JP4678217B2 - Method and apparatus for managing numerical control apparatus - Google Patents

Description

  The present invention relates to a method and apparatus for managing a numerical control apparatus that is purchased or leased in installments, and more particularly to a management method and apparatus for a numerical control apparatus that can manage the expiration date of the numerical control apparatus. .

If the balance is not paid by the due date for equipment such as a machine tool with a numerical controller purchased by installment payment, there is a demand for the seller to stop using the equipment. In addition, for leased office machines and construction equipment, there is a demand for leasing companies to stop using the equipment as soon as the lease term has passed.
By the way, as a conventional device for restricting execution by setting an expiration date, there are devices that restrict the operation of paid software, and these devices record the expiration date encrypted in the program and the current time and It is set as the structure which restrict | limits operation | movement by comparing (for example, refer patent document 1).

JP-A-62-266622 (first page, FIG. 1, FIG. 2)

  In the conventional program operation timing device as described above, the developer sets a fixed expiration date. Therefore, when extending the expiration date, we provide software with the expiration date again from the developer. There was a problem of having to.

  In addition, there is a method in which the expiration date can be stored in a setting file or the like so that it can be changed.

  In general, when setting an expiration date in a numerical control device, it is common to set an expiration date in a ladder program. In this case, most of the expiration date cannot be changed by setting a password. However, if the password is leaked, the expiration date can be easily changed.

  The present invention has been made to solve such a problem, and by using an encryption code that can be arbitrarily selected by a distributor such as a machine tool manufacturer or a leasing company, the expiration date is encrypted. Management method for numerical control devices that can prevent the expiration date from being changed by the three parties, and the expiration date cannot be changed even if the encryption method leaks by changing the encryption code for each device And to obtain the device.

  Further, the present invention encrypts a number for identifying a numerical control device such as a manufacturing number together with an expiration date, so that the encrypted release code cannot be used other than the intended numerical control device, and the same expiration date is used. It is an object of the present invention to obtain a management method and apparatus for a numerical control device that can prevent the spread of a wide spread.

  The method for managing a numerical control device according to the present invention includes a step of inputting an encryption key for encrypting the expiration date into the numerical control device, and encrypting the expiration date outside the numerical control device using the encryption key. Inputting the converted release code into the numerical control device; restoring the release code input into the numerical control device to the expiration date using the encryption key previously input; and the expiration date and the current date and time If it is determined that the expiration date has been expired by this comparison, the stage of limiting the use of the numerical control device, and the expiration date of the numerical control device during automatic operation, It does not immediately make the drive device inoperable, but prohibits the next automatic activation.

  The numerical control device management method of the present invention includes a step of inputting an encryption key for encrypting the expiration date and a number or symbol provided to identify the numerical control device to be managed into the numerical control device; Inputting a release code obtained by encrypting an expiration date and a number or symbol provided for specifying a numerical control device to be managed using the encryption key outside the numerical control device into the numerical control device; The cancellation code input in the numerical controller is restored to the expiration date and the number or symbol provided for identifying the numerical controller to be managed by the encryption key, and the restored numerical controller to be managed is obtained. When the number or symbol provided for identification is the same as the number or symbol provided for identifying the numerical controller to be managed that is set in advance in the numerical controller In this case, the expiration date is set in the numerical control device, and if they are not the same, the expiration date is not set in the numerical control device and the expiration date is compared with the current date and time. If it is determined that the time limit has expired, the use of the numerical control device is restricted, and if the time limit expires during the automatic operation of the numerical control device, the drive device immediately becomes inoperable. Rather than performing, the next automatic activation is prohibited.

  In addition, when the expiration date valid flag is on, the numerical control device management method of the present invention permits only the operation for correcting the current date and time in the direction of advancing, and prohibits the operation of correcting the date and time in the direction of delay. Is.

  Also, the numerical control device management method of the present invention outputs an alarm when it is determined that the expiration date has expired.

