WO2023248478A1

WO2023248478A1 - Information processing device

Info

Publication number: WO2023248478A1
Application number: PCT/JP2022/025380
Authority: WO
Inventors: 大三橋
Original assignee: ファナック株式会社
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2023-12-28

Abstract

The purpose of the present invention is to prevent programming errors such as omitting to assign or refer parameters in function blocks and thereby prevent accidents due to unintended behavior.　This information processing device is provided with: a function block information acquisition unit that acquires a function block definition and an instance name from a sequence program; a function block instance name search unit that searches the sequence program for locations where the instance name acquired by the function block information acquisition unit is used; a function block analysis unit that analyzes access conditions including at least either calling positions for the instance defined by the instance name, parameter assignment positions, or parameter reference positions on the basis of the acquired function block definition and the results of the search by the function block instance name search unit; and a function block information display control unit that displays the results of the analysis by the function block analysis unit on a display unit.

Description

information processing equipment

The present invention relates to an information processing device.

PLC (Programmable Logic Controller) programs are standardized by IEC61131-3. IEC61131-3 uses function blocks as a means of converting programs into components.
For example, a technique is known that automatically edits a function block instance by modifying the function block definition. For example, see Patent Document 1.
In addition, in a function block, the methods of assigning and referencing parameter values are: (1) assigning and referencing parameters when calling an instance, (2) separating assigning and referencing parameters (i.e., assigning and referencing parameters separately (i.e., at a location other than when calling an instance). There are four types: (3) setting initial values for parameters in the function block type declaration (omitted when calling), and (4) parameter assignment without reference.
FIGS. 10A to 10D are diagrams showing examples of sequence programs that perform each of the four methods of assigning and referencing parameter values. As shown in FIGS. 10A to 10D, a sequence program includes a function block definition section that defines function blocks, a variable declaration section that declares instances (variables) whose data type is the defined function block, and an "instance name+()" and calls an assignment process or a reference process.
(1) In the method of assigning and referencing parameters when calling an instance, as shown in FIG. Reference processing for “OUT” is performed.
(2) In the method of separate assignment and separate reference of parameters, as shown in FIG. After "fbinst" is called, the parameter "OUT" is referenced.
(3) In the method of setting initial values for parameters in the function block type declaration, as shown in Figure 10C, parameters "IN1", "IN2", and "OUT" are set to "1" and "OUT" respectively in the function block definition section, as shown in Figure 10C. Initial values of "2" and "0" are set and initialization is performed.
(4) In the method without parameter assignment or reference, as shown in FIG. 10D, no parameter assignment or reference is performed in the program section when calling the instance "fbinst" and before and after calling the instance "fbinst". . Even in this case, no error or warning occurs according to IEC61131-3.

Japanese Patent Application Publication No. 2009-9462

By the way, as shown on the right side of FIG. 11, for example, when adding the shaded parameter "IN3" to the function block definition section of a sequence program, all instances of that definition type are added to the function block definition section of the sequence program. A common solution is to add assignment (reference) processing starting from "fbinst.IN3" for parameter "IN3". However, even if you forget to add the assignment (reference) process for "fbinst.IN3" to the parameter "IN3" in the program section, the parameter "IN3" can be assigned ( The IEC61131-3 standard allows calling an instance without processing it (reference), so a programming mistake in which assignment (reference) processing is forgotten will not be detected by the compiler as an error. Therefore, running the sequence program may cause an unexpected accident. In addition, it is necessary to check whether there are any omissions, but the larger the sequence program, the more likely it is that omissions will occur, placing a burden on the programmer to deal with and check.

Therefore, it is desired to prevent programming errors such as omissions in parameter substitution and omissions in function blocks, and to prevent accidents due to unintended behavior.

One aspect of the information processing device of the present disclosure includes a function block information acquisition unit that acquires a function block definition and an instance name from a sequence program, and use of the instance name acquired by the function block information acquisition unit from the sequence program. Based on the function block instance name search unit that searches for a location, the function block definition acquired by the function block information acquisition unit, and the search result of the function block instance name search unit, a function block analysis unit that analyzes an access situation including at least one of an instance call position, a parameter assignment position, or a parameter reference position; and a function block information display that displays the analysis results of the function block analysis unit on a display unit. A control unit.

