JP2006244178A - Collation program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a collation program capable of collating a corresponding step of a first ladder control program and a second ladder control program even when a command is added in collation of the first ladder control program and the second ladder control program. <P>SOLUTION: This collation program makes a computer execute a procedure (step S203) for comparing and collating a first block and a second block wherein a block number of the first block owned by the first ladder control program and a block number of the second block owned by the second ladder control program are same; a procedure (step S205) for extracting a processing command, a kind of an element, and an element ID included in the first block and the second block as comparison elements; and a procedure (step S207) for determining whether the comparison elements included in the first block and the second block are coincident or not. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a collation program for collating a ladder control program stored in a PLC having a processing instruction, an element type, and an element ID with an edited ladder control program.

  2. Description of the Related Art Conventionally, a program logic controller (PLC) has been widely known as a control device using a microcomputer for controlling devices. The PLC stores a control program and executes the control program to control output to each control device such as a lamp and a power switch by input from each control device such as various sensors.

  For example, a ladder control program described in a ladder system is composed of a plurality of unit blocks. Each unit block includes a step having a block number assigned to each block, a step number, a processing instruction, a type of element for executing the processing instruction, and an element ID.

  As a method for expressing a ladder control program described in a ladder system, a ladder diagram in which symbols of each control device are arranged in accordance with the order of operations and is easy to understand is widely used. As a method for easily grasping the progress status of the ladder control program described in the ladder method, a method of outputting the progress status of the ladder control program using a ladder diagram has been proposed (for example, Patent Document 1).

  According to this output method, the contents of the operation of the machine or the like can be easily confirmed according to the progress of the ladder control program.

  Here, it is necessary to check the ladder control program when adjusting different PLCs for equipment that moves the same in equipment maintenance, etc., but it is easy to compare and check the ladder control programs of different PLCs. is not. Therefore, generally, the ladder control program stored in each PLC is copied to a computer via a memory or the like. Then, the copied ladder control program of each PLC is compared by a computer, and if there is a different part, a rewriting method is taken. Specifically, the user compares the ladder control program stored in the PLC No. 1 (hereinafter referred to as the first ladder control program) with the program stored in the PLC No. 2 (hereinafter referred to as the second ladder control program). Check if the rewrite was done correctly. A collation program that facilitates comparison between the first ladder control program and the second ladder control program is also known.

The collation program determines “match” if the description of the m-th (step number m) step in the first ladder control program and the description of the step number m in the second ladder control program completely match, If the description of the step with the step number m in the first ladder control program is slightly different from the description of the step with the step number m in the second ladder control program, it is determined as “mismatch”.
JP 2000-293208 A (Page 3, FIG. 2)

 As described above, the collation program determines whether each step matches or does not match, and outputs which step is determined to be mismatched.

 However, in the above-described collation program, when an instruction is added to or deleted from the editing program, all steps are determined to be inconsistent in determination of steps after the added or deleted instruction.

 Accordingly, there is a problem that the user has to change the contents of the first ladder control program in the same manner as the second ladder control program and execute the collation program again.

 Therefore, the present invention has been made in view of the above-described problems, and even when an instruction is added when the first ladder control program and the second ladder control program are collated, the first ladder is obtained. It is an object of the present invention to provide a collation program capable of collating corresponding steps of a control program and a second ladder control program.

 In order to solve the above-described problem, the collation program according to the present invention is characterized by processing instructions (processing instructions F30), types of elements that execute the processing instructions (element types F41), and elements assigned to the elements A first ladder control program (first ladder control program 400P) having at least a plurality of unit blocks (unit blocks F3) including a step (step F1) having an ID (element IDF43), and a second having at least a plurality of the unit blocks. A collation program for collating with a ladder control program (second ladder control program 410P), which is a block number (assigned to a first block which is the unit block of the first ladder control program) to a computer (computer 200). Block number F10) and the second ladder A block determination procedure (step S203) in which the first block having the same block number assigned to the second block as the unit block included in the control program is compared with the second block; The processing instruction included in the block, the element type, and the element ID are extracted as comparison elements (comparison element F5), and the processing instruction included in the second block, the element type, Extraction procedure (step S205) for extracting an element ID as a comparison element and comparison for determining whether or not the comparison element included in the first block matches the comparison element included in the second block The gist is to execute the element determination procedure (step S207).

