JPH02228704A - Compiler type sequence controller - Google Patents

Abstract

PURPOSE:To make a separate sequence controller unnecessary by describing a ladder processing sequence with the use of a Boolean algebra, translating a sequence program by means of the Boolean algebra to a machine language program with the use of a complier, and sequence-controlling a device to be controlled according to the machine language program. CONSTITUTION:A processor 12, which sequence-controls a device 30 to be controlled according to the program, input means 14 and 16, which input the sequence program obtained by describing the ladder processing sequence with the use of the Boolean algebra, and a compiler ROM 18, which translates the sequence program inputted by the input means 14 and 16 to the machine language program, are provided. Based on the machine language program translated by the compiler 18, the sequence of the device 30 to be controlled is controlled. Thus the processor such as a personal computer and a microcomputer is used, the separate exclusive sequence controller is not used, and the ladder sequence can be processed without increasing hardware.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sequence controller using a processor such as a microcomputer. The present invention relates to a compiler type sequence controller that is translated into a machine language program and performs sequence control of a controlled device.

[Background of the Invention] Conventionally, sequence controllers have been used in automatic production equipment in manufacturing factories, etc., and these sequence controllers operate various equipment and machines according to predetermined orders and procedures, and perform manufacturing and assembly. etc., are being automated and unmanned.

Ladder processing sequences are frequently used in such sequence controllers, and the sequence program in this case is generally written in a so-called ladder language, which creates a ladder diagram using relay symbols. And the sequence program created by this ladder language is targeted at him! It is set in a sequence controller dedicated to the II control device, and is processed using an interpreter.

In this case, the interpreter type sequence controller has a drawback that the processing speed is slow because the sequence program created in the ladder language is translated into the machine language of the controller (processor, etc.). However, on the other hand, it has the advantage that even if parameters or programs are changed, if a modified sequence program is input, it can be immediately translated and executed by an interpreter.

On the other hand, some NC machine tools using numerical control devices, control devices using microcomputers, and personal computers use a compiler system that inputs programs written in high-level languages such as BASIC to the NC language. be.

In this compiler-based control device, the input program is translated into machine language for the control device (processor, etc.) by the compiler, and then this machine language program is executed sequentially, so the processing speed is faster than that of an interpreter-based control device. It has the advantage of being much faster. However, if a parameter in the program or a change in the program is changed, the modified program must be compiled each time.

When considering a relatively small-scale control device using a microcomputer or personal computer, it is possible to process ladder sequences without increasing the scale of the hardware while also increasing the processing speed. A method that can be used is desired. However, in the conventional method, an I10 card (human output interface board) is inserted into the expansion card slot of a microcomputer, personal computer, etc.
is inserted and connected to the human output section of the sequence controller with a cable, which requires a separate dedicated sequence controller, which has been pointed out as being complicated and increasing costs.

[Object of the Invention] The present invention has been made to overcome the above-mentioned disadvantages, and it is possible to increase the amount of hardware by using a processor such as a personal computer or a microcomputer without using a separate dedicated sequence controller. The purpose of the present invention is to provide a compiler-type sequence controller that can process ladder sequences without the need for a computer.

[Means for Achieving the Object] In order to achieve the above object, the present invention provides a processor that sequentially controls a controlled device according to a program, and an input that inputs a sequence program in which a ladder processing sequence is described using Boolean algebra. and a compiler that translates a sequence program input by the input means into a machine language program, and is configured to perform sequence control of the controlled device based on the machine language program translated by the compiler. Features.

The above compiler-type sequence controller according to the present invention can be used as a DO3 (Disk Operator) when constructing a control system using a personal computer or the like.
It is possible to easily realize the sequence control function by simply incorporating the necessary software such as a compiler that runs on the NG System, inserting an I10 card into the turnout card slot, and connecting the controlled device. When a small-scale ladder processing sequence control function is added to such a system, a compiler method that translates the program into machine language each time the program or parameters is changed may be practically acceptable.

[Embodiment] Next, a preferred embodiment of the compiler-type sequence controller according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of a compiler type sequence controller according to the present invention.

In the same figure, reference numeral IO indicates a sequence controller, and this sequence controller IO is a processor 1 that sequentially controls a controlled device according to a program.
It is composed of a personal computer or microcomputer with 2. A keyboard display 14 and an external storage device 16 such as a floppy disk or a magnetic tape cassette are connected to the path line 13 of the processor 12. This keyboard display 1
4 or the external storage device 16 functions as an input device for inputting a sequence program written using ladder language and Boolean algebra, as will be described later.

The pass line 13 further includes R, which holds the compiler.
OM18 is connected, and this compiler inputs input devices such as keyboard display 14 and external storage device 16.
The sequence program that describes the ladder processing sequence input from is translated into a machine language program and stored in RAM2.
2. Note that the operation control of the sequence controller 10 by the processor 12 is performed by a control program stored in the ROM 20.

On the other hand, the sequence controller 10 has I1 (not shown).
An input/output card slot 24 is provided to which a controlled device 30 is connected via a zero card. −7 In this case, processor 1
2 is translated into machine language by the ROM18 compiler and R
The sequence program stored in the AM 22 is sequentially read out, and while a predetermined operation control signal is sent to the controlled device 30 connected via the input/output casslot 24, a state indicating the status of each part from the controlled device 30 is sent. Read signal B, the order set by the sequence program,
Sequence control of the controlled device 30 is performed according to the procedure.

