JPH08137523A - Numerical controller - Google Patents

Abstract

PURPOSE: To easily perform a cause investigation at the time of a defective operation by recording command contents when an operation is performed by a direct command from a host device. CONSTITUTION: A command monitoring means 3 monitors the direct command commanded from the host device 2 and records the contents of command in a recording means 7 when the command is received. Then, a reception judgement means 4 judges whether or not the numerical controller 1 can accept the command. An execution completion monitoring means 5 monitors the execution of the command and its execution completion and records the result in the recording means 7 when acception is permitted and an inhibition factor judgement means 6 judged that the acception is inhibited and its factor and records them in the recording means 7 when the acception is inhibited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller, and more particularly to a numerical controller which is connected to a host device and whose main operation is instructed by a direct command from the host device.

[0002]

2. Description of the Related Art Conventionally, a host computer such as a mainframe or a cell controller may be connected to control a slave numerical control device from the host device.
For example, there is a case where it is not desired to use the NC program in the numerical control device, or where the host side wants to manage all the information. In this case, the numerical control device is set to a mode for receiving a command from the host device and operates by the direct command commanded by the host device.

On the other hand, the numerical control device is provided with means for leaving an alarm occurrence or key operation as a history as its operation history.

[0004]

By the way, when the numerical control device is operated by the direct command instructed by the host device to perform the main operation, it seems that the numerical control device thinks that the host device gives the command. May not work. In such a case, while changing various commands from the host side, it is necessary to analyze which command has an error and investigate the cause.

As described above, in the numerical control device which operates by the direct command from the host device, when the operation is not according to the command, it is sufficient to investigate the operation history of the numerical control device in order to find the cause. In the conventional numerical control device, there is only means for leaving a history of key operations, etc., and it takes time and labor to analyze the cause from the host side.
There was a problem.

The present invention has been made in view of the above point, and it is possible to easily analyze the cause of a malfunction when the operation is performed by a direct command from the host device while leaving the contents of the command. It is an object of the present invention to provide a numerical control device that can be used.

[0007]

In order to solve the above-mentioned problems, the present invention provides a numerical controller which is connected to a host device and whose main operation is instructed by a direct command from the host device. Command monitoring means for monitoring a command, acceptance determining means for determining whether or not the command received from the host device can be accepted, and execution completion monitoring means for monitoring whether or not the execution of the accepted command is completed, An unacceptable factor determining means for determining the cause of an unacceptable command, and a command received by the command monitoring means,
A numerical control device comprising: a result of the acceptance determining means; and a recording means for recording, as a history, the completion of execution of a command that can be accepted by the execution completion monitoring means or the factor by the inability factor determining means. Will be provided.

[0008]

According to the above-mentioned means, the command monitoring means monitors the command of the direct command from the host device, and if there is a command, after recording the content of the command in the recording means, it is determined whether the command can be accepted. The acceptance determination means determines. If it can be accepted, the command is executed so that the execution completion monitoring means records the start and completion in the recording means, and if the command cannot be accepted, the unacceptable factor determining means records the factor in the recording means.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of a numerical controller according to the present invention.

According to this figure, a numerical controller (CNC) 1 according to the invention is connected to receive a direct command from a host device 2. In the numerical control device 1, a command monitoring means 3 for monitoring a command from the host device 2 is provided, and its output is connected to the acceptance determination means 4. The acceptance determining means 4 is connected to the execution completion monitoring means 5 and the inability factor determining means 6 which perform processing according to the determination result, and outputs of these are recorded in the recording means 7.
It is connected to the. This recording means 7 is also connected to the output of the command monitoring means 3.

When a direct command is issued from the host device 2, the command monitoring means 3 of the numerical controller 1
Receives the command and records the content of the command in the recording means 7
To record. Next, the acceptance judgment means 4 judges whether or not the current numerical control apparatus 1 is in the acceptable state for the command. If the acceptance determining means 4 determines that the command can be accepted, the execution completion monitoring means 5 monitors the execution and completion of the command and records the result in the recording means 7 as a history. On the other hand, if the acceptance determining unit 4 determines that the command cannot be accepted, the unacceptable factor determining unit 6 determines the factor of the command that cannot be accepted and records the factor in the recording unit 7 as a history. To do.