  According to such a feature, the collation program determines whether each unit block matches or does not match for each comparison element, so that even if the step numbers are different, the comparison program determines that the comparison elements match. it can. That is, the user can know the information about the match or mismatch for each unit block, unlike the collation that only determines the match or mismatch for each step. Therefore, the collation program can collate the corresponding steps of the first ladder control program and the second ladder control program even when an instruction is added.

  Further, the comparison element F5 in the collation program according to the feature of the present invention is associated with a weighting value (weighting value F7) according to the importance of the comparison element, and the determination result in the comparison element determination procedure (step S207). In addition, a block determination procedure (step S211) for determining the degree of coincidence (block coincidence degree F9) between the first block and the second block based on the weight value may be further executed.

 According to this feature, the collation program can determine the block coincidence for each block by calculating the block coincidence for each unit block according to the determination result and the weighting value in the comparison necessity determination element procedure.

  In addition, the collation program can efficiently provide information on blocks (blocks with a low degree of matching) or the like to the user by classifying the determination for each block according to the degree of block matching. .

  Further, when the matching degree (block matching degree F9) is lower than a reference value in the determination result in the block determination procedure (step S211) in the collation program according to the feature of the present invention, the block number (block) assigned to the second block A block collation procedure (step S217) may be further performed in which the second block having the block number next to the number F10) and the first block are newly compared.

  According to this feature, the collation program newly sets the block number of the first block by using the second block having the block number next to the block number assigned to the second block and the first block as a comparison reference. And a comparison with a second block having a different block number.

  When the second ladder control program has a block added at the time of editing, the collation program compares the second part block having a block number after the block number of the first block, thereby comparing the first block having a different block number. Whether the block and the second block are matched or not can be determined.

  Further, the output procedure (step S215) for outputting the determination result in the comparison element determination procedure (step S207) or the determination result in the block determination procedure (step S211) in the collation program according to the feature of the present invention may be further executed. Good.

  According to such a feature, the collation program outputs whether or not each comparison element matches in the unit block, so that the collation result for each step by the collation that only determines whether the unit matches or does not match in units of steps. Unlike the above, it is possible to provide information about whether or not corresponding steps match in block units.

  By outputting the determination result based on the block matching degree in the block determination procedure, the user is provided with the information for each block determined based on the block matching degree, instead of providing all the mismatch information for each step to the user. can do.

The collation program classifies and outputs the judgment for each block according to the block matching degree, and thereby efficiently provides the user with information regarding blocks whose block matching degree has changed greatly (blocks with a low block matching degree). Can do.

 According to the present invention, when the first ladder control program and the second ladder control program are collated, even if an instruction is added, the first ladder control program and the second ladder control program correspond to each other. A collation program that can collate the steps can be provided.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

(Overall system configuration)
FIG. 1 is an overall schematic configuration diagram of a system in which a collation program according to the present embodiment is used. The system according to the present embodiment includes a computer 200 that stores a verification program, a PLC No. 1 400 that stores a first ladder control program (hereinafter referred to as a first ladder control program 400P) that controls the No. 1 device 600, and an No. 2 device 610. The second ladder control program (hereinafter referred to as the second ladder control program 410P) for controlling the second ladder control program 410 stores the second ladder control program.

  The description method of the first ladder control program 400P and the second ladder control program 410P is a ladder method in which symbols of the respective control devices are arranged in the order of their operations, and is defined as a standard in IEC 61131-3 and JIS B3503.

(Configuration of ladder control program)
FIG. 2A is an example of a ladder control program described in a ladder system.

