KR20170127569A - Program diagnostic device, program diagnostic method, and program diagnostic program - Google Patents

Abstract

A control program including an operation command and a conditional instruction; command specification data including a command name of the command, a type of the command, and contents of processing of the command; and search result data in which the result of the search executed for the control program is stored A variable setting unit for setting a target variable, an operation command having a possibility that the value of the target variable may change, a target variable name, a command name of the retrieved operation command, a type of command, An operation search unit for searching for a conditional command for determining a condition for executing an operation command, a variable name of an argument of the retrieved conditional command, a command name of the conditional command, a type of command, A condition search unit for writing the search result data into the search result data and setting an argument of the conditional command as a new target variable; The primary search execution determination section, and provided with a list display list to display the contents of the search result data to.

Description

Program diagnostic device, program diagnostic method, and program diagnostic program

The present invention relates to a program diagnostic apparatus for diagnosing a control program, a program diagnostic method, and a program diagnostic program.

In a control system for controlling a machine in the field of factory automation (FA), a control program is described in a programming language. The programming language is ladder (LD) language or structured text (ST) language (IEC 61131-3, JIS B 3503: 2012).

The control program includes commands and variables. In the case where the value of a certain variable in the control program is different from the assumed value, the following operation has been performed manually to investigate the cause thereof.

The first operation is an operation to go back to the control program and examine the points and conditions that are likely to change the value of the target variable.

The second operation is an operation for simulating the control program to reproduce that the condition is satisfied at the point irradiated in the first operation.

The third operation is an operation of going back to the control program and examining the point and condition satisfying the condition reproduced in the second operation.

Thereafter, the second operation and the third operation were repeated to find the root cause.

However, since it is time and effort to go back and examine the control program manually, it was difficult to specify the cause of the difference of the value of the variable from the assumed value.

As a related art, Japanese Patent Application Laid-Open Publication No. 2001-34870 discloses a technique in which, when an output signal is detected as an abnormal contact, the ladder program is returned from the output signal to the previous step, A ladder program diagnostic method is disclosed (paragraph 0053).

In the following Patent Document 2, a first step of finding a block including an output instruction section capable of manipulating the value of an output instruction section as a search key from among all the blocks in the ladder program, The state of the output instruction section of the block corresponding to the logical operation result of the condition instruction section is judged and the validity judgment as to whether this block actually manipulates the state of the abnormal output instruction section is made A third step of searching all the relays capable of manipulating the state of the output instruction section among the condition instruction sections of the block if the block is legitimate in the second step; A fourth step of repeating the first, second, and third processes with the key, and if the corresponding block is not found in the first process, And a fifth step of outputting a result of the output and outputting a result of the relay in the conditional instruction unit as an error cause when the corresponding relay is not found in the third step, in a ladder sequence type program (4th page to 5th page) are described.

In the following Patent Document 3, the sequence diagram of the sequence diagram acquisition section is obtained, and the selector selects the desired symbol among the operation sequence diagrams, and the upstream connection line associated with the symbol is selected as the connection line A sequence is also described in which a search section sequentially searches for a presence or absence of an output of an operation state and can search for a defective portion in succession even if the operation state changes, ).

Patent Document 1: JP-A-2001-67122 Patent Document 2: JP-A-3-108005 Patent Document 3: JP-A-9-305207

However, in the techniques described in Patent Documents 1 to 3, the user can know the contact which is the cause of the problem, but can not know the command from the contact causing the problem to the contact where the problem occurred. Therefore, it is difficult for the user to grasp the entire shape (image) of the problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to obtain a program diagnostic apparatus which enables a user to easily grasp the overall shape of a problem.

In order to solve the above-described problems and to achieve the object, the present invention is characterized by comprising: a control program including an operation command for changing a value of an argument and a condition command for determining a condition for executing an operation command; The instruction specification data including the instruction name of the instruction, the type of the operation instruction or the condition instruction, and the content of the instruction process, and the search result data in which the result of the search executed for the control program is stored And a storage unit. The present invention includes a variable setting unit for setting a target variable, an operation command for which a value of a target variable is likely to change is searched in a control program, a target variable name and a searched operation An operation retrieval unit that writes the command name of the command, the type of the command, and the contents of the processing into the retrieval result data; and a conditional command that determines a condition for executing the operation command retrieved by the operation retrieval unit, And the command specification data, writes the variable name of the argument of the retrieved condition command, the command name of the retrieved condition command, the type of command and the contents of the processing to the retrieval result data, and sets the argument of the retrieved condition command as a new target variable A search condition determining unit for determining whether or not to search for a search result, And a list display unit for displaying a list of contents of the data.

The program diagnostic apparatus according to the present invention achieves the effect that the user can easily grasp the overall shape of the problem.

1 is a diagram showing a configuration of a control system according to a first embodiment.
2 is a diagram showing the hardware configuration of the control apparatus according to the first embodiment.
3 is a diagram showing the hardware configuration of the engineering tool according to the first embodiment.
4 is a functional block diagram of the engineering tool according to the first embodiment.
5 is a diagram showing command specification data of the engineering tool according to the first embodiment.
6 is a diagram showing search frequency data of the engineering tool according to the first embodiment.
7 is a diagram showing search range data of the engineering tool according to the first embodiment.
8 is a diagram showing search result data of the engineering tool according to the first embodiment.
9 is a diagram showing a project data creation screen of the engineering tool according to the first embodiment.
10 is a flowchart showing the processing of the engineering tool according to the first embodiment.
11 is a flowchart showing the processing of the engineering tool according to the first embodiment.
12 is a flowchart showing the processing of the engineering tool according to the first embodiment.
13 is a diagram showing a program diagnostic screen of the engineering tool according to the first embodiment.
14 is a diagram for explaining a search process of the engineering tool according to the first embodiment.
15 is a diagram for explaining search processing of the engineering tool according to the first embodiment.
16 is a diagram for explaining the search processing of the engineering tool according to the first embodiment.
17 is a diagram showing a program diagnostic screen of the engineering tool according to the first embodiment.
18 is a flowchart showing the processing of the engineering tool according to the first embodiment.
19 is a flowchart showing the processing of the engineering tool according to the first embodiment.