  Also, the management method of the numerical control device of the present invention outputs a warning that the expiration date will expire in a few days if the expiration date expires in a few days.

  Also, the management method of the numerical control device of the present invention makes the drive device inoperable when the expiration date has expired when the numerical control device is powered on.

  Further, according to the management method of the numerical controller of the present invention, when it is determined that the expiration date has expired, the numerical control is performed again by inputting a release code in which the future date and time are encrypted from the current date and time. The device can be used.

  The management device of the numerical control device according to the present invention includes an encryption key input means for inputting an encryption key for encrypting the expiration date into the numerical control device, and a numerical value for the expiration date using the encryption key. Release code input means for inputting the release code encrypted outside the control device into the numerical control device, and the release code for restoring the release code input into the numerical control device to the expiration date using the encryption key input in advance An analysis means, an expiration date check means for comparing the expiration date and the current date and time, a means for restricting the use of the numerical control device when it is determined by the expiration date check means that the expiration date has expired, If the expiry date of the numerical control device expires during automatic operation, the automatic start prohibiting means for prohibiting the next automatic start is used instead of making the drive device inoperable immediately. It is intended to.

  Further, the management device of the numerical control device according to the present invention is an encryption in which an encryption key for encrypting an expiration date and a number or symbol provided for specifying a numerical control device to be managed is input into the numerical control device. Entering into the numerical control device a release code encrypted outside the numerical control device by the key input means and the number or symbol provided to identify the expiration date and the numerical control device to be managed using the encryption key The release code input means to be restored and the release code input in the numerical control device are restored to the number or symbol provided for specifying the expiration date and the numerical control device to be managed by the encryption key, and restored. A number or symbol provided to identify the numerical control device to be managed is provided to identify the numerical control device to be managed that is set in advance in the numerical control device. If it is the same as the number or symbol, the expiration date is set in the numerical controller, and if it is not the same, the cancellation code analyzing means for not setting the expiration date in the numerical controller, the expiration date and the current date and time The expiry date checking means for comparing the expiry date, the expiry date checking means, and the expiry date during the automatic operation of the numerical control device. In the event that it has expired, it does not immediately make the drive device inoperable, but has automatic start prohibiting means for prohibiting the next automatic start.

  In addition, the management device of the numerical control device according to the present invention permits only an operation to correct the current date and time in the direction of advancing the current date and time, and prohibits an operation to correct the date and time in the direction of delay when the expiration date valid flag is on. Date update prevention means is provided.

  The management device of the numerical control device of the present invention is provided with an alarm output means for outputting an alarm when it is determined that the expiration date has expired.

  The management device of the numerical control device of the present invention is provided with an alarm output means for outputting a warning that the expiration date will expire in a few days if the expiration date is expired in a few days.

  In addition, the numerical control device management device of the present invention is provided with drive unit control means for making the drive device inoperable when the expiration date has expired when the numerical control device is powered on.

  Also, the management device of the numerical control device according to the present invention inputs a release code in which a future date and time is encrypted from the current date and time when it is determined by the expiration date check means that the usage date has expired. Thus, the numerical control device can be used again.

  According to this invention, when there is no predetermined deposit for the user who repays the remaining cost by installment payment, the use of the numerical control device can be restricted, so that there is an effect that reliable cost recovery can be performed.

  Further, according to the present invention, by using electronic data such as an encryption key and a release code, additional hardware is not required, so that an increase in hardware cost can be suppressed.

  According to the present invention, the number or symbol provided for specifying the numerical control device to be managed and the expiration date are both encrypted and used as a release code, so that it can be easily adapted to other machine tools. There is an effect that can be prevented.

  Moreover, according to this invention, since the present date and time cannot be delayed carelessly, there is an effect that it is possible to prevent maliciously extending the expiration date.

  In addition, according to the present invention, since an alarm is displayed when the expiration date has expired, the end user can easily recognize that the expiration date has been reached.