  The ladder control program is stored as a first ladder control program 400P and a second ladder control program 410P. The ladder control program is composed of a plurality of unit blocks F3. The unit block F3 is configured by arranging step F1 having a block number F10, a step number F20, a processing instruction F30, and an element F40 for executing the instruction content. The ladder control program is executed in the order of step number F20, and is repeatedly executed from the 0-step instruction to the END instruction. Hereinafter, each configuration information will be described.

(1) Block number F10
The block number F10 is an identifier that is appropriately assigned according to the order of the unit blocks F3. The block number F10 is information indicating which unit block F3 the step F1 belongs to.

(2) Processing instruction F30
The processing instruction F30 is information indicating the instruction content. For example, the processing instruction F30 includes an a contact bus connection (LD), an output instruction (OUT), and the like (see FIG. 2B). In addition, there are bus connection (LDI) of b contact, series connection (AND) of a contact, parallel connection (OR) of a contact, operation holding output (SET), etc. (not shown).

(3) Element F40
The PLC No. 1 400 and the PLC No. 2 410 have a large number of functions such as relays, timers, and counters. An element F40 indicates an element for executing a processing instruction, and includes an element type F41 and an element IDF 43 corresponding to the element type F41. The element type F41 is information indicating the type of the built-in element. For example, there are an input relay (X), an output relay (Y), an auxiliary relay (M), a timer (T), a counter (C), and the like. The element ID F43 is an identifier that is appropriately assigned according to the type of element.

  FIG. 2B is an example of a ladder control program described in the ladder system of FIG.

  In the ladder diagram, a vertically extending control power supply bus F50 and a relay symbol arranged between the two control power supply buses F50 are arranged. In the ladder diagram, a unit block F3 is formed by a line connecting the left and right control power supply bus F50 and the relay symbol and the relay symbol.

  In the ladder diagram, unit blocks F3 having a block number F10 are arranged vertically in the order in which the program proceeds.

  The relay symbol has a step number F20 indicating the order of instructions, a processing instruction F30, an element type F41 for executing the instruction, and an element ID F43. The relay symbol includes an input relay F51 that emits an input signal and an output relay F52 that receives and outputs the input signal. In the ladder diagram, the program proceeds to obtain an input signal from the left input relay F51 and output it to the output relay F52 on the right side.

  Specifically, in the ladder diagram, when the input relay X1 with step number 0 is input, the output relays with step number 2 and step number 3 are output. Thereby, when the output relay T1 of step number 2 is output, the input relay T1 of step number 4 is input, and the output relays of step number 6 and step number 7 are output. Similarly, the program proceeds by repeating input and output.

  FIG. 2C is a specific example when the first ladder control program 400P and the second ladder control program 410P described in FIGS. 2A and 2B are actually operated. In this ladder diagram (FIG. 2B), when the signal X1 is input at step number 0 (for example, when the button X1 is pressed), Y1 is output (for example, the light bulb Y1 is lit). At this time, since the Y1 signal of step number 1 is also input, even if the input of X1 stops, Y1 and T1 can maintain the output state. At the same time, the timer T1 is activated, and T1 of step number 4 is input after t1 seconds. Thereby, Y2 of step number 7 is also output (for example, the light bulb Y2 is turned on after t1 seconds). Similarly, Y3 is output after t2 seconds, and this program ends processing.

(Computer logical block configuration)
FIG. 3 is a logical block configuration diagram of the computer 200 described above. The collation program according to the present embodiment is executed by the computer 200. Hereinafter, portions related to the present invention will be mainly described. Therefore, the computer 200 illustrated in FIG. 3 may include a logical block (power supply unit or the like) that is not illustrated or that is not described in detail, which is essential for realizing the functions of the computer.

  The computer 200 includes an acquisition unit 201, an editing program storage unit 203, an extraction unit 205, a determination unit 207, an output unit 209, a weighting storage unit 211, and a determination criterion storage unit 213.

  The take-in unit 201 is connected to the PLC No. 1 400 and takes in the first ladder control program 400P stored in the PLC No. 1 400. Similarly, the take-in unit 201 is connected to the PLC No. 2 machine 410 and takes in the second ladder control program 410P stored in the PLC No. 2 machine 410.