Hereinafter, a program diagnostic apparatus, a program diagnostic method, and a program diagnostic program according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to these embodiments.

Embodiment 1

1 is a diagram showing a configuration of a control system according to Embodiment 1 of the present invention. The control system 1 includes an engineering tool 2, a control device 3, and machines 4 and 5.

The engineering tool 2 creates project data including a control program executed in the control device 3, and transmits the created project data to the control device 3. The control device 3 controls the machines 4 and 5 by executing a control program included in the project data. The control device 3 is a programmable controller (JIS B 3502: 2011, programmable controllers (PLC)).

2 is a diagram showing the hardware configuration of the control apparatus according to the first embodiment. The control device 3 includes a main substrate 3a and sub-substrates 3b and 3c.

The main board 3a includes a CPU (Central Processing Unit) 3a1, a memory 3a2 as a RAM (Random Access Memory), a communication interface 3a3, a bus interface 3a4, and a storage unit 3a5 . The CPU 3a1, the memory 3a2, the communication interface 3a3, the bus interface 3a4, and the storage unit 3a5 are connected via the internal bus B1.

The communication interface 3a3 communicates with the engineering tool 2.

The bus interface 3a4 is a bus bridge circuit that connects the internal bus B1 and the expansion bus B2. The sub-boards 3b and 3c are connected to the main board 3a via the expansion bus B2. The sub-board 3b is connected to the machine 4. [ The sub-substrate 3c is connected to the machine 5.

The storage unit 3a5 stores the project data 24a received from the engineering tool 2. [ An SSD (Solid State Drive) or an HDD (Hard Disk Drive) is exemplified as the storage unit 3a5.

The project data 24a includes a control program 24a1 including an operation command for changing the value of the argument and a condition command for determining a condition for executing the operation command and a control parameter 24a1 for referring to the control parameter 24a1 A device memory 24a3 that defines a working area in the memory 3a2 and a connection relationship between the sub board 3b and the machine 4 and a connection relationship between the sub board 3c and the machine 5 And the connection information 24a4.

The control program 24a1 includes a MAIN program 24a1a and a SUB (sub) program 24a1b. In Embodiment 1, the control program 24a1 is described in a ladder language, but is not limited thereto. Another language in which the control program 24a1 is described is a structured text language.

In the memory 3a2, a plurality of devices defined by the device memory 24a3 are secured. In Embodiment 1, each of a plurality of devices in the memory 3a2 corresponds to a variable of the control program 24a1.

3 is a diagram showing the hardware configuration of the engineering tool according to the first embodiment. The engineering tool 2 according to the first embodiment can be realized by using a computer. The computer includes a CPU 21, a RAM 22, a ROM (Read Only Memory) 23, a storage unit 24, an input unit 25, a display unit 26, a communication interface 27 . The CPU 21, the RAM 22, the ROM 23, the storage unit 24, the input unit 25, the display unit 26 and the communication interface 27 are connected via a bus B. [

The CPU 21 executes the program stored in the ROM 23 and the storage unit 24 while using the RAM 22 as a work area. A program stored in the ROM 23 is a BIOS (Basic Input / Output System) or a UEFI (Unified Extensible Firmware Interface). Examples of the programs stored in the storage unit 24 are an operating system program and an engineering tool program. The storage unit 24 is an SSD or an HDD.

The input unit 25 accepts an operation input from the user. The input unit 25 may be a keyboard or a mouse. The display section 26 displays characters and images. The display section 26 is a liquid crystal display device. The communication interface 27 communicates with the control device 3.

4 is a functional block diagram of the engineering tool according to the first embodiment. The storage unit 24 stores the project data 24a.

The project data 24a includes a control program 24a1 including an operation command for changing the value of the argument and a condition command for determining a condition for executing the operation command and a control parameter 24a1 for referring to the control parameter 24a1 A device memory 24a3 for defining a working area in the memory 3a2 of the control device 3 and a connection relationship between the sub-substrate 3b and the machine 4 of the control device 3, 3 and the connection information 24a4 defining the connection relationship between the sub-board 3c and the machine 5. [

The storage section 24 stores the command specification data 24b including the command name, the operation command or the type of the condition command and the contents of the processing of the command of all the commands that can be described in the control program 24a1.

In the first embodiment, the control program 24a1 is described in a ladder language. Therefore, the instruction specification data 24b includes the command name, the operation command or the type of the conditional instruction and the content of the instruction processing of all the instructions in the ladder language.

5 is a diagram showing command specification data of the engineering tool according to the first embodiment. The command specification data 24b includes an instruction name item 24b1, an instruction type item 24b2, a description inquiry item 24b3, and a note item 24b4.

A row 51 of the command specification data 24b contains information about the " LD " (load) command. The command name " LD " is described in the item of the command name of the line 51. [ The command type "condition" is described in the item of the command type of the row 51 because the LD command is a conditional command.

