JPS61143809A - Programmable controller - Google Patents

Abstract

PURPOSE:To enhance an operation performing speed by storing previously correspondingly a basic pattern increasing an opening and a converting pattern decreasing the opening and comparing the existence of the basic pattern in a ladder figure and converting into the converting pattern. CONSTITUTION:A programmable controller converts a ladder figure described in a ladder figure memory means (b) by a graphic programming loader into a mechanical word of a performing type corresponding to a component in a ratio of 1:1 by a mechanical word converting means (e) and a mechanical converting memory means (f). In this conversion, a pattern converting memory means d in which more than a pair of a basic pattern in a line and a column directions of an object to be converted and a converting pattern in a line and a column directions moving symbols therein upwards and leftwards are previously stored is compared with the basic pattern in the line and the column directions stored therein and the component in the ladder figure successively to dispose a converting means c for converting a pattern. Thereby, after the basic pattern is converted into the converting pattern, the mechanical word of the performing type is obtained, so that the number of the performing steps is decreased.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides an instruction system in which the constituent elements of a ladder diagram, such as A contacts, B contacts, blanks, and coils, and machine language for execution formation correspond to 1=1. In particular, the present invention relates to a programmable controller that converts a ladder diagram to reduce the number of execution steps of a sequence control program without changing the control contents of the ladder diagram.

Here, the ladder diagram is also called an expanded connection diagram (JI
S standard C0401), it is a diagram that develops electrical connections centering on functions and expresses them with graphic symbols, regardless of the operation of facilities, equipment, and equipment and the physical dimensions, shapes, and arrangement of each component, and is generally It is used for sequence control.

[Summary of the invention]

This invention provides basic patterns that require conversion in a programmable controller that has an instruction system in which components of a ladder diagram such as A contacts, B contacts, output coils, branches, etc. and executable machine language correspond on a l:1 basis. A ladder diagram that reduces the execution steps of a sequence control program without changing the control contents of the ladder diagram by preparing the basic pattern on the ladder diagram and the corresponding conversion pattern in advance and converting the basic pattern on the ladder diagram into a conversion pattern. It provides a conversion means (ladder diagram optimization means).

[Conventional technology]

A programmable controller (hereinafter referred to as a PC
2), the components of the ladder diagram generally consist of a symbol 1, connection information 2, and address 3, as shown in FIG. As shown in FIG. 3, symbol 1 has A contacts 21. B contact 22. Open 23. There is a short circuit 24 and a coil 25, and the connection information 2 indicates that there is a connection 31. There is no connection 32 and end of line 33. Further, the above-mentioned address 3 indicates the input/output area and the auxiliary area.

As shown in FIG. 5, the components 1 to 3 of these ladder diagrams correspond to the 1-word executable machine language 40 and 1=1. For example, the ladder diagram in FIG. When converting to ■), first use the mnemonic expression (ladder expression) of symbol 1, connection information 2, and address 3 to sequentially convert the constituent elements in the same order as shown from ■ to O from the upper left of the diagram. In addition, at that time, ■)■, [phase], [phase]
, [Phase], and [Phase] numbers are written at the end of each column, use the mnemonic expression (E in mnemonic expression) of the row end 33 for each column in the connection information 2, Also, ■) For those with the end of 1 circuit marked with the number 0, coil 2
Using the new monic expressions 5 and 33 at the end of the line, it is expressed in the two-monic form shown in the step order of Fig. 7, and the 5th
A code corresponding to each monic format is assigned from the code conversion table having the contents shown in the figure, and the conversion of the executable format into machine language is completed.

[Problem that the invention seeks to solve]

However, in conventional PCs that convert ladder diagrams into executable machine language as described above, so-called CRT
CR by graphical programming loader like loader
T (Cathode ray tube) After converting a ladder diagram read from a display using a light pen or other graphic reading device and written in a designated storage device into executable machine language, it can be read again from that machine language. When displayed on a display screen by a graphical programming loader or recorded on recording paper (hard copy) by a printer,
The ladder diagram when written on the display screen, including the positions of the components, has the advantage of being 100% recoverable and has good documentation. Even in a ladder diagram, the number of steps to be executed varies greatly depending on the method of description, which requires additional memory to store the executable machine language, and furthermore, the execution speed of sequence operations may decrease.

Therefore, the present invention provides a programmable computer that converts the circuit of a ladder diagram at a rate of one circuit without changing the content of one control in the ladder diagram so that the number of execution steps of a sequence control program is reduced.

The purpose is to provide a controller.

[Means for solving problems]

FIG. 1 shows an example of the basic configuration of the present invention.

