JPS62157907A - Forming method for ladder graphic - Google Patents

Abstract

PURPOSE:To easily correct processing such as the debugging of a sequence program by describing which part on a graphic the operand of each instruction is used at. CONSTITUTION:A write instruction (coil 15) having an operand accompanying a non-write instruction (relay contact point 16) as its operand is found and the page and line on the graphic where the symbol of the coil 15 corresponding to the write instruction is described are found, thereby describing the page and line nearby 14 where the symbol of the relay contact point 16 corresponding to the non-write instruction is described. Further, a non-write instruction having an operand accompanying the write instruction as its operand is found and the page and line on the graphic where the symbol of the relay contact point 16 corresponding to the non-write instruction are found, thereby describing the page and line nearby 13 where the coil corresponding to the write instruction is described. Consequently, the correction processing of the sequence program is easily performed.

Description

[Detailed Description of the Invention] <Industrial Application> The present invention relates to a method for creating a ladder diagram, and in particular, where are the relay contacts that are turned on and off by the coils used on the ladder diagram (first page, second page)? This invention relates to a method for creating a ladder diagram that makes it possible to easily recognize in what rows the coils are used and where the coils that turn on/off relay contacts are located on the ladder diagram.

<Prior Art> In a numerical control system, each mechanical element of a machine tool is controlled based on commands from an NC device.

The transmission and reception of signals between the NC device and the machine tool is controlled based on a sequence program.

This sequence program is a logical program of the functions of the high-power circuit that controls data exchange between the NC device and the machine tool using instruction codes and operands.For example, the ladder diagram that is part of the high-power circuit shown in Figure 9 is As shown in FIG. 10, it is programmed with monic codes. In addition, in the ladder diagram) is the coil, 11 is the make relay contact,
1/1 indicates a break relay contact. Also, RD, OR, A, ND, WR in the sequence program
T, AND -NOT, OR-NOT... are each instruction codes, RD is a read instruction (read instruction), AND is an AND operation instruction, WRT is a write instruction (write instruction), OR is an OR operation instruction, AND -NOT is a logical product operation instruction with a negative value, OR-
NOT is an OR operation instruction with a negative value.

Also, the symbols MF, M28., written in alphanumeric characters above the relay contacts and coils. ...AUT, MO3゜... are operands of each instruction code, and their logical values (11111
or "0") is the specified location of the work memory of the NC device,
It is stored in a predetermined bit.

Note that below the relay contacts and coils, storage addresses (numbers above the decimal point) and bits (numbers below the decimal point) in the work memory are shown. Further, a correspondence table (see FIG. 11) between symbols and storage locations (addresses) is stored in the work memory.

According to the command group of the PRA part of the sequence program of Party B, MF, M2S, M24, M22, M21, Ml, 8
・Ml4 ・Ml2 ・Ml, 1 logical operation is executed, and the result of the operation ('1' or "Ol') is specified at the specified location in the work memory corresponding to the A operand MO3 that is output in response to the write command WRT. Pi 1. (2nd bit of address 10), and the operation of AUT-MO3/5PCCW is executed by the instruction group of the PRB part, and the operation result is stored at the specified address in the work memory specified by the operand spcw accompanying the write instruction WRT. A predetermined bit (stored in address 20, fifth pin l-1).

Note that the name of the read command to lie command is called a net, and the ladder diagram corresponding to the net is called a unit.

<Problem to be solved by the invention> Now, once a sequence program is created, a ladder diagram spanning multiple pages is printed out using the sequence program, and depacking is performed using the ladder diagram to check for errors. If necessary, make corrections and finally create a complete sequence program.

By the way, the same symbol is used not only in one place but in various places. However, in the conventional ladder diagram creation method, only the relay contact and coil symbols, symbols, and storage positions (addresses) are written on the ladder diagram, as shown in FIG. For this reason, if you want to correct the sequence during depacking, for example, if you want to delete a certain symbol or correct it with another symbol, you cannot easily search for the symbol using the conventional ladder diagram, making depacking difficult. Yes, it takes a considerable amount of time. In particular, in the case of a ladder diagram that spans dozens of pages, the above-mentioned drawback becomes even more noticeable because it is necessary to search for a predetermined symbol across all pages.