  Further, according to the present invention, since a warning is displayed several days before the expiration date, it is possible to take measures before the expiration date.

  In addition, according to the present invention, when the expiration date is expired when the power is turned on, the drive device cannot be operated, so that the user can be urged to pay back the cost.

  Further, according to the present invention, when the expiration date is expired during the automatic operation, the automatic operation of that time is continued, and the automatic starting from the next time is prohibited, so that the workpiece and the machine tool are inadvertently damaged. There is also an effect that the operation of the machine can be limited.

  Further, according to the present invention, it is possible to use the numerical control device again by inputting the release code whose extension is extended again, so that not only the service of the machine tool manufacturer but also the input of the release code by the end user This makes it possible to reduce the service cost of machine tool manufacturers.

Embodiment 1 FIG.
A management method and apparatus for a numerical control device according to the present invention will be described below with reference to FIGS.
FIG. 1 is a block diagram showing an overall configuration of a numerical control device. In the figure, the numerical control device 100 includes a nonvolatile memory, and the serial number 101 and the encryption key 102 of the numerical control device are assigned as serial numbers. Using the input unit 111 and the encryption key input unit 112, the value is input into the numerical controller 100 from the outside in advance and stored in the nonvolatile memory. Further, the order of characters necessary for encryption is also stored in the nonvolatile memory using the encryption key input means 112.
In addition, using the encryption key 122 and the character order having the same setting contents as the encryption key 122 and the character order stored in the non-volatile memory, the expiration date and the numerical control that are the periods in which the numerical control device can be used. The serial number of the device is encrypted outside the numerical control device, and the encrypted code is input as the release code 103 into the numerical control device 100 by the release code input means 113. The input release code 103 is restored to the production number and the expiration date according to the order of the release code analysis means 114, the encryption key 122 and the characters, and the restored production number is stored in the nonvolatile memory inside the numerical controller 100. If it is the same as the stored serial number 121, the restored expiration date 123 is stored in the nonvolatile memory.
Details of these will be described later with reference to FIGS.

  Next, when the numerical controller 100 is turned on, it is checked whether the encryption key 122 is stored in the nonvolatile memory. If the encryption key 122 is stored, the validity flag 125 is turned on. While the valid flag 125 is on, the expiration date check means 116 activated at a certain period obtains the remaining number 126 (the expiration date 123-the current date 124) from the current date 124 and the expiration date 123. At this time, the current date and time 124 is obtained from the real time clock using the current time calculation means 115. When the remaining number of days 126 calculated from the expiration date 123 and the current date 124 becomes, for example, 8 days remaining, the near expiration date flag 127 is turned on, and when the remaining number 126 becomes 0, the expiration date exceeded flag 128 is reached. Turn on.

  Like the expiration date check means 116, the alarm output means 117 that is activated at a certain period checks whether the expiration date exceeded flag 128 is on. If it is on, “Z64 expiration date has passed. Is displayed on the screen of the numerical controller, and when the near-expiration date flag 127 is on, a warning message such as “Z65 Expiration date is approaching 8 days” is displayed. Also, when the remaining number of days 126 becomes 0 when the power is turned on and the expiration date exceeded flag 128 is turned on, the drive control means 119 prohibits the operation of the drive device and turns on the servo preparation OFF flag 129 to complete the servo preparation. Do not turn on the signal. When the expiration date exceeded flag 128 is turned on during automatic operation, if the operation of the driving device is immediately prohibited, the work piece and the tool are affected. This automatic operation continues, and the use of the numerical control device is restricted by not accepting the next start signal.

  In addition, the expiration date 105 stored in the non-volatile memory is updated by inputting again the release code 105 that has confirmed the payment from the user and extended the expiration date into the numerical controller 100, and the expiration date exceeded flag 128. In addition, the near expiration date flag 127 is turned off, and the numerical control device 100 becomes usable again.

