JP2908846B2 - Alarm processing device for NC equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an alarm information processing device for finding a software bug of an NC device.

(Conventional technology) Many NC (CNC) devices are currently on the market and operated by end users. However, there is a bug in the software installed in the NC unit, and this bug sometimes causes strange behavior or does not work at all.

Having expensive machine tools stuck due to software bugs can cause significant damage to end users. Therefore, as a manufacturer on the development side,
I want to find out the cause of the bug as soon as possible and take appropriate measures.

Therefore, conventionally, when a trouble occurs, a technician is dispatched from the manufacturer as necessary, and the countermeasures are taken by trial and error.

In cases where the problem is not reproducible, such as when various conditions overlap, it is difficult to find the cause, and in rare cases it takes several months to complete the measure.

(Problems to be Solved by the Invention) As described above, when there is a software bug in the internal program of the NC device, some trouble has occurred on the user side, and measures have been taken with care.

Accordingly, an object of the present invention is to provide an alarm processing device for an NC device that can easily and quickly find a bug in software of an internal program of the NC device.

[Structure of the Invention] (Means for Solving the Problems) In view of the problems described above, the present invention relates to an input NC
An NC unit that controls various actuators of the NC machine while analyzing the program, an alarm detection unit that detects alarms generated in the NC unit, and an alarm display and alarm number when an alarm is detected by this alarm detection unit The alarm number storage processing unit that writes the alarm occurrence date and time to the alarm history storage unit consisting of a ring buffer in the order of occurrence, the display unit that displays the alarm, the display control unit that controls the display unit, and the self-maintenance support system An IC card reader / writer capable of exchanging information of an alarm history with an IC card to be communicated, a message table storage unit storing a message indicating the content of an alarm corresponding to an alarm number, and a self-diagnosis unit. The diagnostic unit responds to alarms that have occurred consecutively in the past. Alarm history pattern registration unit that registers the condition that it was determined that a software has a bug as an alarm history pattern in the alarm history pattern storage unit, and the alarm history pattern stored in the alarm history pattern storage unit A comparison processing unit for comparing and comparing the stored contents of the alarm history storage unit and a result notifying unit for displaying the result of the comparison. Are displayed in descending order of possibility.

(Embodiment) FIG. 1 is a block diagram of an NC device in which an alarm information processing device of an NC device according to an embodiment of the present invention is integrated into an NC device.

In the figure, an NC device 1 is an NC connected to an NC machine 2.
An NC program input unit 4 such as a tape reader is connected to the unit 3. The NC unit 3 has an internal program, and the input NC
It controls various actuators of the NC machine while analyzing the program.

For example, when the NC processing machine is a press brake that bends the work by relatively moving the punch and the die to the work interposed between the punch and the die, the work in which the thickness is set is set. The depth axis (D axis) which gives the approaching action to the punch and the die according to the condition is plus (+) and minus (-) by a limit switch or the like.
The workpiece is driven within a movable area inside the overtravel position ± MOT defined in the direction, and the work is bent at a predetermined angle. If the D-axis is overtraveled, an alarm is generated and the machine is brought to an emergency stop.

However, this emergency stop can be continued by moving the D axis inward and then restarting. At this time, the cause of this alarm is
It is not known whether it was due to machine reasons, NC program mistakes, or internal program bugs.

Note that a software limit position ± SOT managed by software is defined inside the mechanical overtravel ± MOT of the D axis, and when the D axis exceeds the soft limit position ± SOT, the Stopped.

In addition, when an abnormal pressure is generated in the hydraulic circuit, or when a sensor provided for detecting an abnormality including one specified by software detects an abnormality, an alarm is generated.

These alarms are detected by an alarm detection unit 5 connected to the NC unit 3.

An alarm history storage unit 7 is connected to the alarm detection unit 5 via an alarm number storage processing unit 6. The storage unit 7 includes a display control unit 9 connected to a display unit 8 including a CRT, an IC card reader / writer 11 capable of communicating with an IC card 10, and a self-diagnosis unit connected to the display control unit 9. 12 and each is connected. The display control unit 9
Is connected to the message table storage unit 13. The IC card 10 is used in a self-maintenance support system 14.

FIG. 2 is a block diagram showing a detailed configuration of the self-diagnosis unit 12. As shown in the figure, the self-diagnosis unit 12 stores an alarm history pattern registration unit 15, an alarm history pattern storage unit 16 that stores registered contents, a stored alarm history pattern, and a storage content of the alarm history storage unit 7. It is configured to include a matching processing unit 17 for comparing and matching, and a result notifying unit 18 for displaying a matching result.

