JPH06324717A - Edit system for sequence program - Google Patents

Abstract

PURPOSE:To edit a sequence program without interruption of execution of the sequence program in the edit system of the sequence program at debugging. CONSTITUTION:A program execution means 51 executes sequentially a sequence program in a program storage area 23a from a head address, while a screen edit means 52 displays the sequence program on a screen of a display device 31 and when the operator operates a keyboard 32 or the like to edit the sequence program, the edited content is written in an edit data storage area 23b. A rewrite means 53 interrupt, e.g. each one scanning of the sequence program to confirm a content of the edit data storage area 23b and rewrites the content of the program storage area 23a when the sequence program is newly edited. When the interrupt processing is finished, the program execution means 51 executes again the sequence program.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a PC (programmable
The present invention relates to a sequence program editing method for editing a sequence program executed by a controller, and particularly to a sequence program editing method during debugging.

[0002]

2. Description of the Related Art Conventionally, when a sequence program is created, in order to confirm whether it operates normally,
The sequence program was actually executed for debugging. If there is a portion to be corrected, the sequence program execution is interrupted, the editing operation is performed, and then the debugging is repeated.

[0003]

However, if the execution of the sequence program is interrupted each time editing is performed, there is a problem that the work efficiency is low.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sequence program editing method capable of performing editing without interrupting the execution of the sequence program.

[0005]

According to the present invention, in order to solve the above problems, a PC (programmable controller) is used.
In a sequence program editing method for editing a sequence program to be executed by, a program storing means for storing the sequence program, a program executing means for executing the sequence program in the program storing means, and the sequence A screen editing means for displaying a program on a screen and performing editing by an operator, an edit data storing means for storing the edited data, and an edit data storing means for interrupting during execution of the sequence program. An editing method of a sequence program is provided, which comprises: a program rewriting unit that confirms the contents and rewrites the contents of the program storage unit when the sequence program is newly edited.

[0006]

[Function] While the program executing means executes the sequence program in the program storing means, the screen editing means displays the sequence program on the screen,
The operator edits the sequence program and stores the edited data in the edited data storage means. And the program rewriting means
The contents of the edited data storage means are checked by interrupting the execution of the program, and if the sequence program is newly edited, the contents of the program storage means are rewritten.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram of the hardware of the whole numerical controller (CNC) for implementing the present invention. The processor 11 is a central processor for controlling the entire numerical control device 10, reads the system program stored in the ROM 13 via the bus 19, and executes the control of the entire numerical control device 10 according to this system program.

The shared RAM 12 is composed of the CNC 10 and the PMC 20.
RAM for exchanging data with each other, and exchanging data with each other via this shared RAM 12. At the same time, it stores the data required for access from both sides.

The RAM 14 stores temporary calculation data, display data and the like. The nonvolatile memory 15 includes a CMOS backed up by a battery and a flash R.
OM or the like is used to store the tool correction amount, pitch error correction amount, machining program, parameters, and the like. In addition, the non-volatile memory 15 also stores parameters necessary for the PMC 20 side.

The graphic control circuit 16 converts digital data such as the current position of each axis, alarms, parameters and image data into an image signal and outputs it. This image signal is sent to the display device 31 of the CRT / MDI unit 30,
It is displayed on the display device 31. The display device 31 has a PMC.
The parameters on the 20 side, the ladder diagram, and debug data to be described later can also be displayed. The data at this time is sent from the PMC 20 via the shared RAM 12. Further, the display device 31 displays an editing screen of a sequence program described later.

The interface 17 receives data from the keyboard 32 in the CRT / MDI unit 30 and transfers it to the processor 11. Also, data to the PMC 20 side can be input from the keyboard 32, and the data is sent to the PMC 20 side via the shared RAM 12.

An automatic programming device 40 is connected to the interface 18, and the automatic programming device 4 is connected to the interface 18.
The sequence program created by 0 is read via the interface 18 and sent to the PMC 20. Further, the interface 18 is connected to an external device such as a paper tape reader, a paper tape puncher, a paper tape reader / puncher, a printer and the like, which are not shown. The processing program is read from the paper tape reader. Further, the processing program edited in the numerical controller 10 can be output to the paper tape puncher.

