JPH07271414A - Numerical controller - Google Patents

Abstract

PURPOSE:To provide the numerical controller with which interlock condition data can be easily set and changed and the set and changed interlock condition data can be returned to the original data. CONSTITUTION:This numerical controller is provided with an interlock condition changing and setting part 8 for setting and changing interlock conditions, interlock condition expression converting part 7 for converting or inversely converting data concerning the interlock conditions to any formula, interlock condition saving part 9 and interlock condition returning part 12 for saving/ returning the interlock condition data between an interlock condition data part 2 and an interlock condition storage part 10. Further, this device is equipped with a correction complete signal output part 11 for indicating the recovery of interlock conditions from the outside and a predictive correction time setting part 13 for setting automatic recovery time to automatically recover the interlock conditions and the interlock conditions are not only changed but also recovered to the interlock conditions before the change corresponding to any instruction from the outside or automatically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller capable of changing and setting interlock conditions of various peripheral devices constituting a machine tool.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a conventional numerical control device. The conventional numerical control device has a control program unit 1 for controlling the operation of a peripheral device 6 constituting a machine tool.
And an interlock condition data section 2 for storing interlock condition data for the operation of the peripheral device 6, and a data display unit (hereinafter referred to as CRT) of a numerical controller for controlling a machine tool. It has an interlock condition display unit 3 to be displayed and a drive unit 5 to output an operation command to the peripheral device 6.

In this conventional numerical controller, the control program section 1 stores interlock condition data for the operation of the peripheral device 6 in the interlock condition data section 2 in advance. The interlock condition display section 3 is a CRT.
By displaying the data of the interlock condition data section 2 on the screen, it is possible for the operator or the like to confirm the value.
Each peripheral device 6 operates according to an operation command from the drive unit 5. When operating, each peripheral device 6 outputs position information and the like as a status signal. The interlock condition determination unit 4 receives the status signal from the peripheral device 6 and determines whether the interlock condition stored in the interlock condition data unit 2 is satisfied. If it is satisfied, a command to execute the operation is output to the drive unit 5. The drive unit 5 drives the peripheral device 6 according to a command from the interlock condition determination unit 4.

[0004]

However, in the past, since the interlock condition data was only displayed by the interlock condition display section, it was impossible to change the interlock condition data.

Even if the interlock condition data can be changed, it is a display in an electric drawing format, and therefore, actually changing the interlock condition data requires specialized knowledge, so that the operator can easily change the data. There was a problem that the interlock condition data could not be changed. As a result, when the peripheral device breaks down and the machine tool becomes inoperable, by changing the interlock condition data, even if the machine tool temporarily operates, a skilled engineer can operate the peripheral device. There was a problem that the machine tool had to be stopped until it was repaired.

Further, in the case where the skilled engineer temporarily changes the interlock condition data so that the machine tool can be operated, when the repair of the peripheral device is completed, the experienced engineer temporarily changes the interlock condition. There was a risk of forgetting to restore the data or setting it to an incorrect value.

It is an object of the present invention to provide a numerical controller capable of easily changing the setting of the interlock condition data even if there is no specialized knowledge when the peripheral device fails.

Another object of the present invention is to provide a numerical controller capable of restoring the interlock condition data even when the peripheral device is restored by changing the interlock condition data.

[0009]

To achieve the above object, the invention according to claim 1 relates to the interlock condition in a numerical controller for operating various peripheral devices constituting a machine tool according to the interlock condition. Conditional expression conversion means for converting data into a mathematical expression, means for displaying the interlock conditional expression converted into the mathematical expression, data setting means for setting the interlock condition with a mathematical expression, and the interlock condition with a mathematical expression Condition setting changing means for changing, data conversion means for inversely converting the interlock condition whose setting is changed by a mathematical expression into the interlock condition data, and condition storage means for storing the inversely converted interlock condition data, Condition for temporarily saving and storing the interlock condition before setting change stored in the condition storage means Time storage means, data save / restore means for saving / restoring the interlock condition between the data storage means and the condition temporary storage means, and condition restoration instructing means for externally instructing restoration of the interlock condition And the interlock condition can be set or changed by a mathematical expression, the peripheral device can be operated under the changed interlock condition, and an instruction to restore the interlock condition is given from the outside. .

