JPH07182015A - Numerical controller with data recovering function - Google Patents

Abstract

PURPOSE:To easily recover data in a volatile memory even when they are erased by the non-expected fault of the volatile memory to be backed up by a battery, the fault of a detection circuit for the remaining power source of the battery or carelessness in the case of exchanging the battery. CONSTITUTION:A check timing detecting means 23 detects the timing of a check by comparing routine check time to require the routine check of the set numerical controller with the time measured by a real time clock circuit 7. When the necessity to perform the routine check of the numerical controller is displayed on a display means 24, at the same time, the check timing detecting means 23 saves the data of the volatile memory into a non-volatile memory by using a data saving means 25. After the routine check, a data recovering means 26 recovers the saved data into the volatile memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller having a function of restoring data in a volatile memory backed up by a battery.

[0002]

2. Description of the Related Art In a conventional numerical control device having a volatile memory backed up by a battery, data stored in the volatile memory is prevented from being inadvertently erased by exhaustion of the battery for backup. Numerical control with a means to detect the remaining battery power and to display the low battery power on the display of the numerical control device, etc. before the remaining battery power is completely exhausted, and prompt the user to replace the battery. There is a device (Japanese Patent Laid-Open No. 5-8114)
(See Japanese Patent Publication No. 7). In addition, instead of directly detecting the remaining power of the battery, the time when the volatile memory is actually backed up by the battery after the power of the numerical controller is turned off is counted, and the counted value is the specified value. There is a numerical control device and the like equipped with a means for displaying on the display device or the like of the numerical control device that the battery should be replaced (see Japanese Patent Laid-Open No. 4-78913). These are all detections of battery life, and the main focus is on prompting battery replacement before the remaining battery power is completely exhausted. FIG. 5 is a flow chart showing an operation example of the numerical controller provided with a means for detecting that the remaining amount of the power source of the battery is low and urging the battery replacement until the remaining amount of the power source of the battery is completely exhausted. It is confirmed whether the battery life is detected by the battery life detecting means (step S
1) If not detected, all processing is terminated. on the other hand,
When the battery life is detected, a message prompting battery replacement is displayed on the display device (step S2), and all the processes are terminated. However, in these numerical control devices, even if the display device of the numerical control device indicates that the remaining battery power is low, if the battery is not replaced, the remaining battery power will be completely lost and backed up by the battery. The data in the volatile memory will be erased. A non-volatile memory capable of electrically rewriting data in a volatile memory that is backed up by a battery when it is detected that the remaining power of the battery is low as a numerical control device equipped with a means for preventing the data from being erased. There is a numerical control device provided with a means for saving data in a flash memory (see Japanese Patent Laid-Open No. 1-241653). Figure 6
Is a numerical controller provided with means for saving data in a volatile memory backed up by the battery to a flash memory, which is an electrically rewritable non-volatile memory, after detecting that the remaining battery power is low. It is a flow chart which shows an example of operation. It is confirmed whether the battery life is detected by the battery life detecting means (step S3), and if not detected, all the processes are ended.
On the other hand, when the battery life is detected, a message prompting battery replacement is displayed on the display device (step S4), and the data in the volatile memory is saved in the non-volatile memory (step S4).
5), all processing is completed.

[0003]

However, the life of the battery actually grows with the progress of technology, and the life of the battery generally employed in the numerical control device reaches 10 years or more. Therefore, it can be said that there is a high possibility that the data in the volatile memory backed up by the battery will be erased by the failure of the volatile memory backed up by the battery before the remaining battery power becomes low. Further, it is fully possible that the detection circuit for the remaining battery power supply will fail. Further, there is a problem that the data in the volatile memory backed up by the battery may be erased due to carelessness when the battery is exhausted and the battery is replaced. The present invention has been made in view of the above problems, and may be performed by a battery due to an unexpected failure of a volatile memory backed up by a battery, a failure of a detection circuit of a remaining battery power supply, or carelessness when performing battery replacement. It is an object of the present invention to provide a numerical control device having a function of easily recovering data that is backed up in a volatile memory and erased.