FIG. 3 is an explanatory diagram of a ring buffer 7A showing a configuration example of the alarm storage unit 7, and FIG. 4 is an explanatory diagram of a message table 13A stored in the message table storage unit 13.

In FIG. 3, the ring buffer 7A is formed in a ring shape using a dedicated area in the battery backup RAM, and the old information is sequentially erased and new information is sequentially written by the write pointer 19 also backed up by the battery. Have been. The write information here is the alarm occurrence date and time and the alarm number.

In FIG. 4, a message indicating the content of the alarm is stored in the message table 13A in correspondence with the alarm number as described below.

FIG. 5 is a flowchart showing an alarm history storage method performed by the alarm number storage processing unit 6.

When any alarm occurs in step 501, an alarm is displayed in step 502, the alarm number is written in the ring buffer 7A in step 503, the date and time of occurrence is read in step 504, and this date and time is written in the ring buffer 7A in step 505. Writing is performed in correspondence with the alarm number, the pointer 19 is counted up in step 506, and the process returns to the original processing.

By this processing, as shown in FIG. 3, the occurrence date and time and the alarm number are stored in the ring buffer 7A in the order of occurrence, and the occurrence alarm history can be read out by counting down the pointer 19.

In this example, when an alarm occurs while the NC power supply is on, the unique alarm number is stored in the ring buffer 7A, so processing such as sampling at a fixed cycle is unnecessary, and the processing delay of the NC unit is also delayed. Absent.

FIG. 6 is a flowchart showing a display process of the alarm history written in the ring buffer 7A by the process of FIG.

When there is an alarm history display request in step 601, the pointer is input in step 602, the latest alarm number is read in step 603, and the alarm number is read in step 604.
The message of the message table 13 corresponding to this number is displayed on the display unit 8.

Next, at step 605, the date and time of occurrence are read, and at step 606, the date and time of occurrence of the alarm are displayed. The processing of steps 603 to 607 is repeated until the processing is completed.

Therefore, as shown in FIG. 7, the screen 8A of the display unit 8 includes one or more screens in which the alarm number is associated with the message and the occurrence date and time, and the list of the alarm occurrence order is as shown in FIG. Is displayed. This list can, of course, be printed out.

Therefore, the user or the person in charge of the manufacturer
By looking at the list of alarm history displayed on 8A,
The cause of the alarm can be pursued. In particular, by comparing and checking a bug in the internal program of the NC apparatus 1 with a past bug, an alarm history pattern, and an empirical rule, it is possible to know the location of the bug occurrence in the internal program.

In this example, the self-diagnosis unit 12 is provided, and the alarm history pattern stored in the alarm history pattern storage unit 16 can be compared with the alarm history as shown in FIG. , Can be detected automatically.

For example, when alarm A occurs continuously in the past,
The condition that it is determined that the software A has the bug A is stored in the storage unit 16 from the registration unit 15 as an alarm history pattern, and the current alarm is compared with the pattern A, and the matching degree is checked. The probability is expressed as
As shown in the figure, the possibilities can be displayed in descending order. Further, for example, it is possible to inquire about the possibility of a bug with respect to the specific software D, and output the possibility.

To determine the possibility, for a given pattern, if the detected alarm history does not find any other applicable pattern, the pattern is set to 100%, and if there is another applicable pattern, 50% is set. Can be obtained from the pattern similarity for each alarm,
It is not limited to these methods. Further, one or more possible bugs may be displayed instead of the probability display.

This makes it possible to find a bug more efficiently by referring to the screen 8B shown in FIG. 8 and quickly respond, for example, by exchanging the software. The newly found alarm history pattern is registered in the alarm history pattern registration unit 15.

Next, in FIG. 1, the self-maintenance support system 14 is connected to a computer device on the manufacturer side via a communication line such as a telephone line, and when various troubles occur, a method of coping with the troubles is obtained by communication so that the user side can be provided. This allows for quick maintenance processing.

Here, the alarm information processing device of this example includes an IC card
Ten reader / writers 11 are provided, and the contents stored in the alarm history storage unit 7 or the alarm history pattern storage unit 16 of the self-diagnosis unit 12 are stored in the IC card 10 via the self-maintenance support system 14 by the manufacturer. , It is possible for the manufacturer to find the location of the bug. Also, since past alarm history patterns can be sent to the manufacturer side, by inputting this information into the self-diagnosis device on the manufacturer side,
Manufacturers can expand their alarm analysis capabilities.

