JPS58134307A - Sequence controlling method - Google Patents

Abstract

PURPOSE:To form a sequence instruction which is coincident with an actual logical circuit diagram, by storing the sequence arithmetic result in a row number register and executing instructions which define the line number and the row number register as parameters from upper side to the lower side of each column. CONSTITUTION:A program is supplied through a keyboard 11 and drawn on a screen of a CRT display 12 as a logical circuit diagram. This program corresponds to a logical circuit diagram drawn via a programming device 10 and is stored at a sequence programming device 3. Each instruction is decoded by an instruction decoder 4 through the part 3. A microprogram which is stored at a microprogram memory part 5 is executed in response to each instruction. Thus the flow of data and the arithmetic contents are controlled among an arithmetic part 6, an input line number control memory part 1, a row number register 7, an intermediate line number memory part 8 and an output line number control memory part 2 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sequence control method in which a desired sequence command is read from a gistance program section and processed in a sequence by an arithmetic circuit, and particularly to a sequence control circuit diagram expressed in logical symbols in a programming device. Concerning a sequence control method that allows programs to be created and modified using images.

In the early days, sequence control was based on a hardwired configuration, but since then, sequence control has progressed toward being performed using theoretical calculations. Sequence control method tPL) C (Programmable Logic Cont)
(rol), but in early PLCs, arithmetic processing was performed using pool algebraic instructions. In recent years, through the programming device ci't'r**,
Ladder diagram (relay sequence control diagram)? PLCs that allow you to create and modify sequence programs based on the image you draw have been around for a long time, but PLCs are based on the premise that relay control circuits are programmed by humans, so AND
.

It may be difficult to use for those who are used to the theoretical symbolic circuits of OR systems, so you can create and modify sequence programs by imagining drawing a logic circuit diagram with a programming device, and deepen the intended sequence control with the created nine programs. A sequence control method was desired. Recently, PLCs that can create and modify sequence programs with the image of drawing a theoretical circuit using a programming device are being devised. , - The entire surface is downward to the right, and there are restrictions such as the fork of the connecting wire, which makes it difficult to use.There are 6 drawbacks *.

The present invention has been made in order to eliminate the drawbacks of the prior art.
*Nine column number registers (RN: R2 No. Register) corresponding to each horizontal line of the logic circuit diagram created on the screen
The flow of control signals is defined from left to right in the logic circuit diagram created on the CRT screen of the programming device, and each RN and wire number is used as a parameter to create lineman manual commands, logic commands, and branching. A command, an incense stick output command is provided, and CR
Create and modify a sequence program by executing sequence operations from left to right in the column on T and from minute instructions to logical instructions (each from top to bottom) in the same power ram. The present invention aims to provide a sequence control method that eliminates the above limitations.

The present invention provides a sequence control method in which 711 sequence instructions are read from a sequence program memory section and sequence processing is performed in an arithmetic section, in which a logic circuit diagram is formed on a matrix consisting of vertical lines and horizontal lines,
Write the input wire number, intermediate wire number, output wire number, and logic symbol on the upper horizontal line, and write the connection line and branch line on the vertical line and horizontal line. A sequence program is created under the condition that the flow only flows to the right, and this sequence program is stored in the sequence program memory section, and the sequence program memory section, the calculation section, and the incense stick memory attached to the calculation section are stored. The gist of this invention is to perform sequence arithmetic processing using units and registers.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the sequence control method of the present invention. Here, (1) is an input wire number control memory section that selects and takes in process inputs and stores input data, and (2) is an output wire number control memory that stores output data and performs process output. Department,
(3) is a sequence program memory section that stores the sequence program; (4) is an instruction decoder that takes out sequence instructions from the sequence program memory section (3) and decodes the depth contents of the instructions; (5) is a microprogram memory The microprogram is driven by the instruction decoder (4) and controls the data flow and operation contents of the arithmetic section (6) according to the instruction contents.