[0004]

The present invention relates to a numerical control device having a function of saving data in a volatile memory backed up by a battery, and the above object of the present invention is backed up by a battery. Volatile memory, electrically rewritable non-volatile memory, real-time clock for measuring the current time, setting means for setting the periodic inspection time that requires periodic inspection, current measured by the real-time clock Detecting the inspection time by comparing the time with the regular inspection time set in the setting means, and detecting the inspection time, the detection means displaying on the display means that the periodic inspection is required, and the display means When it is displayed that regular inspection is required, the data in the volatile memory is saved to the non-volatile memory. And avoidance means is achieved by the periodic inspection to and a return means for returning the data in the nonvolatile memory when done in the volatile memory.

[0005]

In the present invention, the time at which the periodical inspection of the numerical control device is required is set, and the time measured by the real-time clock is compared with the time at which the periodical inspection of the numerical control device is required. When the periodic inspection time is detected, if it is detected, the display will indicate that the numerical control unit needs regular inspection, and at the same time, the data in the volatile memory will be automatically saved in the flash memory, so it will be backed up by the battery. Even if the data in the volatile memory backed up by the battery is erased due to an unexpected failure of the volatile memory, a failure of the battery power supply remaining amount detection circuit, or carelessness when replacing the battery, It is possible to restore data from a rewritable non-volatile memory to a volatile memory backed up by a battery.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of hardware of a numerical control device having a data recovery function of the present invention. A flash memory is used in the ROM 3 and a system program is stored therein. The CPU 2 controls the entire numerical controller 1 according to the system program stored in the ROM 3.
A DRAM or the like is used as the RAM 4, and various data or input / output signals are stored therein. The CMOS memory 5 is a volatile memory, which is backed up by the battery 6 and stores system parameters, machining programs, tool offsets, and the like that should be retained even after the main power supply 10 is cut off. CM
The OS memory 5 is provided with a memory area 5a, in which the manufacturing date and the periodical inspection time of the parts requiring inspection are stored.

RTC (Real Time Cloc)
k) The circuit 7 counts the time by the crystal oscillator operated by the battery 6, like the general digital clock, and the output data can be read from the CPU 2. The voltage drop detection circuit 8 detects that the voltage of the battery 6 has dropped below a certain value voltage and below the memory holding limit voltage. Further, the voltage drop detection circuit 8 is connected to the input port 9 so that the CPU 2 can recognize that the voltage drop has been detected. The power supply switching circuit 11 is a main power supply 10 when the main power supply 10 is turned on to a circuit requiring backup.
Therefore, when the main power supply 10 is cut off, the power supply is switched so that the power is supplied from the battery 6. Serial port 12
Inputs and outputs data and is connected to an external storage device (not shown) such as a paper tape or a floppy disk. The display control circuit 13 converts the digital signal into a display signal and gives it to the display unit 17. A CRT or a liquid crystal display device is used as the display unit 17, and the current position of each axis is displayed.
Parameters and alarm messages are displayed. The keyboard interface 14 receives the data from the keyboard 18 and transfers it to the CPU 2. The digital I / O 15 exchanges input / output signals with the machine side. The servo control circuit 16 outputs a current command for controlling the motor 19. These components are coupled to each other by the system bus 20.

FIG. 2 is a block diagram showing an example of the data recovery function of the present invention. When the numerical control device is powered on, the periodic inspection time setting means 21 selects the earliest inspection time from the periodic inspection times of the parts stored in the memory area 5a that require periodic inspection. Set as the regular inspection time. Next, the inspection time detection means 23 fetches the regular inspection time D1 from the regular inspection time setting means 21 and the measurement time D2 (current time) from the real-time clock circuit 7, compares the regular inspection time D1 with the measurement time D2, and measures the measurement time. If D2 has reached the regular inspection time D1, a signal SIG1 indicating that it has been reached is output to the display means 24. When the display means 24 receives the signal SIG1 from the inspection time detection means 23, a message indicating that the inspection is necessary (for example, "Periodic inspection time. Please perform the periodic inspection.
Replace the battery at the same time. ") And a signal SIG2 indicating that a message is displayed at the same time
Is output to the data saving means 25. Data saving means 25
As soon as the signal SIG2 is received from the display means 24, the ROM holds the data held in the CMOS memory 5.
3 (flash memory).