The processor 11 and the shared RAM 12,
Elements such as the ROM 13 are connected by a bus 19. In the figure, an axis control circuit for controlling a servo motor, a servo amplifier, a spindle control circuit, a spindle amplifier, a manual pulse generator interface, etc. are omitted.

A PMC (programmable machine controller) 20 is a PC (programmable controller)
And is built in the numerical control device 10. P
The MC 20 has a processor 21 for PMC, the processor 21 is connected to the shared RAM 12 by a bus 26, and the shared RAM 12 is coupled to the bus 19 of the CNC 10. Further, the ROM 22 is coupled to the bus 26. A management program for controlling the PMC 20 is stored in the ROM 22.

Input / output signals are stored in the RAM 23, and the contents are rewritten as the sequence program is executed. A CMOS backed up by a battery, a flash ROM, or the like is used for the non-volatile memory 24, and a sequence program created by the automatic programming device 40 is stored therein. The sequence program is generally written in a ladder language, but may be written in a high-level language such as Pascal. The sequence program stored in the non-volatile memory 24 is transferred to the RAM 23 during operation, and the processor 21 stores the RAM in the RAM.
Read and execute 23 programs. Further, the sequence program can be displayed on the display device 31. In addition to the sequence program, the non-volatile memory 24 stores data to be retained after power-off.

The I / O control circuit 25 is connected to the bus 26 and converts the output signal stored in the RAM 23 into a serial signal and sends it to the I / O unit 27. Also, a serial input signal from the I / O unit 27 is converted into a parallel signal and sent to the bus 26. The signal is stored in the RAM 23 by the processor 21. The input / output signals stored in the RAM 23 and the data stored in the non-volatile memory 24 can be displayed on the display device 31 of the CRT / MDI unit 30.

The processor 21 receives the shared RA from the CNC 10.
A command signal such as an M function command or a T function command is received via M12, temporarily stored in the RAM 23, and the command is stored in the ROM.
22 according to the sequence program stored in the I / O unit 2 via the I / O control circuit 25.
Output to 7. The output signal controls hydraulic equipment, pneumatic equipment, and electromagnetic equipment on the machine side.

Further, the processor 21 is the I / O unit 2
Upon receiving an input signal such as a limit switch signal on the machine side and a signal of an operation switch on the machine operation panel from 7, the input signal is temporarily stored in the RAM 23. Input signals that do not need to be processed by the PMC 20 are sent to the processor 11 via the shared RAM 12. Other signals are processed by the sequence program, some signals are output to the CNC side, and other signals are output signals via the I / O control circuit 25.
Output from the O unit 27 to the machine side.

On the other hand, the sequence program can include instructions for controlling the movement of each axis. When these instructions are read by the processor 21, they are sent to the processor 11 via the shared RAM 12 to control the servo motor. Similarly, the spindle motor and the like can also be controlled by a command from the PMC side.

Next, a specific procedure of the sequence program editing method of this embodiment will be described. FIG. 1 is a conceptual diagram of the editing method of the sequence program of this embodiment. The RAM 23 is provided with a program storage area 23a for storing a sequence program read from the non-volatile memory 24 and an edit data storage area 23b for storing edited data. The program execution means 51 uses the sequence storage in the program storage area 23a.
The program is executed sequentially from the start address. On the other hand, the screen editing means 52 displays the sequence program on the screen of the display device 31, and when the operator edits the sequence program by operating the keyboard 32 or the like by a method described later, the edited content is displayed. Write to the edit data storage area 23b.

The rewriting means 53 checks the contents of the edit data storage area 23b by interrupting every predetermined time, for example, every scan of the sequence program. At this time, if the sequence program is newly edited, the contents of the program storage area 23a are rewritten. When the interrupt process is completed, the program executing means 51 executes the sequence program again. As a result, the contents of the sequence program can be edited and updated without interrupting the execution of the sequence program.

The sequence program after the completion of the debugging and editing work is stored again in the non-volatile memory 24 by the final storage means 54. The program executing means 51, the screen editing means 52, the rewriting means 53, and the final storing means 54 are all executed by software.