According to one aspect, it is possible to prevent programming errors such as omissions in parameter substitution and omissions in reference to function blocks, and to prevent accidents due to unintended behavior.

1 is a diagram of a functional block configuration of a PLC programming device according to a first embodiment; FIG. It is a figure which shows an example of the read sequence program. It is a figure which shows an example of the display screen of an analysis result. It is a flowchart explaining analysis processing of a PLC programming device. It is a figure showing an example of composition of a PLC programming device concerning a 2nd embodiment. It is a figure which shows an example of the setting screen of display/hide of an alert. It is a figure showing an example of composition of a PLC programming device concerning a 3rd embodiment. It is a figure which shows an example of the display screen of an analysis result. It is a figure showing an example of an editing screen. FIG. 3 is a diagram illustrating an example of a sequence program that assigns and references parameters when calling an instance. FIG. 2 is a diagram illustrating an example of a sequence program that separately assigns and references parameters. FIG. 3 is a diagram illustrating an example of a sequence program that sets initial values for parameters in a function block type declaration. FIG. 2 is a diagram illustrating an example of a sequence program without parameter substitution or reference. FIG. 3 is a diagram illustrating an example of adding parameters to a function block definition section of a sequence program.

The first to third embodiments will be described in detail with reference to the drawings.
Here, each embodiment reads a selected sequence program, acquires a function block definition and an instance name from the read sequence program, searches the read sequence program for a usage part of the instance name, and retrieves the function block definition and instance name from the read sequence program. A common configuration is that the access situation including at least one of the instance invocation position, parameter assignment position, or parameter reference position is analyzed based on the definition and the instance name search result, and the analysis result is displayed.
However, in the first embodiment, all alerts in the analysis results are displayed. On the other hand, the second embodiment differs from the first embodiment in that display/non-display of alerts is selected for each parameter based on user input from among all alerts. Further, in the third embodiment, when the access status displayed based on the user's input is selected, the screen transitions to an editing screen for editing the part of the selected access status, which is different from the first and second embodiments. It differs from
In the following, first, the first embodiment will be described in detail, and then, in the second and third embodiments, particularly the parts that are different from the first embodiment will be described.

<First embodiment>
FIG. 1 is a diagram showing a functional block configuration of a PLC programming device as an information processing device according to a first embodiment.
The PLC programming device 1 is a computer, tablet terminal, or the like known to those skilled in the art, and may be directly connected to a PLC (not shown) via a connection interface (not shown). Further, the PLC programming device 1 may be connected to a PLC (not shown) via a network (not shown) such as a LAN (Local Area Network) or the Internet. In this case, the PLC programming device 1 may include a communication unit (not shown) for communicating with a PLC (not shown) through such a connection.
As shown in FIG. 1, the PLC programming device 1 includes a CPU 10, a storage section 20, an input section 30, and a display section 40.

The input unit 30 is an input device such as a keyboard, a mouse, or a touch panel disposed on a display unit 40 (described later), and accepts input from the user.

The display unit 40 is a display device such as an LCD (Liquid Crystal Display), and displays a display screen that displays information regarding the function block based on display instructions from the function block information display control unit 140, which will be described later.

The storage unit 20 is, for example, an SSD (Solid State Drive) or an HDD (Hard Disk Drive), and stores n sequence programs P1 to Pn (n is an integer of 2 or more) together with the OS and various software.
Note that each of the sequence programs P1 to Pn includes a function block definition section, a variable declaration section, and a program section, similar to the sequence programs shown in FIGS. 10A to 10D.

The control unit 10 includes a CPU, ROM, RAM, CMOS memory, etc., which are configured to be able to communicate with each other via a bus, which are well known to those skilled in the art.
The CPU is a processor that controls the PLC programming device 1 as a whole. The CPU reads the system program and application program stored in the ROM via the bus, and controls the entire PLC programming device 1 according to the system program and application program. As a result, as shown in FIG. 1, the control unit 10 realizes the functions of the function block information acquisition unit 110, function block instance name search unit 120, function block analysis unit 130, and function block information display control unit 140. It is composed of Various data such as temporary calculation data and display data are stored in the RAM. The CMOS memory is backed up by a battery (not shown) and is configured as a nonvolatile memory that maintains its storage state even when the power to the PLC programming device 1 is turned off.