The description of the operation of the " LD " command is described in the description of the line 51 item. Quot; # 1 is ON " is described in the item of description of the line 51 since the " LD " command is an instruction to determine whether or not the first argument is ON (ON).

The data type of the first argument of the " LD " instruction is described in the column of the note in the row 51. [ Since the first argument of the " LD " instruction is of bit type, a note "bit variable" is described in the column of the note in the row 51. [

A row 52 of the command specification data 24b contains information about an " OUT " (out) command. The command name " OUT " is described in the item of the command name in the line 52. [ Since the OUT command is an operation command in the item of the command type in the line 52, the command type " operation " is described.

The description of the operation of the " OUT " command is described in the explanation of the line 52. Since the " OUT " command is an instruction to turn on the first argument, the comment statement " ON # 1 "

The data type of the first argument of the " OUT " command is described in the column of the note in the row 52. [ Since the first argument of the " OUT " command is of the bit type, the note item of the row 52 describes the note " bit variable ".

A row 53 of the command specification data 24b contains information about an " = " (equal) command. The command name " = " is described in the item of the command name in the line 53. [ The command type "condition" is described in the item of the command type of the line 53 because the "=" command is a conditional command.

The description of the operation of the "=" command is described in the description of the line 53 item. Since the command "=" is an instruction to judge whether the first argument and the second argument are the same, the comment statement "# 1 is the same as # 2" is described in the description line item of the line 53.

The data type of the first argument and the second argument of the " = " command are described in the column of the note in the line 53. [ Since the first argument and the second argument of the " = " command are of the word type, a remarks " word variable "

A row 54 of the command specification data 24b contains information about the " MOV " (MOVE) command. The command name " MOV " is described in the item of the command name in the line 54. [ Since the "MOV" instruction is a conditional instruction, the instruction type "operation" is described in the item of the instruction type of the row 54.

The description of the operation of the "MOV" command is described in the description of the line 54. Since the "MOV" command is a command for transferring the value of the first argument to the second argument, the comment statement "# 1 is sent to # 2" is described in the description of the line 54.

The data type of the first argument and the second argument of the " MOV " command is described in the column of the note in the line 54. [ Since the first argument and the second argument of the " MOV " command are of the word type, the word "word variable" is described in the column of the note in the line 54.

5 shows four rows 51, 52, 53 and 54 for four instructions. In practice, however, the command specification data 24b includes a plurality of lines for all instructions described in the ladder language.

Referring again to FIG. 4, the storage unit 24 stores the search termination condition data 24c describing the termination condition of the search executed for the control program 24a1. The search termination condition data 24c includes the search number data 24c1 and the search range data 24c2.

6 is a diagram showing search frequency data of the engineering tool according to the first embodiment. &Quot; 10 " is described in the search count data 24c1. As a result, the search executed for the control program 24a ends at a maximum of 10 times.

7 is a diagram showing search range data of the engineering tool according to the first embodiment. The search range data 24c2 includes an item of the range leading step number and an item of the range end step number. &Quot; 1 " is described in the item of the range leading step number. &Quot; 100 " is described in the item of the step end step number. Thus, the search performed for the control program 24a1 is limited to the range from the step No. 1 to the step No. 100, and is terminated when the range is out of the range.

Referring again to FIG. 4, the storage unit 24 stores search result data 24d in which the results of search executed for the control program 24a1 are stored.

8 is a diagram showing search result data of the engineering tool according to the first embodiment. The search result data 24d includes a variable name item 24d1, an instruction name item 24d2, an instruction type item 24d3, a description inquiry item 24d4, a program name item 24d5, (24d6) of < / RTI >

The rows 61, 62, 63, and 64 of the search result data 24d will be described in the description of the operation of the engineering tool 2.

Referring again to FIG. 4, the storage unit 24 stores execution data 24e in which values at predetermined timing of all the variables used in the control program 24a1 are stored. That is, the execution data 24e accumulates the values of all variables at a plurality of different timings.

The search result data 24d will be described in the description of the operation of the engineering tool 2.

The CPU 21 executes the engineering tool program stored in the storage unit 24. [ Thereby, the engineering tool part 21a including the project data creation part 21a1 and the program diagnosis part 21a2 is realized.

The project data creating unit 21a1 creates the project data 24a and transmits it to the control device 3. [

9 is a diagram showing a project data creation screen of the engineering tool according to the first embodiment. The project data creating unit 21a1 displays the project data creating screen 30 on the display unit 26. [

The project data creation screen 30 has a control program creation column 30a. In Fig. 9, a MAIN program 24a1a is created in the control program creation column 30a.

The MAIN program 24a1a includes rows 41, 42, 43, 44, 45, and 46.

The row 41 includes a conditional instruction 41a and an operation instruction 41b. The conditional instruction 41a is " LD M0 ". &Quot; M0 " is a variable. In Embodiment 1, the combination of the alphabetical letter " M " and the numerical value indicates a bit type variable.

The operation command 41b is " INC D0 ". Of these, "D0" is a variable. In Embodiment 1, the combination of the alphabetic character " D " and the numerical value indicates a variable of the word type. The " INC " (increment) instruction is an instruction to increment the first argument by 1. That is, the operation command 41b is an instruction for incrementing the variable " D0 "

Row 42 includes conditional instruction 42a and operation instruction 42b. The conditional instruction 42a is " LD M100 ". Of these, "M100" is a variable.

The operation command 42b is " MOV D0 D10 ". &Quot; D10 " The " MOV " command is a command to transfer the value of the first argument to the second argument. That is, the operation command 42b is a command for transferring the value of the variable " D0 " to the variable " D10 ".

