JP2740525B2 - Ladder software creation device for sequence controller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to creation of ladder software for a controller, and more particularly to an apparatus for connecting a plurality of ladder software modules.

[Related Art] Ladder software for a sequence controller is created and input to the sequence controller each time the control target changes.

Generally, the ladder software for the sequence controller is
It is composed of a plurality of parts (modules) corresponding to the contents of the target control. For example, in FIG. 5A, the modules A, B, C
Ladder software X, and in FIG. 5B, modules A 'and B' constitute ladder software Y. In addition, depending on the control target, the ladder software Z may be constructed by combining the modules A, B, and A 'as shown in FIG. 5C.

[Problems to be solved by the invention] However, if modules are simply combined,
Since the double use of the variables (coil number, register number, etc.) of the sequence controller frequently occurs, the desired function of the sequence controller cannot be satisfied.

The present invention eliminates the drawbacks of the conventional art, and makes it possible to combine the modules by changing the variables of a plurality of modules so that they do not overlap and unifying the variables to be combined and newly replacing them. The present invention provides an apparatus for creating ladder software for a sequence controller, which creates ladder software for the above.

[Means for Solving the Problems] In order to solve the above problems, a sequence controller ladder software creating apparatus according to the present invention includes a designating unit for designating a plurality of modules constituting the sequence controller ladder software. Setting means for counting the number of variables for each of the plurality of modules, specifying the head number of the variable of each module, and setting a unique number for the remaining variables, and unifying the variables to be coupled between the modules. Means for combining the plurality of modules to create ladder software for a sequence controller.

[Operation] With this configuration, the setting unit counts the number of variables for each of the plurality of modules, specifies the head number of the variable of each module, and sets a unique number for the remaining variables. By unifying variables to be connected between, by connecting multiple modules and creating ladder software for sequence controller,
Variables of a plurality of modules are not duplicated, and variables to be combined are unified, and new modules are replaced, so that the modules can be combined.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view schematically showing a method of creating ladder software according to the embodiment.

Reference numeral 17 in FIG. 1 denotes ladder software for a sequence controller for controlling a plurality of functions A, B, A ', and corresponds to the ladder software Z in FIG. 5C. Reference numerals 11, 12, and 13 denote modules of ladder software for controlling functions A, B, and A ', respectively, which are named as modules A, B, and A', respectively. Reference numerals 14, 15, and 16 in FIG. 1 indicate signals (hereinafter, referred to as interfaces) relating to the modules A, B, and A '.
As shown in FIG. 1, the modules A, B, and A 'are combined using an interface to complete the ladder software 17 for one sequence controller.

Hereinafter, a method of creating the ladder software Z by combining the modules A, B, and A 'using an interface will be described.

4A and 4B are block diagrams of a personal computer for executing the method of the present embodiment. 70 is the control unit body,
CPU 70a, ROM 70b, RAM 70c and I / O connected by bus 70e
And a controller 70d. 71 is a key input device, 72 is a display CRT, 73 is a floppy disk device as external storage, and 74 is a sequence controller.

(1) <Registration of interface files between modules of ladder software Z> FIG. 2 is a flowchart showing a method of creating an interface file according to the present embodiment. Step S20 consists of a ladder soft file and an interface file,
In this example, the module file of the ladder software Z is read from the floppy disk device 73, the variables used in the ladder software file are counted, and the contents shown in FIG.
Output on T72.

In FIG. 6, 51 is a signal to be received from another module, 52 is a signal to be passed to another module, 53 and 57 are registration areas for signal names, 54 and 58 are variable numbers used in the module ladder, and 55 and 59. Is a label designation for determining a signal response with another module, and 56 and 60 are directly designated variable numbers after linking.

Next, in step S21, if necessary, the portion is changed by key input. The end of the change is indicated by inputting the designated key <ESC>.

Next, in step S22, the changed interface is stored in the floppy disk. The registration of the newly created interface file of the ladder software Z is completed by the above procedure.

(2) <Module Combination (Link) Based on Interface Data> FIG. 3A shows a flowchart of a processing program for coupling each module. The processing program is the third
In steps S31, S32, and S33 in the figure, creation of a link command,
You can select three types of link command editing and link command linking.

In the case of creating a link command, proceed to step S34 to create a new link command, and in step S35,
According to the link command, all modules are combined, input variables and output variables are specified, and output variables in the ladder diagram are rearranged. A ladder file and an input / output file are created, and three ladder files, an input / output file, and a link command file are created. It is stored in the floppy 73 and an interface and a variable for connection of the specified module (A, B, A 'in this example) are determined.

If the link command is to be edited, go to step S36 and enter the link command file name.
Is used to change the link command, and an interface or a variable for linking modules according to the link command changed in step S38 is specified.

In the case of a link by a link command, step S39
Then, when the link command file name is input, a change is made according to the link command in step S40, and the modules are combined in step S41.

