JP2012159868A - Programming device of programmable logic controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a programming device of a programmable logic controller such that a user can easily recognize the execution order of a specified FBD component in a processing group and FBD components processed before and after the specified FBD component.SOLUTION: The programming device includes a component information management part 202 which stores connection relation among a plurality of FBD components arranged in an editor window; an execution order determination part 203 which extracts FBD components connected directly or indirectly to an FBD component specified in the editor window based upon the connection information, and determines the execution order of the FBD components in a processing group consisting of only the extracted FBD components according to arrangement positions of the extracted FBD components; and an editor part 201 which displays the execution order of the extracted FBD components in the processing group with natural numbers starting with 1. The editor part 201 does not display execution order of FBD components which are not included on the processing group in the editor window.

Description

  The present invention relates to a programmable logic controller programming device for creating a program using an FBD language.

  Programmable logic controllers (PLCs) are used to control controlled devices sequentially in factory production lines, individual devices, and on-site such as plants and office buildings. In the programming, an FBD (Function Block Diagram) language which is a programming language for a programmable logic controller defined as a standard IEC61131-3 by the International Electrotechnical Commission (IEC) is used.

  The FBD language program describes a series of processes by arranging FBD parts as functions and function blocks such as function blocks and connecting them. Connection lines, which are parts connecting these FBD parts, have no difference in line thickness or color and are uniform.

  Each FBD component includes an input terminal on the left side and an output terminal on the right side, and the FBD components are connected to each other via the input terminal and the output terminal.

  The FBD language program is executed from the left to the right and from the top to the bottom on the editor screen on which the FBD parts are arranged. In order for each FBD part to execute the process, a series of input before the input terminal of the FBD part is executed. Must be executed.

  The software describing the FBD language may have a function of displaying the execution order of each FBD component as a means for confirming the data use path. However, since the conventional model displays the execution order by serial number through all the FBD parts, when the processing units are divided into a plurality of processing groups, it is necessary to grasp the execution order of only a specific processing group. Not suitable.

  Japanese Patent Laid-Open No. 2004-228867 describes a method for developing a program by describing the specification of a program using a data flow diagram showing a flow of processing by a functional block indicating data processing. An invention for adding priority to each is disclosed.

JP 2008-171305 A

  In the FBD language program, when a range in which FBD parts are connected is set as a processing group, the execution order of the displayed FBD parts is referred to in order to confirm the data use path in a certain processing group. At this time, in the conventional function, the execution order is also displayed on the FBD parts belonging to the processing group unrelated to the processing group for performing the usage route check. In addition, since the execution order is displayed by serial numbers including the processing group for which the usage route confirmation is performed and other processing groups, the execution order displayed for FBD parts belonging to the second and subsequent processing groups is 1. The number does not start with, and the execution order within the processing group is difficult to understand.

  Also, when trying to figure out the data usage route by paying attention to a certain FBD component, the execution order is displayed as a number from 1. Therefore, it is difficult to know before and after the processing from the focused FBD component. It is difficult to understand the interval between each process from the FBD component.

  Furthermore, since there is no difference in the line thickness and color display of the connection lines, which are parts connecting the FBD parts, which is the FBD part immediately before and after being connected to the focused FBD part by the connection line. It is difficult to understand.

  The invention disclosed in Patent Document 1 sets the rank in units of frames, and does not consider anything about the rank of each functional block in the frame.

  The present invention has been made in view of the above, and is a programming that allows the user to easily recognize the execution order of the designated FBD parts in the processing group and the FBD parts processed before and after the designated FBD parts. The object is to obtain a logic controller programming device.