From the above, an object of the present invention is to provide a ladder diagram creation method that allows easy recognition of where on the ladder diagram (in which page and in which line) a symbol that is an operand of each instruction is used. .

Another object of the present invention is to provide a ladder diagram creation method that allows easy correction of sequence programs.

Means to solve problems〉 FIG. 1 is a ladder diagram according to the present invention.

11 is a unit display field that displays the ladder diagram (unit) corresponding to one net from the read command to the write command name, 12 is a comment field, and 13 is where the operand "5PSTOP'" of the write command is (which page). , in which line) is used. 14 is a write instruction (coil on the ladder) that corresponds to the operand (relay contact on the ladder diagram) of an instruction other than the write instruction (non-write instruction). ) is a cross-reference display section that indicates where (on what page and line) is it located.

15 is a coil, and 16 is a relay.

<Operation> Obtains a write command (coil in ladder diagram 2) whose operand is the operand (symbol J: and address in ladder diagram) accompanying a non-write command (relay contact on the ladder diagram), and executes the write command. The page and row on the ladder diagram where the coil symbol corresponding to the non-write command is written are determined, and the page and row are written in the vicinity (cross reference display section) 14 where the relay contact symbol corresponding to the non-write command is written.

Also, find a non-waiting command (relay contact on the ladder diagram) whose operand is the operand (symbol or address) accompanying the command (coil on the ladder diagram).
Find the page and row on the ladder diagram where the relay contact symbol corresponding to the non-write command is displayed, and find the vicinity (cross reference display section) 13 where the coil corresponding to the write command is displayed.
Indicate the page and line.

<Example> FIG. 1 is a partially enlarged view of a ladder diagram according to the present invention. Note that six lines from line A (12A) to line F (12Fl) on page 12 are displayed.

11 is a ladder diagram corresponding to one net from a read command to a write command (a unit display field that displays unit I-1, 12 is a comment field, and 13 is a write command (coil in ladder diagram-12). Cross reference/response display section that shows where the operand "5PSTOP" is used (on what page and line), 14 corresponds to the operands of non-write 1 to commands (relay contacts in ladder diagram 2) Where is the write command (ladder) - the coil) (what page,
This is a cross-reference display section that indicates what line (in which line) it is located.

In other words, the cross-reference display column 13 is a column that indicates where (on which page and in which line) the relay contact that is turned on and off by the coil is used, and the cross-reference display column 14 is a column that indicates where on the ladder diagram the relay contact that is turned on and off by the coil is used. Turn on the relay contact of /
This column indicates where the coil to be turned off is located.

In Figure 1, write command (coil on the ladder diagram)
The non-write instruction (in the ladder diagram, one relay contact 7) whose operand is "5PSTOP'" is used in lines B, D, G, 14, and 5 of page 12, so These pages and lines are displayed in the cross-reference display section 12 of the comment field 12.

Also, the operand (symbol name or address of the relay contact) accompanying a non-write command (relay contact on the ladder diagram)
There are 12 write instructions with “5PSTOP” as the operand.
Since it is used in the first line of the page, the page and line are written in the cross-reference column 14 of the operand.

FIG. 2 is a block diagram of the sequence program creation device. Reference numeral 11 denotes a main unit composed of a microcomputer, which includes a processor 11 a, a ROM 1 l b, a RAM 11 c 1 and a working memory 11 . d%.

12 is a printer, 13 is a display device,] 4 is a keyboard, 15 is a floppy disk device, 15a, 15
b is a floppy disk.

A loading program is stored in the ROM 11b of the main body 11. Prior to creating a sequence program, a system program for creating a sequence program is read from a predetermined floppy disk under the control of the loading program and stored in the RAM 11c.

As a result, the processor lla thereafter executes processing based on the control of the system program, displays processing results and various instructions on the display device 13, and performs predetermined processing based on data, commands, etc. input from the keyboard 14. , create a sequence program, and output it to a medium such as a floppy disk.