The function block information acquisition unit 110 acquires a function block definition and an instance name from a sequence program Pi selected from among the n sequence programs P1 to Pn based on the user's input via the input unit 30, for example. i is an integer from 1 to n).
Specifically, the function block information acquisition unit 110 reads the selected sequence program Pi.
FIG. 2 is a diagram showing an example of the read sequence program Pi. Note that FIG. 2 also shows the number of lines in the program section of the sequence program Pi.
The function block information acquisition unit 110 obtains the function block definition name “MY_FB”, input parameters “IN1”, “IN2”, “IN3”, output parameters “OUT”, and input/output from the function block definition section of the read sequence program Pi. Get the parameter "None" as a function block definition. The function block information acquisition unit 110 also acquires instance (variable) names “fbinst1,” “fbinst2,” and “fbinst3” from the variable declaration section of the sequence program Pi.

The function block instance name search unit 120 searches for the usage of the instance name acquired by the function block information acquisition unit 110 from the selected sequence program Pi.
Specifically, the function block instance name search unit 120 searches for the instance name "fbinst1" in the program section of the sequence program Pi shown in FIG. The line “fbinst1.IN2:=fbinst1.IN2*2;” and the 13th line “fbinst1(IN1:=5, IN3:=4, OUT=>out1);” are extracted.
Further, the function block instance name search unit 120 searches for the instance name “fbinst2” and extracts “fbinst2(IN1:=6, IN2:=12, IN3:=11);” on the 23rd line.
Further, the function block instance name search unit 120 searches for the instance name “fbinst3”, and searches for “fbinst3.IN1:=100;” on the 30th line, “fbinst3();” on the 31st line, and “fbinst3();” on the 40th line. Extract “fbinst3.OUT=>out3;”.

Based on the function block definition acquired by the function block information acquisition unit 110 and the search results of the function block instance name search unit 120, the function block analysis unit 130 determines the calling position of the instance defined by the instance name, An access situation including at least either an assignment position or a parameter reference position is analyzed.
Specifically, the function block analysis unit 130 analyzes the sequence program Pi of FIG. In the program section, the call positions for instance names "fbinst1", "fbinst2", and "fbinst3", and the input parameters "IN1", "IN2", and "IN3" for instance names "fbinst1", "fbinst2", and "fbinst3", respectively. The access status including the assignment position of and the reference position of the output parameter "OUT" is obtained as an analysis result.
Then, the function block analysis unit 130 determines the calling position of each of the acquired instance names "fbinst1", "fbinst2", and "fbinst3", the input parameter "IN1" in each of the instance names "fbinst1", "fbinst2", and "fbinst3", Based on the assignment positions of "IN2" and "IN3" and the reference position of the output parameter "OUT", check whether there is an input/input/output parameter assignment process before the instance call position, the instance call position It is then determined whether there is a reference process for output/input/output parameters after that, and whether there are two or more assignment processes for input/input/output parameters for one call of an instance.

In other words, the function block analysis unit 130 inputs data into two locations, the 5th line and the 13th line, with respect to the calling position of the instance with the instance name "fbinst1" on the 13th line in the program section of the sequence program Pi in FIG. Since there is a substitution position for the parameter "IN1", it is determined that the substitution process is being performed twice, and an alert output is determined.
Further, the function block analysis unit 130 determines that there is no reference position of the output parameter “OUT” after the calling position of the instance with the instance name “fbinst2” on the 23rd line in the program section of the sequence program Pi in FIG. Determine the alert output.
Further, the function block analysis unit 130 determines that there is no assignment position for the input parameter “IN3” before the calling position of the instance with the instance name “fbinst3” on the 31st line in the program section of the sequence program Pi in FIG. , determine the output of the alert. Note that the function block analysis unit 130 determines that there is no assignment position for the input parameter “IN2” before calling the instance with the instance name “fbinst3” on the 31st line, but the function block definition unit determines that the initial value “IN2” is not assigned. 10'' is set, an output for prompting attention may be determined.