  In order to solve the above-mentioned problems and achieve the object, the present invention arranges a plurality of FBD parts, which are functional blocks that perform predetermined processing on data, on the editor screen, and arranges between the arranged FBD parts. Is a programming device of a programmable logic controller that creates an FBD program in which a plurality of FBD parts are executed in an order corresponding to each arrangement position, and a plurality of FBD parts arranged on an editor screen Component information management means for storing connection information indicating the connection relationship between the FBD component and the FBD component directly connected to the FBD component designated on the editor screen based on the connection information and other FBD components indirectly The connected FBD parts are extracted, and the execution order of the FBD parts in the processing group consisting only of the extracted FBD parts is extracted. Execution order determining means for determining according to the arrangement position of each of the FBD parts, and execution order display means for displaying the execution order of the extracted FBD parts in the processing group on the editor screen as a natural number starting from 1. The execution order display means does not display the execution order on the editor screen for FBD parts not included in the processing group.

  According to the present invention, there is an effect that the user can easily recognize the execution order of the designated FBD parts in the processing group and the FBD parts processed before and after the designated FBD parts.

FIG. 1 is a diagram showing a configuration of a first embodiment of a programming device for a programmable logic controller according to the present invention. FIG. 2 is a flowchart showing an operation flow of the programming device. FIG. 3 is a diagram illustrating an example of display of the execution order of the FBD parts. FIG. 4 is a flowchart showing the flow of processing when the programming device highlights the connection line connected to the FBD component designated by the user. FIG. 5 is a diagram illustrating an example of highlighting of the connection line connected to the designated FBD component. FIG. 6 is a diagram showing an example of an editor screen in a conventional programming device. FIG. 7 is a flowchart of an operation flow of the programming device according to the second embodiment. FIG. 8 is a diagram illustrating an example of display of the execution order of the FBD parts.

  Embodiments of a programming device for a programmable logic controller according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a first embodiment of a programming device for a programmable logic controller according to the present invention. A programmable logic controller programming device (hereinafter also referred to as a programming device) 200 includes an editor unit 201, a component information management unit 202, and an execution order determination unit 203. As the programming device 200, a general computer equipped with an input device, a display device, a storage device, and the like can be applied. Thus, the editor unit 201, the component information management unit 202, and the execution order determination unit 203 are realized on the control unit.

  The editor unit 201 has a function for displaying an editor screen and an input interface function for accepting a user operation via the input device. An FBD component is displayed on the editor screen based on an operation performed via the input device. Are arranged, a connection line connecting the FBD parts is displayed on the editor screen, or the execution order of each FBD part is displayed on the editor screen. The component information management unit 202 stores information on the FBD components already arranged on the editor screen and the connection lines connecting them. That is, in the component information management unit 202, information relating the input / output terminals and the connection destinations of each FBD component is stored as connection information. The execution order determination unit 203 determines the execution order of the FBD parts in the processing group to which the FBD part specified on the editor screen belongs based on a predetermined rule.

  FIG. 2 is a flowchart showing an operation flow of the programming device 200. For a program created using the FBD language, in step S301, the user designates an FBD component to be arranged on the editor screen displayed by the editor unit 201. In step S302, the component information management unit 202 refers to the connection information of the specified FBD component, and traces the FBD component connected to the specified FBD component, thereby performing the same processing as the specified FBD component. FBD parts belonging to the group are extracted. In step S303, the execution order determination unit 203 determines the execution order of the designated FBD parts and the extracted FBD parts in the processing group according to a predetermined rule. For example, the execution order is determined in the order of left to right and top to bottom on the editor screen on which the FBD parts are arranged. Note that the execution order of the FBD parts may be determined by a rule different from the example shown here, and the user may arbitrarily set the rule. In step S304, the editor unit 201 displays the determined execution order on the editor screen.

FIG. 3 is a diagram illustrating an example of display of the execution order of the FBD parts. In the following explanation, when there is a need to distinguish between a plurality of components, a symbol is appended with a subscript, and when a plurality of components are all represented, a subscript is not appended. . The FBD parts 401 (401 _{1 to} 401 ₆ ) are functions and function blocks for performing programming using the FBD language. A connection line 402 (402 _{1 to} 402 ₅ ) connects the FBD parts 401 to each other and transmits data from the left end toward the right end. The execution order display area 403 (403 _{1 to} 403 ₆ ) is an area for displaying the execution order determined by the execution order determination unit 203. Each of the processing groups 404 and 405 is composed of a plurality of FBD parts 401, and the two groups are not connected by the connection line 402, and thus are different processing groups.

