KR100817364B1 - Programmable logic controller peripheral device and program creation method thereof - Google Patents

Abstract

A peripheral device of a programmable logic controller according to the present invention includes: an instruction table which stores a command in correspondence with an input / output type of an argument of the instruction; Search discrimination means for discriminating an input / output type of an argument of an instruction by searching the instruction table for an instruction in a code of a sequence program portion selected as useful data from an existing useful source sequence program; Search result creation storage means for creating and storing a search result by combining input / output types of addresses in the code of the selected sequence program portion; Component data creating means for creating variable data by replacing the input / output type stored in the search result with a variable name, and creating component data by adding a variable name corresponding to each variable and circuit information; And parts data useful means for using the parts data at any place in the designated sequence program.

Description

Peripherals of Programmable Logic Controllers and How to Write Them {PROGRAMMABLE LOGIC CONTROLLER PERIPHERAL DEVICE AND PROGRAM CREATION METHOD THEREOF}

The present invention relates to a peripheral device of a PLC for creating and editing a sequence program of a programmable logic controller (hereinafter referred to as "PLC") and a method for creating the program.

Hereinafter, a conventional PLC peripheral device will be described.

For example, as described in Japanese Patent Application Laid-Open No. 2003-44108, a description will be given of an operation of using a sequence program portion designated by an operator from a useful source sequence program data created in the past as a useful destination sequence program in a conventional PLC peripheral device. .

First, in a useful source sequence program, an operator selects and copies a useful sequence program portion using an input device.

Next, the PLC peripheral device executes a process of copying the selected useful sequence program portion to the useful data.

The operator then attaches the selected useful sequence program portion to the insert portion during insertion of the useful sequence sequence program.

Next, the PLC peripheral device inserts a useful sequence program portion recorded in the useful data into a place designated by the operator of the utility destination sequence program.

By the above process, the useful sequence program portion of the useful source sequence program data has been completed to be useful at the place designated by the operator of the sequence program data of the useful destination.

In general, however, it is necessary to perform an operation of substituting the addresses used among the useful sequence program portions in accordance with the sequence programs of the useful destinations. This replacement operation must be performed by the operator.

In a conventional PLC peripheral device, when a new sequence program is created by reusing a previously created sequence program, a part of the previously created sequence program is copied and pasted into a new sequence program, and then an input / output address and an internal address are assigned to an operator. It was necessary to replace one by one manually. This replacement work needs to be carried out while taking into consideration the duplication of addresses and the type of input / output, and there is a problem in that it is not possible to efficiently create a new sequence program that reuses the sequence program.

In addition, when the same sequence program portion is useful for a plurality of portions or when it is useful for a plurality of new sequence programs, pasting the sequence program portion and replacing the input / output address / internal address with only the number of useful portions. There was a problem of inefficiency because it had to be repeated manually.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a PLC peripheral device and a method for creating the program, which can efficiently create a new sequence program by reusing a past sequence program with a simple operation. It is.

The PLC peripheral device according to the present invention is directed to the instruction table stored in correspondence between the instruction and the input / output type of the argument of the instruction, and the instruction table for the instructions in the code of the sequence program portion selected as useful data from the existing useful source sequence program. Retrieval determination means for determining an input / output type of an argument of an instruction in the code by searching, and a search result creation storage for creating and storing a search result by combining the determined input / output type and the address in the code of the selected sequence program portion Means and part data creation means for creating part data by substituting a variable name for the input / output type stored in the search result and adding a variable name corresponding to each variable and circuit information. And new sequence programs as useful It is to provide a part data useful means for using the part data at any place in the RAM.

Therefore, when an operation of copying a part of the existing sequence program created in the past and pasting it to a new sequence program is performed, the operator manually replaces the input / output address and the internal address that need to be replaced, thereby allowing the operator to manually input / output address / internal address. There is no need to replace the, and the new sequence program can be efficiently created by using and reusing the existing sequence program.

In addition, the PLC peripheral device according to the present invention includes a sequence program part storage means for storing the created part data as a sequence program part in a part hanger, and a sequence program part display means for displaying a sequence program part stored in the part hangar; And sequence program part selecting means for selecting a desired sequence program part from the sequence program part displayed on the sequence program part display means, and sequence program part useful means for using the selected sequence program part for the new sequence program. .