Function block information display control section 140 displays the analysis results of function block analysis section 130 on display section 40 .
FIG. 3 is a diagram showing an example of an analysis result display screen.
As shown in FIG. 3, the function block information display control unit 140 determines that the input parameter "IN1" is substituted in two places, the 5th line and the 13th line, when calling the instance with the instance name "fbinst1". Then, the frame of the input parameter "IN1" on the 13th line, which is the second substitution position, is displayed in a color such as red, and an alert such as "Double substitution!" is displayed.
Furthermore, in calling the instance with the instance name "fbinst2", the function block information display control unit 140 displays the frame of the output parameter "OUT" in a color such as red because there is no reference to the output parameter "OUT". , displays an alert such as "Reference location not found!".
In addition, in calling the instance with the instance name "fbinst3", the function block information display control unit 140 displays the frame of the input parameter "IN3" in a color such as red because there is no substitution place for the input parameter "IN3". At the same time, an alert saying "No substitution location!" is displayed. Note that when calling the instance with the instance name "fbinst3", the function block information display control unit 140 sets the input parameter "IN2" in the frame because there is only an initial value setting for the input parameter "IN2" and no substitution. may be displayed in a color such as yellow, and a message such as "There are no settings other than the initial values." may be displayed.

<Analysis processing of PLC programming device 1>
Next, the flow of analysis processing of the PLC programming device 1 will be explained with reference to FIG.
FIG. 4 is a flowchart illustrating the analysis process of the PLC programming device 1. The flow shown here is executed every time one sequence program Pi is selected from n sequence programs P1 to Pn.

In step S11, the function block information acquisition section 110 acquires a function block definition from the function block definition section of the selected sequence program Pi.

In step S12, the function block information acquisition section 110 acquires instance information including the instance name from the variable declaration section of the selected sequence program Pi.

In step S13, the function block instance name search unit 120 searches and extracts the usage of the instance name included in the instance information read out in step S12 from the selected sequence program Pi.

In step S14, the function block analysis unit 130 determines the calling position of the instance defined by the instance name, the parameter assignment position, or the parameter reference from the function block definition read in step S11 and the search result in step S13. Analyze access status including location.

In step S15, the function block information display control section 140 displays the analysis result of step S14 on the display section 40.

In step S16, the function block information acquisition unit 110 determines whether there is a next instance. If there is no next instance, the process proceeds to step S17. On the other hand, if there is a next instance, the process returns to step S12.

In step S17, the function block information acquisition unit 110 determines whether there is no next function block definition. If there is no next function block definition, the PLC programming device 1 ends the analysis process. On the other hand, if there is a next function block definition, the process returns to step S11.

As described above, the PLC programming device 1 according to the first embodiment can prevent programming errors such as omissions in parameter substitution and omissions in reference to function blocks, and can prevent accidents due to unintended behavior.
Furthermore, the PLC programming device 1 can easily grasp the situation in which parameters of function blocks are substituted and referenced, thereby reducing the burden on the user.
The first embodiment has been described above.

<Second embodiment>
Next, a second embodiment will be described. As described above, in the first embodiment, all alerts in the analysis results are displayed. On the other hand, the second embodiment differs from the first embodiment in that display/non-display of alerts is selected for each parameter based on user input from among all alerts.
Thereby, the PLC programming device 1A can prevent programming errors such as omissions in parameter substitution and omissions in function block parameters, and can prevent accidents due to unintended behavior.
The second embodiment will be described below.

FIG. 5 is a diagram showing an example of the configuration of a PLC programming device 1A according to the second embodiment. Note that elements having the same functions as those of the PLC programming device 1 in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
As shown in FIG. 5, the PLC programming device 1A includes a control section 10a, a storage section 20, an input section 30, and a display section 40.
The storage unit 20, input unit 30, and display unit 40 have the same functions as the storage unit 20, input unit 30, and display unit 40 in the first embodiment.
The sequence programs P1 to Pn are equivalent to the sequence programs P1 to Pn in the first embodiment.

