JP2012053676A - Program conversion processing apparatus, method and program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convert a ladder program into a C language program, easily generate a program operating on a CPU substrate even without the knowledge for the C language program, and make effective use of an existing program asset.SOLUTION: The program conversion processing apparatus includes: storage means 20 which stores a program conversion table 50 recording a C language command corresponding to a ladder command; and information processing means 10 which converts the input ladder program command into the C language command using the program conversion table 50 to generate a C language program from the ladder program. The conversion result is sequentially stored in a conversion data storage area 70 in the storage means 20.

Description

  The present invention relates to a program conversion processing apparatus, method and program for converting a ladder program into a C language program, and a recording medium on which the program is recorded.

  The ladder program is used to describe operation commands such as a PLC (programmable logic controller) in process control and sequence control of factory automation. This ladder program is substantially equivalent to a circuit using a relay, and is excellent in that it can be easily understood and used by engineers. However, it cannot be directly used as a program for controlling a general CPU board (board computer), and the range of use is limited.

  On the other hand, C language programs using C language are widely used not only for personal computers but also for embedded microcomputers and large computers, and have a large programmer population. For this reason, if the ladder program can be converted into a C language program, it is possible to easily create a program that operates on various CPU boards not supported by the ladder program. However, at present, a converter that converts a ladder program into a C language program is available. Not proposed.

  In view of the above points, the present invention can convert a ladder program into a C language program, can easily create a program that operates on a CPU board without knowledge of the C language program, and can effectively use existing program resources. It is an object of the present invention to provide a program conversion processing apparatus, method and program that can be utilized, and a recording medium on which the program is recorded.

To achieve the above object, according to a first aspect of the present invention, there is provided a program conversion processing device, a storage unit storing a program conversion table in which C language commands corresponding to ladder commands are stored;
And an information processing means for converting an input ladder program command into a C language command using the program conversion table and creating a C language program from the ladder program.

A second aspect of the present invention is a program conversion processing method using a program conversion table in which C language commands corresponding to ladder commands are recorded.
An input ladder program command is converted into a C language command by the information processing unit using the program conversion table, and a C language program is created from the ladder program.

  A third aspect of the present invention is a program, and is characterized in that a computer is operated as each means of the program conversion processing device of the first aspect.

  According to a fourth aspect of the present invention, there is provided a recording medium that is readable by a computer recording the program according to the third aspect.

  It should be noted that any combination of the above components is also effective as an aspect of the present invention.

  According to the present invention, a ladder program can be converted into a C language program, and a program that operates on a CPU board can be easily created without knowledge of the C language program. In addition, existing program assets can be used effectively.

1 is a block diagram showing an embodiment of a program conversion processing device, method and program, and a recording medium according to the present invention. It is explanatory drawing which shows the example which converted the ladder program into the C language program.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, process, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  In FIG. 1, the program conversion processing apparatus includes an information processing means (CPU) 10, a storage means 20, and an input / output interface (I / O) 30, and is configured so that a DOS / V personal computer can be used as hardware. .

  A recording medium 40 such as a CD-ROM storing ladder program-C language program conversion software for operating the information processing means 10 and the storage means 20 as a program conversion processing device is prepared, and stored in this recording medium 40 The ladder program-C language program conversion software is read by the information processing means 10 via the input / output interface 30, and the program conversion table 50 in which the C language commands corresponding to the ladder commands are recorded is stored in the storage means 20. . Along with this, a program part that defines the operation of the information processing means 10 is also stored in the storage means 20. In the program conversion table 50, for example, C language commands corresponding to the following ladder commands are prepared.

  Examples of ladder commands: Timer, counter, data comparison, data transfer, shift, increment, decrement, four arithmetic operations, data conversion, logical operation, subroutine, special instruction word, double word, etc.

  Next, a recording medium 60 such as a CD-R, USB flash memory, FD, hard disk or the like on which a ladder program to be converted is recorded is prepared, and the ladder program stored in the recording medium 60 is input via the input / output interface 30. The information is read by the information processing means 10, and the input ladder program command is converted into a C language command using the program conversion table 50, and the ladder program {FIG. 2 (A)} is converted to the C language program {FIG. 2 (B). }. The conversion is performed for each ladder command or each command group, and the conversion result is sequentially stored in the conversion data storage area 70 in the storage means 20. When all the input ladder programs have been converted, a C language program is obtained in the conversion data storage area 70.

  The converted C language program can be output and recorded on a predetermined recording medium, and written into a ROM or the like of a CPU board (board computer) using the C language program output to the recording medium. It becomes possible to cause the CPU board to perform the same operation as the original ladder program.

  According to the present embodiment, the following effects can be achieved.

(1) A ladder program can be converted into a C language program, and a program that operates on a CPU board can be easily created without knowledge of the C language program.

(2) Program resources described as existing ladder programs can be used effectively, and the program can be made into a black box (it is difficult to read the specific description of the program after it is written on the CPU board). is there).

(3) A personal computer can be used as hardware, and it can be provided as an application program (and a recording medium on which the application program is recorded) that causes the personal computer to function as a program conversion processing device. Of course, it is also possible to configure as dedicated hardware with a built-in program conversion table in which C language commands corresponding to ladder commands are recorded.

  The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way.

DESCRIPTION OF SYMBOLS 10 Information processing means 20 Storage means 30 Input / output interface 40,60 Recording medium 50 Program conversion table 70 Conversion data storage area

Claims (4)

Storage means for storing a program conversion table in which C language commands corresponding to ladder commands are recorded;
A program conversion processing apparatus comprising: information processing means for converting an input ladder program command into a C language command using the program conversion table and creating a C language program from the ladder program. Using a program conversion table that records C language commands corresponding to ladder commands,
A program conversion processing method, wherein an input ladder program command is converted into a C language command by the information processing unit using the program conversion table, and a C language program is created from the ladder program.   The program which operates a computer as each means of the program conversion processing apparatus of Claim 1.   A computer-readable recording medium on which the program according to claim 3 is recorded.

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