That is, the present invention provides a programmable controller that converts a ladder diagram written in a ladder diagram storage means into an executable machine language corresponding to the constituent elements of the ladder diagram on a l-to-l basis using a graphical programming loader. A predetermined basic pattern in the row direction to be converted, a predetermined conversion pattern in the row direction in which the symbols in the pattern are moved upward, and a predetermined basic pattern in the column direction to be converted and the symbols in the pattern. A pattern conversion storage means in which one or more pairs of predetermined column direction conversion patterns each moved to the left are stored in advance, and a row direction basic pattern and a column direction basic pattern stored in the pattern conversion storage means. , a pattern conversion means that sequentially compares the constituent elements in the ladder diagram and, when a basic pattern is detected in the ladder diagram, sequentially converts it to a corresponding conversion pattern in the row direction or conversion pattern in the column direction. It is characterized by what it did.

[For production]

In this way, in the present invention, a predetermined basic pattern on a ladder diagram is converted into a predetermined conversion pattern in the direction of optimizing a ladder diagram in which components are moved to positions that reduce the number of openings that cause an increase in the number of execution steps. Since the executable format is converted into machine language after being converted to , the number of execution steps is reduced, the memory capacity for storing the machine language is reduced, and the execution speed of sequence operations is improved.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

First, 81 to 83 shown on the left side of FIG. 10 are basic patterns in the row direction of objects to be converted, which are converted to conversion patterns 84 to 96 in the arrow direction (right side) of the figure, respectively, as described later. These basic patterns 91 to 93 are open at the top, that is, component symbols 21, 22, 24, and 25 for the left and right connection points (in this figure, the A contact 21 is shown as an example). ) is placed at the bottom.

These basic patterns 91 to 93 are connected to component symbols 21, 22°, 24.
In order to convert both patterns 81 to 83 and 94 to 9B into conversion patterns 94 to 9B in which only 25 is displaced to the upper open position, that is, at least the upper part is not open, pattern conversion storage means as shown in FIG. (hereinafter referred to as a pattern table) d is stored in advance. In this way, the conversion pattern 84 is changed so that the positions of the constituent symbols 21, 22, 24, and 25 are changed in a direction that ultimately reduces the number of openings 23, without changing the positions of the connection points of the basic patterns 91 to 83. Since the ladder diagram is changed by converting to .

Next, 101 and 102 shown on the left side of FIG. 11 are basic patterns in the column direction of the objects to be converted, which have the same purpose as described above.
As described later, conversion pattern 1 in the arrow direction (right side) of this figure
03 and 104, respectively. The former basic pattern 101 is a pattern consisting of U-shaped connection information with an open left side, and the corresponding conversion pattern 103 is a pattern in which the connection information is shifted to the left side and the left side is not open. The latter basic pattern 102 has constituent symbols 21 and 22.

25 (in this figure, the A contact 21 is shown as an example) is a pattern that is biased to the right, and the corresponding conversion pattern 1G4 is a pattern in which the symbol of this component is biased to the left.

These basic patterns 101, 102 and conversion pattern 1
03 and 104 are stored in advance in the above-mentioned pattern table d in correspondence with each other.

In addition, basic patterns 101 and 102 and conversion pattern 10
3 and 104, as shown in FIG. 11, the positions of the connection points at both ends remain the same, and only the positions of the component symbols 21, 22, 24, and 25 are changed in a direction that ultimately reduces the number of openings 23. Therefore, even if the ladder diagram is rewritten as described later, it does not affect other contacts on the ladder diagram, and the number of openings can be reduced without changing the control details of the ladder diagram.

FIG. 12 is a flowchart showing the control procedure of the embodiment of the present invention, and this control procedure is stored in advance in a program memory (not shown) related to the pattern conversion means C of FIG. Next, the present invention will be explained in detail with reference to the flowchart of FIG. 12. First, input from the image input means a of FIG. After the ladder diagram is written in the storage means, the pattern table d is used to check whether the basic patterns 81 to 83 in the row direction shown in FIG. 10 exist in the ladder diagram of this storage means.
Step SL) Basic button 81~
If 93 exists, this pattern is read from the pattern table d and the corresponding conversion patterns 94 to 9 are read out from the pattern table d.
8 and rewrites the ladder diagram in the ladder diagram storage means (step s2). After that, return to step S1 again and convert this conversion process to the basic pattern 91 in the ladder diagram.
-83 is repeated until there are no more patterns, and the optimization in the row direction is executed. If it is determined that the basic patterns 91 to 83 described above do not exist in the ladder diagram stored in the storage means, the process proceeds from step Sl to step S3. , the pattern table d determines whether the basic patterns 101 and 102 in the column direction shown in FIG. 11 exist in the ladder diagram of the ladder diagram storage means.
Compare sequentially using These basic patterns toi
, 102 exists, this pattern is converted into the corresponding conversion patterns 103 and 104 read from the pattern table d, and the ladder diagram in the ladder diagram storage means is rewritten (step S4), and then step is performed again. Returning to S3, this conversion process is repeated until there are no more basic patterns 101, 102 in the ladder diagram, and the optimization in the column direction is completed.

