JPH0782377B2 - Numerical control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a numerical controller capable of rewriting parameters such as soft limit values used by a system control unit by a high-level language program.

[Prior Art] As a conventional numerical control device (hereinafter referred to as NC device),
There was one shown in FIG. In Figure 2, (1) is
The system control unit (2) for controlling the entire NC device is described in a numerical control language (hereinafter referred to as NC language), and the numerical control program (hereinafter referred to as NC program) stored in the disk (3) Numerical control language control unit (hereinafter referred to as NC language control unit) for starting, stopping, decoding, etc., (4) is written in a sequence language, and starts and stops the sequence program stored in the disk (5). And a sequence control unit for decoding, (6)
Is written in a high-level language such as BASIC language, FORTRAN language or C language, and a high-level language control unit (8) for starting, stopping and decoding the high-level language program stored in the disk (7) is The interface between the system control unit (1) and the NC language control unit (2), (9) the interface between the system control unit (1) and the sequence control unit (4), and (20) the system control unit (1). Interface with high-level language control unit (6), (10) interface with NC language control unit (2) and sequence control unit (4), (11) with NC language control unit (2) and high-level language control unit ( 6) interface, (12) interface between sequence control section (4) and high-level language control section (6), (13) machine tool (15) via drive amplifier (14)
Is a drive control unit for driving the motor (16), (17) is a sequence control unit (4), a machine tool control panel (18), and an interface (21) between the machine tool (15) is a system control unit (1). A data memory for storing parameters such as soft limit values to be used, and (22) is a setting display panel for inputting programs and displaying movements of the NC device.

The NC program and the high-level language program are independently edited and stored in the disks (3) and (7) as programs of the NC device, respectively.

Further, the data memory (21) has parameters written in advance by the setting display panel (22).

Furthermore, a high-level language program can perform complex logical operations at high speed, but if the same program is tried to be executed by an NC program or a sequence program, the program becomes complicated and it takes a long time to execute. It becomes impossible to control the machine tool. Therefore, a high-level language program was used to perform complicated logical operations.

Next, the operation of the conventional numerical control device will be described. During automatic operation, NC programs stored in the disk (3) are sequentially executed. The NC program drives and controls the motor (16) via the system controller (1), the drive controller (13) and the drive amplifier (14) to move the machine tool (15).

Next, the sequence control unit (4) sends a signal from the machine tool (15) and the machine tool control panel (18) via the interface (17) according to the operation of the machine tool (15), for example, from the machine tool (15). When a signal indicating the position of the machine (15) is input to the sequence control unit (4) through the machine input / output interface (17) (for example, a signal from a limit switch), the sequence program is executed according to the input signal. . This sequence program may contain an instruction to start an NC program or a high-level language program.

In that case, the NC program started by the sequence program sends a signal to the system control unit (1) via the NC language control unit (2) and the interface (8). Based on this signal, the system control unit (1) drives the drive control unit (1
A control signal is sent to the motor (16) via 3) and the drive amplifier (14) to drive and control the machine tool (15).

The high-level language program activated by the sequence program performs logical operation and sends the result to the system control unit (1) via the high-level language control unit (6) and the interface (20). The system control unit (1) outputs a signal (for example, a parameter such as a coordinate value indicating the position of the machine tool (15)) output from the machine tool (15) and a data memory (2).
The parameter (for example, soft limit value) stored in 1) is compared, and when the machine tool (15) exceeds the soft limit value, an alarm is displayed on the setting display panel (22). The soft limit value is a value indicating a range in which the machine tool (15) can be moved programmatically.

[Problems to be Solved by the Invention] By the way, the conventional NC device having the above configuration controls the range in which the machine tool (15) can move by changing the tool attached to the machine tool (15) during automatic operation. There is a problem that the parameters stored in the data memory (21) cannot be changed even if it is necessary to change the parameters depending on the state of the machine tool (15), such as when changing the soft limit switch value. .

The present invention has been made to solve the above problems,
An object of the present invention is to provide a numerical control device capable of changing parameters stored in a data memory (21) such as a soft limit value even during automatic operation.