Therefore, when an operation of copying and pasting a part of an existing sequence program created in the past and attaching it to a new sequence program is performed, a part of the sequence program can be saved as a sequence program part, and the stored sequence program part can be used and reused. In this way, a new sequence program can be efficiently created.

In addition, a method for creating a program of a PLC peripheral device according to the present invention is to copy a part of an existing sequence program and attach it to a new sequence program, and has a command table stored according to an instruction and an input / output type of an argument of the instruction. A search determination step of determining an input / output type of an argument of a command in the code by searching the command table for a code in a sequence program portion selected as useful data from a useful source sequence program of the code; Creates and stores the search result by combining the addresses in the code of the selected sequence program part, and creates variable data by replacing the input and output types stored in the search result with the variable names to create variable data and information on each variable and circuit. Corresponding variable for A part data creation step of creating part data by adding a name, and a part data useful step of using the part data at any place in a new sequence program as a useful destination are included.

Therefore, when performing an operation of copying and pasting a part of an existing sequence program created in the past into a new sequence program, the operator can manually replace the input / output address / internal address by automatically replacing the input / output address and the internal address that need to be replaced. There is no need, and it is possible to efficiently create a new sequence program by using and reusing an existing sequence program.

Moreover, the program creation method of the PLC peripheral device which concerns on this invention is a sequence program component storage step which stores the said created component data as a sequence program component in a component hangar, and a sequence program component which displays the sequence program component which stored in the component hangar. A sequence program part selection step of selecting a desired sequence program part from the sequence program part displayed in the display step, the sequence program part display step, and a sequence program part useful step of using the selected sequence program part selected in the new sequence program. It will include.

Therefore, in the case of performing an operation of copying and pasting a part of the existing sequence program created in the past to a new sequence program, a part of the sequence program can exist as a sequence program part, and the stored sequence program part can be used and reused. It is possible to efficiently create a new sequence program.

1 is a system configuration diagram of a PLC peripheral device according to the present invention.

2 is a configuration diagram of a data memory of a PLC peripheral device according to the present invention.

3 is a configuration diagram of a part hangar existing in an external storage device of a PLC peripheral device according to the present invention;

4 is an operation diagram of a PLC peripheral device according to the present invention.

5 is an operation flowchart of a PLC peripheral device according to the present invention.

6 is an operation flowchart of a PLC peripheral device according to the present invention.

7 is an operation flowchart of a PLC peripheral device according to the present invention.

8 is a screen display example of a useful source sequence program and a useful destination sequence program before the sequence program is used.

9 is a screen display example of a part data confirmation screen according to the present invention;

Fig. 10 is a screen display example of a sequence program after usefulness of a sequence program according to the present invention;

11 is an operation diagram of a PLC peripheral device according to the present invention.

12 is an operation flowchart of a PLC peripheral device according to the present invention.

Embodiment 1

Preferred embodiments of the present invention will be described with reference to the drawings.

1 is a system configuration diagram of a PLC peripheral device according to the present invention. In the drawing, 1 is a PLC peripheral device body, 2 is an input device such as a keyboard, 3 is a display device such as a CRT, 4 is a printing device such as a printer, 5 is a data memory for storing a sequence program or variable data, and the like. Is a system program, 7 is a central processing unit for processing the system program, and 8 is an external storage device such as a hard disk.

FIG. 2 is a configuration diagram of the data memory 5 shown in FIG. 1. In Fig. 2, reference numeral 11 denotes a variable which is an alias generalizing an address, variable data for storing an address assigned to the variable by compiling a program described by an operator, 12 denotes useful source sequence program data created in the past, and 13 denotes a new value. Useful sequence program data to be created, 14 is search result data of an address or variable, 15 is part data for temporarily storing a part of a sequence program cut from a sequence program described by an operator in the present invention, and 16 is a useful sequence This is useful data for temporarily storing program parts.

3 is a configuration diagram of a part hangar 50 created in the external storage device 8 shown in FIG. 1. 51, 52, and 53 are sequence program parts which are parted together and stored in the part hangar 50.