  Specifically, the capturing unit 201 captures the first ladder control program 400P by connecting an external recording medium in which the first ladder control program 400P is recorded in the PLC 1 machine 400 to the capturing unit 201 of the computer 200.

  Similarly, the capturing unit 201 captures the second ladder control program 410P by connecting the external recording medium in which the second ladder control program 410P is recorded by the PLC No. 410 to the capturing unit 201 of the computer 200.

  The take-in unit 201 may be connected to the PLC No. 1 400 and the PLC No. 2 410 via a wired LAN interface to take in the ladder control program. The fetched ladder control programs are stored in the editing program storage unit 203 as a first ladder control program 400P and a second ladder control program 410P, respectively.

  Note that the ladder control program of the PLC No. 1 400 and the PLC No. 2 410 is not cut out from the PLC No. 1 400 and the PLC No. 2 410, but is taken in to be rewritten by the computer 200, and the PLC No. 1 400 and the PLC No. 2 The original ladder control program remains in 410.

  The editing program storage unit 203 stores a first ladder control program 400P and a second ladder control program 410P. Specifically, the editing program storage unit 203 may use an internal storage device such as a RAM or an external storage device such as a hard disk or a flexible disk.

  The extraction unit 205 determines the unit block F3 included in the first ladder control program 400P and the unit block F3 included in the second ladder control program 410P as comparison references (block determination). (Here, the unit block F3 included in the first ladder control program 400P is hereinafter referred to as a first block, and the unit block F3 included in the second ladder control program 410P is hereinafter referred to as a second block). The first block included in the first ladder control program 400P and the second block included in the second ladder control program 410P are compared for each comparison element F5. The comparison element F5 is configured on the basis of a processing instruction F30, an element type F41, and an element ID F43 that are important in configuring a ladder control program.

  The determination unit 207 determines whether or not the comparison element F5 included in the first block of the first ladder control program 400P matches the comparison element F5 included in the second block of the second ladder control program 410P. Determine each time (comparison element determination). Specifically, the determination unit 207 includes a processing instruction F30 included in the first block, an element type F41, an element ID F43, a processing instruction F30 included in the second block, an element type F41, It is determined whether or not the element ID F43 matches each other.

  Further, the determination unit 207 calculates a block matching degree F9 (described later) between the first block and the second block. This block matching degree F9 is calculated using a weighting value F7 (described later) of a comparison element F5 of a weighting table D211 (described later). Specifically, based on the comparison element determination described above, the determination unit 207 calculates 100 points in the case of coincidence and 0 points in the case of disagreement according to the weighting for each comparison element F5, and calculates the weight value F7. The determination unit 207 calculates the block matching degree F9 by adding the weighted value F7 of the matched comparison element F5.

  The determination unit 207 determines whether or not the unit block F3 matches based on the block matching degree F9 and the matching degree determination table D213 (block determination). When it is determined that there is a mismatch in the block determination, the determination unit 207 newly compares the second block having the block number next to the block number assigned to the second block included in the second program with the first block. (Block verification). When all the second blocks and the first block are determined and a mismatch is determined, the determination unit 207 determines a mismatch. On the other hand, when the determination is not performed for all the second blocks, the determination unit 207 transmits information that is not determined to be all the second blocks to the extraction unit 205.

  Note that the determination unit 207 may classify the match determination into a “perfect match” determination and a “match with difference” determination based on the match determination table D213. Further, the determination unit 207 may classify the mismatch determination into a “possibility of matching” determination and a “mismatch” determination based on the matching degree determination table D213.

  The output unit 209 outputs the determination result of the determination unit 207 described above. Specifically, the output unit 209 outputs to a monitor or the like.

  The weight storage unit 211 stores a weighting table D211 (see FIG. 4) described later. Specifically, the weight storage unit 211 may use an internal storage device such as a RAM or an external storage device such as a hard disk or a flexible disk.