The row 43 includes a conditional instruction 43a and an operation instruction 43b. The conditional instruction 43a is " LD M200 ". Of these, "M200" is a variable.

The operation command 43b is " OUT Y0 ". Of these, "Y0" is a variable. In Embodiment 1, the combination of the alphabetic character " Y " and the numerical value indicates a bit type variable. That is, the operation command 43b is an instruction to turn on the variable " Y0 ".

The row 44 includes a conditional instruction 44a and an operation instruction 44b. The conditional instruction 44a is " = D10 K10000 ". &Quot; K10000 " is a constant " 10000 ". That is, the conditional instruction 44a is a command for judging whether the value of the variable " D10 " is equal to the constant " 10000 ".

The operation command 44b is " MOV K15 D20 ". Among them, "K15" is a constant "15" and "D20" is a variable. That is, the operation command 44b is a command for transmitting the constant " 15 " to the variable " D20 ".

Row 45 includes conditional instruction 45a and operation instruction 45b. The conditional instruction 45a is OR (logical sum) of "LD M10", "LD M11" and "LD M12". Among these, "M10", "M11" and "M12" are variables. That is, the conditional instruction 45a is a command for determining the logical sum of the value of the variable "M10", the value of the variable "M11", and the value of the variable "M12".

The operation command 45b is " MOV D20 D30 ". The "D30" of these is a variable. That is, the operation command 45b is an instruction to transfer the value of the variable " D20 " to the variable " D30 ".

Line 46 is a termination command.

Referring again to FIG. 4, the program diagnosis unit 21a2 includes a variable setting unit 21a2a for setting a target variable. The variable setting unit 21a2a can receive the variable input by the user into the input unit 25 and set it as a target variable. In addition, the variable setting unit 21a2a can receive the variable in question from the control device 3 and set it as the target variable.

The program diagnosis unit 21a2 searches the control program 24a1 for an operation command that may change the value of the target variable, collates the retrieved operation command with the command specification data 24b, And an operation retrieving unit 21a2b for writing the command name, the type of command, and the content of the processing in the retrieval result data 24d.

The program diagnosis unit 21a2 searches the control program 24a1 for a conditional command for determining a condition for executing the operation command retrieved from the operation retrieving unit 21a2b, collates the retrieved conditional command with the command specification data 24b, A condition search unit (not shown) for writing the variable name of the argument of the retrieved condition command, the command name of the retrieved condition command, the type of command and the contents of the processing in the retrieval result data 24d and setting the argument of the retrieved condition command as a new target variable 21a2c.

The program diagnosis unit 21a2 includes a search determination unit 21a2d that causes the operation search unit 21a2b and the condition search unit 21a2c to execute the search again.

The program diagnosis unit 21a2 includes a list display unit 21a2e for listing the contents of the search result data 24d.

The program diagnosis unit 21a2 scans the memory 3a2 of the control device 3 at a predetermined timing to acquire the values of all the variables used in the control program 24a1 and write the values of the variables used in the control program 24a1 into the execution data 24e And a scanning unit 21a2f.

The predetermined timing is as follows.

The first example is a constant time lapse. For a given time, one second is exemplified. As a result, the values of all the variables are stored in the execution data 24e every predetermined period of time.

The second example is when the control device 3 receives a notification that a problem has occurred. Thus, in the execution data 24e, values of all variables when a problem occurs in the control device 3 are accumulated.

The third example is when the user inputs an instruction to execute the scan to the input unit 25. As a result, values of all variables at the timing desired by the user are accumulated in the execution data 24e.

10 is a flowchart showing the processing of the engineering tool according to the first embodiment.

The scanning unit 21a2f executes the processing shown in Fig. 10 at a predetermined timing.

In step S10, the scanning unit 21a2f scans the memory 3a2 of the control device 3 to obtain the values of all variables used in the control program 24a1.

In step S12, the scanning unit 21a2f writes the values of all the variables obtained in step S10 into the execution data 24e, and ends the processing.

Referring again to FIG. 4, the program diagnosis unit 21a2 calculates the values of all variables used in the control program 24a1 by executing the control program 24a1 by simulation, and writes the values of the variables in the execution data 24e (21a2g).

As a result, the values of all the variables used in the control program 24a1 are stored in the execution data 24e even if the control device 3 is not operated. Therefore, the program diagnosis unit 21a2 can diagnose the problem of the control program 24a1 without operating the control device 3. [

11 is a flowchart showing the processing of the engineering tool according to the first embodiment.

The simulation unit 21a2g executes the process shown in Fig. 11 when the user inputs an instruction to execute the simulation on the input unit 25. Fig.

The simulation unit 21a2g calculates the values of all the variables used in the control program 24a1 by executing the control program 24a1 by simulation in step S20.

In step S22, the simulation unit 21a2g writes the values of all the variables calculated in step S20 into the execution data 24e, and ends the processing.

12 is a flowchart showing the processing of the engineering tool according to the first embodiment.

The variable setting unit 21a2a sets the target variable in step S100.

13 is a diagram showing a program diagnostic screen of the engineering tool according to the first embodiment. The variable setting unit 21a2a displays the program diagnosis screen 70 on the display unit 26. [

The program diagnostic screen 70 has a variable setting field 71. In Fig. 13, the variable " D20 " is set to the target variable 72 in the variable setting column 71. [

The variable setting unit 21a2a can receive the variable input by the user into the input unit 25 and set it to the target variable 72. [ The variable setting unit 21a2a can receive the variable in question from the control device 3 and set the parameter in the target variable 72. [

Referring again to Fig. 12, the motion search section 21a2b searches the control program 24a1 for the motion command described in the argument in the target variable 72 in step S102.