When the FBD parts 401 ₅ enclosed by one-dot chain line is specified in FIG. 3, parts information managing section 202, follows the connecting line ₄₀₂ 3, 402 ₅ connected to the FBD parts 401 _5, FBD parts 401 ₅ FBD parts 401 ₃ , 401 ₄ , and 401 ₆ that are connected to are extracted. The execution order determination unit 203 determines the execution order of the FBD components 401 _{3 to} 401 ₆ . The editor unit 201 displays the execution order as a natural number starting from 1 in the execution order display areas 403 _{3 to} 403 ₆ .

For FBD parts ₄₀₁ 1, 401 ₂ of FBD parts 401 ₅ does not belong treatment group 405, not displayed execution order. For the FBD parts 401 ₁ and 401 ₂ of the processing group 405, the number indicating the execution order in the processing group 405 is displayed in a format that can be distinguished from the execution order of the processing group 404 independently of the processing group 404. You may do it. For example, the colors of the execution order display areas 403 ₁ and 403 ₂ may be changed from the execution order display areas 403 _{3 to} 403 ₆ or the number of colors and fonts may be changed.

  FIG. 4 is a flowchart showing a processing flow when the programming device 200 highlights the connection line connected to the FBD component designated by the user. For a program created using the FBD language, in step S601, the user designates a component to be arranged on the editor screen displayed by the editor unit 201. In step S602, the component information management unit 202 scans connection information of the specified FBD component, and extracts only connection lines connected to the specified FBD component. In step S <b> 603, the editor unit 201 displays the extracted connection line on the editor screen in a state that can be visually distinguished from other connection lines. For example, highlighting such as changing the thickness or color of the line is performed.

FIG. 5 is a diagram illustrating an example of highlighting of the connection line connected to the designated FBD component. In the following explanation, when there is a need to distinguish between a plurality of components, a symbol is appended with a subscript, and when a plurality of components are all represented, a subscript is not appended. . The FBD parts 701 (701 _{1 to} 701 ₄ ) are functions and function blocks for performing programming using the FBD language. Connection lines 702 (702 _{1 to} 702 ₄ ) connect the FBD components 701 to each other, and transmit data from the left end toward the right end. The connection lines 702 ₂ and 702 ₄ connected to the designated FBD component 701 ₃ have a different line thickness from the connection lines 702 ₁ and 702 ₃ not connected to the designated connection line. Can be distinguished. For this reason, the user can easily grasp the connection status of the FBD component 701 (which is the immediately preceding / immediate FBD component) and can reduce the time required for the user to search for a use route.

For comparison, an example of an editor screen in a conventional programming device is shown in FIG. Although the execution order is displayed in the execution order display area 103 (103 _{1 to} 103 ₆ ) in the FBD parts 101 (101 _{1 to} 101 ₆ ) of the conventional editor screen 110, it is not the order for each of the processing groups 107 and 108. The number is continuous through all the FBD parts 101 _{1 to} 101 ₆ . For this reason, regarding the processing group 107, the youngest number displayed in the execution order display area 103 is “3” instead of “1”. Therefore, the user cannot recognize which FBD parts 101 _{3 to} 101 ₆ are processed in which order unless the number of execution orders of each of the FBD parts 101 _{3 to} 101 ₆ in the processing group 107 is confirmed. . In the conventional programming device, the connection lines 102 (102 _{1 to} 102 ₅ ) for connecting the FBD parts 101 (101 _{1 to} 101 ₆ ) are the same regardless of which of the FBD parts 101 is selected. Since it is displayed, it is difficult to determine which FBD component 101 is processed before and after the designated FBD component 101.

