JPH086624A - Numerical controller equipped with local variable display function - Google Patents

Abstract

PURPOSE:To facilitate operation confirming operation for an NC program using local variables which are erased after the execution of the NC program ends. CONSTITUTION:A display local variable storage part 13 stores the names and contents of local variables, which are generated when defined in a subprogram and erased after the subprogram ends, among variables used in the NC program consisting of a main program and the subprogram, and the name of the subprogram. A display control part 11 controls a display of the local variable names, variable contents, and subprogram name stored in the display local variable storage part 13.

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 display function of local variables used in an NC program.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing an example of a conventional numerical controller having a local variable display function. The program storage unit 1 stores a main program and a sub program. At the request of the operator, the program selection unit 2 selects the corresponding program from the main program and the sub-program stored in the program storage unit 1 and stores it in the operation buffer 3 which is the NC program operation area. When the operator gives an operation command, the part program analysis unit 4 reads the main program or the subprogram stored in the operation buffer 3 block by block and analyzes the block to generate analysis data. When a local variable is defined in the subprogram, the part program analysis unit 4 stores the local variable name and the variable content in the local variable storage unit 6, and the local variable is referred to in the subprogram. The part program analysis unit 4 reads the corresponding local variable name and variable contents from the local variable names and variable contents stored in the local variable storage unit 6 and generates analysis data. The execution block data creation unit 5 creates execution block data based on the analysis data generated by the part program analysis unit 4. The display control unit 11 reads out the local variable name and the variable contents stored in the local variable storage unit 6 and displays them on the display device 12. The local variable name and the variable contents stored in the local variable storage unit 6 are erased at the time of resetting or execution of the subprogram. The function generation unit 7 generates a function based on the execution block data created by the execution block data creation unit 5, and outputs the calculated value to the servo control unit 8. The servo controller 8 drives the motor 9 based on the calculated value output from the function generator 7 together with the feedback of the current value data of the detector 10.

[0003]

In the conventional numerical control device having the local variable display function described above, the local variables are stored and displayed only when they are defined in the subprogram, but the execution of the subprogram ends. Then, since the storage of the local variables is erased, the contents of the local variables cannot be displayed on the display device after the subprogram execution is completed.
Therefore, there is a problem that it is difficult to confirm the operation of the NC program using the local variables after the subprogram execution is completed. The present invention has been made from the above-described circumstances, and an object of the present invention is to enable the contents of a local variable to be retained and displayed even if the local variable is erased by the end of execution of a subprogram so that the local variable can be stored. It is an object of the present invention to provide a numerical controller having a local variable display function for facilitating the operation confirmation work of the NC program used.

[0004]

According to the present invention, among variables used in an NC program composed of a main program and a subprogram, the variables are generated when they are defined in the subprogram, and the subprogram is terminated. The present invention relates to a numerical control device having a function of displaying a local variable name and a variable content that are deleted when the local variable name is defined in the subprogram. A display local variable storage unit for storing variable contents and a subprogram name; and a display control unit for controlling display of the local variable name, variable contents and subprogram name stored in the display local variable storage unit. It is achieved by having.

[0005]

In the present invention, since the local variable name, the variable contents and the subprogram name are stored in another display local variable storage unit, another main program can be executed even after the execution of the subprogram is completed. Until the execution is started, the local variable name, the variable content and the subprogram name can be held, and the local variable name and the variable content can be displayed on the display device.

[0006]

1 is a block diagram showing an embodiment of a numerical controller having a local variable display function of the present invention.
The same components as those in FIG. 4 are designated by the same reference numerals. The program storage unit 1 stores a main program and a sub program.
At the request of the operator, the program selection unit 2 selects the corresponding program from the main program and the sub-program stored in the program storage unit 1 and stores it in the operation buffer 3 which is the NC program operation area. When the operator gives an operation command, the part program analysis unit 4 reads the main program or the subprogram stored in the operation buffer 3 block by block and analyzes the block to generate analysis data. If local variables are defined in the subprogram, the part program analysis unit 4
Shows the local variable name and variable contents in the local variable storage unit 6
In addition, the local variable name, the variable contents, and the subprogram name are stored in the display local variable conversion storage unit 13. When a local variable is referred to in the subprogram, the part program analysis unit 4 reads out and analyzes the corresponding local variable name and variable content among the local variable name and variable content stored in the local variable storage unit 6. Generate data. The execution block data creation unit 5 creates execution block data based on the analysis data generated by the part program analysis unit 4. The display control unit 11 ′ reads out the local variable name and the variable contents stored in the local variable storage unit 6, displays them on the display device 12, and displays the local variable name stored in the display local variable storage unit 13. The variable contents and the subprogram name are read out and displayed on the display device 12. The local variable name and the variable contents stored in the local variable storage unit 6 are erased at the time of resetting or execution of the subprogram. The local variable name, the variable contents, and the subprogram name stored in the display local variable storage unit 13 are erased at the start of execution of the next main program. The function generation unit 7 generates a function based on the execution block data created by the execution block data creation unit 5, and outputs the calculated value to the servo control unit 8. The servo controller 8 drives the motor 9 based on the calculated value output from the function generator 7 together with the feedback of the current value data of the detector 10.