As described above, according to the alarm information processing apparatus according to the present embodiment, it is easy to reproduce the situation of the occurrence of the trouble, the response can be promptly performed, and the number of man-hours for the serviceman and the developer in charge of the maker side are greatly reduced. it can. Further, since bugs can be removed quickly, the operating efficiency of the machine is not reduced.

[Effects of the Invention] As can be understood from the above description of the embodiments, in short, the present invention analyzes the input NC program while
An NC unit (3) that controls various actuators of the NC processing machine (2), an alarm detection unit (5) that detects an alarm generated in the NC unit (3), and an alarm is generated by the alarm detection unit (5). When detected, an alarm is displayed, and an alarm number and an alarm occurrence date and time are written into an alarm history storage (7) comprising a ring buffer (7A) in the order of occurrence, and are processed for processing.
And a display unit (8) for displaying an alarm and a display unit (8)
Display control unit (9), and an IC card (10) used in a self-maintenance support system (14) and an IC card reader / writer (1) capable of communicating alarm history information
1) and a message table storage unit (13) storing a message indicating the content of the alarm corresponding to the alarm number
And a self-diagnosis unit (12).
The alarm registers the condition that the software corresponding to the alarm was found to have a bug when the alarm occurred continuously in the past as an alarm history pattern in the alarm history pattern storage unit (16). A history pattern registration unit (15), a collation processing unit (17) for comparing and collating the alarm history pattern stored in the alarm history pattern storage unit (16) with the contents stored in the alarm history storage unit (7), Result notification unit that displays collation results (18)
When the probability of the collation degree in the collation processing unit (17) is displayed in the order of probability of the software bug, information such as the storage contents of the alarm history storage unit 7 is displayed. Can be provided to the computer of the self-maintenance support system 14 via the IC card 10, and the manufacturer can find the location of the bug.
Further, according to the above configuration, since the alarm history is compared with the pattern that has occurred before and the software bug is displayed in the descending order of the possibility of the software bug, the bug can be found easily by referring to the display screen. It can respond quickly.

[Brief description of the drawings]

FIG. 1 is a block diagram of an NC device provided with an alarm information processing device according to an embodiment of the present invention. FIG. 2 is a block diagram showing details of a self-diagnosis unit of the alarm information processing device.
The figure is an explanatory diagram of the ring buffer that stores the alarm history,
FIG. 4 is an explanatory diagram of a message table, FIG. 5 is a flowchart showing an alarm history storage processing method, FIG. 6 is a flowchart showing an alarm history display processing method, and FIG.
FIG. 8 is an explanatory diagram of an alarm history display screen, and FIG. 8 is an explanatory diagram of a display example of a self-diagnosis result. 5 Alarm detection unit 7 Alarm history storage unit 8 Display unit (CRT) 11 IC card reader / writer 12 Self-diagnosis unit 13 Message table storage unit 16 Alarm history pattern storage Unit 17: Matching processing unit

Claims (1)

(57) [Claims] An NC unit (3) for controlling various actuators of an NC processing machine (2) while analyzing an inputted NC program, and an alarm detection unit for detecting an alarm generated in the NC unit (3). 5) When an alarm is detected by the alarm detection unit (5), an alarm is displayed, and the alarm number and the date and time of the alarm occurrence are written and processed in the alarm history storage unit (7) comprising a ring buffer (7A) in the order of occurrence. Alarm number storage processing unit (6)
And a display unit (8) for displaying an alarm and a display unit (8)
Display control unit (9), and an IC card (10) used in a self-maintenance support system (14) and an IC card reader / writer (1) capable of communicating alarm history information
1) and a message table storage unit (13) storing a message indicating the content of the alarm corresponding to the alarm number
And a self-diagnosis unit (12).
The alarm registers the condition that the software corresponding to the alarm was found to have a bug when the alarm occurred continuously in the past as an alarm history pattern in the alarm history pattern storage unit (16). A history pattern registration unit (15), a collation processing unit (17) for comparing and collating the alarm history pattern stored in the alarm history pattern storage unit (16) with the contents stored in the alarm history storage unit (7), Result notification unit that displays collation results (18)
And an alarm information processing device for an NC device, wherein when the probability of the collation in the collation processing unit (17) is displayed as a probability, the degree of possibility of software bug is displayed in descending order.