The control unit 10a includes a CPU, ROM, RAM, CMOS memory, etc., which are configured to be able to communicate with each other via a bus, which is well known to those skilled in the art.
The CPU is a processor that controls the entire PLC programming device 1A. The CPU reads the system program and application program stored in the ROM via the bus, and controls the entire PLC programming device 1A according to the system program and application program. As a result, as shown in FIG. 5, the control unit 10a realizes the functions of the function block information acquisition unit 110, function block instance name search unit 120, function block analysis unit 130, and function block information display control unit 140a. It is composed of
The function block information acquisition unit 110, function block instance name search unit 120, and function block analysis unit 130 are equivalent to the function block information acquisition unit 110, function block instance name search unit 120, and function block analysis unit 130 in the first embodiment. Has a function.

The function block information display control section 140a displays the analysis results of the function block analysis section 130 on the display section 40, similar to the function block information display control section 140 in FIG.
Further, the function block information display control unit 140a selects display/non-display of alerts for each parameter based on user input via the input unit 30.
Specifically, the function block information display control unit 140a controls, for example, when the user places the mouse pointer of the input unit 30 at the instance name “fbinst1” on the analysis result display screen shown in FIG. When the position of the instance name "fbinst1" is touched on the touch panel of the input unit 30, a setting screen for switching display/non-display of alerts is displayed as shown in FIG. When non-display of the parameter "IN1" is selected on the setting screen based on the user's input, the function block information display control unit 140a displays the second parameter of the instance name "fbinst1" as shown by the dashed rectangle. Hide the "IN1" alert.
By doing so, the PLC programming device 1A hides alerts such as locations intended by the user or locations that the user has determined are not errors, and displays only the more important alert locations. It is possible to prevent programming errors such as omissions in parameter substitution and omissions in function block parameters.

Note that the analysis process of the PLC programming device 1A is the same as that shown in FIG. 4, and detailed explanation will be omitted.
However, in step S15 of FIG. 4, the function block information display control unit 140a displays the analysis result of step S14 on the display unit 40, and the position of the instance name “fbinst1” is touched by the user on the touch panel of the input unit 30, etc. If so, a settings screen for switching alert display/hide is displayed, and based on the user's input, the alert for the parameter selected to be hidden on the settings screen is hidden.

As described above, the PLC programming device 1A according to the second embodiment displays only the more important alerted locations by hiding the locations intended by the user and the locations determined by the user to be non-errors. By doing so, it is possible to prevent programming errors such as omissions in parameter substitution and omissions in function block parameters, and to prevent accidents due to unintended behavior.
Furthermore, the PLC programming device 1A can easily grasp the situation in which parameters of function blocks are substituted and referenced, thereby reducing the burden on the user.
The second embodiment has been described above.

<Third embodiment>
Next, a third embodiment will be described. As described above, in the first embodiment, all alerts in the analysis results are displayed. The second embodiment differs from the first embodiment in that display/non-display of alerts is selected for each parameter based on user input from among all alerts. In contrast, in the third embodiment, when the access status displayed based on the user's input is selected, the screen transitions to an editing screen for editing the part of the selected access status. This is different from the second embodiment.
Thereby, the PLC programming device 1B can prevent programming errors such as omissions in parameter substitution and omissions in function blocks, and can prevent accidents due to unintended behavior.
The third embodiment will be described below.

FIG. 7 is a diagram showing an example of the configuration of a PLC programming device 1B according to the third embodiment. Note that elements having the same functions as those of the PLC programming device 1 in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
As shown in FIG. 7, the PLC programming device 1B includes a control section 10b, a storage section 20, an input section 30, and a display section 40.
The storage unit 20, input unit 30, and display unit 40 have the same functions as the storage unit 20, input unit 30, and display unit 40 in the first embodiment.
The sequence programs P1 to Pn are equivalent to the sequence programs P1 to Pn in the first embodiment.