(7) is a column number register R'N, and (8) is the middlemost memory section, which is connected to the input and output of the calculation section (6), respectively.

01 is a programming control device that stores sequence programs created from the keyboard (11) in the sequence program memory section (3) of the sequence control device (9), and stores sequence programs created using the keyboard Q in the CRTFe display (2). It displays a program, or displays a sequence program read out from the sequence program memory section (3).

Figure 2 is a list of instructions, #S logic circuit diagrams, and functions used in one embodiment of the present invention. Here, m-re "'
l1l-p* Wb m+p+ ・・'+ m
ar is an image of drawing a logic circuit diagram using logic symbols on the CRTR display (2), and corresponds to each horizontal line of the logic circuit diagram when the sequence program is created. 01 is the input data stored in the input wire number control memory section (1), 01 is the output data stored in the output wire number control memory section (2) K, and Mi is stored in the intermediate wire number memory section (8). has been,
Each kf)E is located in the intermediate wire number 7--2. RN is a column number register whose contents are ""m-r, . . .
・.

m-p+ % m+p+ =s fn+r
corresponds to each column.

Next, the operation of each instruction will be explained. A program is inputted from the keyboard a1, drawn as a logic circuit diagram on the - side of the CRTte display (2), and corresponds to the logic circuit diagram drawn via the programming device oI'Jk; sequence program memory section (3) is stored in Each instruction is stored in the sequence program memo 1J section (3 > n-ra instruction decoder (4
), the microprogram stored in the microprogram memo 13 section (5) is deepened in accordance with each instruction, and controls the arithmetic contents of the arithmetic section (6) and the input wire number 111J memo 17, respectively.

■ IN ((舅&)/帛): Stores the contents stored in MiK across It in RN-.

■ AND (*+ *+ps +e++ t sg+
r/m+q/ Mi) CRNhj* RN(m+p)
* = * Performs an AND operation on RN (mar), stores the result tRN (m + q)K, and if there is KMi, stores 4 results in Mi. 21. Performs the OR operation and stores the result IRN (sea bream + q). At the same time, if Mi exists, the result is also stored in Mi.

(2) NOT (m/Mi): Performs the NOT operation of RN h), stores the result in eRN-, and also stores it in Mi if Mi exists.

■ B D I (m/m +'p, ・=...e
tn+r) + BD2m/m+pm ・-=
*mar): Contents stored in RN(-k
RN (tN +p)+ ...=* RN (m
+r) Store K.

■ B U I (m/m-rt --m m-p
)t BO2 (m/m-r,..., m-
p): The contents stored in RN- are converted to RN (m
-r), -..., stored in RN(m-p).

■ BUD(m/m-1++…, m-pt m* m
+p+ -e@+r): RN h K The stored contents are RN(m-r) = -, RN(m-1)
)e RN(m-RN(m+p>t...,R
Store N(m+q)K.

■ OUT (m/ (Ml)): RN6y
! Store the contents stored in K in 0 or Mi.

FIG. 6 shows the input commands in the command column used in one embodiment of the present invention in depth from the first row to the first m row. Next, after executing the branch instruction in the second column in the order of the first row → O-Tairou, the logical instructions in the second column are executed in the order of the first row → O-Tairou. Below, execute the 3rd column → O(m-1) row, execute the branch instruction in the O column as the 1st row → Fang m row, and finally the output/instruction f+10 of the O column → O solution row and execute.

Figure 4 is a diagram showing an example of a logic circuit diagram corresponding to instructions of a sequence program of a sequence control method according to an embodiment of the present invention.
By drawing on the TR surface, it is also possible to automatically change to the corresponding sequence command.

In the above embodiment, a calculation configuration is shown in which a calculation unit (6) using a microprogram control method is provided for calculation processing. You can also use it as Although the column number register (7) is an example in which a general-purpose register of a computer is used, a flip-flop, a shift register, etc. may be used as long as it can store bit information. There is no #i limit on the maximum number of columns and rows, and a branch instruction for one column can be configured with several subcolumns. Further, in the above embodiment, the case of instructions of AND, OR, and NOT logic circuit diagrams was shown, but FLIP-ELOP.