  On the other hand, in this embodiment, since the execution order is displayed with a number starting from “1” for any of the processing groups to which the designated FBD part belongs, the user can select the processing group to which the designated FBD part belongs. The execution order of the FBD parts can be easily recognized. Further, since the connection line directly connected to the designated FBD component is highlighted, the user can easily grasp the FBD component processed immediately before and after the designated FBD component.

  As described above, the programming device of the programmable logic controller according to the present embodiment displays the execution order with sequential numbers only on the FBD parts of the processing group to which the specified FBD part belongs, so that the FBD parts in the processing group are displayed. The user can easily understand the execution order. As a result, it is possible to shorten the time during which the programming device is activated during debugging, and to save energy.

Embodiment 2. FIG.
The configuration of the programming device of the programmable logic controller according to the second embodiment of the present invention is the same as that of the first embodiment. FIG. 7 is a flowchart of an operation flow of the programming device according to the second embodiment. For a program created using the FBD language, in step S501, the user designates an FBD component arranged on the editor screen displayed by the editor unit 201. In step S502, the execution order determination unit 203 determines the execution order of the FBD parts. In the present embodiment, the execution order for FBD parts belonging to all processing groups is determined. In step S503, the execution order determination unit 203 sets the number based on the execution order determined in step S502 to the designated FBD component as a base point (0), adds a positive / negative sign, and sequentially numbers in the execution order. Convert to In step S504, the editor unit 201 displays the execution order determined and converted by the execution order determination unit 203.

FIG. 8 is a diagram illustrating an example of display of the execution order of the FBD parts. And the FBD component 401 ₅ enclosed specified by a one-dot chain line in FIG. 8. In this case, the order of execution of the FBD parts ₄₀₁ 1 to 401 ₆ is determined by the implementing order determining portion 203 based on the connection state of the connecting line ₄₀₂ 1-402 _5. In the editor screen 201, the execution order of FBD parts 401 ₆ to be executed after the FBD parts 401 ₅ specified is displayed on the execution order display area 403 ₆ as "+1". Further, the order of execution of FBD parts ₄₀₁ 1 to 401 ₄ which is executed before the FBD parts 401 ₅ specified is displayed on the execution order display area ₄₀₃ 1 to 403 ₄ as "-4" - "-1" The Thus, the user, the process before and after the FBD parts 401 ₅ above specified editor screen 201 can be easily grasped. Here not only FBD parts ₄₀₁ 3-401 ₆ belonging to treatment group 404 containing the FBD parts 401 ₅ that is specified, FBD part ₄₀₁ 1 which belongs to the process group 405 without the FBD parts 401 _5, 401 ₂ also execution sequence it's shown.

  In step S504, the editor unit 201 may display the number indicating the execution order with a positive or negative sign, and the FBD component to be displayed or the execution order display area in a color corresponding to the number. For example, different colors may be used depending on the sign, and the brightness may be changed depending on the absolute value. Further, the FBD component itself and the color of the execution order display area may be changed according to the number indicating the execution order. By displaying the FBD component, execution order display area, or the number of colors according to the number indicating the execution order, the user can visually determine the execution order of the processes, and the data usage route can be easily identified. It becomes.

  As in the first embodiment, when displaying the execution order of the FBD parts only for the processing group including the designated FBD parts, the part information management unit 202 scans the connection information of the designated FBD parts. Then, by tracing the FBD part connected to the designated FBD part, FBD parts belonging to the same processing group as the designated FBD part are extracted. Similarly, the execution order of the FBD parts may be displayed only for some of the two or more processing groups.

  As described above, the programming device according to the present embodiment allows the user to visually determine whether or not the processing is performed before the designated FBD part and how far the execution order is away from the designated FBD part. Can be easily recognized. That is, the user can determine whether the designated FBD component is pre-processing or post-processing based on a positive or negative sign, and the processing interval from the designated FBD component can be determined by the magnitude of the number (absolute value). Therefore, the user can easily grasp the data use route. As a result, it is possible to shorten the time during which the programming device is activated during debugging, and to save energy.