  The determination criterion storage unit 213 stores a coincidence degree determination table D213 (see FIG. 5) described later. Specifically, the determination criterion storage unit 213 may use an internal storage device such as a RAM or an external storage device such as a hard disk or a flexible disk.

  Next, the weighting table D211 stored in the weighting storage unit 211 described above will be described. FIG. 4 shows the contents of the weighting table D211. The weighting table D211 is a table in which the comparison element F5 is associated with the weighting value F7. The weighting table D211 has a weighting value F7 for each comparison element F5. The weighting value F7 is a value calculated by weighting set in advance by the user.

  Next, the coincidence degree determination table D213 stored in the above-described determination criterion storage unit 213 will be described. FIG. 5 shows the contents of the coincidence degree determination table D213. The coincidence determination table D213 is a table in which the block coincidence F9 is associated with the collation determination. The collation determination is divided into a match / mismatch determination and a detailed determination.

 There are two types of match / mismatch determination: match determination or mismatch determination. Specifically, the determination unit 207 determines a match when the block matching degree is 80 or more. Also, the determination unit 207 determines a mismatch when the block matching degree is less than 80 points.

 For example, when the comparison element determination between the verification professional first block and the second block is performed, the processing instruction F30 and the element ID F43 are determined to match, but the element type F41 is determined to be mismatched.

 In this case, based on the weighting table D211, the determination unit 207 has numerical values such that the weighting value F7 of the processing instruction F30 is 50 points, the weighting value F7 of the element type F41 is 0 points, and the weighting value F7 of the element ID F43 is 20 points. Is calculated.

 The determination unit 207 calculates the block matching degree F970 by adding the weighting value F7 for each comparison element F5. The determination unit 207 determines a mismatch based on 70 points of the block matching degree F970 and the matching degree determination table D213.

  The detailed determination is stepwise classified into “complete match”, “match with difference”, “possibility of match”, and “mismatch” in descending order of the block match F9 according to the block match F9.

  Specifically, the determination unit 207 determines “perfect match” when the block matching degree is 100 points. The determination unit 207 determines “match with difference” when the block matching degree is 80 to 99 points. The determination unit 207 determines “matching possibility” when the block matching degree is 50 to 79 points. The determination unit 207 determines “mismatch” when the block matching degree is 0 to 49 points.

  The score of the block matching degree F9 divided for each detailed determination is a value set in advance by the user. Further, the detailed determination is not limited to these four stages, and can be increased or decreased according to the needs of the user.

 FIG. 6 is a partial extract of an example in which the determination result obtained by the collation program is output. FIG. 6 shows a ladder diagram of the first ladder control program 400P and the second ladder control program 410P that are to be compared. In FIG. 6, the unit block F3 determined to be inconsistent based on the degree-of-match determination table D213 is surrounded by a dotted line.

  For example, in FIG. 6, the second ladder control program 410P adds a step to the unit block F3 with the block number 2 so that when compared with the first ladder control program 400P, the processing instruction F30, the element ID F43, As a result of the determination that the element type F41 does not match, the block number 2 is surrounded by a dotted line.

  In FIG. 6, by displaying the comparison ladder control program on the left and right, the difference in the structure of the ladder control program can be immediately confirmed. Moreover, the determination result obtained by the collation program may take a method in which the type of dotted line is divided step by step according to the detailed determination of the coincidence determination table D213 in FIG.

(Verification program operation)
Next, with reference to FIG. 7, the operation flow of the collation program that collates the first ladder control program 400P having the unit block F3 and the second ladder control program 410P having the unit block F3 will be described.

 Here, the first ladder control program 400P includes first to nth unit blocks F3. The second ladder control program 410P includes first to mth unit blocks F3.

