JPH083730B2 - Ladder program converter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ladder program conversion device used for sequence control of an industrial process or the like, and particularly to a ladder program conversion device.
It aims to reduce the program compilation time.

<Prior Art> A ladder is generally used as a programmable controller language used for sequence control.

Recently, many ladder CADs that operate on a personal computer are commercially available, and are shown in FIGS. 4 (a) and 4 (b).
As shown in, signal names can be arbitrarily added to contacts, internal registers, output units, and the like.

That is, when the graphic symbol is input to the personal computer to edit the ladder program, the address "DI110" specified on the personal computer is specified.
Without adding 1 "," DI1102 "," DO1201 "(Fig. 4 (a)), the user can change the signal names corresponding to these addresses to" LS1 "," LS2 ", according to the sequence control specifications. It is possible to arbitrarily add a signal name to each pixel symbol by creating a signal name file in advance by arbitrarily defining it as in OL1 "(FIG. 4 (b)).

This makes it convenient to edit and maintain ladder programs.

<Problems to be Solved by the Invention> However, such a ladder program having signal names arbitrarily set has a drawback that it takes a long time to compile for converting into an actual object file.

Compile, as shown in the flow chart of Figure 5,
Convert the signal name in the graphics file of the edited ladder program to an address, perform logical analysis based on the connection information of the symbols in the graphics file, and create an object file in parallel with the logical analysis. However, during this process, it takes 50-60% of the whole compilation time to refer to the signal name file and associate the signal name of each pixel with its actual address.

The present invention has been made paying attention to this point, and an object of the present invention is to shorten the compilation time of a ladder program and improve the overall performance.

<Means for Solving the Problem> In order to solve the above problems, the present invention associates the signal name and address of each pixel symbol when editing the ladder program, and the outline thereof is as follows.

That is, in a ladder program conversion device that converts various signal names in an edited ladder program into predetermined addresses to generate an object file of this ladder program, the various signal names and the addresses are A signal name file to be associated is created in advance, and the pixel symbols and connection information input by the user while the ladder program is being edited are stored and the various signal names input and the addresses corresponding thereto are stored in the signal. The ladder program conversion device is characterized in that a grapheme file which is immediately read from a name file and stored to form one record is created, and the object file is created only from the grapheme file at the time of compilation.

<Operation> The ladder program conversion device of the present invention refers to a signal name file created in advance at the time of editing to associate a signal name with an address to create a graphics file (source file), and at the time of compilation, Create an object file from only the grapheme file. That is, the process of associating the signal name with the address is performed at the time of editing the program and not performed at the time of compiling.

<Embodiment> FIG. 1 is a conceptual diagram of a ladder program conversion device of the present invention.

In this figure, each component is represented by a functional block.
The ladder diagram file LF, the signal name editing program SP, the signal name file SF, the compiler C, and the finally generated object file OF that are files are shown.

The user defines in advance the signal names at the addresses of the programmable controller contacts, internal registers, output section, etc., and generates the signal name / address correspondence information under the signal name editing program SP. Is created.

As shown in FIG. 3, the signal name file SF is composed of a signal name (for example, “LS1”) and an address (for example, DI1101 ”) in one record, and has a structure of a signal name / address correspondence table.

Now, when the user inputs the picture element symbols using the ladder editing program LP and combines them to start editing the ladder program, the ladder editing program LP
The address corresponding to the signal name is immediately read by referring to the signal name file SF.

When such editing work is completed, a ladder graphic file LF as shown in FIG. 2 is created.

The ladder graphic file LF consists of graphic symbol, connection information,
One record is composed of a signal name and an address.

At the time when this ladder diagram file LF is created, the address (for example, “DI” that corresponds to the signal name (for example, “LS1”) has already been generated.
1101 ") is added by referring to the signal name file SF, so when the compiler C starts to compile, signal name /
Compilation is executed without performing address corresponding processing.

That is, conventionally, one record of the ladder graphic file LF is composed of graphic symbol, connection information, and address. At the time of compilation, the signal name file SF is read and the signal name /
Address correspondence processing was performed (processing indicated by the dotted line route in Fig. 1), but this correspondence processing is performed by the ladder editing program LP.
In order to create a ladder picture element file when editing,
This process can be omitted when compiling.

Although the signal name input by the user is referred to the signal name file and the address conversion process is performed at that point, the performance itself of the ladder edit part is slightly deteriorated.
This part is the man-machine section, and it is the time that hardly affects human editing work.

It is also possible to change the signal name, and when the contents of the signal name file are changed, a separate program that reflects the contents of this signal name file in the ladder graph file LF is prepared. May be executed first and then compiled.

<Effects of the Invention> According to the ladder program conversion device of the present invention, the following effects can be obtained.

Since the correspondence processing between the signal name and the address is performed at the time of editing the program and not at the time of compiling, the compilation time of the ladder program can be shortened and the overall performance can be improved.

[Brief description of drawings]

1 is a conceptual diagram of a ladder program conversion device of the present invention, FIG. 2 is a configuration diagram of a signal name file SF, FIG. 3 is a configuration diagram of a ladder diagram file LF in the device of the present invention, FIG. 4 (a) ) And (b) are examples of ladder programs, and FIG. 5 is a flowchart of the compiling operation. LP ... Ladder editing program, LF ... Ladder diagram file, SP ... Signal name editing program, SF ... Signal name file, C ... Compiler, OF ... Object file.

Claims (1)

[Claims] 1. A ladder program is provided by converting various signal names in an edited ladder program into predetermined addresses.
In a ladder program conversion device that generates an object file of a program, a signal name file that previously associates the various signal names with the addresses is created, and a pixel symbol input by the user during editing the ladder program, At the same time as storing the connection information, the various signal names inputted and the addresses corresponding thereto are immediately read out from the signal name file and stored to create a pixel file for making one record, and at the time of compilation, the pixel file is compiled. A ladder program conversion device, characterized in that the object file is created only from files.