According to a second aspect of the present invention, in the numerical controller according to the first aspect, a reset time setting means for setting an automatic reset time for resetting the interlock condition, and a timer for starting counting from a predetermined time. And, when the time measured by the timer reaches the automatic reset time, the interlock condition is automatically reset.

[0011]

According to the present invention having the above construction, the interlock condition can be set from the outside by the data setting means.

Further, the data setting means can externally set the interlock condition by a mathematical expression.

When changing the interlock condition using the condition setting changing means, the data saving / restoring means
The interlock condition stored in the condition storage means is temporarily saved in the condition temporary storage means. As a result, the peripheral device can be operated according to the changed interlock condition.

This interlock condition can be easily changed by designating it in a simple format such as a mathematical expression.

On the other hand, the data save / restore means can operate the peripheral device according to the original interlock condition by returning the interlock condition temporarily saved in the condition temporary storage means to the condition storage means.

Further, it is possible to instruct to restore the condition based on the interlock condition from the outside by the condition return instructing means.

Further, by using a timer, the interlock condition can be automatically restored when the time measured by the timer reaches the automatic restoration time.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The same elements as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 is a block diagram of an embodiment of the present invention. The details of this embodiment will be described with reference to this block diagram. This numerical control device has a data setting means for only setting the interlock condition, or a condition setting changing means for setting and changing the interlock condition, and has an interlock condition change setting part 8 for setting and changing the interlock condition. Is characterized by. Thereby, the interlock condition can be set from the outside. The present apparatus is also a conditional expression conversion means for converting the interlock condition data stored in the interlock condition data section 2 which is the condition storage means into a mathematical expression and outputting it to the interlock condition display section 3, and the mathematical expression. Has an interlock conditional expression conversion unit 7 as a data conversion means for converting the data into data.

FIG. 2 is an explanatory diagram showing an example of an interlock conditional expression used in this embodiment. The interlock condition is expressed by a 6-digit numerical value, which is combined to form an interlock condition expression. The sixth digit indicates whether it is affirmative or negative, and is 0 for affirmative and 1 for negative. The fifth digit represents the type of interlock condition, and is 1 if it is an input signal to NC.
The output signal from the NC is represented by 2, and the condition generated inside the NC is represented by 3. The 4th, 3rd and 2nd digits indicate the address position of the interlock condition data.
Expressed as a digit value. The first digit represents the bit position of the interlock condition data and is represented by a numerical value from 0 to 7. Numerical expressions are indicated by * in the case of AND condition, and by + in the case of OR condition. The interlock condition data of the peripheral device is used to determine the interlock condition of the operation of each peripheral device.

When the interlock condition change setting unit 8 outputs the interlock conditional expression expressed by the above mathematical expression to the interlock conditional expression conversion unit 7, the interlock conditional expression conversion unit 7 interlocks the interlock conditional expression. The new interlock condition data is stored in the interlock condition data section 2 after being inversely converted into the condition data.

As described above, in this embodiment, the interlock condition can be changed from the interlock condition change setting unit 8 in the form of the above-mentioned conditional expression, so that even an unskilled engineer can easily set the interlock condition. Can be changed.

