JPH06110525A - Numerical controller - Google Patents

Abstract

PURPOSE:To completely perform the debugging work of an NC program with single block execution by effectively utilizing a structured description format so as to process the condition judge part of a conditioned control sentence and the processing part of a branch destination as different blocks. CONSTITUTION:The control condition discrimination part of the conditioned control sentence and the processing part of the branch destination are defined as different blocks. For example, the block of an IF sentence is partitioned like a figure and when one block is executed from a pointer (1) and a 'condition expression' is true, single block stop is performed by a pointer (2) or when it is false, single block stop is performed by a pointer (3). In this case, both of an NC sentence and a macro sentence are available for sentences 1 and 2. Since the condition discrimination and the machine operation are not executed in one block, the program debugging of a structured NC language is enabled on the same operation environment as the conventional single block execution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device, and more particularly to a numerical control device capable of adopting a structured program description format.

[0002]

2. Description of the Related Art The execution format of the NC program language on a CNC device has a continuous operation format in which it is continuously executed without stopping until the program end, and a single block execution format in which it is stopped every block execution. Single block execution is often used when debugging NC programs. Blocks include NC statement blocks that describe machine operations and macro statement blocks that control the flow of programs.
Separated by the B code. A conventional NC device of this type executes a sentence delimited by EOB code as one block.

[0003]

By the way, the program description format of the macro statement varies depending on the CNC device. For example, in the unstructured program description format as shown in FIG. 1, since the macro statement and the NC statement are separated, no problem occurs. However, when the structured program description format currently proposed by ISO is adopted, in the conventional block control method, a macro statement and an NC statement can be mixed in one block, so that an operator is required to execute the block. Had a problem that the next machine operation could not be clearly determined. For example, in the case of the structured program description format shown in FIG. 2, since the operator cannot evaluate the conditional expression on the spot at the time of executing the block, it is impossible to judge whether or not the axis movement is performed. Therefore, there is a problem that the worker is anxious. The present invention has been made to solve the above problems,
The purpose is to utilize the structured description format of the NC language and execute N by single block execution.
It is an object of the present invention to provide a numerical controller capable of safely performing a debugging operation of a C program.

[0004]

In order to achieve the above object, in the present invention, in a numerical controller for controlling a controlled device by reading and executing a numerical control program block by block, the read numerical value is controlled. Determination means for determining whether the content of the control program is a conditional statement, content determination means for determining the content of the conditional statement when the determination means determines that the content is a conditional statement, and the result of the content determination means There is provided a numerical controller provided with an operation stopping means for stopping the operation before the next instruction executed according to the above, and a trigger signal output means for giving a trigger signal for instructing the execution of the next instruction.

[0005]

In the numerical controller configured as described above, when the program is read block by block, the determining means determines whether or not the read block is a conditional statement. The content determining means determines the content of this conditional statement, and the operation stopping means stops the operation before the next instruction according to the result of the content determining means, and operates when the trigger signal is output from the trigger signal output means. To resume.

[0006]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 4, 10 is an angular slide grinder,
20 is a numerical control device. The grinder 10 includes a grindstone base 11 that supports the grindstone G and a work table 13 on which a work W is placed. The grindstone 11 and the workpiece table 13 are moved by servomotors 12 and 14 which are rotationally driven by drive circuits 16 and 17, respectively. Absolute encoders 18 and 19 are attached to the servomotors 12 and 14, respectively.

The numerical controller 20 is mainly a CPU 2
1, a RAM 24, a ROM 25, a real time clock (hereinafter referred to as “RT
It is abbreviated as "C". ) 22, a pulse generation circuit 23, and interfaces 26, 27, 29, and the command pulse sent from the pulse generation circuit 23 is the drive circuit 1
6 and 17 are supplied. On the other hand, a display control circuit 37 is connected to the interface 26, and a CRT display device 38 is connected to the display control circuit 37. Further, the interface 27 is provided with a bubble cassette input / output device 34 storing NC data constituting an NC program, a trigger switch 36a for outputting various data and a trigger signal for instructing the CPU 21 to restart the operation.
A keyboard 36 equipped with is connected.

FIG. 5 shows the CPU 2 when executing a single block.
It is a flowchart which shows the process of 1. When the operation is started, the counter I is set to 1 in step 101, the operation is stopped in step 102, and the start switch is pressed in step 103 to wait for an operation command. When the operation command is issued, the process proceeds to step 104 to read the I-th data block. In step 105, it is checked whether or not the command is the data end, and if it is the data end, the process proceeds to step 106 to end the processing. Generally, it is not the data end, so the routine proceeds to step 107.

In step 107, it is checked whether the read instruction is a conditional statement. Conditional statements are IF statements and WHILE
A sentence, a FOR sentence, a CASE sentence, etc. If it is not a conditional statement, the process proceeds to step 108, the next statement is executed, and step 117
Then, the counter I is incremented. If it is a conditional sentence, the process proceeds to step 109, and it is checked in step 110 whether the condition is satisfied. Step 111 if satisfied
Proceed to and check if there is a continuation sentence for satisfaction. If there is a succeeding sentence, the process proceeds to step 112, and the process is stopped before the execution sentence at the time of satisfaction. Then, in step 115, the start switch is pressed again and the operation command is waited for. If there is an operation command, the process proceeds to step 116, the next sentence is executed and the process proceeds to step 117, and the counter I is incremented to step 1
Return to 02. If there is no subsequent sentence in step 111, the process jumps to step 117. If the condition is not satisfied in step 110, the process proceeds to step 113, and it is checked whether or not there is an executable statement at the time of dissatisfaction. If there is an executable statement at the time of dissatisfaction, the process proceeds to step 114, stops before the executable statement at the time of dissatisfaction, and waits for the trigger switch 36a to be pressed and a trigger signal to be output at step 115. If there is no executable statement at the time of dissatisfaction in step 113, the process jumps to step 117, the counter I is incremented, and the process returns to step 102.

By the above processing, the condition determining unit of the conditional control statement and the processing unit of the branch destination are provided as separate blocks. For example, I
Blocks of the F statement are separated as shown in FIG. 3. When one block is executed by the pointer, the single block is stopped by the pointer if the "conditional expression" is true, and the single block is stopped by the pointer if it is false. Here, sentence 1 and sentence 2 may be NC sentences or macro sentences. As described above, since the condition determination and the machine operation are not executed in one block, the structured NC language program can be debugged in the same operating environment as the conventional single block execution.

[0011]

As described above, the present invention has the above-mentioned configuration and processes the condition determination unit of the conditional control statement and the processing unit of the branch destination as separate blocks.
By utilizing the language description format, the NC program can be debugged safely by single block execution.

[Brief description of drawings]

FIG. 1 is a diagram showing a description example in an unstructured NC language format.

FIG. 2 is a diagram showing a description example in a structured NC language format.

FIG. 3 is a diagram showing a block of an IF statement.

FIG. 4 is a block diagram showing an overall configuration.

FIG. 5 is a flowchart showing the processing of the CPU when executing a single block.

[Explanation of symbols]

 20 Numerical control device 21 CPU 36a Trigger switch

Claims (1)

[Claims] 1. A numerical control device for controlling a controlled device by reading and executing a numerical control program block by block, and a judging means for judging whether or not the read numerical control program content is a conditional statement. , A content determining means for determining the content of the conditional sentence when the determining means determines that the conditional statement is present, and an operation for stopping the operation before the next instruction executed according to the result of the content determining means A numerical controller provided with a stop means and a trigger signal output means for giving a trigger signal for instructing execution of the next instruction.