4 is an operation diagram of a PLC peripheral device according to the present invention. In FIG. 4, 12 is sequence program data of a useful source. 21 is a sequence program portion selected by the operator using the input device 2 from the useful source sequence program data 12. 23 is a code in the useful source sequence program data 12. 22 is a step number corresponding to the code 23 of the useful source sequence program data 12. 25 is a code in the useful data 16. 24 is a step number corresponding to the code 25 of the useful data 16. The code 25 is made up of a combination of an instruction portion 26 and an address portion 27. 28 is an input / output type of the address 29 retrieved from the useful data 16. 30 is an instruction table describing the instruction 31 described in the sequence program and the input / output type 32 of the argument corresponding to each instruction. The instruction table 30 is included in the system program 1 of FIG. 34 denotes that the address 29 of the search result 14 is copied to the variable data 11 in order to add the variable name 33. The variable name 33 is an alias name that generalizes the address corresponding to the address 34. 35 is a part name stored in the parts hangar 50, and 36 is a part comment added to a part. 37 is an input variable created from the variable name 33 of the variable data 11, 38 is an output variable, and 39 is an internal variable. 40 is circuit information created from the useful data 16 and the variable data 11. 41 denotes a sequence program component inserted in the utility destination sequence program data 13, and 42 denotes a step number of the code 43 of the utility destination sequence program data 13.

Fig. 5 is an operation flowchart when a part of a sequence program created in the past is useful for a new sequence program in the PLC peripheral device according to the present invention.

FIG. 6 is a detailed operation sequence of a process of extracting an address / input / output type used by the PLC peripheral device of the present invention from the useful data 16 in processing step S4 and obtaining a search result 14 in the processing step S4 of FIG. 5. .

FIG. 7 is a detailed operation procedure of a process in which the PLC peripheral device of the present invention creates the part data 15 in processing step S6 of the operation sequence of FIG. 5.

8 is a circuit display example before the sequence program is used in the PLC peripheral device of the present invention.

9 is a display example of a part data confirmation screen in the PLC peripheral device of the present invention.

Fig. 10 is a circuit display example after the sequence program is used in the PLC peripheral device of the present invention.

FIG. 11 is an operation diagram when the PLC peripheral device of the present invention is useful for a new sequence program using a sequence program component already stored in the component hangar 50. In FIG. 11, 51 is a sequence program component stored in the component hangar 50 which exists in the external memory device 8. As shown in FIG. 54 is a part name of the sequence program part 51, 55 is a part comment added to the sequence program part 51, 56 is an input variable of the sequence program part 51, 57 is an output variable of the sequence program part 51, 58 is an internal variable of the sequence program component 51, and 59 is circuit information. 71 is a sequence program component inserted in the useful destination sequence program data 70.

Fig. 12 is a flowchart of operations when a sequence program component already stored in the component hangar 50 is used for a new sequence program in the PLC peripheral device of the present invention.

Next, the operation according to the present embodiment will be described using an example in which the operator designated sequence program portion 21 from the useful source sequence program data 12 created in the past is useful for the useful target sequence program data 13. .

The screen images of the PLC peripheral device displaying the utility source sequence program and utility destination sequence program before performing the process of the present invention are 60 and 61 in FIG. 8, respectively. The large template in 60 is a sequence program portion to be useful, and the large template in 61 is a portion selected by the operator as a useful destination.

In Fig. 5, first, in the utility source sequence program, the operator selects the useful sequence program portion 21 using the input device 2 and copies it (step S1).

Next, the PLC peripheral device copies the selected useful sequence program portion 21 to the useful data 16 (step S2).

Next, the operator performs an operation of attaching the selected useful sequence program part 21 to the part to be inserted in the utility destination sequence program 13 (step S3).

Next, the PLC peripheral device creates a search result 14 from the useful data 16 (step S4). The detail of process step S4 is shown in the flowchart of FIG. In the search process of processing step S4, a search is first started from the first row of the useful data 16 (step S20), and the address 27 (from the code 25 (here "LD X0") of the useful data 16) Here, "X0" is extracted and recorded in the address 29 of the search result 14 (step S21).

Next, the command 26 (here "LD") is extracted from the code 25 (here, "LD X0") of the useful data 16 (step S22), and the extracted command is stored in the system program 1 shown in FIG. By searching in the instruction 31 of the instruction table 30 prepared in the above), the address 27 (herein, "X0") is used for the code 25 (here, "LD X0") of the first line of the useful data 16. I / O type 32 (herein, “input”) is determined and recorded in the I / O type 28 of the search result 14 (step S23).