Further, in this embodiment, data saving for saving / restoring the data relating to the interlock condition between the interlock condition data unit 2 which is the data storage unit and the interlock condition storage unit 10 which is the condition temporary storage unit. / It is characterized by having the interlock condition saving unit 9 and the interlock condition returning unit 12 as the restoring means.
When the interlock condition saving unit 9 inputs a save command from the interlock condition change setting unit 8 when an interlock condition changing operation is performed, the interlock condition data stored in the interlock condition data unit 2 is stored. Is temporarily saved in the interlock condition storage unit 10 as the old interlock condition data before the setting change. On the contrary, the interlock condition returning unit 12 restores the old interlock condition data temporarily saved in the interlock condition storage unit 10 to the interlock condition data unit 2 when receiving an instruction described later. As a result, not only the peripheral device can be operated according to the changed interlock condition, but also the peripheral device can be operated according to the original interlock condition by returning the saved data to the old interlock condition before the change. .

Further, the numerical controller according to the present embodiment is characterized in that it has a repair completion signal output section 11 as condition restoration instruction means in order to restore the interlock condition temporarily saved as described above. After the peripheral device 6 is repaired by changing the interlock condition, the repair completion signal output unit 11 outputs a repair completion signal, so that the interlock condition can be restored from the outside.

Further, in the numerical controller according to the present embodiment, the estimated repair time setting unit 1 as the reset time setting means for setting the automatic recovery time for recovering the interlock condition.
3 and a time counter 16 as a timer that starts counting from a predetermined time. When the estimated repair time is set as the automatic recovery time, the estimated repair time setting unit 13 stores the estimated repair time in the estimated repair time storage unit 14 and outputs a count command to the time counter 16. The time counter 16 clears the time counter and then starts counting time. Estimated repair time comparison unit 15
Compares the time counted by the time counter 16 with the estimated repair time stored in the estimated repair time storage unit 14, and when the cumulative time counted by the time counter 16 exceeds the estimated repair time, A command for returning the old interlock condition data to the original is output to the interlock condition returning unit 12. The interlock condition returning unit 12 restores and stores the old interlock condition data saved in the interlock condition storage unit 10 in the interlock condition data unit 2. In this way, the interlock condition can be automatically restored.

The interlock condition judging unit 4 inputs the status signal from the peripheral device 6 according to the interlock condition data stored in the interlock condition data unit 2 and judges whether the interlock condition for the operation is satisfied. If it is satisfied, a command to execute the operation is output to the drive unit 5. The drive unit 5 drives the peripheral device 6 according to a command from the interlock condition determination unit 4.

FIG. 3 is a flow chart showing the operation of this embodiment. This operation is a case where the operator modifies the interlock conditional expression, repairs the peripheral device 6, and restores the interlock conditional expression to the original value after the repair.

In step S1, O in step S4
Check the interlock conditional expression change flag that is
If it is FF, it proceeds to step S2, and if it is ON, it proceeds to step S7.

In step S2, it is confirmed whether or not the operator has changed the interlock condition expression in the interlock condition change setting unit 8, and if it is changed, the process proceeds to step S3. If not, the process proceeds to step S7. .

In step S3, the interlock condition expression stored in the interlock condition data part 2 is saved in the interlock condition storage part 10, and the step S3 is executed.
The new interlock condition expression changed in 2 is stored in the interlock condition data section 2.

In step S4, the interlock condition expression change flag is turned on because the interlock condition data section 2 is changed with the new interlock condition expression.

In step S 5, the estimated repair time set by the estimated repair time setting unit 13 is stored in the estimated repair time storage unit 14.

In step S6, the time counter is cleared to start counting the time.

In step S7, an operation command from NC is accepted.

In step S8, the interlock condition determining section 4 searches for an interlock conditional expression corresponding to the operation command accepted in step S7, and confirms whether the interlock condition is satisfied according to the interlock conditional expression. If the conditions are satisfied, the process proceeds to step S9.

In step S9, the operation corresponding to the operation command accepted in step S7 is executed.

In step S10, if the interlock condition expression change flag is ON, the process proceeds to step S11. If it is OFF, it means that the interlock condition data section 2 is not changed by the new interlock condition expression. Go to.

