JPS60164838A - Flowchart graphic language for programmable controller - Google Patents

Abstract

PURPOSE:To obtain a flowchart system graphic language for programmable controller by including conditional processing commands of a timer, counter, and a shift register, bit processing instruction, output instruction, and jump destination designating instruction. CONSTITUTION:For convenience' sake, instructions are classified to fundamental instructions, bit processing application instructions, group subroutine instructions, data processing instructions, auxiliary instructions, and the other instructions. The symbol of each instruction is called a graphic element and has a pattern and leading-out lines, and a mnemonic and operands are entered in the pattern. A label number is entered on the outside of the pattern. A flowchart is inputted to a programmable controller from a proper input device such as a keyboard having keys corresponding to individual instruction symbols, a pattern reader, or the like. A display device having a display screen approximating a flowchart entry form is used, and the flowchart is inputted while generating it.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a flowchart-based graphic language for programmable controllers.

[Prior art]

Conventionally, when creating a computer program, the common method is to first draw a flowchart of the flow of data processing to be executed by a computer, and then code the completed flowchart using a predetermined programming language. A flowchart is a computer that functions as a sequential machine that can perform many different types of tasks (tasks).
It has become an indispensable programming tool for creating application programs that perform time-sharing operations. This is especially true when multiple programmers create an application program for a complex system.

The method of creating flowcharts is standardized and standardized. However, since it is intended to contribute to Coanda and its versatility is the first priority, it is limited to very specific things, and the details are left to the creator's discretion. , multiproduct processing is expressed by figures of different shapes, but here is a detailed description of the processing.

Optional. For example, calculation processing is represented by a rectangular figure,
Whether or not to enter the details of the calculation depends on the case.

When a flowchart creator performs a counder, the calculation details may or may not be entered in the flowchart. Furthermore, when creating a simple program, it may not be necessary to create a flowchart.

However, if the person creating the flowchart and the programmer performing the coundering are different, the detailed calculation formulas described above must be written in the flowchart.

In this way, there is considerable freedom in creating flowcharts. This is because, although flowcharts have an important role as mentioned above, they are merely an auxiliary means to make the counder work, which requires a great deal of effort and time on programmers, even a little easier.

Many high-level (close to human languages) programming languages have been developed to facilitate program creation, and some of them have become standardized and widely used.

A graphic language is a type of high-level language.

This uses graphics as a programming language. It is desirable to have a graphic language that is as versatile as possible, that gives meanings and rules to unit figures such as rectangles and circles, and the connection lines that connect them, that is easy for humans to create, easy to convert into machine language, and is as versatile as possible.

Recently, programmable controllers have come to be used in various control fields. This is a general-purpose control device that integrates a microcomputer and an input/output unit. That is, it can be applied to various control systems by arbitrarily changing the application program provided thereto.

The programmable controller takes in the state of each part to be controlled as bit-by-bit information from an input unit, performs predetermined processing, and then outputs the bit-by-bit control information from an output unit to operate an actuator or the like. In most cases, application programs for such processing must be created using a machine language level language (or assembler, etc.) for the programmable controller. This requires a professional programmer and takes a lot of time and money to create.

Due to the above-mentioned circumstances, there has been a demand for a graphic language that does not require Coanda and allows direct input of flowcharts.

〔the purpose〕

The present invention was made based on the above-mentioned need, and an object of the present invention is to provide a flowchart-type graphic language for programmable controllers.

[Configuration] The flowchart-type graphic language for a programmer controller according to the present invention includes condition processing commands for timers, counters, and shift registers, bit processing commands that enable logical operations and differential processing in bit units, and output b relay on/off commands. It is possible to include output commands to specify jump destinations, and commands to specify jump destinations.

"〔Example〕 Hereinafter, the present invention will be explained in detail with reference to the drawings.

□ FIG. 1 is an instruction list of a flowchart-type graphic language for a programmable controller according to the present invention.

For convenience, instructions are classified into basic instructions, bit processing application instructions, group subroutine instructions, data processing instructions, auxiliary instructions, and other instructions. The symbol of each command is called a graphic element and has its own figure and leader line. Write the mnemonic and operand inside the figure. However, the label number should be written outside the figure.