  The normal numerical control apparatus 100 can set the current date and time from the screen or the like, but the date update prevention unit 120 delays the date and time from the screen or the like while the valid flag 125 is on. When changing to, "setting error" is displayed and operation is prohibited. When the date and time are changed, the setting can be performed as usual even when the valid flag 125 is on.

  Next, a format example of the release code 103 is shown in FIG. An encryption version identifier is arranged at the head, and the serial number, the encryption key, and the expiration date are arranged in order, and finally the CRC from the manufacturing number to the expiration date is calculated and added. In the release code 103 of the format given in FIG. 2, the release code 103 is generated by encrypting the data excluding the encryption method using, for example, the encryption method shown in FIG.

That is, in FIG. 3, when the character string to be encrypted is “ABC010300”, for example, the encryption key is defined as “1234” and the character order is defined as “TG0EW1QX2HI3PA4ZCVB5N = KY”. When the encryption key is “1234”, for example, when “1” is used in order to “4”, it is determined that the encryption key is used again from “1”.
First, “A” of the first character string in the character string to be encrypted is read, and “A” is converted into “4” using “1” of the encryption key and the order of the characters. That is, “A” of the first character string in the character string to be encrypted is converted to “4” to the right of “1” character of “A” in the character order.
Next, “B” of the second character string in the character string to be encrypted is read, and this “B” is converted to “N” using “2” of the encryption key and the order of the characters. That is, “B” in the second character string in the character string to be encrypted is converted to “N” to the right of “2” characters of “B” in the character order.
Next, among the character strings to be encrypted, “C” of the third character string is read, and “C” is converted into “5” using “3” of the encryption key and the order of the characters. In other words, among the character strings to be encrypted, “C” in the third character string is converted to “5” to the right of “3” characters of “C” in the character order.

Next, among the character strings to be encrypted, “0” of the fourth character string is read, and this “0” is converted to “Q” using “4” of the encryption key and the order of the characters. That is, among the character strings to be encrypted, “0” in the fourth character string is converted to “Q” that is “4” characters to the right of “0” in the character order.
Next, among the character strings to be encrypted, “1” of the fifth character string is read, and this “1” is converted into “Q” using “1” of the encryption key and the order of the characters. That is, among the character strings to be encrypted, “1” in the fifth character string is converted to “Q” that is “1” characters to the right of “1” in the character order. Thereafter, the remaining “0300” is similarly converted, and the character string “ABC010300” to be encrypted is converted into a release code “4N5QQW4QE”.
By inputting the generated release code 103 to the numerical control device 100, the release code analyzing means 114 identifies the encryption method by referring to the encryption method at the beginning of the release code, and the encryption shown in FIG. Restore by doing the reverse of.

  Next, the processing procedure from turning on the valid flag 125 according to the first embodiment to obtaining the remaining number of days 126 from the expiration date 123 and the current date 124 and prohibiting the operation of the driving device will be described with reference to FIGS. This will be described with reference to the flowchart of FIG.

  The flowchart of FIG. 4 is a process performed in the initialization process performed when the power is turned on. First, it is determined whether or not the encryption key 122 is stored in the nonvolatile memory (step S100). If the encryption key 122 is not stored, the process is terminated as it is and a normal initialization process is executed. If the encryption key 122 is stored, after the validity flag 125 is turned on (step S110), it is determined whether or not the expiration date flag 128 is turned on (step S120). If the expiration date exceeded flag 128 is not turned on, the processing is terminated as it is, and a normal initialization process is performed. If the expiration date exceeded flag 128 is on, the drive unit control means 119 executes a process of turning off the servo operation preparation, thereby prohibiting the operation of the drive unit (step S130). The servo preparation OFF flag 129 is turned on so that the preparation is not turned on (step S140), the operation of the drive unit is prohibited, and the process ends. As a result, the operation of the drive unit is prohibited when the expiration date has exceeded when the power is turned on.