The operation retrieving unit 21a2b can retrieve an operation command from the control program 24a1 by obtaining the command type of the command by collating the command in the control program 24a1 with the command specification data 24b.

The search result by the motion search section 21a2b may be a plurality of points.

14 is a diagram for explaining a search process of the engineering tool according to the first embodiment.

In Fig. 14, the values described at the bottom of each variable are the values of the respective variables at any timing, and are the values stored in the execution data 24e.

Assuming that the program diagnostic unit 21a2 uses the values of all scanned variables when it receives a notification of the occurrence of a problem from the control unit 3, The control program 24a1 can be diagnosed based on the values of all the variables. Thereby, the program diagnosis section 21a2 can diagnose the problem of the control program 24a1 at the timing at which the problem occurred in the control device 3. [

Assuming that the program diagnostic unit 21a2 uses the values of all the variables in the former time than when the notification of the occurrence of the problem is received from the control device 3, The diagnosis of the control program 24a1 can be performed based on the values of all the variables at the timing before the occurrence of the failure. As a result, the program diagnosis unit 21a2 can diagnose the problem of the control program 24a1 at the timing before the occurrence of a problem in the control apparatus 3.

The variable " D20 " set to the target variable 72 is described in the second argument 44b1 of the operation command 44b.

The motion search section 21a2b finds that the variable "D20" set in the target variable 72 is described in the second argument 44b1 of the motion command 44b in step S102. The operation retrieving unit 21a2b obtains the command type "operation" of the command name "MOV" by collating the command name "MOV" of the operation command 44b with the command specification data 24b. Therefore, the operation retrieving unit 21a2b can retrieve the operation instruction 44b from the control program 24a1.

The operation retrieving unit 21a2b may also obtain the operation command by graphically analyzing the control program 24a1 instead of checking the command name and the command specification data 24b.

Specifically, when two instructions are described in one row, as in the rows 41, 42, 43 and 44 of the control program 24a1 shown in Fig. 9, the motion search section 21a2b sets 2 The command of the right side of the command, that is, the command of the downstream side of the control program 24a1 may be acquired as an operation command.

When more than two instructions are described in one row, as in the row 45 of the control program 24a1 shown in Fig. 9, the motion search section 21a2b first determines whether the plurality of instructions are to be wired And finds the point 45a1 to which an OR connection is made. The motion search section 21a2b may acquire the instruction 45b on the right side of the point 45a1, that is, on the downstream side of the control program 24a1 as an operation command.

Thereby, the motion search section 21a2b can search for the motion command from the control program 24a1 without collating the command name and the command specification data 24b.

Referring again to Fig. 12, in step S104, the motion search section 21a2b searches among the motion commands searched in step S102 for motion commands likely to change the value of the target variable.

The variable " D20 " set to the target variable 72 is described in the second argument 44b1 of the operation command 44b. The command name " MOV " of the operation command 44b is an instruction to transfer the value of the first argument to the second argument.

Therefore, the operation retrieving unit 21a2b can search the control program 24a1 for the operation command 44b in which the value of the variable " D20 " set in the target variable 72 may change in step S104 .

In step S106, the motion search unit 21a2b collates the motion command searched in step S104 with the command specification data 24b, and writes the information based on the search result in step S104 in the search result data 24d .

Referring back to Fig. 8, the motion search section 21a2b creates a row (61) in step S106. The operation retrieving unit 21a2b writes the variable name "D20", the command name "MOV" and the command type "operation" in the items (24d1, 24d2, and 24d3)

The operation retrieving unit 21a2b collates the operation instruction 44b retrieved in step S104 with the description inquiry item 24b3 of the instruction specification data 24b. The first argument of the operation instruction 44b is the constant " K15 ", and the second argument is the variable " D20 ". Therefore, the operation retrieving unit 21a2b creates a comment sentence " K15 is sent to D20 " and writes it in the item 24d4 of the line 61. [

The operation retrieving unit 21a2b writes the program name " MAIN " including the operation command 44b in the item 24d5 of the line 61. [

The operation command 44b is the eleventh step of the MAIN program 24a1a. Therefore, the operation command unit 21a2b writes the step number " 11 " in the item 24d6 of the row 61. [

Referring again to Fig. 12, the condition retrieval unit 21a2c retrieves, from the control program 24a1, a conditional command for determining a condition for executing the operation command retrieved by the operation retrieval unit 21a2b in step S108 .

The condition retrieval unit 21a2c can retrieve the conditional instruction from the control program 24a1 by collating the instruction in the control program 24a1 with the instruction specification data 24b and acquiring the instruction type of the instruction.

The search result by the condition searching unit 21a2c may be a plurality of points.

Further, the condition retrieving unit 21a2c may acquire the operation command by graphically analyzing the control program 24a1 instead of checking the command name and the command specification data 24b.

Concretely, when two instructions are described in one row, as in the rows 41, 42, 43 and 44 of the control program 24a1 shown in Fig. 9, the condition retrieving unit 21a2c sets 2 The command on the left side of the command, that is, the command on the upstream side of the control program 24a1, may be acquired as an operation command.

When more than two instructions are described in one row, as in the row 45 of the control program 24a1 shown in Fig. 9, the motion search section 21a2b first determines whether the plurality of instructions are to be wired And finds the point 45a1 to which an OR connection is made. The motion search section 21a2b may acquire the instruction 45a on the left side of the point 45a1, that is, on the upstream side of the control program 24a1 as an operation command.

