply displayed in a table format and can be printed immediately, and is printed as a paper file 19 by WORD 18.
The modification point extraction algorithm and the like of the third embodiment are the same as those of the first or second embodiment.

  According to the third embodiment, as described above, since the page of the circuit diagram including the change point can be printed, the user can easily find the circuit diagram that has been changed using a paper file or the like. it can.

Embodiment 4 FIG.
Embodiment 4 of the present invention will be described below with reference to the drawings.
FIG. 13 is a configuration diagram showing the change point extraction function of the engineering tool according to the fourth embodiment of the present invention.
In FIG. 13, 13-17, 21-27 are the same as in FIG. In FIG. 13, the change point extraction function 16 is provided with a mark removal function 131 (mark removal means) that removes a mark attached as a change point from the circuit diagram change point list 17.

FIG. 14 is a diagram showing an example of change mark removal by the change extraction function of the engineering tool according to the fourth embodiment of the present invention.
FIG. 14 shows an example in which the change mark is removed from the circuit diagram change point list 17 by the mark removal function 131.

In both the first and second embodiments, a change point is extracted using an O (ND) algorithm, and the extracted change point is marked to create a circuit diagram change point list 17. In this case, a part where a line is automatically added by the editor function may be extracted as a change point. Such changes may not be considered as changes by the user.
The fourth embodiment corresponds to this, and as shown in FIG. 13, the change point extraction function 16 is provided with a mark removal function 131. As described above, the mark removal function 131 manually removes marks that have been extracted as change points using the O (ND) algorithm but are not desired to be regarded as change points by the user. It is a function for.
FIG. 14 shows a simple operation image of the mark removal function 131. For example, if you select AND M5121 with a ladder circuit diagram mark in the schematic modification list 17 and press the remove button, a warning will be displayed asking if you want to remove the mark. , AND M5121 is removed.

  According to the fourth embodiment, as described above, since the function for removing the mark is provided, it is possible to easily remove the mark indicating an unnecessary change point from the circuit diagram change point list, and it is more accurate for the user. A list of circuit diagram changes can be easily obtained.

Embodiment 5 FIG.
Embodiment 5 of the present invention will be described below with reference to the drawings.
FIG. 15 is a configuration diagram showing the change point extraction function of the engineering tool according to the fifth embodiment of the present invention.
In FIG. 15, 13-17, 21-27 are the same as in FIG. In FIG. 15, the changed line list 151 is transferred to the CNS 2 and 3 when the changed points of the text data (before change) 24 and the text data (after change) 25 are extracted to the Diff function 26 of the changed point extraction function 16. A function to generate has been added. Further, the change point extraction function 16 is provided with a transfer function 152 (transfer means) that refers to the changed line list 151 and transfers only changed program lines to the CNSs 2 and 3.

In the fifth embodiment, a function for generating a changed line list 151 is added to the Diff function 26 of the change point extraction function 16 for transfer to the CNSs 2 and 3. Text data (before change) by the Diff function 26 is added. When the change points 24 and text data (after change) 25 are extracted, the changed line list 151 is generated for transfer to the CNS.
The transfer function 152 refers to the changed line list 151 and transfers only changed program lines to the CNSs 2 and 3.
In the fifth embodiment, as a premise, a program transfer function in units of lines needs to be mounted on the CNS side.

  According to the fifth embodiment, as described above, only the changed program line is transferred to the CNS, so that the transfer time can be shortened.

  Needless to say, Embodiments 2 to 5 described above can be used in appropriate combination.

1 Engineering tool 2 CNS (A system)
3 CNS (B system)
4 Control network 5 Tracking cable 6 Plant equipment 12 Program editor 13 Pre-change project 14 Post-change project 15 WORD file 16 for drawing frame Change point extraction function 17 Circuit diagram change point list 21 Circuit diagram data (before change)
22 Circuit diagram data (after change)
23 Net information extraction function 24 Text data (before change)
25 Text data (after change)
26 Diff Function 27 WORD Generation Function 31 Changed Page Extraction Function 32 WORD File Changed Page List 81 Block Separator Extraction Function 82 Modified Text Data (Before Change)
83 Modified text data (after change)
100 CPU
101 Program memory 102 RAM
103 External storage device 131 Mark removal function 151 Changed line list 152 Transfer function 200 CPU
201 Program memory 204 Non-volatile memory 205 Tracking memory 300 CPU
301 Program memory 304 Non-volatile memory 305 Tracking memory

Claims (5)

In an engineering tool having a program editor for creating circuit diagram data that is a program in a graphical format,
Net information that is extracted from the circuit diagram data before the change and the circuit diagram data after the change, respectively, as net information that is connection information of each node of the circuit diagram, and is stored as the text data before the change and the text data after the change, respectively. Extraction means,
The shortest edit distance between the two text data is obtained by the O (ND) algorithm, which is a document comparison algorithm, from the text data before and after the change extracted and stored by the net information extracting means. Diff means for extracting changes of
And circuit diagram change point list generation means for generating a circuit diagram change point list by mapping the output of the Diff means to the circuit diagram data before the change and the circuit diagram data after the change. tool. In an engineering tool having a program editor for creating circuit diagram data that is a program in a graphical format,
Net information that is extracted from the circuit diagram data before the change and the circuit diagram data after the change, respectively, as net information that is connection information of each node of the circuit diagram, and is stored as the text data before the change and the text data after the change, respectively. Extraction means,
A block delimiter extracting unit that analyzes the text data before the change and the text data after the change, extracts a block that is a block of functions, and generates the corrected text data before the change and the corrected text data after the change in block units. ,
From the corrected text data before the change and the corrected text data after the change generated by the block delimiter extraction means, the O (ND) algorithm, which is a document comparison algorithm, obtains the shortest edit distance between the two corrected text data. Diff means for extracting changes between corrected text data in units of blocks,
The output of the Diff means, characteristics and to Rue engineering tool that corresponding block between both corrected text data is printed in alignment. From the circuit diagram changes list and extracts pages of a circuit diagram of changes, engineering tool according to claim 1 Symbol mounting characterized by comprising the modified page extraction means for printing as change page list list form . The circuit diagram changes list, together subjected mark the changes circuit diagram, according to claim 1 or claim 3, wherein further comprising a mark removal means for removing the mark manually Engineering tool. Referring to the circuit diagram changes list, only the rows of a circuit diagram data have changed, claim and further comprising a transfer means for transferring to a controller for controlling plant equipment 1 or claim 3 or The engineering tool according to claim 4 .

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