KR102095224B1 - Apparatus for providing program and cpu module processing execution of the program of the same - Google Patents

Abstract

The present invention is a program providing apparatus of a PLC system, a plurality of editing units corresponding to different programming languages, and one or more program blocks consisting of a main code and at least one subroutine code by any one of the plurality of editing units are combined. It provides a program providing apparatus including a program providing unit for providing a program, and a subroutine list providing unit for providing a list for the at least one subroutine code.

Description

A program providing device and a CPU module that processes execution of a program therefor. {APPARATUS FOR PROVIDING PROGRAM AND CPU MODULE PROCESSING EXECUTION OF THE PROGRAM OF THE SAME}

The present invention relates to a program providing device and a CPU module of a PLC system, and to a program providing device providing a program for implementing a monitoring function and a control function, and a CPU module processing execution of the program.

In implementing an automated facility, relays and counters for sequentially connecting control target devices that perform each process according to the order of the process are being replaced by PLC systems.

The PLC system is a device that controls the sequential driving of control target devices according to the process sequence set by the user. When implementing an automated facility using such a PLC system, there is an advantage in that it is possible to easily change, add, and delete the order of processes.

In general, a PLC system includes a program providing device for providing a program for implementing various functions for controlling and monitoring the sequential driving of control target devices, and a CPU device for executing the program.

The program of the PLC system may include a function that is repeated two or more times. In this regard, IEC 61131-3, a standard related to PLC programming, sets a user function and a user function block. That is, the main code of the program may include a command that calls a user function (or user function block) for a frequently used function (or operation). In this way, program complexity and errors can be reduced compared to writing functions (or operations) that are repeatedly arranged in code.

However, the variable setting of the user function (or user function block) is performed separately from the main code. Accordingly, in order to call a user function (or user function block), variables according to the main code are transferred to the input parameters of the user function (or user function block), and the output parameters of the user function (or user function block) are returned to the main code. The delivery process is essential.

Since the delay time is generated by the process of transferring the input parameters and the output parameters, there is a problem in that the execution period of the program is shortened.

The present invention provides a program providing apparatus capable of shortening the execution period of a program and a CPU module for executing the program.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

In order to solve this problem, an example of the present invention, in a program providing apparatus of a PLC system, a plurality of editing units corresponding to different programming languages, a main code by at least one of the plurality of editing units and at least one sub It provides a program providing unit including a program providing unit for providing a program in which one or more program blocks composed of routine codes are combined, and a subroutine list providing unit for providing a list for the at least one subroutine code.

Each subroutine code is called twice or more in the main code of each program block based on a predetermined instruction.

The main code of each program block includes an instruction to call at least one of at least one subroutine code disposed in the same program block as the main code.

Alternatively, the main code of each program block includes an instruction to call at least one of at least one subroutine code disposed in a program block different from the main code.

The subroutine list providing unit provides the subroutine list while the main code is written by any one of the plurality of editing units.

When a new subroutine code is created by one of the plurality of editing units, the subroutine list providing unit updates the subroutine list based on the notification of the one editing unit.

The plurality of editing units include an LD editing unit providing a code editing function based on a ladder diagram (LD) language, an ST editing unit providing a code editing function based on a structured text (ST) language, and a code editing based on an instruction list (IL) language It includes an IL editor that provides functions.

Further, another example of the present invention further provides a CPU module including a CPU unit for processing execution of a program by the program providing device, and a memory unit for holding data necessary for processing the CPU unit.

The memory unit includes an OS ROM area that holds a library of operating programs and arithmetic and control functions, a program area that holds a program in a machine language state provided by the program providing device, and a programming language state that is provided by the program providing device. It includes an upload area for holding a program, data for input and output data of the CPU unit, and a data area for holding the calculation result by the CPU unit. Here, the OS ROM area holds the subroutine list by the subroutine list providing unit of the program providing device.

The CPU unit detects that a program held in the program area of the memory unit includes a subroutine code based on a list of subroutines held in the OS ROM area of the memory unit. When the CPU unit detects an instruction to call the subroutine code while executing the main code of each program block included in the program held in the program area of the memory unit, the program retained in the program area of the memory unit Among them, any one subroutine code corresponding to the instruction is executed.

The above-described program providing apparatus provides a program in which one or more program blocks composed of a plurality of editing units corresponding to different programming languages and a main code and at least one subroutine code by one of the plurality of editing units are combined. Includes a program provider. Here, each subroutine code is called twice or more in the main code of each program block based on a predetermined instruction.

That is, the subroutine code, like the main code, is generated by any one of a plurality of editing units and corresponds to a function repeatedly arranged in the main code.