Note that a sequence program stored in the RAM 22 is read out under the control of a control program in the ROM 20 as needed, and a ROM, which is an external storage device, is connected to the pass line 13.
A ROM creation circuit 26 for storing and fixing data in a cassette 28 or the like is connected.

The compiler-type sequence controller according to this embodiment is basically configured as described above, and its operation and effects will be explained next.

First, a ladder sequence program using ladder language and Boolean algebra will be explained. FIG. 2 is a diagram showing an example of a ladder diagram, which is described using the notation of Boolean algebra as follows. That is, in FIG. 2(a), when the a contact X000 is closed and the coil y ooo is energized, in Boolean algebra, xooo = yoo.

...(1) Describe as follows. Further, as shown in Fig. 2(b), when the coil Y000 is energized by closing the a contacts X0OO, X0OI, and X002 connected in series, in Boolean algebra, X 000 * X 001 * X 002 = Y
Described as 000--(2). Similarly, the ladder diagrams shown in FIGS. 2(C) to (f) are as follows: X0OO+X0O1=YOO0...(3)
Described as Y 000...(4). Note that / on the right side of equation (4) indicates that it is a b contact.

A sequence program using the Boolean algebra notation described above can be input directly to the sequence controller IO by key operations on the keyboard display 14 shown in FIG. 1, or the sequence program can be input into another program. It is also possible to set an external storage medium such as a floppy disk or magnetic tape cassette in which the program is created and stored in the external storage device 16 and input it to the sequence controller IO.

Next, the sequence program input from the input means (keyboard display 14, external storage device 16) is
It is translated by the compiler set in OM18, converted into a machine language program as shown in Figure 3, and stored in RAM2.
2. FIG. 3 shows the program steps of equation (2) based on Boolean algebra created based on the ladder diagram shown in FIG. 2, etc., converted into a machine language program using a compiler. In this case, rLD BX.

At X0OIJ, the state data of contact X001 is loaded into register BX. Also, rLD AX.

In X0OOJ, the status data of contact x ooo is the register,
1AX1.1:0-1', and the logical product of the contents of register AX and the contents of register BX is calculated using rAND BXJ, and the result is stored in register BX. Sarani, r.
LD BX and X0O2J load the state data of contact X 002 into register BX, rAND BXJ calculates the AND of the contents of register AX and register BX, and stores the result in register BX. Finally, rOUT YOOO, AXJ Tel;! Register A
The contents of X are output to coil Y 000.

The processor 12 sequentially reads and executes the above sequence programs stored in the RAM 22. The operation control signal A to the controlled device 30 is outputted via the input/output slot 24, and the status signal B from the controlled device 30 is outputted via the input/output card slot 24.
is read by the processor 12 via the input/output card slot 24. Here, when executing a machine language program, for example, one or more machine language programs (object files) translated by a compiler are combined by a linker to create an executable file to be executed on the processor (for example, DO3 etc.). In addition, R.A.
If it is necessary to fix the machine language program stored in the M22 as a ROM, the machine language program is written to the external storage medium of the ROM cassette 28 using the ROM creation circuit 26 under the control of the control program of the ROM 20. . In this case, when creating a ROM, it is converted to a hex file and executed on a dedicated controller. In addition, these days, assemblers and linkers can be easily packaged manually, and the compilation work by a compiler can be limited to just a simple compilation, making it easy to combine programs written in different languages using assemblers and linkers. It is also possible to configure it so that it can be obtained.

[Effects of the Invention] As described above, according to the present invention, a ladder processing sequence is described using Boolean algebra, a sequence program written in Boolean algebra is translated into a machine language program using a compiler, and the sequence program written in the machine language is translated into a machine language program using a compiler. The control device is configured to perform sequence control of the controlled device according to a program.

In this case, a sequence controller can be configured without requiring a separate sequence controller, which would require an increase in hardware, and therefore has the advantage of extremely large cost reduction effects. Also,
This sequence controller does not require an interface between each unit, and can improve reliability as well as cost and space.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments.
Of course, various improvements and changes in design are possible without departing from the gist of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a compiler-type sequence controller according to the present invention, FIG. 2 (a) to (f) are explanatory diagrams of an example of a ladder diagram, and FIG. FIG. 2 is an explanatory diagram of a description using Boolean algebra, showing an embodiment of a compiler-type sequence controller. lO...Sequence controller 12...Processor 14...Keyboard display 16...External storage device 18.20...ROM
22... RAM 24... Output casslot 26... RO creation circuit 28... ROM cassette 30... Controlled device FIG, 2

Claims (1)

[Claims] (1) A processor that sequentially controls a controlled device according to a program, an input means for inputting a sequence program in which a ladder processing sequence is described using Boolean algebra, and a translation of the sequence program input by the input means into a machine language program. 1. A compiler type sequence controller, comprising: a compiler, and configured to perform sequence control of the controlled device based on a machine language program translated by the compiler.