FIG. 2 is an explanatory diagram showing the hierarchy of the local variable display unit 13 for displaying local variables used in the apparatus of the present invention. The display local variable storage unit 13 includes a subprogram name, a local variable name, and local variable analysis data, and is stored in subprogram units. First, the subprogram name is stored, then the local variable name and the analysis data of the local variable are stored, and then another local variable name and the analysis data of the local variable are stored. When another subprogram is executed, the subprogram name is similarly stored, and then the local variable name and the analysis data of the local variable are stored.

FIG. 3 is a flow chart showing the operation of the device of the present invention. At the start of execution of the main program, all the subprogram names, local variable names, and local variable data stored in the display local variable storage unit 13 are erased (step S1), and the NC program being executed is read block by block. Put out (step S2). Step S2
It is determined whether the data read in step S1 is the end code M02 or M30 of the main program (step S3). If the end code is the end code, the process proceeds to the end. If not, the process proceeds to step S4. The data read in step S2 is the RTS which is the end code of the subprogram.
It is determined whether or not it is a command (step S4). If it is an RTS command, the process proceeds to step S5, and if it is not the RTS command, the process proceeds to step S6. The local variable name used in the subprogram that has finished executing from the local variable storage unit 6,
Erase all local variable data (step S5),
Return to step S2. Analysis data is generated based on the data read in step S2, and if the local variable is referenced, the corresponding local variable is selected from the local variable name and the local variable data stored in the local variable storage unit 6. The name and local variable data are read out to generate analysis data (step S6). In the analysis data generated in step S6, it is determined whether or not a local variable is defined (step S7). If it is defined, the process proceeds to step S8, and if it is not defined, step S8.
Proceed to 13. It is searched whether or not the name of the currently executed subprogram is stored in the display local variable storage unit 13 (step S8), and if not stored, step S9.
If it is stored, the process proceeds to step S10. Local variable storage unit 13 for displaying the name of the subprogram being executed
(Step S9). The local variable name defined in step S7 is the display local variable storage unit 13
Is searched (step S10),
If it is stored, the process proceeds to step S11, and if it is not stored, the process proceeds to step S12. Of the local variable names stored in the display local variable storage unit 13, the variable contents corresponding to the corresponding local variable name are updated (step S11), and the process proceeds to step S13. The local variable name and the variable contents are stored in the display local variable storage unit 13 (step S12). Execution block data is created based on the analysis data generated in step S6 (step S13), the function generator 7 generates a function (step S14), and the process returns to step S2.

[0009]

As described above, according to the numerical controller having the local variable display function of the present invention, even if the defined local variable is deleted by the end of the execution of the subprogram, the next main program is executed. Since the contents of the local variables can be retained and displayed until the start of execution, it is possible to find a program error related to the local variables in the operation confirmation work of the NC program using the local variables.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a numerical controller having a local variable display function of the present invention.

FIG. 2 is an explanatory diagram showing an example of a hierarchy of a display local variable storage unit for local variables used in the device of the present invention.

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

FIG. 4 is a block diagram showing an example of a conventional numerical control device having a local variable display function.

[Explanation of symbols]

 13 Local variable storage for display

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G05B 23/02 301 L 7531-3H

Claims (2)

[Claims] 1. A local variable name of a variable used in an NC program composed of a main program and a subprogram, which is created when the subprogram is defined and is deleted when the subprogram ends, and In a numerical controller equipped with a function to display the contents of variables,
When the local variable is defined in the subprogram, a local variable storage unit for storing the local variable name, variable content and subprogram name, and the local variable stored in the local display variable storage unit A numerical control device having a local variable display function, which is provided with a display control unit for controlling display of names, variable contents and subprogram names. 2. The local according to claim 1, further comprising means for erasing the local variable name, the variable content and the subprogram name stored in the display local variable storage section at the start of execution of the main program. Numerical control device with variable display function.