FIG. 3 is a diagram showing an example of the editing screen displayed on the display device 31. On the edit screen 31a, the sequence program currently being executed is displayed, for example, as a ladder diagram 311. Further, software key menus 321 to 325 are displayed below the ladder diagram 311.

In the edit screen 31a, by placing the cursor 312 on the portion to be corrected, selecting the character to be newly input from the software key menus 321 to 325, and pressing the key on the keyboard 32 corresponding to the selected menu. , The portion of the cursor 312 is rewritten with a new character. On the other hand, the address or the like can be rewritten by operating the ten keys or the character keys of the keyboard 32.

FIG. 4 is a diagram showing a temporal processing division performed by the processor 21. As shown in the figure, the PMC 20 performs the entire process in a cycle of 8 ms, for example. The processing time of 8 ms is roughly divided into three tasks, an A task 61, a B task 62, and a C task 63. In the A task 61, an emergency processing program such as emergency stop and alarm processing is executed. In the B task 62, the sequence program is executed by the program executing means 51. However, in reality, not all sequence programs can be executed within this time, so a part of the plurality of divided programs is executed. Further, in the B task 62, the processing by the rewriting unit 53 is also executed. In the C task 63, a program such as display control with less time constraint is executed. The processing by the screen editing means 52 and the final storage means 54 is executed by the C task 63.

Next, the processing flow on the processor 21 side will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart showing a processing procedure when the sequence program is executed (B task). [S11] The sequence program is executed in order from the start address. [S12] It is determined whether or not one scan of the sequence program is completed. If completed, the process proceeds to step S13, and if not completed, the process returns to step S11. [S13] It is determined whether or not new edit data is stored in the edit data storage area 23b of the ladder 23. If new edit data is stored, the process proceeds to step S14, and if not, this flowchart is ended. [S14] The sequence program is rewritten according to the edited data.

FIG. 6 is a flowchart showing the processing procedure when the editing function is executed (C task). [S21] It is determined whether or not the edit operation of the sequence program is performed by the edit screen 31a and the keyboard 32. If yes, the process proceeds to step S22, and if not, the present flowchart is ended. [S22] The input edit data is written in the edit data storage area 23b.

As described above, in the present embodiment, when the editing operation is performed, the inside of the program storage area 23a is rewritten between executions of the sequence program, so that the sequence program is edited without interrupting the debugging work. Can be done easily.

[0029]

As described above, in the present invention, the sequence program is interrupted during execution of the sequence program.
Since the contents of the program are rewritten, it is possible to edit without interrupting the execution of the sequence program.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an editing method of a sequence program of this embodiment.

FIG. 2 is a numerical controller for implementing the present invention (CN
C) A block diagram of the entire hardware.

FIG. 3 is a diagram showing an example of an edit screen displayed on a display device.

FIG. 4 is a diagram showing temporal processing sharing performed by a processor.

FIG. 5: Execution of sequence program (B task)
5 is a flowchart showing the processing procedure of step S1.

FIG. 6 is a flowchart showing a processing procedure when an editing function is executed (C task).

[Explanation of symbols]

10 Numerical Control Unit (CNC) 20 PMC (Programmable Machine Controller) 21 Processor 22 ROM 23 RAM 23a Program Storage Area 23b Edited Data Storage Area 24 Nonvolatile Memory 30 CRT / MDI Unit 31 Display Device 32 Keyboard 51 Program Execution Means 52 Screen editing means 53 Rewriting means

Claims (4)

[Claims] 1. A PC (programmable controller)
In a sequence program editing method for editing a sequence program executed by, a program storage means for storing the sequence program, a program execution means for executing the sequence program in the program storage means, A screen editing means for displaying a program on a screen and performing editing by an operator, an edit data storing means for storing the edited data, and an edit data storing means for interrupting during execution of the sequence program. Check the contents and confirm that the sequence
And a program rewriting unit for rewriting the contents of the program storing unit when the program is newly edited. 2. The sequence program editing method according to claim 1, wherein the program rewriting means is configured to perform the interrupt at predetermined time intervals. 3. The editing of a sequence program according to claim 1, wherein the screen editing means is configured to convert an editing portion on which a cursor is placed into a character selected by a software key menu. method. 4. The sequence program editing method according to claim 1, wherein the edited sequence program is stored in a non-volatile memory.