JPH05143118A - Controller system - Google Patents

Abstract

PURPOSE:To reduce complexity in the development or change of a control program by describing the whole programs in a controller system on the top and down parts and executing the succeeding processing by distributing/ executing a control program by the function of the controller system itself. CONSTITUTION:A control program designer describes the whole programs in a controller group by an integrated programming means 1. In the case of describing plural languages, for the whole description, ranges to be described are divided by using respective languages at first and order relation for executing the divided parts is described. Then the control contents of the divided parts are detailedly described by means of respective proper languages. An overall managing means 2 inputs the program and distributes the programs in the detail description part to plural program execution means 31 to 33 corresponding to respective languages. Each controller inputs is driven by using a connection means 4 so as to input a corresponding program from the means 2, execute the inputted program and inform an execution result to the means 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller system suitable for controlling a device or a manufacturing line used in a manufacturing workplace. In particular, it relates to a unified development method of a control program of a controller system and a program execution method.

[0002]

2. Description of the Related Art As a controller system for controlling an apparatus or a manufacturing line, there is a programmable controller system (PCS) found in, for example, JP-A-1-276308. PCS has a ladder language for condition control and an SFC language for sequence control, but each has an independent programming system, and the programming system for intelligent modules is also an independent system. For this reason, a special control signal is provided for interfacing between languages, and each program is described. The program execution method in the controller is a method of executing one program downloaded in advance, and is not a mechanism for dynamically changing and executing a subprogram. For this reason, it is the current situation that the entire status of the control system is reflected in the programs of all the controllers. This is pointed out as one of the factors that complicate the creation and modification of the control program of the controller system. The SFC language enables multilingual mixed description, which is being standardized by the IEC, but has not yet been effectively realized.

[0003]

The object of the present invention is suitable for reducing the complexity at the time of developing or changing the control program of the system composed of a plurality of controllers, which is a problem of the above-mentioned prior art. Another object of the present invention is to provide a controller system including a unified development method of a control program and an execution method therefor.

[0004]

In a controller system, a control program is created by dividing a description range for each of a plurality of different languages, and an overall description that describes the relationship between the divided ranges and control of the divided range. A unified programming means is provided between the controllers for performing the hierarchical description with the detailed description for describing the content in each language. Further, a language-compliant program executing means for inputting and executing each detailed description part in the created program and outputting the execution result is provided. Furthermore, a program is inputted from the program developing means, and a managing means for sequentially distributing the corresponding detailed processing parts in the program to the program executing means for each language according to the whole description part and a connecting means for connecting the respective means. And.

[0005]