 As shown in FIG. 7, in step S201, the capturing unit 201 captures the first ladder control program 400P from an external recording medium on which the first ladder control program 400P is recorded by the PLC 1 machine 400. The fetched first ladder control program 400P is stored in the editing program storage unit 203 as the first ladder control program 400P. Similarly, the capturing unit 201 captures the second ladder control program 410P from the external recording medium on which the second ladder control program 410P is recorded by the PLC No. 410. The fetched second ladder control program 410P is stored in the editing program storage unit 203 as the second ladder control program 410P.

  In step S203, the extraction unit 205 determines the i-th unit block F3 of the second ladder control program 410P and the i-th unit block F3 of the first ladder control program 400P as comparison references.

  In step S205, the extraction unit 205 extracts the comparison element F5 included in the unit block F3 of the second ladder control program 410P and the comparison element F5 included in the unit block F3 of the first ladder control program 400P.

  In step S207, the determination unit 207 determines whether or not the comparison element F5 included in the unit block F3 of the first ladder control program 400P matches the comparison element F5 included in the unit block F3 of the second ladder control program 410P. Determine.

  In step S209, the determination unit 207 calculates the block matching degree F9 by adding the weighting value F7 of the comparison element F5 determined to be matching in step S207.

  In step S211, the determination unit 207 determines matching or mismatching based on the block matching degree F9 calculated in step S209 and the matching degree determination table D213.

  In step S213, the determination unit 207 proceeds to step S215 if the block matching degree F9 is determined to be coincident in step S209, and proceeds to step S217 if it is determined that the block coincidence is not coincident.

  In step S215, the output unit 209 outputs matching or mismatching based on the determination in step S211 regarding the block matching degree F9. Specifically, the output unit 209 outputs a match when the block matching degree F9 is determined to be a match in step S209, that is, Yes in step S211. Further, the output unit 209 outputs a mismatch when all the blocks are collated in step S215 (described later), that is, in step S217 Yes. Note that the output unit 209 selects any one of “complete match”, “match with difference”, “possibility of match”, and “mismatch” based on the match determination table D213 and the block match F9. May be output.

  In step S217, the determination unit 207 searches whether or not the i-th to m-th unit block F3 of the second ladder control program 410P is compared with the i-th unit block F3 of the first ladder control program 400P. To do. If the i-th to m-th unit block F3 of the second ladder control program 410P is collated, the determination unit 207 proceeds to step S215. If the i-th to m-th unit block F3 of the second ladder control program 410P is not collated, the determination unit 207 proceeds to step S203.

  When the i-th to m-th unit block F3 is not collated, in step S203, the extraction unit 205 determines the next (i + 1) -th unit block F3 of the second ladder control program 410P, and the The decision is made to collate with the i-th unit block F3 of the 1 ladder control program 400P.

  Further, the collation program may omit step S209, step S211 and step S217. In this case, in step S213, the output unit 209 outputs the determination result in step S207. Specifically, the output unit 209 determines whether or not the comparison element F5 included in the unit block F3 of the first ladder control program 400P matches the comparison element F5 included in the unit block F3 of the second ladder control program 410P. Information is output.

  It should be noted that the ladder control program to be compared is not limited to the first ladder control program 400P and the second ladder control program 410P, and may of course be two ladder control programs with the purpose of collation.

(Operation and effect of the collation program according to this embodiment)
According to the collation program according to the present embodiment described above, the collation program determines whether each unit block F3 matches or does not match for each comparison element F5, so that the comparison element F5 is different even if the step number F20 is different. If they match, it can be determined that they match. That is, the user can know the information about the match or mismatch for each unit block F3, unlike the collation that only determines the match or mismatch for each step F1. That is, the collation program can collate the corresponding step F1 between the first ladder control program and the second ladder control program even when an instruction is added.

 Further, the collation program determines the block matching degree F9 for each block by calculating the block matching degree F9 for each unit block F3 according to the determination result in the comparison element determination procedure (step S207) and the weighting value F7. Can do.

  Further, the collation program classifies the determination for each unit block F3 according to the block matching degree F9, so that the user can efficiently obtain information on the unit block F3 (block with a low matching degree) etc. whose block matching degree F9 has changed significantly. Can be provided well.