Logic circuit diagrams such as N/M LOGIC*TIMER can also be constructed using the same idea.

As explained above, the present invention defines the flow of control signals from the left to the right of the logic circuit diagram, provides a column number register corresponding to each horizontal line of the logic circuit diagram, and stores the sequence operation results in the column number register. The execution order of each instruction using the incense stick and the column number register as parameters is executed from the top to the bottom of each column.Therefore, in the logic circuit diagram, there are constraints on voice descending and connection line intersections. The sequence commands are arranged in a round shape that matches the actual logic circuit diagram.* It is easy to exchange instructions from a programming device, and the sequence program corresponding to the logic circuit diagram can be brought to the machine. This has the effect of making it possible to provide a sequence control method with high program efficiency.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an embodiment of the sequence control method of the present invention, Figure 2 is an explanatory diagram showing instructions, logic circuit diagrams, and functions used in the present invention, and Figure 3 is an example of an implementation of the present invention. FIG. 4 is an explanatory diagram showing the operation execution order of instructions used in the example. FIG. 4 is an explanatory diagram showing an example of a logic circuit corresponding to instructions of a sequence program of a sequence control method according to an embodiment of the present invention. (1)... Input incense stick control memory section, (2)...
... Output wire number control memory section, (3) ... Sequence program memory section, (6) ... Arithmetic section, (7) ... Column number register, (8)...
...Intermediate wire number memory section, (9) ...Sequence control device, (G) ...Programming device substitute: Shin Kuzuno - Part I Figure 12rE3 'JJ31!1 Bud 4 Drawing procedure amendment (voluntary) Patent 11 Director-General 1, +44 indications f, i [[1986-17
011 No. 2 Name of the invention Ji-tance control method 3 When supplemented, representative piece 111 Jin 8 part IL supplement and object 1''''0^ Detailed description of the invention column. Details of contents-F<F"> j-General "414 1 1 1 ・16 -H 0f1 10. 10-

Claims (3)

[Claims] (1) In a sequence control method in which a desired sequence instruction is retrieved from a sequence frame memory section and sequence processing is performed in an arithmetic section, a logic circuit diagram is formed on a matrix consisting of vertical lines and horizontal lines. Write the distance wire number, intermediate wire number, exit wire number, and logic symbol on the above horizontal line, and write the connection edge and branch line on the above vertical line and horizontal line, and write on this logic circuit diagram. A sultance program is created under the condition defined that the control signal only flows from left to right, and this sequence program t J= is stored in the sequence program memory section, and the sequence program memory section and calculation section are stored in the sequence program memory section. and a sequence control method characterized in that the sequence calculation unit jl is operated by an incense stick memory unit and a register attached to the calculation unit. (2) A column number register corresponding to each machine 111 in the logic circuit diagram is provided attached to the calculation section, and the information taken out from the incense stick memory section and the column number register is stored in the calculation section according to the sequence program. One feature of the method is that sequence calculation processing is performed and the calculation results are stored in the incense stick memory unit and the column number register. (3) The instructions of the sequence program are assumed to consist of input instructions, logical instructions 1 branch instructions, and output instructions, with wire number and column number registers as parameters. Sequence arithmetic processing is executed horizontally from left to right and vertically from top to bottom in correspondence with the logic circuit diagram, and the 1+ instruction group is executed in the order of input instruction → branch instruction → logical instruction → output instruction. The input instruction causes information from the incense stick memory section to be stored in the corresponding column number register, and the branch instruction causes information from the column number register to be stored in the corresponding column number register,
The logical instruction stores the result in the column number register and incense memory of #jima, and the output instruction stores the information from the column number register t.
2. The sequence control method according to claim 1, wherein the sequence control method is stored in the incense stick memory section of -am.