JPH03102501A - System for preparing function element for direct digital control - Google Patents

Abstract

PURPOSE:To simply express a complicated logic diagram as well without passing it through a procedure language, to process it in the form of a function element and to easily maintain a device by defining a user definition element by the logic diagram while including even an arithmetic instruction as well. CONSTITUTION:The logic diagram shows a signal, which is outputted from an input signal block 1, to be connected with a control block 2 by a connection line 3 and an arrow 4 and to reach an output signal block 5. In the partial control block, a parameter 6 exists. The input signal block 1 shows the kind of the arrow as the function element by a figure in a frame. An output signal block 2' shows the order of an output connection line. The parameter 6 is shown by the figure or an alphabet and goes to be the parameter to be identified by respective names. In the logic diagram, the function element is displayed under the same rule as the general control block.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for creating functional elements that is applied, for example, to direct digital control of motor products.

[Prior Art] FIG. 3 is a conceptual diagram of a system of a direct digital control device (DDC).

The direct digital control device interprets the logic diagram created by the logic diagram drawing section], executes the operation in the control operation execution section 12, and has an operation instruction description section 3 written in a procedural language.

When a certain set of control blocks is frequently used, it is more concise to define the set as a new control block (called a user-defined element) and use the user-defined element to represent the control block diagram. .

At this time, the liquidation instructions to be written in the user definition elements are created each time by the arithmetic instruction description section 13 using a procedural language.

The programming procedure for such a conventional DDC is as follows.
It is as follows.

First, a logic diagram consisting of the connection relationships of functional blocks is created according to the language flow.

At this time, use standard elements for function blocks as much as possible, or use ``functions that are difficult to express with standard elements'' or ``functions that introduce standard elements in a complex manner'', and whether they are the same function or within the logic diagram. If it appears many times, a new symbol representing the function should be written instead of a standard element as a function block, and an explanation of the function should be written in the margin or on a separate sheet. This is intended to easily display difficult logic based on complex combinations of standard elements and to make logic diagrams visually clear.

Such cases are becoming more common as DDCs become larger and their control performance becomes more sophisticated.

When the logic diagram is created as described above, the computer performs programming by drawing the logic diagram on a graphic CRT using a mouse, a keyboard, or the like. In other words, the user creates data for the control calculation execution section 12 using the logic diagram creation section 1 shown in FIG.

If the logic diagram has only standard elements, programming is completed with the above steps.

However, when a new symbol other than the standard element is used as described above, it is necessary to perform either (1) or (2) below.

(1) The user develops a new symbol into an introduction combination of standard elements, and draws it on a graphic CRT as a Ronck diagram containing the introduction combination of standard elements every time there is a new symbol.

(2) Procedural language (for example, FOR TRAN)
Describe and register the IR calculation contents.

(]) turns the logic diagram into a compound interest/sword solution as mentioned above. In addition, (2) requires modification of the arithmetic instruction description part 13 in Figure 3 (a part that the user is generally not concerned with), and unless the user is familiar with the procedural language, the system programmer will have to deal with it. It turns out.

[Problems to be Solved by the Invention] Conventional methods for creating user-defined elements have used procedural languages as described above, requiring the user to learn the procedural languages. In order to solve the problems mentioned in section 2, the present invention defines user-defined elements, including operation instructions, in a logic diagram.

[Means and effects for solving the problem] In the present invention, when there is a new symbol as described above, a logic diagram showing the function 3 of the new symbol is created by combining standard elements, and it is created as a user-defined element. register.

Registration of user-defined elements is performed by drawing a logic diagram representing the element name, symbol, and function of the element on a graphic CRT.

Such user-defined elements may be reproduced or registered for the same function. A logic diagram that uses this function is drawn on a CRT using symbols (symbols are specified by selecting one from a menu displayed on the CRT screen when using user-defined elements).

Logic diagrams representing the functions of user-defined elements are managed as data separate from general data, and are automatically expanded when a logic diagram using user-defined elements is programmed in a computer. All data in the above is data that combines and connects standard elements.

Hard configuration is defined at the time of programming a user-defined element,
The same is true at the time of registration.

[Example of failure] 4 Figure 1 is a logic diagram showing a method for creating a functional element (user table element) according to an embodiment of the present invention, and Figure 2 is a logic diagram using the functional element. Yes, all of them are created and displayed in the logic diagram creation section.

The logic diagram shows that the signal coming from the input signal block 1 is connected to the control block 2 by a connecting line 3 and an arrow 4 and reaches the output signal block 5. Some control blocks have parameter 6.

Input signal block 1 in FIG. 1 indicates the type of arrow as a functional element by the number in the frame 1, output signal block 2
'' indicates the order of the output connection line as a functional element by the number in the frame, and parameter 6 indicates that the parameter specified by a number is a parameter that is fixed to that value as a functional element, and is indicated by an alphabetic character. Indicates that the specified parameter is a functional element identified by its alphabetical name.

Functional elements are represented in the logic diagrams used according to the same rules as general control blocks. In FIG. 2, the functional element 7 is used in two places, and the parameter is indicated by the functional element parameter 8.

In FIG. 2, DH1 and DH2 of the functional element 7 are elements with the same function, which is only parameters, and DH1 and DH2 are elements with the same function, which is only a parameter.
Becomes a user-defined child.

In order to realize this function, in the conventional technology, a user writes and registers the description shown in FIG. 4 in a procedural language (for example, FORTRAN).

When the functional elements in FIG. 2 are expanded, the configuration is as shown in FIG. 5. The part indicated by the dotted line in this figure is the part conventionally described as shown in FIG.

In the present invention, a logic diagram as shown in FIG. 1, which is the dotted line portion, is created on a graphic CRT, and this is registered in a computer and stored. In addition, a device that can develop the registered functional elements into a logic diagram is provided, and this device is used to interpret the developed logic diagram and perform control calculations.

Because you can interpret multiple logic diagrams without going through a procedural language, you can interpret multiple logic diagrams with f! i'i jl'i-
It is possible to handle the shape of functional elements.

[Effects of the Invention] As mentioned above, by defining the operation instructions of functional elements in a logic diagram, procedure statement 1:! Multiple logic diagrams are also effective in terms of concise representation and direct maintenance of digital equipment.

[Brief explanation of drawings]

FIG. 1 is a logic diagram showing a method for creating functional elements, FIG. 2 is a logic diagram using functional elements, and FIG. 3 is a system conceptual diagram of a direct digital control device. FIG. 4 is a graph of descriptive words expressing functional elements, and FIG. 5 is an expanded view of the functional elements of the logic circuit of FIG. 2.

Claims (1)

[Claims] The entire set logic that can be processed as a single functional element is
A control logic diagram created by drawing a graphic CRT as an individual functional element, registering the drawn control logic diagram, developing a device to develop the registered functional element into a control logic diagram and interpreting it, and thereby registering the control logic diagram. A direct digital control functional element creation method characterized by automatic control and calculation based on