Due to the subroutine code, the complexity of the program and the increase in errors due to a function repeatedly disposed in the main code can be prevented while excluding the user function or the user function block. In addition, since the delay time due to the call of the user function or user function block can be prevented, the execution period of the program can be shortened.

1 is a view showing a PLC system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating the CPU module of FIG. 1.
3 is a view showing a program providing device among the peripheral module of FIG.
4 is a view showing an example of any one program block by the program providing apparatus of FIG. 3.
5 is a diagram showing an example of calling a user function.
FIG. 6 is a diagram showing an example of a subroutine code of a program block by the LD editor of FIG. 3 and an instruction of a main code calling it.
7 is a diagram showing an example of a subroutine code of a program block by the IL editor of FIG. 3 and an instruction of a main code calling it.
8 is a diagram illustrating an example of a subroutine code of a program block by the ST editor of FIG. 3 and a command of a main code calling it.

The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, and accordingly, a person skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, a program providing apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIGS. 1 and 2, a PLC system including a program providing apparatus according to an embodiment of the present invention will be described.

1 is a view showing a PLC system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the CPU module of FIG. 1.

As shown in FIG. 1, the PLC system 10 according to an embodiment of the present invention may include a peripheral device module 11, a CPU module 12, a power supply module 13, and an input / output module 14. .

The CPU module 12 performs an operation for program execution and stores the operation result in memory. In addition, the CPU module 12 may include various communication functions and functions for controlling the entire system.

The power module 13 supplies power for driving each of the modules 11, 12, and 14.

The peripheral module 11 creates a user program and monitors various calculation results and status.

The input / output module 14 receives data from an external input device, and outputs calculation data or collected data by the CPU module 12.

As shown in Fig. 2, the CPU module 12 holds data necessary for the processing of the CPU unit 121 and the CPU unit 121 that process execution of various calculation functions and control functions corresponding to the program of the PLC system. It includes a memory unit 122. In addition, the CPU module 12 may further include a peripheral circuit unit 123 that performs data backup and supplies a reset signal.

The memory unit 122 is provided by a program providing device (11 'in FIG. 3) of the OS ROM area 122a, the peripheral device module 11, which holds an operating program, a library related to arithmetic and control functions, and is in a machine language state. The program area 122b holding the program of the PLC system, the upload area 122c holding the user program in the programming language state by the program providing device (11 'in Fig. 3), and the input / output data and CPU of the CPU section 12 And a data area 122d holding various calculation results by the unit 12.

Next, a program providing apparatus for providing a user program to the CPU module 12 of the peripheral module 11 of FIG. 1 according to an embodiment of the present invention will be described with reference to FIGS. 3 to 8.

3 is a view showing a program providing device among the peripheral module of FIG. 4 is a view showing an example of any one program block by the program providing apparatus of FIG. 3.

5 is a diagram showing an example of calling a user function.

FIG. 6 is a diagram showing an example of a subroutine code of a program block by the LD editor of FIG. 3 and an instruction of a main code calling it. 7 is a diagram showing an example of a subroutine code of a program block by the IL editor of FIG. 3 and an instruction of a main code calling it. 8 is a diagram illustrating an example of a subroutine code of a program block by the ST editor of FIG. 3 and a command of a main code calling it.

3, the program providing apparatus 11 'according to an embodiment of the present invention includes a plurality of editing units 111, a program providing unit 112, a subroutine list providing unit 113, and a compiling unit ( 114).

The plurality of editing units 111 correspond to a plurality of different programming languages defined by IEC 61131-3.

For example, the plurality of editing units 111 include an LD editing unit 111a providing a code editing function based on a ladder diagram (LD) language, and an ST editing unit 111b providing a code editing function based on a structure text (ST) language. And an IL editing unit 111c that provides a code editing function based on an IL (Instruction List) language.

Alternatively, the plurality of editing units 111 may include an FBD editing unit 111d providing an FBD (Function Block Diagram) language based code editing function and an SFC editing unit 111e providing an SFC (Sequential Function Chart) language based code editing function. It may further include.

Alternatively, the plurality of editing units 111 may further include code editing functions based on other programming languages that are not defined by IEC 61131-3 but can be applied to PLC programming.

According to an embodiment of the present invention, the program block by any one of the LD editor 111a, the ST editor 111b, and the IL editor 111c may include at least one subroutine code. That is, the program block by any one of the FBD editing unit 111d and the SFC editing unit 111e may not include a subroutine code.

The program providing unit 112 provides a program in which one or more program blocks by any one of the plurality of editing units 111 are combined. Here, each program block is created by any one of a plurality of editing units 111, and is composed of a main code and at least one subroutine code.