  The collation program according to the third aspect of the present invention has the second block having the block number F10 next to the block number F10 assigned to the second block and the first block as a new comparison reference. A comparison between a block number F10 of one block and a second block having a different block number F10 can be performed.

 When the second ladder control program has the unit block F3 added at the time of editing, the collation program compares the second part block having the block number F10 after the block number F10 of the first block, thereby comparing the block number. It is possible to determine whether the first block and the second block having different F10 match or do not match.

  In addition, the collation program outputs whether or not each comparison element F5 matches in the unit block F3, so that the collation result for each step F1 by the collation that only determines whether the unit matches or does not match in step F1 units. Unlike the case, information about whether or not the corresponding step F1 is the same can be provided in the unit block F3.

  By outputting the block matching degree F9 in the block determination procedure (step S211) as a determination result, the block matching determined based on the weighting value F7 is not provided to the user for all the mismatch information for each comparison element F5. Information of degree F9 can be provided.

  The collation program classifies and outputs the determination for each unit block F3 according to the block matching degree F9, so that the unit block F3 whose block matching degree F9 has changed greatly to the user (unit block F3 having a low block matching degree F9). Etc. can be provided efficiently.

It is a whole schematic block diagram of the collation program which concerns on one Embodiment of this invention. It is explanatory drawing explaining the structure of the ladder control program collated with the collation program which concerns on one Embodiment of this invention. It is a logic block block diagram of the collation program which concerns on one Embodiment of this invention. It is explanatory drawing explaining the weighting information set to the collation program which concerns on one Embodiment of this invention. It is explanatory drawing explaining the coincidence degree determination information set to the collation program which concerns on one Embodiment of this invention. It is explanatory drawing explaining the information output by the collation program which concerns on one Embodiment of this invention. It is an operation | movement flowchart of the collation program which concerns on one Embodiment of this invention.

Explanation of symbols

200 ... Computer 201 ... Reading unit 203 ... Editing program storage unit 205 ... Extracting unit 207 ... Determining unit 209 ... Output unit 211 ... Weighting storage unit D211 ... Weighting table 213 ... Determination reference storage unit D213 ... Matching degree determination table 400 ... PLC 1 machine 400P ... 1st ladder control program 410 ... PLC 2 machine 410P ... 2nd ladder control program 600 ... Equipment 1 machine 610 ... Equipment 2 machine F1 ... Step F3 ... Unit block F5 ... Comparison element F7 ... Weighting value F9 ... Block matching degree F10 ... Block number F20 ... Step number F30 ... Processing instruction F40 ... Element F41 ... Element type F43 ... Element ID

Claims (4)

A first ladder control program having at least a plurality of unit blocks including a step having a processing instruction, a type of an element for executing the processing instruction, and an element ID assigned to the element; and a second having at least a plurality of the unit blocks. A collation program that collates with a ladder control program.
The block number assigned to the first block which is the unit block included in the first ladder control program and the block number assigned to the second block which is the unit block included in the second ladder control program are the same. A block determination procedure in which the first block and the second block are compared and compared;
The processing instruction included in the first block, the element type, and the element ID are extracted as comparison elements, and the processing instruction included in the second block, the element type, and the element ID are extracted. Extraction procedure for extracting as a comparison element,
A comparison program for executing a comparison element determination procedure for determining whether or not the comparison element included in the first block matches the comparison element included in the second block.   The comparison element is associated with a weighting value in accordance with the importance of the comparison element, and the first block and the second block are matched based on the determination result in the comparison element determination procedure and the weighting value. The collation program according to claim 1, further comprising a block determination procedure for determining the degree.  If the degree of coincidence falls below a reference value in the determination result in the block determination procedure, the second block having the block number next to the block number assigned to the second block and the first block are newly The collation program according to claim 2, further comprising a block collation procedure as a comparison reference.  4. The collation program according to claim 2, further comprising an output procedure for outputting a determination result in the comparison element determination procedure or a determination result in the block determination procedure.

Images