The control unit 10b includes a CPU, ROM, RAM, CMOS memory, etc., which are configured to be able to communicate with each other via a bus, which are well known to those skilled in the art.
The CPU is a processor that controls the entire PLC programming device 1B. The CPU reads the system program and application program stored in the ROM via the bus, and controls the entire PLC programming device 1B according to the system program and application program. As a result, as shown in FIG. 7, the control unit 10b realizes the functions of the function block information acquisition unit 110, function block instance name search unit 120, function block analysis unit 130, and function block information display control unit 140b. It is composed of
The function block information acquisition unit 110, function block instance name search unit 120, and function block analysis unit 130 are equivalent to the function block information acquisition unit 110, function block instance name search unit 120, and function block analysis unit 130 in the first embodiment. Has a function.

The function block information display control section 140b displays the analysis results of the function block analysis section 130 on the display section 40, similar to the function block information display control section 140 in FIG.
Furthermore, when one of the access situations is selected from the analysis results displayed based on the user's input via the input unit 30, the function block information display control unit 140b provides text for editing the part of the selected access situation. Transition to an editing screen such as an editor.
Specifically, the function block information display control unit 140a allows the user to input the instance name “fbinst2” indicated by a dashed rectangle using the mouse or touch panel of the input unit 30 on the analysis result display screen shown in FIG. 8, for example. By being selected, as shown in FIG. 9, the screen changes to an editing screen for editing the program section of the sequence program Pi, and jumps to the code position of the selected instance name "fbinst2" shown in shaded area.
By doing so, the PLC programming device 1B can easily edit the code at the corresponding location according to the analysis result.

Note that the analysis process of the PLC programming device 1B is the same as that shown in FIG. 4, and detailed explanation will be omitted.
However, in step S15 of FIG. 4, the function block information display control unit 140b displays the analysis result of step S14 on the display unit 40, and the user selects an instance name such as “fbinst2” using the touch panel of the input unit 30. In this case, the screen changes to an editing screen for editing the program section of the sequence program Pi, and jumps to the code position of the selected instance name. In this case, if editing of the code of the selected instance name is completed, the process advances to step S16.

As described above, the PLC programming device 1B according to the third embodiment prevents programming mistakes such as omission of parameter substitution and reference of function blocks by transitioning to an editing screen for editing the code of the corresponding part according to the analysis result. It is possible to prevent accidents caused by unintended behavior.
Furthermore, the PLC programming device 1B can easily grasp the situation in which parameters of function blocks are substituted and referenced, thereby reducing the burden on the user.
The third embodiment has been described above.

Although the first embodiment, second embodiment, and third embodiment have been described above, the

PLC programming devices

1, 1A, and 1B are not limited to the above-mentioned embodiments, and can be used within the range that can achieve the purpose. Including modifications, improvements, etc.

<Modification 1>
In the first embodiment, the second embodiment, and the third embodiment, the sequence programs P1 to Pn are stored in the storage unit 20 of the

PLC programming device

1, 1A, 1B, but the present invention is not limited thereto. For example, the sequence programs P1 to Pn may be stored in an external device such as a server.

<Modification 2>
Further, for example, in the first and second embodiments described above, the

PLC programming devices

1, 1A, and 1B, as shown in FIG. Although the access status of the instance and each parameter is analyzed and the analysis results are sequentially displayed in step S15, the present invention is not limited to this. For example, the

PLC programming devices

1 and 1A may analyze the access status of instances and each parameter for all instances and all function block definitions, and display the analysis results.

<Modification 3>
For example, in the third embodiment described above, the PLC programming device 1B analyzes the access status of instances and each parameter for each instance (step S16) and for each function block definition (step S17), as shown in FIG. Then, in step S15, the analysis results are sequentially displayed, and if an instance name is selected, the screen changes to an editing screen for editing the program section of the sequence program Pi, and the screen jumps to the code position of the selected instance name and edits it. However, it is not limited to this. For example, the PLC programming device 1B analyzes the access status of instances and each parameter for all instances and all function block definitions, displays the analysis results, and when an instance name is selected, the program section of the sequence program Pi is displayed. It may be possible to transition to an editing screen for editing, jump to the code position of the selected instance name, and edit.