The function of each instruction will be explained with reference to FIG.

(1) Basic commands A, CJ (waiting for conditions) It lasts until the judgment condition is met.

Up to two operands, >, and - can be specified, and R indicates the result of a logical operation.

A, CJ (conditional branch) If the judgment condition is not met, jump to the specified bell destination.

The operands are the same as in section A above.

TIM (timer) Set a timer and keep it running until the time is up.

The unit of the timer setting value is 0.1 second.

T'IM (timer branch) Starts the timer after setting it, and jumps to the specified label destination if the timer has not expired. If it is already running, only time-up is determined and processed.

61 (Timer setting unit is 0.1 seconds) O, CNT (counter holding) Set the counter and hold it until it counts up.

(If you want to reuse the same counter after using it, R8
Clear the counter with the T command) force, CNT (
Counter branch) Set the counter and jump to the specified label destination if the count is not up.

(Refer to item O above) K, OUT (Output) Turn the output relay 0N10FF. Continuous specification is possible by inserting ~ command between Relay 1 number and Relay 1 number.

, JUMP (specify jump destination) Jump to the specified label destination unconditionally.

KE, FROM (specify jump destination) Specifies the terminal display to jump to.

The specified jump destination is unconditionally displayed graphically starting from the zero column.

At that time, the jump destination graphic address is automatically entered.

SR (Shift Register) Shifts the data from shift first relay number 1 to shift end relay number 1 to the end one pit at a time, and inputs the data of the input relay to the first relay.

(2) Pit processing application instruction A, AND (logical product operation) Used in conjunction with CJ (wait, branch) instruction, from 2 to 4 A
Perform ND operation.

N pit operations are possible by using AND instructions without operands.

B. OR (logical sum operation) Used in conjunction with the CJ (9-branch) instruction to perform an OR operation on 2 to 4 items. 2. n operations are possible by using OR instructions without operands.

DIF (differential processing specification) Used in conjunction with the CJ (hold, branch) instruction to specify differential processing of input bit data.

Note that an AND or OR instruction without an operand performs an AND or OR between the logical operations of the preceding and following instructions.

(3) Group, subroutine instructions A, GN (group definition) Indicates the beginning of a group program.

I, GS (Group activation) Start other group programs.

Ignored if already started.

If it is temporarily stopped by the OR command, restart it.

GH (Group stop) Stops and initializes other group programs.

While calling a subroutine (CALL), that subroutine is also initialized.

Engineering, GE (group ended) Indicates the end of the group program.

E, GP (Group method stop) Temporarily stops other group programs that are being executed at that position.

Re-orbit is by GS.

Force, 88N (subroutine definition) 9- Indicates the beginning of a subroutine.

Ki, RET (return) Indicates the end of a subroutine.

0ALL (Call) Calls the subroutine and advances to the subroutine post-execution step.

(If the called subroutine is currently being executed, it will be called after waiting for its termination).

Calls between subroutines (nesting) are possible up to 3 levels.

(4) Data processing instruction The ``S'' or S appended to the end of the instruction symbol and binary in this instruction indicates the data to be handled at one time,
is 16 bits, and S is 8 bits.

7. MOVL or MOVs (7'-Evening Transfer>Transfer the data of A to C as is.

A, ADDL or ADDS (Addition) A+B-IC One, 5UBL or 5UBS (Subtraction) 10- A-8-40 Engineering, MULL or MULS (Multiplication) MULL: AXB → (C+2), CMULS: A
xB-+ (C+1), C o, DIVL or DIVS
(Division) DIVL: A-4-B→C, remainder -+(C+2)D
IVS: A+B-C, remainder → (C+1) force, CMP
14G; 1MP8 (Comparison) Compare the data of A and 8.

The process of determining the result is performed by the next <CJ command.

The results are stored in a special relay.

(A)≦(8) (The numerical range of A and B is O to 9999) *, B I NL or G; tE3 INS (=+-code conversion BCD/BIN) Converts BCD data to binary data.

A (BCD) → C (BIN> ri, BCDL or BCDS (Code conversion 81N/BC
D) Convert binary data to BCD.

