JP3389473B2 - Sequence program creation device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a sequence program creating apparatus for creating and managing a sequence program for a programmable controller. The present invention relates to a sequence program creation device that can be developed, modified / changed, and that can maintain a sequence program by combining and combining divided sequence program modules. 2. Description of the Related Art In a conventional programmable controller, a sequence program that operates is limited to one file. However, a recent programmable controller has an improved processing capability, a wider control range, and an increased number of operable steps. Accordingly, an environment is provided in which a sequence program can be developed by a plurality of designers by dividing the sequence program into a plurality of files and collecting the files in one folder. [0003] In such a design environment, when a sequence program for controlling one control object composed of a plurality of constituent elements is created, for example, as shown in FIG. Module M1,
A sequence program is created by dividing the program into M2 and M3, and the cross reference (memory reference information) SC
1 and 1 in one program folder 1a. When the sequence program configured as described above is changed due to a defect correction, a change in operation specifications of components, a function addition, or the like, even if only one module's sequence program is changed, another program is newly added. Since the number of folders must be increased, a plurality of program folders containing sequence programs having the same contents can be created, and there is a disadvantage that memory resources are wasted for maintenance of the sequence programs. For example, three modules M1 and M3 shown in FIG.
When modifying / changing the module M2 of the sequence program SP1 composed of M2 and M3, a program folder 2a different from the program folder 1a is provided as shown in FIG. A sequence program SP2 including M2 'and a module M3 is accommodated together with the cross reference SC2, and program folders 1a and 2a containing sequence programs (modules M1 and M3) having the same contents have been created. . If there is a defect in a sequence program commonly used in a plurality of program folders, all program folders containing the sequence program must be corrected. There was an inconvenience that many design man-hours were required due to the failure. For example, as shown in FIGS. 3A and 3C, when modifying the module M1 which is a common program, the program folders 1a and 3a in which the sequence programs SP1 and SP3 including the module M1 are stored, respectively. It needed to be modified. [0005] As described above, in the conventional sequence program creating apparatus, even when only a part of the modules constituting the sequence program is corrected, all the modules of the sequence program are modified. Memory resources are required, and when modifying a module commonly used in a plurality of sequence programs, check which sequence program uses that module, and store each sequence program. Therefore, there is a problem that a large number of memory resources and design man-hours are required to change and store the sequence program because it is necessary to make corrections to the program folder. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to facilitate the design / development and maintenance / management of a sequence program and to store the sequence program. It is another object of the present invention to provide a sequence program creating device capable of saving memory resources according to the above. SUMMARY OF THE INVENTION The present invention divides a controlled object composed of a plurality of components into modules for each component.
Relates sequence program creating device of the programmable controller which is controlled, the object of the present invention, to store a collection of modules of the component unit
A program folder that the information combination to identify the necessary modules in accordance with the components of the control target, the
From the combination information and the program folder information
A sequence program combining means for automatically creating / recreating a sequence program a plurality of modules required depending on the components of the serial control target synthesized and is achieved by providing a. FIG. 1 is a block diagram showing an example of a sequence program creating apparatus according to the present invention. In FIG. 1, a program folder 11 is an area in which each module of a sequence program divided for each component to be controlled is individually stored.
The synthesis program folder 16 is an area in which a sequence program to be executed is stored. In the present invention, 1
A program is created, modified / changed, and maintained for each module corresponding to a component (or a plurality of components) and maintained, and a combination of modules constituting a sequence program is registered and maintained as program combination information 12. In this way, the entire sequence program can be maintained and managed. Hereinafter, the present invention will be described with reference to a sequence program SP1 including three modules M1, M2, and M3 as shown in FIG. [0009] First, a designer prepares a sequence program for controlling a control object composed of three components (not shown) in a module M1 and a module M1 for each component.