Thereby, the condition retrieving unit 21a2c can retrieve the conditional instruction from the control program 24a1 without collating the instruction name and the instruction specification data 24b.

Referring again to Fig. 14, a conditional instruction 44a is described on the left side of the operation command 44b, that is, on the upstream side of the MAIN program 24a1a.

Therefore, the condition searching unit 21a2c can search the control program 24a1 for the conditional instruction 44a for determining the condition for executing the operation command 44b in step S108.

12, the condition retrieval unit 21a2c collates the conditional command retrieved in step S108 with the command specification data 24b in step S110, and stores information based on the retrieval result in step S108 in the retrieval result And writes it into the data 24d.

Referring back to Fig. 8, the condition retrieval unit 21a2c creates a line 62 in step S110. The condition retrieving unit 21a2c then writes the variable name "D10", the command name "=" and the command type "condition" in the items (24d1, 24d2, and 24d3)

The condition retrieval unit 21a2c collates the conditional instruction 44a retrieved in step S108 with the explanation inquiry item 24b3 of the instruction specification data 24b. The first argument of the conditional instruction 44a is the variable " D10 ", and the second argument is the constant " K10000 ". Therefore, the condition retrieval unit 21a2c creates the comment "D10 equals K10000" and writes it in the item 24d4 of the line 62. [

The condition retrieving unit 21a2c writes the program name " MAIN " including the conditional instruction 44a in the item 24d5 of the line 62. [

The conditional instruction 44a is the eighth step of the MAIN program 24a1a. Therefore, the conditional instruction unit 21a2c writes the step number " 8 " in the item 24d6 of the row 62. [

Referring again to FIG. 12, the condition retrieval unit 21a2c sets the argument of the conditional command retrieved in step S110 as a new target variable 72 in step S112.

A plurality of new target variables 72 set by the condition search unit 21a2c may be used. The condition retrieval unit 21a2c does not set a new target variable 72 when the control program 24a1 can not go any further backwards.

15 is a diagram for explaining search processing of the engineering tool according to the first embodiment.

As shown in Fig. 15, the conditional instruction 44a includes the first argument 44a1 "D10" and the second argument "K10000". However, the second argument " K10000 " is a constant and not a variable. Thus, the condition retrieving unit 21a2c sets the first argument 44a1 "D10" as a new target variable 72 in step S112.

Referring again to Fig. 12, the search judgment unit 21a2d judges whether or not the search end condition is satisfied in step S114. The search termination conditions are as follows.

The first example is a case where a new target variable 72 is not set in step S112. That is, the control program 24a1 can not go back more than that.

The second example is the case where the number of repetitions of retrieval from step S102 to step S112 by the operation retrieval section 21a2b and the condition retrieval section 21a2c reaches the number of times described in the retrieval number data 24c1.

Thereby, the program diagnosis unit 21a2 achieves the effect that it is possible to prevent the search from being terminated and to ensure that the search is stopped, that is, to ensure the stopping of the search. The program diagnosis unit 21a2 can limit the search range even when the scale of the control program 24a1 is large so that the effect of suppressing the number of steps for specifying the cause of the problem of the control program 24a1 .

The third example is the case where the new target variable 72 set in step S112 by the condition searching unit 21a2c is out of the range of the step number described in the search range data 24c2.

Thereby, the program diagnosis unit 21a2 achieves the effect that the stoppability of retrieval is ensured. The program diagnosis unit 21a2 can limit the search range even when the control program 24a1 has a large scale, and thus can reduce the number of steps for specifying the cause of the problem of the control program 24a1 .

The search determination unit 21a2d can determine the OR (logical sum) of a plurality of search termination conditions.

If the search condition determining unit 21a2d determines in step S114 that the search condition is not satisfied (No), the process proceeds to step S102.

16 is a diagram for explaining the search processing of the engineering tool according to the first embodiment.

As shown in Fig. 16, the operation command 42b includes a first argument " D0 " and a second argument 42b1 " D10 ".

The motion search section 21a2b finds that the variable "D10" set in the target variable 72 is described in the second argument 42b1 of the motion command 42b in step S102 and step S104. The operation retrieving unit 21a2b obtains the command type "operation" of the command name "MOV" by collating the command name "MOV" of the operation command 42b with the command specification data 24b. Therefore, the operation retrieving unit 21a2b can retrieve the operation instruction 42b from the control program 24a1.

Referring back to Fig. 8, the motion search section 21a2b creates a row (63) in step S106. The operation retrieving unit 21a2b writes the variable name "D0", the command name "MOV" and the command type "operation" in the items (24d1, 24d2 and 24d3) of the row (63).

The operation retrieving unit 21a2b collates the operation instruction 42b retrieved in step S104 with the explanation instruction item 24b3 of the instruction specification data 24b. The first argument of the operation command 42b is the variable " D0 ", and the second argument is the variable " D10 ". Therefore, the operation retrieving unit 21a2b creates the comment "D0 is sent to D10" and writes it in the item 24d4 of the line 63. [

The operation retrieving unit 21a2b writes the program name " MAIN " including the operation command 42b in the item 24d5 of the line 63. [

The operation command 42b is the fourth step of the MAIN program 24a1a. Therefore, the operation command unit 21a2b writes the step number " 4 " in the item 24d6 of the line 63. [

On the left side of the operation command 42b, that is, on the upstream side of the MAIN program 24a1a, a conditional instruction 42a is described.

Therefore, the condition searching unit 21a2c can search the control program 24a1 for the conditional instruction 42a for determining the condition for executing the operation command 42b in step S108.