Note that each function included in the

PLC programming devices

1, 1A, and 1B in the first embodiment, the second embodiment, and the third embodiment can be realized by hardware, software, or a combination thereof. Here, being realized by software means being realized by a computer reading and executing a program.

The program can be stored and delivered to a computer using various types of non-transitory computer readable media. Non-transitory computer-readable media include various types of tangible storage media. Examples of non-transitory computer-readable media are magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROMs (Read Only Memory), CD-ROMs, R, CD-R/W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM). The program may also be provided to the computer on various types of transitory computer readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can provide the program to the computer via wired communication channels such as electrical wires and optical fibers, or via wireless communication channels.

Note that the step of writing a program to be recorded on a recording medium includes not only processes that are performed in chronological order, but also processes that are not necessarily performed in chronological order but are executed in parallel or individually. It also includes.

In other words, the information processing device of the present disclosure can take various embodiments having the following configurations.

(1) The PLC programming device 1, which is an information processing device of the present disclosure, includes a function block information acquisition unit 110 that acquires a function block definition and an instance name from a sequence program Pi, and a function block information acquisition unit 110 that acquires a function block definition and an instance name from a sequence program Pi. Based on the function block instance name search unit 120 that searches for usage locations of the obtained instance name, the function block definition obtained by the function block information acquisition unit 110, and the search results of the function block instance name search unit 120, A function block analysis unit 130 that analyzes an access situation including at least one of an instance call position defined by an instance name, a parameter assignment position, or a parameter reference position, and a display unit that displays the analysis results of the function block analysis unit 130. 40, a function block information display control section 140 is provided.
According to this PLC programming device 1, it is possible to prevent programming errors such as omissions in parameter substitution and omissions in function blocks, and to prevent accidents due to unintended behavior.

(2) In the PLC programming device 1 described in (1), the function block analysis unit 130 determines whether there is an assignment process for an input/input/output parameter among the parameters before the instance call position. Determines whether there is reference processing for output/input/output parameters among the parameters after the position, and whether there is assignment processing for input/input/output parameters in two or more places for one instance call. The function block information display control unit 140 may display an alert on the display unit 40 if the determination result of the function block analysis unit 130 falls under any of the following.

(3) In the PLC programming device 1A described in (2), the function block information display control unit 140a may select display/non-display of the alert for each parameter based on user input.

(4) In the PLC programming device 1B described in any one of (1) to (3), the function block information display control unit 140 controls the selected access status when the access status displayed based on the user's input is selected. You may transition to an editing screen where you can edit the access status.

1, 1A, 1B

PLC programming device

10, 10a, 10b Control section 110 Function block information acquisition section 120 Function block instance name search section 130 Function

block analysis section

140, 140a, 140b Function block information display control section 20 Storage section 30 Input section 40 Display section P1 to Pn Sequence program

Claims

a function block information acquisition unit that acquires a function block definition and an instance name from the sequence program;
a function block instance name search unit that searches for a usage location of the instance name acquired by the function block information acquisition unit from the sequence program;
Based on the function block definition acquired by the function block information acquisition unit and the search result of the function block instance name search unit, the call position, parameter assignment position, or parameter of the instance defined by the instance name is determined. a function block analysis unit that analyzes an access situation including at least one of the reference positions;
a function block information display control unit that displays analysis results of the function block analysis unit on a display unit;
An information processing device comprising:
The function block analysis unit determines whether there is an assignment process for an input/input/output parameter among the parameters before the calling position of the instance, and whether there is an assignment process for an input/input/output parameter among the parameters after the calling position of the instance. Determine whether there is a reference process of , and whether there are two or more assignment processes to the input/input/output parameters for one call of the instance,
2. The information processing apparatus according to claim 1, wherein the function block information display control section displays an alert on the display section if the determination result of the function block analysis section falls under any of the following.
The information processing apparatus according to claim 2, wherein the function block information display control section selects display/non-display of the alert for each of the parameters based on user input.
Claims 1 to 3, wherein, when the access status displayed based on user input is selected, the function block information display control unit transitions to an editing screen for editing a portion of the selected access status. The information processing device according to any one of the above.