FIG. 2 is a flow chart showing the procedure of command history recording. According to this flowchart, first, it is checked whether or not there is a direct command command from the host device, and if there is no command command, the process waits until a command is received (step S1). If a command is issued in step S1, the contents of the command are recorded as a history (step S2). Then, it is determined whether the command from the host device can be accepted (step S3). That is, it is checked whether or not the received command is ready for the current numerical control device. If it is determined in step S3 that the received command can be executed by the numerical controller, the process waits until the received command is executed (step S4). Then, when the command is started, the fact that the command is started is recorded (step S5), and the completion of the execution for the command is waited (step S5).
6). When the command execution is completed, the execution completion is recorded (step S7).

On the other hand, if it is determined in step S3 that the received command is not in the executable state for the current numerical control device, it is recorded that the command cannot be accepted and the reason why the command cannot be accepted (step S3). S
8).

After step S7 or S8, the command recording pointer is updated (step S9). That is, in the recording means for recording the history, the command recording pointer is moved to the position for storing the next history data.
Thereby, the direct command from the host device and the operation result in the numerical control device can be sequentially recorded.

FIG. 3 is a diagram showing a storage image of history data. The history data for the direct command is recorded in an additional format in a file created in the memory.
The history data is configured to record four items for one direct command. That is, in the file 8 for storing history data, an area 8a for writing an item indicating a command type, an area 8b for writing an item indicating a parameter, etc., and a determination result indicating whether or not a command can be accepted are shown. There are an area 8c for writing an item and an area 8d for writing an item indicating the execution completion of a command or a factor that cannot accept a command. Reference numeral 9 indicates a command record pointer.

In the illustrated example, "01H" is written in the area 8a, which is a function code representing a fast-forward command, for example. Although "100000" is written in the area 8b, this is a numerical value representing the amount of movement, for example, and is entered in a set unit. Therefore, if the setting unit is micron, it means "100" millimeter in this example. In the area 8c, for example, “0” is written if the judgment result indicates that the command can be accepted, and “1” is written if the judgment result indicates that the command cannot be accepted.

In the area 8d, data relating to command execution or data relating to an unacceptable factor is written depending on whether the command can be accepted or not. For example, when the area 8c is "0" that can accept commands, what is written in this area 8d is that "0" is written at the time when the command execution is started, and then this value is written. Is rewritten to "1" when the command execution is completed. As a result, it is possible to record in one area whether or not the command has been executed to completion when the history is viewed later. If area 8
If c is "1" that the command cannot be accepted,
A numerical value corresponding to a factor that the numerical control device cannot execute is written. For example, "1" means "servo alarm", "2" means "overtravel alarm", and "3".
Represents "during execution of previous command" ..., here, it is indicated that the numerical control device is in an inoperable state due to a servo alarm.

When the writing to the area 8d is completed, the command recording pointer 9 is moved to the position of the first area 8a for storing the next history data. FIG. 4 is a block diagram showing a schematic configuration of hardware of the numerical controller according to the present invention.

The numerical controller is mainly composed of a processor 11. The processor 11 includes a read only memory (ROM) 12 and a random access memory (RA
M) 13, non-volatile memory 14, memory card 15, D
I / DO (digital input / output circuit) 16, axis control circuit 1
7 and programmable machine controller (PM
C) 18 are connected to each other via a bus 19. D
The I / DO 16 is connected to the host device 2, and the axis control circuit 1
7 is connected to a machine tool 30 via a servo amplifier 20, and a programmable machine controller 18 is also connected to the machine tool 30. Numerical control device is also CR
T / MDI (Cathode Ray Tube / Manual Data Input)
The CRT / MDI unit 21 is provided with the unit 21.
Is composed of a graphic control circuit 22, a display device 23, a keyboard 24 and a software key 25. Among them, the graphic control circuit 22, the keyboard 24 and the software key 25 are connected to the bus 19.

The processor 11 controls the entire numerical controller according to the system program stored in the read-only memory 12. The read-only memory 12 also stores a program for recording history. The random access memory 13 is set with a work area for executing the history recording program, and also stores temporary calculation data, display data, input / output signals and the like during numerical control. The non-volatile memory 14 is backed up by a battery (not shown) and stores parameters, machining programs, tool correction data, pitch error correction data, history data such as alarms, which should be retained even after the power is turned off.