  Next, in the flowchart of FIG. 5 showing processing repeatedly executed at regular intervals (for example, every 10 mSec), the expiration date check means 116 determines whether or not the validity flag 125 is on (step S210), and the validity flag 125 If is turned off, the process ends without performing any particular processing. When the valid flag 125 is on, the remaining number of days 126 is calculated (step S220), and when the remaining number of days 126 is 0 or less (step S230), the expiration date exceeded flag 128 is turned on (step S240). When the remaining number of days 126 is less than or equal to the warning date (for example, 8 days) determined to be greater than 0 (step 250), the near-use-limit flag 127 is turned on (step S260). If the remaining number of days 126 is greater than the warning date, the process ends without performing any processing.

  Next, the flowchart of FIG. 6 extracts a part of a normal automatic activation process that is repeatedly executed at regular intervals. At the beginning of the automatic activation process, the automatic activation prohibiting means 118 determines whether or not an activation signal is input (step S300), and if no activation signal is input, terminates without performing any process. If an activation signal is input, it is determined whether automatic operation is currently being performed (step S310). If automatic operation is being performed, the processing is terminated without performing any processing. If it is not in automatic operation, it is determined whether or not the expiration date exceeded flag 128 is turned off (step S320). If the expiration date exceeded flag 128 is turned off, the conventional automatic startup process is performed (step S320). S330). When the expiration date exceeded flag 128 is on, the input of the activation signal can be limited by terminating the process without performing the automatic activation process.

  Further, the flowchart of FIG. 7 extracts a part of a normal alarm output process that is repeatedly executed at regular intervals similarly to the process of FIG. 6. The alarm output means 117 includes an expiration date flag 128. If it is determined that it is turned on (step S400), an alarm message “Z64 expiration date has passed” is displayed (step S410). When the near-limit flag 127 is on (step S420), a warning message “Z65 expiration date is approaching” is displayed (step S430). If both flags are off, the process ends without doing anything and normal error handling is performed. Thus, an alarm message is displayed when the expiration date has expired, and a warning message is displayed when the expiration date is approaching.

  Further, the flowchart of FIG. 8 is a flowchart showing the process of the date update prevention means 120 that is repeatedly executed at regular intervals as in the process of FIG. 6. When there is no date update request, the process ends and the date When there is an update request (step 500), the current date / time is acquired (step 510), and the date / time to be changed next is acquired (step 520). It is determined whether or not the date / time to be changed next is before the current date / time (step 530). If the date / time to be changed is before the current date / time, the date changing process is executed. (Step 560). If the date / time to be changed is later than the current date / time, it is determined whether the credit system validity flag is ON (step 540). If the credit system validity flag is ON, the date If a change impossible error message is displayed and the credit system validity flag is not ON, date change processing is executed (step 560).

  As described above, according to the first embodiment, when there is no predetermined payment for a user who repays the remaining cost by installment payment, the use of the numerical control device is restricted when the lease term has expired. Therefore, there is an effect that reliable cost recovery can be performed.

  Further, according to the first embodiment, by using electronic data such as an encryption key and a release code, there is an effect that an increase in hardware cost can be suppressed because no additional hardware is required.

  In addition, according to the first embodiment, by encrypting both the manufacturing number and the expiration date and using it as a release code, there is an effect that it is possible to prevent adaptation to other machine tools.

  Moreover, according to this Embodiment 1, since the present date cannot be delayed carelessly, there is an effect that it is possible to prevent maliciously extending the expiration date.

  Further, according to the first embodiment, since an alarm is displayed when the expiration date has expired, the end user can easily recognize that the expiration date has been reached.

  Further, according to the first embodiment, since a warning is displayed several days before the expiration date, it is possible to take measures before the expiration date.

  In addition, according to the first embodiment, when the expiration date is expired when the power is turned on, the drive device cannot be operated, so that the user can be urged to pay back the expenses.

