JPH0484328A - Program creation device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a program creation device for a plant controller.

[Conventional technology]

When creating a program, program creation information is input from the input section of the program creation device, a source program for the target machine is created from the information, and a load module is created by converting and combining the source programs. The process of inputting programs used to be inputting source programs, but from the standpoint of software productivity and maintainability, the process has changed to inputting in high-level languages. When it comes to plant controllers, it is rare to write the program source code, and the logic is expressed using graphic symbols such as ladder sequences, logic charts, and block diagrams.

For example, processing specifications as disclosed in Japanese Patent Application Laid-Open No. 63-62036 are input, and a source program is created from there.

The program input device is designed to allow input and modification display in the form of ladder sequences and logic charts, and has a conversational interface. Then, the input ladder sequence and the like are analyzed to generate a source program for the plant controller. Since the source program depends on the instruction word system of the target plant controller C (hereinafter referred to as the target machine), the program creation device has a very close relationship with the target machine.

Problems to be solved by the invention C] In the above conventional technology, the programming device itself must be changed in response to a change in the target machine.
The problem was that sufficient consideration was not given. As plant controllers become more sophisticated and diversified, the target machines that control them are required to have higher processing capabilities. To cope with this, new microprocessors are being created one after another and are used as processing units in target machines. However, when a new microprocessor is adopted, the conventional programming device is also tightly coupled to the target machine and must be modified accordingly. Also, at that time, the stored software becomes unusable and must be ported to a new target machine.

SUMMARY OF THE INVENTION An object of the present invention is to provide a program creation device that can reuse stored software as is with minimal changes to the program creation device when a target machine changes.

[Means to solve the problem]

In order to achieve the above-mentioned invention, the present invention provides a program source (hereinafter referred to as "next source program") expressed by logical formulas and arithmetic formulas that do not depend on the command language system of the target machine, rather than information for redisplaying program creation information. ) and a means for converting the -next source program into the source program of the target machine, and when changing the target machine, only the part that realizes the means for changing to the latter source program is changed. This is how it was done.

[Effect]

The means for creating a primary program that does not depend on the target machine (hereinafter referred to as the "next program generation section") is based on the program creation information, that is, the ladder sequence, block diagram, and logic chart information input from the input section. A primary source program corresponding one-to-one is generated. A means for generating a source program for the target machine from the -next program (hereinafter referred to as a source program generation unit) analyzes the -next program and converts it into a source program consisting of instructions specific to the target machine. -The next program does not depend on the target machine, so even if the target machine changes, you only need to change the source program generator, and the software created up to that point is also stored in the form of the primary program.
Can be reused.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure is a hardware configuration diagram of the present invention. The input section 1 is a section for inputting program creation information.

The display processing section 3 sends display information to the display section 2 based on the program creation information in the input section 1 or the storage section 5.

The display unit 2 displays the program contents according to this information. The storage unit 5 is a part that stores program creation information, and stores a primary program, a source program, and a load module in addition to the program creation information. The primary program creation unit 6 creates a primary program from the program creation information. The source program creation unit 8 converts the primary program into a source program. Further, the 50-domodule creation unit 10 compiles and links the source program to create an executable load module.

The display section 2 and the input section 1 are the man-machine interface section, and the other sections are the processing device main body 12.

Next, the flow of program creation according to this embodiment will be explained with reference to the functional configuration diagram in FIG.

An inputter inputs program creation information through the input section 1, and the result is immediately displayed on the display section 2 by the display processing section 3. In a ladder sequence or plot diagram, the symbol is drawn on the display by moving the cursor displayed on the display to the location where input is to be made and selecting a graphic symbol there. The input from the input unit 1 is simultaneously saved as program creation information 4. The program creation information 4 is information that has a one-to-one correspondence with this screen, and is information such as what symbol is drawn at which position on the screen and what name the signal is called. The -next program creation unit 6 analyzes this program information 4 and generates the -next program. -The next program is a program written in a form that does not depend on the target machine, and is expressed in the form of logical expressions and arithmetic expressions. The source program creation unit 6
General logical formulas and arithmetic formulas, such as A=B −C+D, Z = a X x + b X y /
It is converted into an instruction word for the target machine using an arithmetic expression such as c.

Instruction words vary depending on the machine, and for example, even in a single AND instruction, there are various types such as those that can only use a register as an operand, those that can specify a memory address, and those that can use indirect addressing, and depend on the machine. The source program created here is converted into a load module by the load module creation section 1o.

The above is the flow of program creation. Since the load module creation section 1o is generally supplied by the processor developer of the target machine, only the source program generation section 8 needs to be developed when changing the target machine.

Next, a specific example is shown in FIG. Figure 3 (,) shows a ladder sequence as an example displayed on the display unit 2, and expresses that the signal C turns on when the signals A and B turn on at the same time. .

31M(b) is the output of the primary program creation unit 6, which is the output of FIG. 3(a) converted into the primary program 7, and is expressed by such a logical formula. Figure 3 (C)
.