In the memory card 15, the contents of the operation history in the numerical control device by the direct command from the host device 2 are recorded as a file. By recording the history contents in the memory card 15, it is not necessary to secure a large-capacity recording area in a memory such as the non-volatile memory 14.

When the DI / DO 16 receives a direct command command from the host device 2, it passes it to the processor 11 via the bus 19. The processor 11 will execute the command.

The CRT / MDI unit 21 is arranged on the front surface of the numerical controller or at the same position as the machine operation panel,
Used for displaying data and graphics, inputting data, and operating numerical control devices. The graphic control circuit 22 converts a digital signal such as history contents, numerical data and graphic data recorded in the memory card 15 into a raster signal for display, and sends the raster signal to the display device 23, which displays the numerical value and graphic data. Is displayed.

The keyboard 24 is composed of numerical keys, symbolic keys, character keys and function keys, and is used for creating and editing a machining program and operating the numerical control device. The software key 25 is provided below the display device 23, and its function is displayed on the display device 23. When the screen of the display device 23 changes, the function of the software key 25 also changes corresponding to the displayed function.

The axis control circuit 17 receives the axis movement command from the processor 11 and outputs the axis movement command to the servo amplifier 20.
Output to. The servo amplifier 20 amplifies this movement command and drives the servo motor coupled to the machine tool 30,
It controls the relative motion of the tool and the work of the machine tool 30. The axis control circuits 17 and the servo amplifiers 20 are provided by the number corresponding to the number of axes of the servo motor.

Programmable machine controller 1
The processor 8 receives an M (auxiliary) function signal, an S (spindle speed control) function signal, a T (tool selection) function signal and the like from the processor 11 via the bus 19. Then, these signals are processed by a sequence program and output signals are output to control pneumatic equipment, hydraulic equipment, electromagnetic actuators and the like in the machine tool 30. In addition, it receives a button signal, a switch signal, and a contact signal such as a limit switch from the machine control panel in the machine tool 30 to perform sequence processing,
The necessary input signals are transferred to the processor 11 via the bus 19.

In the illustrated example, the spindle motor control circuit and the spindle amplifier for driving the spindle motor are omitted. In the above configuration example, the number of the processor 11 is one, but a plurality of processors may be used to form a multiprocessor configuration. Further, the connection with the host device 2 is not limited to DI / DO 16 and can be made through RS232C or by bus coupling.

[0028]

As described above, according to the present invention, the history of the command contents instructed can be recorded in the numerical controller operated by the direct command from the host device. This makes it possible to trace the operation history inside the numerical control device when investigating the cause when the operation of the numerical control device does not work according to the command from the host device. Since the command error is not investigated while changing various commands, the efficiency of the cause investigation is improved.

Further, since the history contents are recorded in the memory card, it is not necessary to secure a large-capacity recording area such as a non-volatile memory in the numerical controller.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a numerical controller according to the present invention.

FIG. 2 is a flowchart showing a procedure of command history recording.

FIG. 3 is a diagram showing a storage image of history data.

FIG. 4 is a block diagram showing a schematic configuration of hardware of a numerical controller according to the present invention.

[Explanation of Codes] 1 Numerical control device 2 Host device 3 Command monitoring means 4 Acceptance judging means 5 Execution completion monitoring means 6 Impossible factor judging means 7 Recording means 8 File 9 Command recording pointer

Claims (4)

[Claims] 1. A numerical controller, which is connected to a host device and whose main operation is instructed by a direct command from the host device, includes command monitoring means for monitoring a command from the host device, and a command monitoring means for receiving the command from the host device. Acceptance determination means for determining whether the command can be accepted, execution completion monitoring means for monitoring whether or not the execution of the accepted command is completed, and non-factor determination for determining the cause of the command that cannot be accepted Recording means for recording the command received by the command monitoring means, the result of the acceptance determining means, and the completion of execution of the command that can be accepted by the execution completion monitoring means or the factor by the unacceptable factor determining means as a history; A numerical control device comprising: 2. The numerical controller according to claim 1, wherein the recording means is a memory card for recording the contents of the history as a file. 3. The recording means stores an area for recording a command, an area for recording a parameter, etc., an area for recording a determination result as to whether or not a command can be accepted, and a command execution completion or command unacceptability factor. The numerical controller according to claim 1, further comprising a recording area. 4. The connection with the host device is DI / DO.
It is configured to be performed via the
Numerical control device described.