  Further, according to the first embodiment, when the expiration date is expired during the automatic operation, the automatic operation at that time is continued, and automatic starting from the next time is prohibited. There is an effect that the operation of the machine can be limited without damaging the machine.

  Further, according to the first embodiment, it is possible to use the numerical control device again by inputting the release code whose extension is extended again, so that not only the service of the machine tool manufacturer but also the release by the end user This makes it possible to enter codes and reduce the service costs of machine tool manufacturers.

Embodiment 2. FIG.
In the first embodiment, the expiration date 103 stored in the non-volatile memory is updated by inputting again the release code 103 that confirms the payment from the user and extends the expiration date into the numerical controller 100. Then, the expiration date exceeded flag 128 and the near expiration date flag 127 are turned off, and the numerical control device 100 becomes usable again. As a method of inputting the release code 103 into the numerical control device 100 again, for example, You may comprise as follows.
That is, the numerical control device 100 is connected to the Internet, and the seller or the leasing company joins the Internet bank and prepares the release code 103 in advance. The release code 103 previously sent may be sent through the Internet, and the expiration date 123 may be updated.

Embodiment 3 FIG.
In the first embodiment, the production number is used to specify the numerical control device to be managed. However, if the numerical control device to be managed is specified, numbers and symbols other than the production number are used. May be.

  The method and apparatus for managing a numerical control device according to the present invention are suitable for use in management of a numerical control device in a business form or lease form in which expenses are recovered by installment payment.

It is a block diagram which shows the example of 1 structure of the numerical control apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining the format of the cancellation | release code which concerns on Embodiment 1 of this invention. It is a figure explaining the encryption system which concerns on Embodiment 1 of this invention. It is a flowchart which shows the initialization process procedure which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the expiration date check means performed with a fixed period which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the automatic starting prohibition means performed with a fixed period which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the alarm output means performed with the fixed period which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the date update prevention means performed with a fixed period which concerns on Embodiment 1 of this invention.

  DESCRIPTION OF SYMBOLS 100 Numerical control apparatus, 101 Production number, 102 Encryption key, 103 Release code, 111 Production number input means, 112 Encryption key input means, 113 Release code input means, 114 Release code analysis means, 115 Current time calculation means, 116 Expiration date check means, 117 alarm output means, 118 automatic start prohibition means, 119 drive control means, 120 date update prevention means, 121 serial number, 122 encryption key (character order), 123 expiration date, 124 current date and time , 125 valid flag, 126 remaining days, 127 near expiration date flag, 128 expiration date flag, 128 servo ready OFF flag.

Claims (14)