Next, it is determined whether or not the next row is in the useful data 16 (step S24), and if there is a next row, the flow advances to the next row (step S25), corresponding to all addresses used as the useful data 16. The search result 14 is completed by determining the input / output type.

After the process of creating the search result 14 from the useful data 16 (step S4 in FIG. 5) is completed, the PLC peripheral device input / output type 28 of the address 29 listed in the search result 14 is completed. In accordance with this, the variable name 33 is added to the address. Specifically, a variable name of "INPUT + number" is added to an address whose input / output type is "input", "OUTPUT + number" to an address whose input / output type is "output", and "LOCAL + number" to an address whose input / output type is "internal". Is added. In this way, the variable data 11 is created (step S5).

Next, the component data 15 is created (step S6). The detail of process step S6 is shown in the flowchart of FIG. In process step S6 of component data creation, first, a default component name (herein, referred to as "FB1") is set in the component name 35 (step S30). Next, the input variable 37 is substituted with the variable name of "INPUT + number" in the variable name 33 column of the variable data 11, and the output name 38 is the variable name 33 of the variable data 11. The variable name of "OUTPUT + number" in the column is substituted, and the variable name of "LOCAL + number" in the variable name 33 of the variable data 11 is substituted into the internal variable 39 (step S31).

Next, referring to the useful data 16 and the variable data 11, the address 27 of the code 25 of the useful data 16 is replaced with the variable name 33 (for example, the useful data 16). The address 27 of the first line code 25 "LD X0" "X0" is replaced with "INPUT1" of the variable name 33 corresponding to "X0" in the variable data 11 to be "LD INPUT1". ), The circuit information 40 is created (step S32). The component data 15 is created by performing the process steps S30 to S32.

Next, the PLC peripheral device displays the component data 15 created through the display device 3 to the operator (step S7).

The operator checks the part data 15 using the input device 2, and if necessary, the part name 35, part comment 36, input variable 37, output variable 38, internal variable 39 ) (Step S8). The screen image in this case is 62 in FIG.

Next, the PLC peripheral device executes a process that reflects the correction performed by the operator on the component data 15 (step S9). For example, in the processing step S8 of the operator, when the part name of the screen display example 62 of FIG. 9 is modified from "FB1" to "BUHIN", the PLC peripheral device of the part data 15 The part name 35 is modified from "FB" to "BUHIN".

Claims (4)

An instruction table that stores and associates an instruction with an input / output type of an argument of the instruction; Search discrimination means for discriminating an input / output type of an argument of an instruction by searching the instruction table for an instruction in a code of a sequence program portion selected as useful data from an existing useful source sequence program; Search result creation storage means for creating and storing a search result by combining the determined input / output type and the address in the code of the selected sequence program portion; Component data creating means for creating variable data by replacing the input / output type stored in the search result with a variable name, and creating component data by adding a variable name corresponding to each variable and circuit information; And Peripheral apparatus of a programmable logic controller, characterized in that it comprises a component data useful means for using the component data at any place in a designated sequence program. The method of claim 1, Sequence program part storage means for storing the created part data in a part hangar as a sequence program part; A sequence program part display device for displaying a sequence program part stored in the part hangar; Sequence program part selection means for selecting a desired sequence program part from the sequence program part displayed on the sequence program part display means; And And a sequence program part useful means for using the selected sequence program part for a new sequence program. In a method of programming a peripheral device of a programmable logic controller for copying a part of an existing sequence program and pasting it to a new sequence program, For the instructions in the code of the sequence program portion selected as the useful data from the existing useful source sequence program, the input / output type of the arguments of the instructions in the code is searched by searching the instruction table stored by associating the instructions with the input / output types of the arguments of the instructions. A search determination step of determining a; A search result creation storage step of creating and storing a search result by combining the determined input / output type and the address in the code of the selected sequence program portion; A component data creation step of creating variable data by replacing the input / output type stored in the search result with a variable name, and creating component data by adding a variable name corresponding to each variable and circuit information; And And a part data useful step of using the part data at any place in the new sequence program as a useful destination. The method of claim 3, wherein A sequence program part storing step of storing the created part data in a part hangar as a sequence program part; A sequence program part display step of displaying a sequence program part stored in the part hangar; A sequence program part selection step of selecting a desired sequence program part from the sequence program part displayed in this sequence program part display step; And And a sequence program part useful step of using the selected sequence program part selected for the new sequence program.

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