In step S110, the condition retrieval unit 21a2c collates the conditional command retrieved in step S108 with the command specification data 24b, and writes the information based on the retrieval result in step S108 in the retrieval result data 24d .

Referring back to Fig. 8, the condition retrieving unit 21a2c creates a line 64 in step S110. Then, the condition retrieval unit 21a2c writes the variable name "M100", the command name "LD" and the command type "condition" in the items (24d1, 24d2, and 24d3)

The condition retrieval unit 21a2c collates the conditional instruction 42a retrieved in step S108 with the explanation inquiry item 24b3 of the instruction specification data 24b. The first argument of the conditional instruction 42a is the variable " M100 ". Therefore, the condition retrieval unit 21a2c creates a comment message " M100 is ON ", and writes it in the item 24d4 of the row 64. [

The condition retrieving unit 21a2c writes the program name " MAIN " including the conditional instruction 42a in the item 24d5 of the line 64. [

The conditional instruction 42a is the third step of the MAIN program 24a1a. Therefore, the conditional instruction unit 21a2c writes the step number " 3 " in the item 24d6 of the line 64. [

The conditional instruction 42a includes the first argument " M100 ". Thus, the condition retrieving unit 21a2c sets the first argument " M100 " to the new target variable 72 in step S112.

Referring again to Fig. 12, if the search condition determining unit 21a2d determines in step S114 that the search condition is satisfied (Yes), the process proceeds to step S116.

Referring again to Fig. 16, an operation command including the target variable 72 " M100 " is not present in the control program 24a1.

Therefore, the search determination unit 21a2d determines that the search condition is satisfied in step S114 (Yes), and proceeds to step S116.

Referring again to Fig. 12, the list display section 21a2e displays the content of the search result data 24d on the display section 26 in step S116.

17 is a diagram showing a program diagnostic screen of the engineering tool according to the first embodiment. The list display section 21a2e displays a list of the contents of the search result data 24d in the list display field 80 of the program diagnosis screen 70. [

The list display field 80 includes a program name item 81, a step number item 82, a variable name item 83, an instruction name item 84, a command type item 85, And an inquiry item (86).

The list display section 21a2e displays the contents of the rows 61, 62, 63 and 64 of the search result data 24d in the rows 91, 92, 93 and 94, respectively.

In this manner, the program diagnosis unit 21a2 not only displays the contents of the command causing the problem and the contents of the command in which the problem has occurred, which are displayed in the row 91, displayed in the row 94, And the contents of the commands involved in the command between the command causing the trouble and the command having the problem, which are displayed in the line 92, can be displayed together.

Thereby, the program diagnosis unit 21a2 achieves the effect that the user can easily grasp the overall shape between the command causing the problem and the command in which the problem has occurred.

18 is a flowchart showing the processing of the engineering tool according to the first embodiment.

The list display unit 21a2e displays the instruction 44b, 44a, 42b, or 42a corresponding to the step number in the item 82a of the selected row when the row 91, 92, 93 or 94 is selected in step S200 Display.

Thereby, the program diagnosis unit 21a2 achieves the effect that the user can immediately check the desired command.

The list display field 80 includes a filter condition input field 81a for inputting the filter condition of the program name, a filter condition input field 82a for inputting the filter condition of the step number, A filter condition input field 83a for inputting a filter condition of an instruction name, a filter condition input field 85a for inputting a filter condition of a command type, And a condition input field 86a.

19 is a flowchart showing the processing of the engineering tool according to the first embodiment.

The list display unit 21a2e displays a list of the filter conditions entered in the filter condition input field 84a in accordance with the filter conditions entered in the rows 91, 92, 93, and 94 of the search result data 24d ) Are displayed in a list. For example, when " MOV " is inputted to the filter condition input field 84a, the list display section 21a2e displays only the rows 91 and 93.

Thereby, the program diagnosis unit 21a2 achieves the effect that the user can reduce the number of steps for specifying the cause of the problem by narrowing the range of the command related to the problem.

Also, the operation retrieving unit 21a2b can obtain the instruction type "operation" of the instruction name by collating the instruction name and the instruction specification data 24b.

Thereby, the motion search section 21a2b can search for the motion command from the control program 24a1.

The condition retrieval unit 21a2c can obtain the command type "condition" of the command name by collating the command name with the command specification data 24b.

Thereby, the condition retrieval unit 21a2c can retrieve the conditional instruction from the control program 24a1.

The storage unit 24 stores the search termination condition data 24c describing the termination condition of the search executed for the control program 24a1. If the search judgment unit 21a2d judges that the search satisfies the termination condition, the search judgment unit 21a2d terminates the search by the action search unit 21a2b and the condition search unit 21a2c.

Thereby, the program diagnosis unit 21a2 achieves the effect that the stoppability of retrieval is ensured. In addition, the search determination unit 21a2d can limit the search range even when the control program 24a1 has a large scale. Therefore, the program diagnosis unit 21a2 achieves the effect of suppressing the number of steps for specifying the cause of the problem of the control program 24a1.

The storage unit 24 stores execution data 24e in which values at predetermined timing of all the variables used in the control program 24a1 are accumulated.

The scanning unit 21a2f scans the memory 3a2 of the control device 3 at a predetermined timing to acquire the values of all the variables used in the control program 24a1 and writes them into the execution data 24e .