For example, as shown in FIG. 4, the program block PB created by any one editing unit 111 includes a main code area MCA in which main codes are arranged and subs in which at least one subroutine code is arranged. It may include a routine code area (SCA). Here, the subroutine code area SCA may be disposed at the rear end of the main code area MCA. That is, after the termination command of the main code, a subroutine code may be arranged.

Each subroutine code refers to a function (or operation) that is called twice or more repeatedly in the main code of each program block based on a predetermined instruction. The subroutine code will be described in detail below with reference to FIGS. 5 to 8.

In addition, any one program may include two or more program blocks written in different languages.

At this time, the main code of each program block may include an instruction to call at least one of at least one subroutine code disposed at the rear end of the main code in the same program block as the main code. That is, the main code can call subroutine codes written in the same programming language.

Alternatively, the main code of each program block may include an instruction that calls at least one of at least one subroutine code disposed in a different program block from the main code. That is, the main code may call subroutine codes written in a different programming language.

To this end, the program providing device 11 'includes a subroutine list providing unit 113.

The subroutine list providing unit 113 provides a list of at least one subroutine code arranged in each program block.

For example, when a new subroutine code is created in each editing unit 111, the subroutine list providing unit 113 updates the subroutine list based on the notification of each editing unit 111.

Then, the subroutine list providing unit 113 provides a subroutine list while code is being written in any one editing unit 111. Accordingly, the program creation manager can easily select the subroutine to be called in the main code based on the subroutine list. Accordingly, the ease of programming can be improved.

The compilation unit 114 converts the program by the program providing unit 112 into machine language.

Then, the compilation unit 114 of the program providing device 11 'provides a program converted into machine language to the CPU module (12 in FIG. 1) of the PLC system. Thus, the program converted into machine language is disposed in the program area 122b of the memory unit 122 of the CPU module 12.

In addition, the program providing unit 112 of the program providing device 11 'provides a program written in at least one programming language to the CPU module 12. Accordingly, a program in a programming language state may be disposed in the upload area 122c of the memory unit 122 of the CPU module 12.

Here, the program delivered to each of the program area 122b and the upload area 112c includes at least one program block, and at least one of the at least one program block includes a subroutine code area (SCA in FIG. 4). do. That is, the subroutine code in the programming language state is held in each of the program area 122b and the upload area 112c, like the main code.

Further, the subroutine list providing unit 113 of the program providing device 11 'provides the subroutine list to the CPU module 12. Accordingly, a subroutine list may be disposed in the OS ROM area 122a of the memory unit 122 of the CPU module 12. As a result, the system manager and the CPU module 12 can easily detect that the corresponding program includes a subroutine code.

That is, when a program having a form including a main code and a subroutine code is transferred to the CPU module 12, the CPU unit 121 is based on a list of subroutines held in the OS ROM area 122a. ), It can be detected that the program held in the program area 122b includes a subroutine code.

Then, the CPU unit 121 executes at least one program block included in the program held in the program area 122b of the memory unit 122. As described above, when an instruction for calling a subroutine code is detected while executing the main code of each program block, the CPU unit 121 may correspond to any of the programs held in the program area 122b of the memory unit 122. Execute one subroutine code.

Further, a program in the programming language state is held in the upload area 122c of the memory unit 122 of the CPU module 12, and the subroutine list by the subroutine list providing unit 113 is the OS of the memory unit 122. By being held in the ROM area 122a, it can be easy for the system administrator to modify or re-edit the program or recycle the code of the program.

As shown in FIG. 5, the main code (LD program; left of FIG. 5) of a program written in LD programming language may include a command that calls a user function (CC; right of FIG. 5). In this case, the user function (CC) is composed of variables declared differently from the LD program according to the standard, so when the LD program is executed, the input parameters are transmitted to the user function (CC) and the operation of the user function (CC) The process of receiving the output parameter according to is essential. Therefore, since the delay time due to the transmission of the parameter is indispensable, it is difficult to shorten the execution period of the program.

On the other hand, the main code of the program block according to an embodiment of the present invention calls a subroutine code written in the same declared variable. Accordingly, when the program is executed, transmission of parameters between the main code and the called subroutine code is unnecessary, so that the execution period of the program can be shortened compared to the case of using a user function.

As shown in FIG. 6, in a program block written in LD programming language, after an instruction (END) indicating the end point of the main code, an instruction (SBRT sub) indicating the start point and name of the subroutine code Routine name). Subsequently, after the operation of the subroutine code is written, an instruction (RET) indicating the end point of the subroutine code may be disposed.