In step S11, it is determined whether or not the restoration completion signal is turned on by the operator's operation. If the restoration completion signal is turned on, it is determined that there is an instruction to restore the saved data from the outside, and the process proceeds to step S13. Go ahead,
If it is OFF, it is determined that there is no instruction from the outside, and the process proceeds to step S12.

In step S12, the estimated repair time comparing unit 15 compares the estimated repair time set in step S5 with the time counter started in step S6. If the estimated time is less than the estimated repair time, step S1 Go to step S1 if the estimated repair time is exceeded.
Go to 3.

In step S13, the interlock condition expression saved in the interlock condition storage unit 10 in step S3 is returned to the interlock condition data unit 2. As a result, the interlock condition is automatically restored.

In step S14, the interlock conditional expression change flag is turned off.

[0042]

As described above, according to the numerical control device of the present invention, the provision of the data setting means allows the setting of the interlock condition to be changed from the outside, and the interlock condition can be expressed in the form of a mathematical expression. Since it can be expressed by, even a non-expert engineer can easily change the setting.

Further, by providing the data saving / restoring means and the like, not only the interlock condition can be changed but also the interlock condition before the setting change can be restored. As a result, even if the machine tool fails, the machine tool can be temporarily used without waiting for the repair, so that it is possible to suppress a decrease in the operating rate of the machine tool.

Further, by providing the condition restoration instructing means, it is possible to give an instruction from outside to restore based on the interlock condition.

Further, since the timer is used,
The interlock condition can be automatically restored. As a result, even if the operation to restore the original interlock condition is mistakenly forgotten when the peripheral device is restored, the interlock condition is automatically restored when the automatic reset time is reached by presetting the automatic reset time. It becomes possible. Also,
It is possible to eliminate the need to change the restoration of the interlock condition during restoration.

This has the effect of preventing the restart of the machine tool in an unsafe state.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of an interlock conditional expression used in the present invention.

FIG. 3 is a flowchart showing the operation of the present invention.

FIG. 4 is a block diagram showing a conventional technique.

[Explanation of symbols]

 1 Control Program Section 2 Interlock Condition Data Section 3 Interlock Condition Display Section 4 Interlock Condition Judgment Section 5 Drive Section 6 Peripheral Device 7 Interlock Conditional Expression Conversion Section 8 Interlock Condition Change Setting Section 9 Interlock Condition Saving Section 10 Inter Lock condition storage unit 11 Repair completion signal output unit 12 Interlock condition return unit 13 Repair estimated time setting unit 14 Repair estimated time storage unit 15 Repair estimated time comparison unit 16 Time counter

Claims (2)

[Claims] 1. A numerical controller for operating various peripheral devices constituting a machine tool in accordance with an interlock condition, conditional expression conversion means for converting data relating to the interlock condition into a mathematical expression, and interlock converted into the mathematical expression. Means for displaying a conditional expression, data setting means for setting the interlock condition by a mathematical expression, condition setting changing means for changing the setting of the interlock condition by a mathematical expression, and the interlock condition changed by a mathematical expression for the interlock condition Data conversion means for converting back to interlock condition data, condition storage means for storing the reverse-converted interlock condition data, and temporary saving of the interlock condition before setting change stored in the condition storage means A condition temporary storage means for storing, the data storage means, and the condition temporary storage means Data is saved / restored the interlock condition between retracted /
A resetting means and a condition resetting instruction means for instructing a return of the interlock condition from the outside are provided, and the interlock condition can be set or changed by an external formula, and the peripheral device is operated under the changed interlock condition. A numerical control device, which can be caused to perform an instruction to restore the interlock condition from the outside. 2. The numerical control device according to claim 1, further comprising a reset time setting unit that sets an automatic reset time for resetting the interlock condition, and a timer that starts counting from a predetermined time. A numerical controller, wherein the interlock condition is automatically reset when the time measured by a timer reaches the automatic reset time.