  Each of the above embodiments is an example of implementation, and the present invention is not limited to these, and various modifications are possible. For example, in the second embodiment, similarly to the first embodiment, it is possible to highlight a connection line connected to a designated FBD component.

DESCRIPTION OF SYMBOLS 200 Programming apparatus 201 Editor part 202 Part information management part 203 Execution order determination part 401,701 FBD part 402,702 Connection line 403 Execution order display area 404,405 Processing group

Claims (5)

A plurality of FBD parts, which are functional blocks that perform predetermined processing on the data, are arranged on the editor screen, the plurality of arranged FBD parts are connected by connection lines, and a plurality of the FBD parts are arranged on the respective screens. A programmable logic controller programming device for creating an FBD program to be executed in an order according to a position,
Component information management means for storing connection information indicating a connection relationship between the plurality of FBD components arranged on the editor screen;
Based on the connection information, the FBD part directly connected to the FBD part specified on the editor screen and the FBD part indirectly connected through the other FBD part are extracted. Execution order determining means for determining the execution order of the FBD parts in a processing group consisting only of the extracted FBD parts according to the arrangement positions of the extracted FBD parts;
Execution order display means for displaying the execution order of the extracted FBD parts in the processing group on the editor screen as a natural number starting from 1.
The programmable logic controller programming device, wherein the execution order display means does not display the execution order on the editor screen for the FBD parts not included in the processing group. A plurality of FBD parts, which are functional blocks that perform predetermined processing on the data, are arranged on the editor screen, the plurality of arranged FBD parts are connected by connection lines, and a plurality of the FBD parts are arranged on the respective screens. A programmable logic controller programming device for creating an FBD program to be executed in an order according to a position,
Component information management means for storing connection information indicating a connection relationship between the plurality of FBD components arranged on the editor screen;
Based on the connection information, the FBD part directly connected to the FBD part specified on the editor screen and the FBD part indirectly connected through the other FBD part are extracted. Execution order determining means for determining the execution order of the FBD parts in a processing group consisting only of the extracted FBD parts according to the arrangement positions of the extracted FBD parts;
The execution order of the extracted FBD parts in the processing group is set to 0 for the FBD parts specified on the editor screen, and the FBD parts executed before the specified FBD parts are negative numbers. The FBD component executed after the designated FBD component has an execution order display means for displaying a positive number on the editor screen.
The programmable logic controller programming device, wherein the execution order display means does not display the execution order on the editor screen for the FBD parts not included in the processing group. A plurality of FBD parts, which are functional blocks that perform predetermined processing on the data, are arranged on the editor screen, the plurality of arranged FBD parts are connected by connection lines, and a plurality of the FBD parts are arranged on the respective screens. A programmable logic controller programming device for creating an FBD program to be executed in an order according to a position,
Component information management means for storing connection information indicating a connection relationship between the plurality of FBD components arranged on the editor screen;
Means for determining, based on the connection information, an execution order of the plurality of FBD parts arranged on the editor screen in accordance with an arrangement position of each of the plurality of FBD parts;
The execution order of the plurality of FBD parts arranged on the editor screen is set such that the FBD part specified on the editor screen is 0, and the FBD part executed before the specified FBD part is negative. And an execution order display means for displaying on the editor screen the FBD parts executed after the designated FBD parts are positive numbers, .   The FBD part executed before the designated FBD part and the FBD part executed after the designated FBD part are displayed on the editor screen in different colors. The programming device of the programmable logic controller according to 2 or 3.   The programmable connection according to any one of claims 1 to 3, wherein the connection line connected to the FBD component designated on the editor screen is displayed in a display format different from the other connection lines. Logic controller programming device.

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