Next, the creation of the link command and the connection (link) of the module will be described in detail with reference to the detailed flowcharts of steps S34 and S35 in FIGS. 3B and 3C. When a link command creation is selected and instructed in step S31, step S34 is performed.
First, in step S50, a file name input process of the module to be combined is performed, the file specified in step S51 is loaded, the number of variables is counted, and interface data is output to the CRT 72 according to FIG. In step S52, the interface data is rewritten according to the key input, and
When ESC> is input, the flow advances to step S53 to store the interface data in the floppy 73, and the head number of the variable is specified in step S54.

Steps S50 to S54 are repeated for the module to be linked, and the creation of the link command is completed.

Next, in step S35, in creating the link command by determining the interface and the variable of the specified module,
In step S55, according to the link command, all the interface data of the module to be linked are loaded, the numbers of all the interface variables are determined, and the
To be stored. Here, the variable number is determined based on the value of the interface variable number if specified, or based on the specification of step S54 if not, and if this variable is used in another module, the interface number is determined. Change the ace variable number.

Next, in step S56, according to the interface data,
The variables of the ladder diagrams of all the modules are determined and the ladder diagrams are combined. Here, the variables in each module are changed based on the interface variable number determined in step S55 to unify the variables. In step S57, the input coil and the output coil are specified, and in step S58, the output coil is rearranged (the output coil is put at the end of the ladder diagram) if necessary. In step S59, a link command file, a ladder diagram file, and an I / O table file are created and stored in the floppy 73. Step S31
When the instruction to select the link command is given by the user, the process is terminated. Next, when the link command editing is selected and instructed in step S32, a process different from that of the flow chart of FIGS. 3B and 3C is performed. Step S50
Step 54 specifies the module file name in accordance with the link command, and step 54 determines the head number of the variable in accordance with the link command.
Step S57 is changed to a step of designating an input coil and an output coil according to the link command.

Next, when the link processing is instructed to be selected in step S33, the above change in FIGS. 3B and 3C is further performed in step S52.
Is changed to a step of changing interface data according to the link command.

7 to 11 show an example of a specific combination of ladder software according to the present embodiment.

7A and 7B are ladder diagrams of ladder software to be combined, 101 and 103 are switches, 102, 104 and 105 are relays,
Encircled circles indicate relay outputs, and others indicate contacts.

8A and 8B are interfaces displayed on a CRT corresponding to the ladder diagrams of FIGS. 7A and 7B, respectively. FIGS. 9A and 9B are modified so as to connect corresponding interfaces. here,
The contact output of relay 102 in FIG. 7A is connected to relay contact 1 in FIG. 7B.
It has been changed to use as 04.

This is combined according to the present embodiment, and when the interface and the variable are changed, the interface is changed as shown in FIG.
The ladder diagram is created as shown in FIG.

In this embodiment, a method using a personal computer has been described. However, the same function can be achieved by using a dedicated programming panel.

 As described above, according to the present embodiment, (1) Reduction of Ladder Diagram Creation Work Existing modules can be reused.

(2) Reduction of ladder diagram input mistakes Conventionally, the ladder diagram was key-input one element at a time.

(3) Reduction of input work Conventionally, key input was performed one element at a time in the ladder diagram.

[Effects of the Invention] According to the present invention, the variables of a plurality of modules can be combined with each other by avoiding duplication and unifying the variables to be combined and newly replacing them.
An apparatus for creating ladder software for a sequence controller that creates arbitrary ladder software can be provided.

[Brief description of the drawings]

Fig. 1 is a diagram showing the concept of modularization and linking of ladder software. Fig. 2 is a flowchart for registering and rewriting interface files. Fig. 3A is a flowchart for connecting modules. 3B and 3C are flow charts showing the steps S34 and S35 of FIG. 3A in detail, FIG. 4A is a block diagram of the production apparatus of this embodiment, FIG. 4B is an external view of the production apparatus of this embodiment, 5A to 5C are diagrams showing combinations of modules in the ladder software for the sequence controller. FIG. 6 is a diagram showing a display example of the interface file. FIGS. 7A and 7B are ladder diagrams of the ladder software to be combined. 8A and 8B are diagrams showing interface displays corresponding to the ladder diagrams of FIGS. 7A and 7B. FIGS. 9A and 9B are diagrams showing a modified interface for connection. , Fig. 11 is the interface of Figs. 9A and 9B. FIG. 6 is an interface and a ladder diagram of ladder software created and combined based on a change of a source. In the figure, 11... Ladder software for controlling function A, 12... Ladder software for controlling function B, 13... Ladder software for controlling function A ′, 14, 15, and 16 are inter-module correlation signals, 17. … Ladder software with functions A, B, A ′, 70… Control unit body, 70a… CPU, 70b… ROM, 70c… RAM, 70d
... I / O controller, 70e bus, 71 key input device, 72 CRT, 73 floppy disk, 74 sequence controller.

Claims (1)

(57) [Claims] 1. A designating means for designating a plurality of modules constituting ladder software for a sequence controller, and counting the number of variables for each of the designated modules.
By setting the starting number of the variable of each module and setting a unique number for the remaining variables, and unifying the variables to be combined between modules,
Creating means for creating ladder software for a sequence controller by combining the plurality of modules.