The creator of the control program has the unified programming means to describe the program for the entire controller group. When describing in multiple languages, first divide the range to be described in each language as the overall description,
Describe the order relationship in which the divided parts are executed. Next, the control contents of the divided parts will be described in detail by using each suitable language. The overall management means inputs this program, and distributes the program of the detailed description part to the program execution means corresponding to the language according to the overall description part. Each controller operates by using the connection means so as to input and execute the corresponding program from the general management section and report the execution result to the general management section, so that the creator of the control program differs for each program execution means. A control program for a controller system can be created by describing the processing contents of the entire control system in a language-compatible manner without using programming means or extracting and describing all processing contents for each program execution means. Become.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of the configuration of a controller system according to the present invention. Reference numeral 1 is a unified programming means, 2 is an overall management means, and 3 _{1 to} 3 ₃ are means for executing language corresponding programs. Here, 3 _{1 to} 3 ₃ are ladder program execution means, C program execution means, and BASIC, respectively.
It is used as a program execution means. The respective means are connected by a connecting means 4 such as a system bus or a network. Consider the case of controlling a controlled object with the controller system of this configuration. First, the control function of the controlled object is divided, and the language to describe each is determined. In addition, describe the connection relationship between these divided control functions. This result is called the overall description of the controlled object, an example of which is shown in the left diagram of FIG. It is described using SFC. White box 5 in this figure
₁ the ladder described control functions, the hatched box 5 ₂ expresses the C language describing control functions. Next, the contents of the box and the implementation method of the control function will be described in detail in each planned language.
The case of a ladder is illustrated in the right diagram of FIG. As described above, the programmer programs the function to be controlled by using a language that is easy to describe. The type of the execution means and the number of execution means are selected in consideration of the language used at this time, the processing amount of the described control contents, and the like, and the configuration of the controller that realizes this is selected. In other words, this is a method of programming focusing on the control content of the control target. FIG. 3 shows an example in which the execution means suitable for the present programming method and the execution method of the management means are message driven. Management means refers to the entire description of the program of FIG. 2, to confirm the establishment of the execution conditions of the control function _(71). When established, the program of the corresponding detailed description part is extracted from the memory and distributed to the corresponding execution means (7 ₂ , 8 ₁ ). At this time, when there are two or more executing means of the corresponding language, the corresponding means is distributed to the waiting means. After that, the overall management means outputs the execution result report from the previous execution means to the corresponding execution means as the start information in the connection relationship (7 ₃ , 8 ₂ ). In response to this, the execution means executes the program (8 ₃ ), and at the end, reports the execution result to the overall management means (8 ₄ , 7 ₄ ). The overall managing means stores it in the memory as the startup information of the next connection relationship. In this way, the programmer focuses on the control contents of the control target, writes the entire program of the controller system in top-down, and the subsequent processing is distributed and executed by the control system by the function of the controller system itself. Can be controlled.

[0007]

According to the present invention, the entire program of the controller system is described from the top down, paying attention to the control content of the controlled object, and the subsequent processing is distributed and executed by the function of the controller system itself. Since the target can be controlled by doing so, the integration of the programming system of the execution means of the programs of multiple languages can be realized. In addition, the program is developed as a collection of disjoint modules by the message-driven execution method.
Since it can be executed and the execution means independent execution of the module can be realized, the development change of the program becomes easy.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a controller system.

FIG. 2 is a diagram showing a programming method of a controller system.

FIG. 3 is a diagram showing a method of executing a program.

[Explanation of symbols]

1 ... Unified programming means 2 ... Overall management means 3 _{1 to} 3 ₃ ... Language corresponding program execution means 4 ... Connection means 5 ... Overall description example 5 ₁ ... Ladder language description control function 5 ₂ ... C language description control function 6 ... Detailed description Example 7: Execution method of overall management means 7 ₁ ... Execution condition determination function of program execution means 7 ₂ ... Program transfer function 7 ₃ ... Startup information transfer function 7 ₄ ... Execution result collection function 8 ... Execution method of language-compatible program execution means 8 ₁ … Program input function 8 ₂ … Startup information input function 8 ₃ … Program execution function 8 ₄ … Execution result reporting function

Claims (3)

[Claims] 1. When creating a control program for a controller system, a description range for each of a plurality of different languages is divided, and an overall description that describes the relationship between the divided ranges and control contents of the divided range are written in each language. A unified programming means for creating a program by a hierarchical description of the detailed description to be described, a program execution means corresponding to a language for inputting and executing each detailed description part in the created program, and an execution result, and a program development means A program is input from the above, and according to the whole description part, it is composed of a whole managing means for sequentially distributing corresponding detailed processing parts in the program to a program executing means for each language, and a connecting means for connecting the respective means. Controller system characterized by. 2. The entire description according to claim 1, which divides the description range for each different language and describes the relationship between the divided ranges, and a detailed description that describes the control contents of the divided range in each language. A unified program development method for a controller system, characterized in that a control program for a plurality of controllers is created by the hierarchical description of. 3. The program according to claim 1 or 2, wherein the overall management means distributes the program of the program execution means according to the overall management part of the program hierarchically described, and the program execution means provides a detailed description part of the distributed program. A method of executing a control program of a controller system, which comprises executing a program and sequentially executing programs written in a plurality of languages by reporting the execution result to an overall management unit.