In addition, the main code may include an instruction of "CALL subroutine name" to call a predetermined subroutine code. At this time, the name of the subroutine may be selected based on the subroutine list by the subroutine list providing unit 113.

Alternatively, as shown in FIG. 7, in a program block written in the IL programming language, an instruction indicating the starting point and name of the subroutine code after the instruction (END) indicating the end point of the main code (SBRT subroutine name) ) May be disposed. Subsequently, after the operation of the subroutine code is written, an instruction (RET) indicating the end point of the subroutine code may be disposed.

In addition, the main code may include an instruction of "CALL subroutine name" to call a predetermined subroutine code.

Or, as shown in FIG. 8, in a program block written in the ST programming language, after an instruction (END_PROGRAM) indicating the end point of the main code, an instruction indicating the start point and name of the subroutine code (SBRT subroutine) Name). Subsequently, after the operation of the subroutine code is written, an instruction (END_SBRT) indicating the end point of the subroutine code may be disposed.

In addition, the main code may include an instruction of "CALL subroutine name" to call a predetermined subroutine code.

The above-described invention, the above-described embodiments and the accompanying drawings because it is possible for a person having ordinary skill in the art to which the present invention pertains, various substitutions, modifications and changes are possible without departing from the technical spirit of the present invention. It is not limited by.

10: PLC system
11 ': Program providing device
PB: Program block
MCA: Main code area
SCA: Subroutine Code Area

Claims (13)

In the program providing device of the PLC system,
A plurality of editing units corresponding to different programming languages;
A subroutine list providing unit that provides a subroutine list corresponding to the subroutine codes created by the plurality of editing units; And
And a program providing unit providing a program in which one or more program blocks each including a main code by any one of the plurality of editing units are combined,
The main code of each of the one or more program blocks is written by any one of the plurality of editing units and includes a command for calling at least one of subroutine codes corresponding to the subroutine list.
According to claim 1,
Each of the subroutine codes corresponding to the subroutine list is prepared by any one of the plurality of editing units, and the program providing device is called twice or more in the main code of the one or more program blocks.
According to claim 1,
The main code of any one of the one or more program blocks is disposed in the one of the program blocks, and the program includes an instruction to call at least one of one or more subroutine codes written by the same editing unit as the one of the main code Provision device.
According to claim 1,
The main code of any one of the one or more program blocks is disposed in a program block different from the one of the program blocks, and a command to call at least one of the one or more subroutine codes written by the editing unit different from the one of the main code Program providing device comprising a.
According to claim 1,
The subroutine list providing unit provides the subroutine list while the main code is written by any one of the plurality of editing units.
According to claim 1,
When a new subroutine code is created by any one of the plurality of editing units, the subroutine list providing unit updates the subroutine list based on the notification of the one editing unit.
According to claim 1,
The plurality of editing units
LD (Ladder Diagram) LD editor that provides language-based code editing function;
ST (Structures Text) ST editor that provides language-based code editing function; And
A program providing device including an IL editing unit providing an IL (Instruction List) language-based code editing function.
The method of claim 7,
The plurality of editing units
FBD editing unit that provides code editing function based on FBD (Function Block Diagram) language; And
SFC (Sequential Function Chart) A program providing device further comprising an SFC editor that provides language-based code editing.
According to claim 1,
And a compilation unit for converting the program of the program providing unit into machine language.
The method of claim 9,
The compilation unit provides the program converted into the machine language to the program area of the memory unit of the CPU module provided in the PLC system,
The program providing unit provides the program to the upload area of the memory unit of the CPU module,
The subroutine list providing unit provides the subroutine list to the OS ROM area of the memory unit of the CPU module.
A CPU unit that processes execution of a program by the program providing device according to any one of claims 1 to 9; And
A CPU module including a memory unit for holding data necessary for processing the CPU unit.
The method of claim 11,
The memory unit
An OS ROM area holding a library of operating programs and arithmetic and control functions;
A program area holding a program in a machine language state provided by the program providing device;
An upload area for holding a program in a programming language state provided by the program providing device; And
And a data area holding input / output data of the CPU unit and a result of the calculation by the CPU unit,
The OS ROM area is a CPU module that holds the subroutine list by the subroutine list providing unit of the program providing device.
The method of claim 12,
The CPU unit
Based on the list of subroutines held in the OS ROM area of the memory unit, it is detected that the program held in the program area of the memory unit includes a subroutine code,
If an instruction to call the subroutine code is detected while executing the main code of each program block included in the program held in the program area of the memory unit, the command corresponds to the command among programs held in the program area of the memory unit CPU module that executes any one subroutine code.

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