2. Divide and create the module M3, and register them in the program folder 11a, the program folder 11b, and the program folder 11c, respectively. The sequence program synthesizing unit 13 reads, from a recording medium, the program combination information 12 in which the components constituting the control target are input in advance, and synthesizes the modules M1, M2, and M3 based on the program combination information 12. Then, a sequence program SP1 is created and stored in the synthesis program folder 16. Here, the program combination information used in the present invention will be described. FIG. 2 is a conceptual diagram showing an example of the program combination information 12. The program combination information 12 includes an identifier Mi for specifying each module stored in the program folder 11, a sequence program to be executed, And the corresponding data. For example, the sequence program SP1 includes modules M1 and M
2, M3, the sequence program SP2 is composed of M1, M4, M2, and the sequence program SP3 is composed of modules M1, M5.
By inputting the module configuration of SP3, the correspondence between the sequence program and its constituent modules is registered as corresponding data as shown in FIG. This program combination information 12 can be used in addition to a case where a sequence program is newly created by a combination of modules.
It is also used when modifying a sequence program, for example, when modifying a common module (a standard program or a common program) and reflecting a modified portion on a sequence program using the common module. It is also used for program version management. The cross reference regenerating means 14
Is a cross-reference SC1 which is memory reference information from the synthesized sequence program SP1 and the memory allocation information 15 of the sequence program SP1.
Generate The machine language conversion means 17 stores the sequence program SP1 stored in the synthesis program folder 16
Is converted into a machine language operated by the target programmable controller 20, a plurality of machine language files are linked, and an object file OBJ is output. The object file OBJ is transferred to the programmable controller 20 via a communication line, a removable disk, or the like. Then, the cross-reference regenerating means 14
The cross reference SC1 generated by the above is used by the programmable controller 20 for monitoring the sequence program. Note that the above-described operation relating to the creation of a sequence program is the same when modifying a synthesized sequence program. That is, the component (module)
After the corresponding module contained in the program folder 11 provided for each is modified and accommodated in the folder, the Mi (or the identifier SPj of the sequence program) of the modified module is input to instruct synthesis. For example, taking the program combination information 12 having the contents as shown in FIG. 2 as an example, the sequence program SP1
Is modified, the modules M1 and M2 of the sequence program SP1 and the modified module M3 are stored in the program folder 11a,
11b and 11c are read and synthesized, and the sequence program SP1 in the synthesis program folder 16 is updated (re-created). Then, the sequence program S updated by the cross-reference regenerating unit 14 is updated.
The cross reference SC1 is regenerated based on the memory allocation information 15 for P1. Further, for example, when the common module M1 is modified / changed, the sequence programs SP1, SP2, SP3 including the common module M1 are recognized based on the program combination information 12, and the configuration of each sequence program SP1, SP2, SP3 The modules are respectively synthesized, the sequence programs SP1, SP2, SP3 in the synthesis program folder are updated, and their cross references SC1, SC1,
SC2 and SC3 are respectively regenerated. As described above, according to the present invention, there is no need to maintain a program folder accommodating a final sequence program, and a sequence program designed for each component is individually maintained and managed. Since it is only necessary to maintain the program combination information, memory resources can be saved, and design man-hours for changing operation specifications of components and adding functions can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an example of a sequence program creating device according to the present invention. FIG. 2 is a conceptual diagram showing an example of program combination information used in the present invention. FIG. 3 is a diagram for explaining a program correction method by a conventional sequence program creation device. [Description of Signs] 11 Program folder 12 Program combination information 13 Sequence program synthesizing means 14 Cross reference regenerating means 15 Memory allocation information 16 Synthetic program folder 17 Machine language converting means

Continuation of front page (56) References JP-A-62-143136 (JP, A) JP-A-63-5430 (JP, A) JP-A-5-265732 (JP, A) JP-A-2-98706 (JP) JP-A-3-273434 (JP, A) JP-A-5-265726 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G05B 19/04-19/05

Claims (1)

(57) [Claims] [Claim 1] A control target composed of a plurality of components is required to be configured.
In a programmable controller sequence program creating apparatus for dividing and controlling each element in units of modules, a program for storing a set of modules in units of components is provided.
According to the program folder and the component to be controlled
Combination information specifying the required module and the combination
From the program information and the program folder information.
A sequence program synthesizing device, comprising: sequence program synthesizing means for synthesizing a plurality of necessary modules according to a component to be controlled and automatically generating / re-creating a sequence program.