Further, the processor lla creates a ladder diagram using the created sequence gologram and prints it out from the printer 12. The method for creating such a ladder diagram will be explained below according to the flowchart in FIG.

(Al First, set 1→1.

(Next, create a ladder diagram (unit) of the first net of the write instruction name from the mi-th read instruction of the sequence gologram, find the number of rows YMo of the unit, and use the write address (rai) and the operand of the instruction. (the address written below the coil in the ladder diagram) is stored in the working memory 11d.

(c) After calculating, check whether the number of lines Y11Ax has been calculated for all nets.

(If the number of lines has not been determined for all dl nets, the first step is
Increment l by 1 and repeat the process from step (b) onwards.

By te1 or more, write address and number of lines Y for all nets
, Ax (see Figure 4), then for each operand (write address) of each write instruction, calculate the number of instructions other than write instructions (non-write instructions) that use the write address as an operand ( Number of cross references) Nr
seek. That is, the initial value of Nr of all write addresses is cleared to zero, and in this state, the sequence program is searched from the beginning, and every time a non-write instruction appears, Nr of the write address that is the same as the operand of the non-write instruction is set to 1.
By counting up, the cross reference number Nr of all write addresses is determined and stored in the working memory (see FIG. 4).

(Following it, it goes from 1 to 1.

(g) After marking, the stripe width and cross reference l/ of each unit
Compare the size of the loss reference width required to display the response. In addition, the stripe width is defined as the width of one line by Wd and Y, 1A.
x-Wd, and the cross-reference width is Nc-Wa, where the number of cross-reference lines is Nc and the width of one cross-reference line is We. Tat! Then, Nc is Nr if the number of cross-references displayed in one line is different from n.
/ is an integer obtained by rounding up n. In addition, J- shown in FIG.
sea urchin comment)・In column 12 “5PINDLE 5TOP
When adding a one-line comment such as "COMMAND'", consider increasing the number of cross-reference lines Nc by one line.

(The number of increased lines 1.a is calculated using the following formula (% formula %) in the hll width cross reference width and is stored in the working memory in correspondence with the line address.

(1) If stripe width ≧ cross-reference width in step (gl), or if the number of increased lines La is calculated in step fhl, for all nets (gl,
(Check what happens when the hl process is completed.

(If it has not finished, change 1 to 1 as i + 1 → l.
Step forward and repeat the process from step (g) onward.

ζk) If completed, write address and increased number of lines L
The correspondence table a has been created in the working memory as shown in FIG. 5, and the following processing is then executed as 1→J.

ill create a unit of the jth net, and the unit is 1
Check if it fits in the page margin. In addition, check whether there is an increased number of lines from the correspondence table between the write address and the increased number of lines (see Figure 5),
If so, it is checked whether the increased number of lines can be taken into account and the margins for one page can be accommodated.

(If it fits within the ml margin), the net unit image is stored in a page buffer memory (not shown, but a predetermined storage area of the working memory 1.1d is used) that stores one page's worth of ladder images.

Also, a correspondence table (sul) between the operands (referred to as relay addresses) of each non-write instruction in the J-th net and the addresses in the page buffer memory that stores the cross reference column (14 in FIG. 1) of the operands. (See Figure 6).

Furthermore, the operand (
A correspondence table (referred to as a write address table) between the address (referred to as the write address) and the address in the page buffer memory that stores the cross-reference column (13 in FIG. 1) of the operand is created (see FIG. 7).

inl, then check whether there is an increased number of lines in the j-th net.

(01 If there is an increased number of lines, provide a space corresponding to the increased number of lines.

(p) After the net, or if there is no increase in the number of lines in step (n), it is checked whether the processing from step (1) onwards has been completed for all nets.

(If ql is not completed, proceed one step by j+1→j and repeat the process from step (1).

If the processing has been completed for all jrl nets 1-, or if there is no more space to accommodate the unit to the Jth net 1 in step (1), 1→r is set.

(s) Next, set 1→p.

(t) After writing, create the first page write address table (see FIG. 7).

f, l Check whether the same write address as the first relay address in the relay address table created in step (m) exists in the write address table on the first page.