At this point, the operator recognizes that it is necessary to perform a periodical inspection, and inspects the numerical control device according to the periodical inspection procedure described in the instruction manual or the like by the displayed message. If necessary, contact a service person to perform maintenance. The contents of the periodic inspection include, for example, checking the voltage of the battery, checking the operation of the volatile memory backed up by the battery, and checking the operation of the detection circuit of the remaining battery power. Even if the data held in the volatile memory which is accidentally backed up by the battery is erased during the periodic inspection work, the data is saved in the ROM 3 (flash memory) by the data saving means 25, so that the data is restored by the following means. Can be made. The data restoration means 26 completes the inspection work (for example, a code such as "C" indicating that the inspection work is completed from the keyboard 18 after the inspection work is completed.
HECKO ") and the held data saved in the ROM 3 (flash memory) are returned to the CMOS memory 5, and the reset signals RST1, RST2, and RST3 are reset to reset the signals SIG1 and SIG2. The data is output to the display means 24. If there is a replaced part, the data (manufacturing date, periodic inspection time, etc.) of the replaced part stored in the memory area 5a is updated.

FIGS. 3 and 4 are flowcharts of an operation example of the device of the present invention. FIG. 3 shows before regular inspection, and FIG. 4 shows after regular inspection. Periodic inspection time D in the periodic inspection time setting means 21
1 is set (step S11). Inspection time detection means 2
3 reads the measurement time D2 from the real-time clock circuit 7 (step S12). The inspection time detection means 23 uses the regular inspection time D1 set in the regular inspection time setting means 21.
And the measurement time D2 are compared (step S13), and D1 <D
If it is 2, the process proceeds to step S14, and if D1> D2, the process is not performed. When D1 <D2, the inspection time detection means 23 displays a message notifying the inspection time on the display means 24 (step S14). The data saving means 25 saves the data in the volatile memory to the flash memory (step S
15). The data restoring means 26 checks whether CHECKKOK has been input (step S16), and if detected, advances to step S17, and if not detected, does not process. The data restoring means 26 restores the data saved in the flash memory to the volatile memory (step S17), and if there is a replaced component, updates the regular inspection time of the replaced component in the regular inspection time setting means 21 (step S17). S1
8) Clear the regular inspection time D1, the signal SIG1, and the signal SIG2 of the inspection time detection means 23 (step S1).
9).

[0011]

As described above, according to the numerical controller having the data recovery function of the present invention, the data in the volatile memory backed up by the battery is used for the display guide function of the periodical check of the numerical controller. By adding a means to save to an electrically rewritable nonvolatile memory, the data in the volatile memory that is automatically backed up by the battery at the time of regular inspection can be electrically rewritten. Data in the volatile memory that is backed up by the battery due to an unexpected failure of the volatile memory backed up by the battery, a failure of the battery power supply remaining amount detection circuit, or carelessness when replacing the battery. Even if the data is erased, it is backed up by a battery from an electrically rewritable non-volatile memory. It is the volatile memory it is possible to recover the data, it is easy to restore a numerical control apparatus. Further, when the periodic inspection time comes, if the display device of the numerical control device is urged to replace the battery before the battery life is reached and the operator is requested to replace the battery, careless work due to the battery life may occur. Without this, it is possible to take preventive measures against mechanical failure.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a numerical control device having a data recovery function of the present invention.

FIG. 2 is a block diagram showing an embodiment of a data recovery function of the present invention.

FIG. 3 is a first flowchart illustrating an operation example of the device of the present invention.

FIG. 4 is a second flowchart illustrating an operation example of the device of the present invention.

FIG. 5 is a flowchart explaining an operation example of an example of a conventional numerical control apparatus.

FIG. 6 is a flowchart illustrating an operation example of another example of the conventional numerical control device.

[Explanation of symbols]

 1 Numerical Control Device 7 RTC Circuit 21 Regular Inspection Time Setting Means 23 Inspection Timing Detecting Means 24 Display Means 25 Data Saving Means 26 Data Restoring Means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06F 12/16 340 Q 9293-5B G06F 1/00 333 C

Claims (1)

[Claims] 1. A numerical controller, comprising: a volatile memory backed up by a battery; and an electrically rewritable nonvolatile memory, capable of saving data in the volatile memory to the nonvolatile memory. Check the real time clock to measure the time of, the setting means for setting the periodic inspection time that requires periodic inspection, the current time measured by the real time clock and the regular inspection time set in the setting means When detecting the time and detecting the inspection time, the display means indicates that the periodic inspection is necessary, and the display means indicates that the periodic inspection is necessary. Saving means for saving data to the non-volatile memory, and the data in the non-volatile memory before the regular inspection is completed. Numerical control apparatus having a data recovery function, characterized in that it includes a return means for returning to the volatile memory.