A step of inputting an encryption key for encrypting the expiration date in the numerical controller, enter a release code that is encrypted with the numerical control device outside the expiration using said encryption key in the numerical control device A stage in which the cancellation code input in the numerical control device is restored to the expiration date by using the encryption key input in advance, the stage in which the expiration date is compared with the current date and time, and the expiration date is obtained by this comparison. If it is determined that the numerical control device has expired, the use of the numerical control device is restricted, and if the expiration date of the numerical control device expires during automatic operation, the drive device is immediately rendered inoperable. And a step of prohibiting the next automatic activation, instead of a numerical control device management method. A step of inputting the encrypted key to encrypt and numbers or symbols is provided to identify a numerical control device that manages the expiration date in the numerical controller, and expiration using said encryption key a step of inputting a release code that is encrypted with the numerical control device outside the provided number or symbols to identify the numerical controller which manages in a numerical controller, the release code entered in the numerical control device, The encryption key is used to restore the expiration date and the number or symbol provided to identify the numerical control device to be managed, and the number or symbol provided to specify the restored managed numerical control device is If they are the same as the numerals or symbols are provided to identify a numerical control device for managing set in the numerical control device, sets the expiration date in the numerical control device Both if they are not the same, the steps do not set the expiration date in the numerical controller, and comparing the expiration date with the current date and time, when it is determined that the expiration date has expired by this comparison, In the stage of restricting the use of the numerical control device and when the expiration date of use of the numerical control device expires during automatic operation, the next automatic start is prohibited instead of immediately disabling the drive device. A management method for a numerical control device , characterized by comprising steps . 3. When the expiration date valid flag is on, only the operation for correcting the current date and time is permitted, and the operation for correcting the date and time is prohibited in the delaying direction. The management method of the numerical control apparatus described in 1. 4. The numerical control device management method according to claim 1, wherein an alarm is output when it is determined that the expiration date has expired. 5. The numerical control device management method according to claim 1, wherein when the expiration date is about to expire in a few days, a warning is output that the expiration date will expire in a few days. 6. The management of a numerical controller according to claim 1, wherein if the expiration date has expired when the numerical controller is turned on, the drive device is rendered inoperable. Method. When it is determined that the expiration date has expired, the numerical controller can be used again by inputting a release code in which the future date and time are encrypted from the current date and time. management method for a numerical control apparatus according to any one of claim 1 to claim 7. An encryption key input means for inputting an encryption key for encrypting the expiration date in the numerical controller, a numerical control of the release code that is encrypted with the numerical control device outside the expiration using said encryption key A cancellation code input means for inputting into the apparatus, a cancellation code analyzing means for restoring the cancellation code input in the numerical control apparatus to the expiration date by the encryption key input in advance, the expiration date and the current date and time Expiration date checking means to be compared, and means for restricting the use of the numerical control device when the expiration date is judged to have expired by this expiration date checking means, and the expiration date expired during the automatic operation of the numerical control device. In this case, the numerical control device has an automatic start prohibiting means for prohibiting the next automatic start, instead of immediately setting the drive device in an inoperable state . An encryption key input means for inputting an encryption key for encrypting the number or symbol is provided to identify a numerical control device that manages the expiration date in the numerical controller, using said encryption key A release code input means for inputting a release code obtained by encrypting a number or symbol provided for identifying a numerical control device to be managed and a numerical control device outside the numerical control device into the numerical control device, and in the numerical control device. The input cancellation code is restored to the expiration date and the number or symbol provided to specify the numerical control device to be managed by the encryption key, and provided to specify the restored numerical control device to be managed numbers or symbols, in the case same as the numerals or symbols are provided to identify a numerical control device for managing set in advance in the numerical control apparatus includes expiration date And sets the numerical control device, if not the same, the release code analyzing means do not set the expiration date in the numerical controller, a use time limit checking means for comparing the expiration date with the current date, the use-by date When it is determined by the checking means that the expiration date has expired, there is no means for restricting the use of the numerical control device , and when the expiration date has expired during the automatic operation of the numerical control device, the drive device cannot be operated immediately. A management device for a numerical control device , characterized by having automatic start prohibiting means for prohibiting next automatic start, instead of making it possible . When the expiration date valid flag is on, there is provided a date update preventing means for permitting only an operation for correcting the current date and time to advance and prohibiting an operation for correcting the date and time in a delayed direction. The management device of the numerical control device according to claim 8 or 9 . Management device of the numerical controller according to any one of claims 8 to claim 10, characterized in that a alarm output means for outputting an alarm when it is determined that the expiration date has expired. The numerical control according to any one of claims 8 to 11 , further comprising an alarm output means for outputting a warning that the expiration date will expire in a few days when the expiration date will expire in a few days. Device management device. 13. The drive unit control means for making the drive device in an inoperable state when the expiration date has expired when the numerical controller is turned on is provided in any one of claims 8 to 12. Management device for the numerical control device described. When it is determined by the expiration date check means that the expiration date has expired, the numerical controller can be used again by inputting a release code in which the future date and time are encrypted from the current date and time. The numerical control device management apparatus according to any one of claims 8 to 13 , wherein the management apparatus is a numerical control device.

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