LADDER-PROGRAM DISPLAY PROGRAM AND LADDER-PROGRAM DISPLAY APPARATUS

• US 20160004242A1
• Filed: 03/07/2013
• Published: 01/07/2016
• Est. Priority Date: 03/07/2013
• Status: Abandoned Application

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: YAMAOKA, Takayuki, HAMAZAKI, Hiroshi
• Application Number:
  US14/766,809
• Publication Number:
  US 20160004242A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G05B 19/056 Programming the PLC

Abstract

A ladder-program display program that causes a computer to execute: a hierarchical data retaining step of storing a ladder program in a form of a data structure representation that expresses the ladder program by a logical hierarchical structure by expressing each circuit block, which is a hierarchical unit of the ladder program, by a logical expression; and a display processing step of causing, on a basis of the data structure representation, the ladder program to be displayed on a display device in a form of a data structure representation or a ladder diagram in which each hierarchical unit of the hierarchical structure is visually capable of being identified.

Claims

1. A ladder-program display program that causes a computer to execute:

a hierarchical data retaining step of storing a ladder program in a form of a data structure representation that expresses the ladder program by a logical hierarchical structure by expressing each circuit block, which is a hierarchical unit of the ladder program, by a logical expression; and

a display processing step of causing, on a basis of the data structure representation, the ladder program to be displayed on a display device in a form of a data structure representation or a ladder diagram in which each hierarchical unit of the hierarchical structure is visually capable of being identified.

2. The ladder-program display program according to claim 1, wherein the display processing step includes causing each hierarchical unit of the hierarchical structure to be displayed in a different color.

3. The ladder-program display program according to claim 1, further causing a computer to execute a target setting step of setting a hierarchical unit specified by a user as a processing target, wherein

the display processing step includes causing a hierarchical unit set as a processing target to be displayed such that the hierarchical unit is capable of being distinguished from a hierarchical unit that is not set as a processing target.

4. The ladder-program display program according to claim 1, further causing a computer to execute:

a target setting step of setting a hierarchical unit specified by a user as a processing target; and

an omission displaying step of causing the hierarchical unit set as a processing target to be displayed in an omitted manner in the ladder program.

5. The ladder-program display program according to claim 1, further causing a computer to execute:

a target setting step of setting a hierarchical unit specified by a user as a processing target; and

an editing step of performing a program editing using the hierarchical unit set as a processing target in accordance with an instruction from a user.

6. The ladder-program display program according to claim 1, further causing a computer to execute:

a target setting step of setting a hierarchical unit specified by a user as a processing target; and

a monitor-value obtaining step of obtaining a monitor value of only a variable included in the hierarchical unit set as a processing target from a processing unit that executes the ladder program, wherein

the display processing step includes causing an execution state of the hierarchical unit set as a processing target to be displayed on a monitor by using the monitor value.

7. The ladder-program display program according to claim 1, wherein the display processing step includes causing a depth of the hierarchical unit in a hierarchical structure to be displayed on the display device.

8. The ladder-program display program according to claim 1, wherein the display processing step includes causing, when a plurality of same circuit blocks are present in one hierarchical unit, the same circuit blocks to be highlighted.

9. The ladder-program display program according to claim 1, wherein the display processing step includes a ladder-diagram generating step of generating the ladder diagram on a basis of the data structure representation.

10. The ladder-program display program according to claim 1, further causing a computer to execute:

an inputting step of inputting a ladder diagram; and

a hierarchy analyzing step of generating a data structure representation corresponding to the ladder diagram by analyzing a hierarchical structure of the ladder diagram, wherein

the hierarchical data retaining step includes storing generated data structure representation.

11. A ladder-program display program that causes a computer to execute:

a hierarchical data retaining step of storing a ladder program in a form of a data structure representation that expresses the ladder program by a logical hierarchical structure by expressing each circuit block, which is a hierarchical unit of the ladder program, by a logical expression;

a display processing step of causing the ladder program to be displayed on a display device in a form of the data structure representation;

a target setting step of setting a hierarchical unit specified by a user as a processing target; and

an editing step of performing a program editing using the hierarchical unit set as a processing target on the ladder program having the data structure representation in accordance with an instruction from a user.

12. A ladder-program display apparatus comprising:

a hierarchical data retaining unit that stores a ladder program in a form of a data structure representation that expresses the ladder program by a logical hierarchical structure by expressing each circuit block, which is a hierarchical unit of the ladder program, by a logical expression; and

a display processing unit that causes, on a basis of the data structure representation, the ladder program to be displayed on a display device in a form of a data structure representation or a ladder diagram in which each hierarchical unit of the hierarchical structure is visually capable of being identified.

13. A ladder-program display apparatus comprising:

a hierarchical data retaining unit that stores a ladder program in a form of a data structure representation that expresses the ladder program by a logical hierarchical structure by expressing each circuit block, which is a hierarchical unit of the ladder program, by a logical expression;

a display processing unit that causes the ladder program to be displayed on a display device in a form of the data structure representation;

a target setting unit that sets a hierarchical unit specified by a user as a processing target; and

an editing unit that performs a program editing using the hierarchical unit set as a processing target on the ladder program having the data structure representation in accordance with an instruction from a user.