(C') is the output of the source program creation section 8, which is expressed as shown in FIG. 3(C) in a certain target machine. FIG. 3(C) means that the contents of memory A are placed in register AL, the AL register and memory B are ANDed, the result is placed in AL, and AL is stored in memory 0. Further, for other target machines, the result will be as shown in FIG. 3 (C'), for example. Figure 3 (C') is the register RO
Put the contents of memory A into register R1, and put the contents of memory B into register R1.
This means to input the contents of RO and R1, input the AND result of RO and R1 to RO, and store RO in memory C.

FIG. 4 explains the case of a ladder sequence using the contents of the program creation information 4 (input of the primary program creation section 6) as an example. The same applies to block diagrams and logic charts.

FIG. 4(a) shows the logic on the screen of the display unit 2. The screen is divided vertically and horizontally to form a matrix. Hereinafter, one divided element will be referred to as a cell. Only one symbol can be entered and displayed in each cell. Corresponding to this display diagram, there is a symbol table B on the internal memory, which has the same matrix as the screen, and corresponds to the symbols of each cell on the display screen.
It has the code of the symbol (for example, "ol" for the start symbol). Furthermore, it has a signal table C corresponding to each signal, and the coordinate (3, 1) contains information that signal name A is included.

When the operator moves the cursor on the display screen (,) and selects a symbol, a code corresponding to the symbol is written in tables B and C, and drawing is performed on the screen (a) accordingly. The contents of tables B and C are stored in the storage unit 5 as program creation information 4. Next, the inside of the primary program creation section 6 will be explained using FIG. 5.

Inside the primary program creation section 6 is a symbol matrix table 60. Signal name table 61° analysis section 62. Operator table 63. The stack 64° consists of an output table 65. The primary program creation section first takes out the program creation information 4 from the storage section 5 and stores the symbol matrix 60 . Expand to signal name table 61.

This is the same shape as Fig. 4B and C. The analysis unit 62 scans the symbol matrix table 60, examines symbol codes, and extracts names from the signal name table 61 as necessary. Then, the operator table 63 and the stack 64
is used as a work area to perform calculations and write the results to the output table 65. The result is an arithmetic expression in reverse Borland format. When one module is completed, the contents of the output table 65 are output to the primary program 7.

The operator table is an area for storing operators such as AND (.) and OR (+) parentheses, and the stack is an area for storing branch points. FIG. 4(a) explains the actual processing using a simple logic as an example.

First, scan the first line and start symbol code "
Search for "01". After matching, scan in the vertical direction from that position. When you reach the fork in the road [Locus 41 (2,2)
] Store the coordinates on the stack and store the parenthesis symbol as the branch start point in the operator table. Just scan downwards and sit! ! ! If A is found at (2°3), store A in the output table. Next, when B is found at the coordinates (2, 4), B is stored in the output table and "
・" (AND operator) is inserted. Next, the constellation If (2,6
), move the operator table to the output table, store r+J (OR operator) in the operator table, and write the OR end address (2, 6) to the stack.
), and from (2.2), which was stacked earlier, to (2,
6). Here, we find C at locus II (3,5), so we put C in the output table. seat 4
When returning at 1 (2, 6), output the operator after "(" (in this case "+")), clear "(" and scan down. At the coordinates (2, 7), output code If there is, output [=DJ to the output table. As a result, rAB −C+=D
Obtain the arithmetic expression J. The flow of this process is shown in FIG.

In reality, branches may be made double or triple, so the processing increases further, but basically the primary program can be created by performing the above analysis.

〔Effect of the invention〕

According to the present invention, it is possible to create a primary program that does not depend on the target machine, and to cope with changes in the target machine by changing only the conversion section, so that the work of changing the program creation device can be kept to a minimum. Furthermore, since the man-machine section is fixed, it is possible to create programs in the same operating environment in the future. Furthermore, since the -next program does not depend on the target machine, past software assets can be used as is, and migration and porting to a new target machine can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is a functional configuration diagram of an embodiment of the invention, FIG. 3 is a diagram showing an example of the file expressed in FIG. FIG. 4 is an explanatory diagram of program creation information, FIG. 5 is an explanatory diagram of the inside of the primary program creation section, and FIG. 6 is an explanatory diagram of processing contents of the primary program creation section. 2...Display unit, 3...Display processing unit, 6...Primary program creation unit, 8...Source program creation unit, 1
0...Figure Figure (a) Screen display matrix Date Figure Figure

Claims (1)

[Claims] 1. A display section for displaying program creation information, an input section for inputting program creation information operations, a storage section for storing the program creation information, and means for making the stored program creation information re-displayable. To re-display program creation information in a program creation device that is equipped with a means to analyze the program structure and instructions from the program creation information and create a source program for the target machine, and a means to create a load module for the target machine from the source program. A program creation device comprising: means for creating a primary source program independent of the form of a source program of a target machine from the information; and means for converting the primary source program into a source program of a target machine.