[Means for Solving Problems] A numerical control device according to the present invention includes a system control unit that controls the entire numerical control device, and a first storage unit that stores a numerical control program written in a numerical control language. , A numerical control language control unit for automatically controlling a machine tool by a numerical control program written in a numerical control language, a second storage means for storing a sequence program written in a sequence language, and a machine tool using the sequence program. A sequence control unit for performing sequence control, a third storage means for storing a high-level language program written in a high-level language, and a high-level language for performing logical operation and automatic control of a machine tool by the high-level language program written in a high-level language. Numerical control device provided with control section and data memory for storing parameters used by sequence control section In the sequence program, a sequence program is provided with high-level language program control means for activating a high-level language program in response to a command of the sequence program, and an interface arranged between the high-level language control unit and the data memory of the system control unit. Command, the contents stored in the data memory are rewritten from the high-level language control section during automatic operation.

[Operation] In the numerical controller having the above configuration, the system control unit has the numerical control program stored in the first storage means, the sequence program stored in the second storage means, and the third control program.
The high-level language program stored in the storage means is controlled, and the numerical control language control section, the sequence control section, and the high-level language control section execute the numerical control program, the sequence program, and the high-level language program, respectively. Further, the high level language program control means causes the sequence control unit to activate the high level language program. Furthermore, the parameters stored in the data memory are rewritten from the high-level language control unit during the automatic operation by the instruction of the sequence program, if necessary.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram of a numerical controller according to the present invention. It should be noted that in FIG. 1, parts having the same functions as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 1, (23) is an interface between the high-level language control section (6) and the data memory (21). The high-level language control section (6) rewrites the stored contents of the data memory (21) via this interface (23).

Next, the operation of the numerical controller according to the present invention will be described. The NC stored in the disk (3) during automatic operation
The programs are executed sequentially. The NC program consists of the system controller (1), drive controller (13) and drive amplifier (14).
The motor (16) is driven and controlled via the to move the machine tool (15).

Next, the sequence control unit (4) sends a signal from the machine tool (15) and the machine tool control panel (18) via the interface (17) according to the operation of the machine tool (15), for example, from the machine tool (15). When a signal indicating the position of the machine (15) is input to the sequence control unit (4) through the machine input / output interface (17) (for example, a signal from a limit switch), the sequence program is executed according to the input signal. . At this time, if the tool of the machine tool (15) is replaced and the soft limit value stored in the data memory (21) needs to be changed, the sequence program starts the high-level language program via the interface (12). .

The high-level language program started by the sequence program rewrites the soft limit value stored in the data memory (21) via the interface (23).

In this embodiment, the case where the soft limit value stored in the data memory (21) is rewritten by the high-level language program has been described, but other parameters can be rewritten in the same manner.

[Effects of the Invention] As described above, according to the present invention, an interface is provided between the high-level language control unit and the data memory of the system control unit so that the machine tool can be operated according to the state of the machine tool even during automatic operation. Since the parameters such as the soft limit value stored in the data memory are rewritten from the high-level language control unit by the command of the sequence program, the machine tool controlled by the numerical control device is highly safe and highly accurate. A numerical control device capable of controlling a machine tool can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of a numerical controller according to the present invention, and FIG.
The figure is a block diagram of a conventional numerical control apparatus. In each figure, 1 is a system control unit, 2 is an NC language control unit, 3,
5, 7 are disks, 4 is a sequence controller, 6 is a high-level language controller, 8, 9, 10, 11, 12, 20, 23 are interfaces, 13 is a drive controller, 14 is a drive amplifier, 15 is a machine tool. , 16 is a motor, 18 is a machine tool operation panel, 21 is a data memory, and 22 is a setting display panel. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A system control unit for controlling the entire numerical control device, a first storage means for storing a numerical control program written in a numerical control language, and a numerical control program written in the numerical control language. A numerical control language control unit for automatically controlling the machine, and a second storage means for storing a sequence program described in a sequence language,
A sequence control unit that controls the sequence of the machine tool by the sequence program, a third storage unit that stores a high-level language program written in a high-level language, and a logical operation and a logical operation by the high-level language program written in the high-level language. In a numerical control device comprising a high-level language control section for automatically controlling the machine tool and a data memory for storing parameters used by the sequence control section, the high-level language is instructed to the sequence control section by an instruction of the sequence program. A high-level language program control means for activating a program, and an interface arranged between the high-level language control unit and a data memory of the system control unit are provided, and the high-level language during automatic operation is instructed by a command of the sequence program. Storage of the data memory from the control unit Numerical control device being characterized in that so as to rewrite the contents.