A (BIN) → C (BCD) (Numeric range of A: 0 to 9999) (5) Auxiliary command A, NOT (not specification) Used in conjunction with each instruction such as CJ, OUT, AND, OR, data processing, etc. to specify Specifies logical inversion of data.

I, ~ (continuous specification) Used in conjunction with the OUT command to specify continuous relay processing.

When the relays specified before this command are not specified as NOT, all are turned on, and when they are specified as NOT, all are turned off.

6* (Label No. specified) Specify the label number.

M, M (data memory specification) Used in conjunction with TIM, CNT, and data processing instructions to specify data memory.

E, U (Unit data specification) Used in conjunction with the TfM, CNT, and data processing instructions to specify input/output crab unit data.

Numerical values are expressed in HEX.

power, R8T (timer, counter reset specification) TIM
, CNT to specify the reset of a timer or counter.

Ki, R (logical operation result specification) Shows the result of a logical operation.

(6) Other commands A, N0P: Gives one element space when displaying graphics,
Adjust the graphic layout.

FIG. 2 shows an example of a flowchart written using the graphic language of FIG.

To create a flowchart, use a standard sheet of paper with horizontal lines divided into three equal parts and vertical lines divided into several equal parts. However, the number of equal divisions in the horizontal direction is not limited to three equal divisions.

The advantages of using such standard paper are as follows.

(1) 1 in one square of the lattice formed by the crevice
It is easy to create flowcharts because all you have to do is fill in the symbols.

(2) Using the display as an aid when inputting 13- In this case, it is easy to design and convenient to use.

(3) Enter the necessary explanation in the notes column to assist in reading the flowchart.

The flowchart is input to the programmable controller from a suitable input device such as a keyboard or a graphic reader having keys corresponding to each command symbol.

By using a display having a similar display screen to the flowchart entry form, it is possible to input data while creating the 70-chart.

(effect) Basic instructions include TIM, CNT, SR, and FROM.

By including the OUT command, programs for programmable controllers used for various sequence controls can be created.

Furthermore, a group of conditional instructions of unlimited length can be created using pit processing application instructions such as AND, OR, and DIF.

The instructions for writing symbols are simple, so it is especially easy for experienced 14- No need for programmers.

[Brief explanation of drawings]

FIG. 1 is a list of instructions for a flowchart type graphic language according to the present invention, and FIG. 2 is a flowchart of one embodiment. TIM...Timer condition processing instruction, CNT...
・・・Counter condition processing instruction, SR・・・・・・・・・
Shift register processing instruction, OUT...Output instruction, FROM...Jump destination designation instruction, Applicant NEC Seiki Co., Ltd. Agent Patent attorney Add 1) Takeo Figure 1 (B) ( C) Figure 4 (D) (E) Kazuo Wakasugi, Commissioner of the Patent Office1. Display of the case 1982 Patent Application No. 20392 2, Name of the invention Flowchart type graphic language for programmable controllers 3, Person making the amendment Relationship to the case Patent applicant address 19-18 Tsutsumi-dori-chome, Sumida-ku, Tokyo name
(424) Nihon Denki Seiki Co., Ltd. 4, Agent 104 Address 3rd floor, Ginza Ooi Building, 2-10-5 Ginza, Chuo-ku, Tokyo Phone: 03 (545) 2818 Name (7882) Patent attorney: 1 ) Takeo 5, "Detailed description of the invention" and "Brief description of the drawings" column-1-se of the counter-image of the amendment Il) 6. Contents of the amendment (1) From the bottom of page 5 of the specification In the fifth line, "list" is corrected to "chart for listing." (2) On page 7 of the detailed letter, line 7, ``Count up'' is corrected to ``Calan 1 ~ up''. (3) ``Jump'' in the 6th line from the bottom of page 7 of the specification is corrected to ``1 jump''. (4) Line 9 of page 9 of the specification, line 16 of the same page, and line 18 of the same page
Correct each "next" in the line to "time". (5) On page 15 of the detailed letter, line 4, ``List'' is corrected to ``Charts for list.'' 2-

Claims (1)

[Claims] 1. Conditions for timers and counters III! A flowchart type graphic language for a programmable controller characterized by including commands, pit processing commands, output commands, and jump destination designation commands.