(If vl does not exist, p is incremented by one step by p+1-p and the process from step 11 onward is repeated.

(If wl exists, specify the page (first page) and row in the ladder diagram where the coil corresponding to the write address is drawn.
A predetermined address (determined from the relay address table obtained in the ml step) of the page buffer corresponding to the relay address cross-reference column is written.

After (X), it is checked whether the processing after step (S1) has been completed for all the relay addresses obtained in step (m).

(If yl is not completed, step r + 1 → r (repeat the process from Sl onwards).

(Z) Step 1 for all relay addresses (if processing after Sl has been completed, change from 1 to W).

(a) For ', let 1→p.

(b) 'Pth page relay address table (6th page
(see figure).

(C)' Check whether the same relay address as the W-th write address in the write address table created in step (m) exists in the relay address table on the first page.

(v) If it exists, the page (first page) and row in the ladder diagram where the relay contact corresponding to the relay address is drawn,
Write to a predetermined address (determined from the write address table obtained in the ml step) of the page buffer corresponding to the cross-reference field of the W-th write address.

However, if it does not exist, proceed to the next step.

(d)'For all pages, step (b)', (C)
Check whether processing of ' has finished.

(e) If the process is not completed, p is incremented by one step by p+1→p and the process from step (a)' is repeated.

(f) 'Steps (bl', (cl) for all pages
When the process ' is completed, the printer 12 prints out one page of the ladder diagram stored in the page buffer memory, and then the page buffer memory is cleared.

(g)'Then, check whether printing of all pages of the ladder diagram has been completed. If the process has not been completed, the process from step (1) onward is repeated to print the next page of the ladder diagram, and if it has been completed, the ladder diagram creation process is completed.

FIG. 8 is a one-page example of a ladder diagram created according to the present invention. In addition, the 12th page is shown in Figure 8, and the number of lines on one page is 16 lines from A to P. In the cross reference column of comment column 12, 5 cross references are written per line. It is assumed that

Although the present invention has been described in detail above, the present invention is not limited to the embodiments and can be modified in various ways within the scope of the claims.

<Effects of the Invention> According to the present invention, the symbol (coil, relay contact) that is the operand of each instruction is indicated where on the ladder diagram (on which page, in which line) is used. With this configuration, correction processing such as depacking of sequence golograms can be easily performed.

[Brief explanation of drawings]

Figure 1 is an enlarged diagram of a ladder diagram according to the present invention, Figure 2 is a block diagram of a sequence program creation device that implements the present invention, Figure 3 is a flowchart of the process of the present invention, and Figure 4 is a write address and number of lines. Y11 A A correspondence table between X and the number of cross references Nr, Figure 5 is a correspondence table between the write address and the number of increased lines L a, Figure 6 is a relay address table, Figure 7 is a write address table, Figure 8 is a correspondence table between The one-page ladder diagram according to the present invention, FIGS. 9 to 11 are explanatory diagrams of a sequence program, FIG. 9 is a conventional ladder diagram, and FIG. 10 is a partial explanatory diagram of a sequence program. FIG. 11 is a correspondence table between symbols and addresses. 11...Unit display column, 12...Comment column, 13...Write instruction cross reference display section, 14
...Cross-reference display section for non-write commands, 15.. Coil, 16.. Relay contact Patent applicant Chiki Saito, agent, patent attorney, Fanuc Co., Ltd. Figure 3 (C) Figure 4 Room 1 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] A sequence program created with instruction codes such as read instructions, logical sum operations instructions, logical product operations instructions, write instructions, etc. with operands corresponding to relay contact symbols, coil symbols, etc. on a ladder diagram. In the ladder diagram creation method of creating a ladder diagram consisting of multiple pages using Find the page and row on the ladder diagram to be written, write the page and row near where the relay contact symbol corresponding to the non-write instruction is written, and find the non-write instruction whose operand is the operand accompanying the write instruction. , a ladder diagram characterized in that the page and row on the ladder diagram in which the relay contact symbol corresponding to the non-write command is written are determined, and the page and row are written in the vicinity where the coil corresponding to the write command is written. How to make.