Thereafter, the ladder diagram in the storage means is executed by referring to the machine language stored in the machine word conversion storage means (machine word table) 5 by the machine language conversion means e as shown in FIG. The image data is converted into machine language in the format, stored in the machine language storage means g, and outputted to the image output means.

Next, an example of optimizing the ladder diagram shown in FIG. 6 using the control procedure shown in FIG. 12 is shown in chronological order in FIGS. 13 (A) to (Y). , the part where the optimization process of this invention is executed is surrounded by a dashed circle,
Its application pattern (91,92,93°101.102
0) is written in the blank space on the right side of the figure. If the ladder diagram in Figure 6 is directly converted into executable machine language, 28 execution steps are required as shown in Figure 7, but after the optimization of this invention, the number of openings is reduced, so As shown in Figure 14, the execution steps are 18.
This results in a significant reduction of 11 steps.

〔Effect of the invention〕

As explained above, according to the present invention, a predetermined basic pattern that increases the number of openings and a conversion pattern that decreases the number of openings are stored in correspondence in advance, and a comparison is made to see whether or not the basic pattern exists in the ladder diagram. If a file exists, it is converted to the corresponding conversion pattern, so there are fewer free spaces and the number of steps for executable machine language is significantly reduced, which in turn reduces the memory capacity for storing machine language and reduces sequence calculations. This has the effect of improving the execution speed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the basic configuration of this invention. FIG. 2 is a diagram showing the constituent elements of a ladder diagram of this invention. FIG. 3 is a diagram showing the types of symbol l in FIG. 2. The figure shows the types of connection information 2 in Fig. 2, and Fig. 5 shows the correspondence between the constituent elements of the ladder diagram and the executable machine language. FIG. 6 is a diagram showing an example of a ladder diagram. FIG. 7 is a diagram showing an example of an executable machine language that corresponds one-to-one to the ladder diagram expressed in a binary format. FIGS. 8 and 9 are diagrams showing that the number of steps required when the same control sequence is converted into executable machine language differs significantly due to differences in the description format of the ladder diagram. FIG. 10 is a diagram showing the basic pattern (applied pattern) and conversion pattern (change pattern) during row direction optimization according to the present invention, and FIG. 11 is a diagram showing the basic pattern and conversion pattern during column direction optimization according to the present invention. FIG. 12 is a flowchart showing an example of the control operation of the present invention, and FIGS. 13 (A) to (Y) show the results when the ladder diagram of FIG. 6 is optimized using the control procedure of FIG. 12. FIG. 14 is a diagram showing an example of chronologically, and FIG. 14 is a diagram expressing the machine language of the execution form of the ladder diagram after optimization in binary form. a... Image input means, b... Ladder diagram storage means, C... Pattern conversion means, d... Storage means for pattern conversion (pattern table)
, e... Machine language conversion means, f... Machine language conversion storage means (machine word table), g... Machine language storage means, h... Image output means, l... Symbol, 2 ...Connection information, 3...Address, 21...A contact, 22...B contact, 23...Open, 24...Short circuit, 25...Coil, 31...Connection Cloth, 32...No connection, 33...Line end, 40...Machine language, 91-93...Row direction basic pattern, 84-88...
- Row direction conversion pattern, 101.102... Column direction basic pattern, 103.104... Column direction conversion pattern. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 7 Figure 9 (Number of running steps 7) Figure 12 Figure 13 (A) Figure 13 Figure 13 Figure 13 Figure 13 Figure 13 ÷ (L, I) ↓ (V) Figure 13 number (X) (Y). 14th do

Claims (1)

[Claims] The ladder diagram described in the ladder diagram storage means by the illustrated programming loader is one-to-one with the constituent elements of the ladder diagram.
In a programmable controller that converts a machine language in an executable format corresponding to A pattern conversion storage means in which one or more pairs of each of a predetermined column-direction basic pattern and a predetermined column-direction conversion pattern in which symbols in the pattern are moved to the left are stored in advance, and the pattern conversion storage means The stored basic pattern in the row direction and the basic pattern in the column direction are sequentially compared with the constituent elements in the ladder diagram, and when the basic pattern is detected in the ladder diagram, the corresponding basic pattern in the row direction is compared. A programmable controller comprising: a pattern conversion means for sequentially converting the conversion pattern or the conversion pattern in the column direction.