Thus, if the program diagnosis unit 21a2 uses the values of all the scanned variables when it receives a notification of the occurrence of a problem from the control unit 3, the control unit 3 The control program 24a1 can be diagnosed on the basis of the values of all the variables at the timing at which it occurred. Thereby, the program diagnosis section 21a2 can diagnose the problem of the control program 24a1 at the timing at which the problem occurred in the control device 3. [

If the program diagnosis unit 21a2 uses all the values of the variables in the former than the time when the notice of the occurrence of the problem is received from the control unit 3, The control program 24a1 can be diagnosed on the basis of the values of all the variables at the previous timing than when it occurred. As a result, the program diagnosis unit 21a2 can diagnose the problem of the control program 24a1 at the timing before the occurrence of a problem in the control apparatus 3.

The simulation unit 21a2g calculates the values of all the variables used in the control program 24a1 by executing the control program 24a1 by simulation and writes the values of the variables in the execution data 24e.

Thereby, the program diagnosis section 21a2 can diagnose the problem of the control program 24a1 without operating the control device 3. [

The configuration shown in the above embodiments represents one example of the content of the present invention and can be combined with other known technologies and a part of the configuration can be omitted or changed without departing from the gist of the present invention Do.

1: Control system 2: Engineering tool
3: Control device 4, 5: Machine
21: CPU 21a1: Project data creation unit
21a2: Program diagnosis section 21a2a: Variable setting section
21a2b: motion search unit 21a2c: condition search unit
21a2d: search judgment unit 21a2e: list display unit
21a2f: Scan section 21a2g: Simulation section
24: storage section 24a: project data
24a1: Control program 24b: Command specification data
24c: search end condition data 24d: search result data
24e: Execution data

Claims (10)

A control program that includes an operation command for changing a value of an argument and a conditional command for determining a condition for executing the operation command; And storage means for storing search result data in which a result of search executed for the control program is accumulated;
A variable setting unit for setting a target variable,
Searching the control program for the operation command which is likely to change the value of the target variable, verifying the retrieved operation command with the command specification data, and comparing the target variable name and the command name of the retrieved operation command, An operation search unit for writing the contents of the type and the process into the search result data,
Searching the control program for a condition command for determining a condition for executing the operation command retrieved by the operation retrieving unit, collating the retrieved condition command with the command specification data, A condition search unit that writes the command name, the command type, and the process contents of the conditional command searched in the search result data, and sets an argument of the searched conditional command as a new target variable;
A search determination unit that causes the operation search unit and the condition search unit to execute the search again,
And a list display unit for displaying a list of the contents of the search result data. The method according to claim 1,
Wherein the operation searching unit searches the control program for the operation command by collating the command in the control program with the command specification data to acquire the command type of the command. The method according to claim 1,
Wherein the condition searching unit searches the control program for the condition command by collating an instruction in the control program with the instruction specification data to acquire the instruction type of the instruction. The method according to claim 1,
Wherein the storage unit further stores search termination condition data describing an end condition of search executed for the control program,
Wherein the search and determination unit terminates the search by the operation search unit and the condition search unit when it is determined that the search performed by the operation search unit and the condition search unit satisfies the end condition, And a program diagnostic apparatus for executing a search in the operation search section and the condition search section again when it is determined that the search executed by the condition search section does not satisfy the termination condition. The method of claim 4,
Wherein the search termination condition data is data of the number of searches by the operation search unit and the condition search unit or data of a search range of the control program. The method according to claim 1,
Wherein the list display unit displays a list of contents of data matching the filter condition among the search result data when a variable name or a command name of a searched condition command, a command type, Program diagnostic device. The method according to claim 1,
Wherein the storage further stores execution data in which values at predetermined timings of all variables used in the control program are stored,
Further comprising a scan unit that scans a memory of a control device that executes the control program to acquire values of all variables used in the control program and write the values of the variables in the execution data at the predetermined timing Program diagnostic device. The method of claim 7,
Further comprising a simulation unit for calculating the value of all variables used in said control program by executing said control program by simulation and writing said value to said execution data. A control program that includes an operation command for changing a value of an argument and a conditional command for determining a condition for executing the operation command; And a storage unit for storing instruction specification data including contents of processing of instructions and search result data in which a result of a search executed for the control program is recorded,
A variable setting step of setting a target variable,
Searching the control program for the operation command which is likely to change the value of the target variable, verifying the retrieved operation command with the command specification data, and comparing the target variable name and the command name of the retrieved operation command, Type and processing contents into the search result data;
Searching the control program for a condition instruction for determining a condition for executing the operation command retrieved in the operation retrieving step, collating the retrieved condition command with the command specification data, A condition search step of writing the command name, the type of command and the contents of the search of the retrieved conditional command into the retrieval result data, and setting an argument of the retrieved conditional command as a new target variable;
A search determining step of performing the search again in the operation searching step and the condition searching step;
And a list display step of displaying a list of the contents of the search result data. A control program that includes an operation command for changing a value of an argument and a conditional command for determining a condition for executing the operation command; And a storage unit for storing search result data in which a result of search executed for the control program is recorded, the program comprising:
A variable setting step of setting a target variable,
Searching the control program for the operation command which is likely to change the value of the target variable, verifying the retrieved operation command with the command specification data, and comparing the target variable name and the command name of the retrieved operation command, Type and processing contents into the search result data;
Searching the control program for a condition instruction for determining a condition for executing the operation command retrieved in the operation retrieving step, collating the retrieved condition command with the command specification data, A condition search step of writing the command name, the type of command and the contents of the search of the retrieved conditional command into the retrieval result data, and setting an argument of the retrieved conditional command as a new target variable;
A search determining step of performing the search again in the operation searching step and the condition searching step;
And a list display step of displaying contents of the search result data in a list.

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