WO1997014999A1

WO1997014999A1 - Numerical control system

Info

Publication number: WO1997014999A1
Application number: PCT/JP1996/003043
Authority: WO
Inventors: Hideaki Inoue; Teruhisa Hatta
Original assignee: Fanuc Ltd
Priority date: 1995-10-19
Filing date: 1996-10-21
Publication date: 1997-04-24
Also published as: JPH09114513A

Abstract

A numerical control system is constituted of a data processor (1) and a numerical controller (2). When a request of access to the internal memory (2b) of the controller (2) from an application program (1a) is outputted, an access acceptance/rejection judging means (1b) judges whether the memory (2b) is accessible or unaccessible while referring to access acceptance/rejection information in an access acceptance/rejection information storing means (1c). An access request executing means (2a) in the controller (2) executes the access to the memory (2b) only when the access to the memory (2b) is allowed. Data which must not be freely accessed from users, are made unaccessible in this way, and any access to the data is rejected.

Description

Harm

Numerical control system

Technical field

The present invention relates to a numerical control system in which a data processing device having individual processing functions is connected to a numerical control device, and in particular, to a numerical control system capable of accessing the internal memory of the numerical control device from the data processing device. About the system.

Background technology

Many numerical controllers (CNC) are connected to a programmable controller (PC), a man-machine controller (MMC), and the like, and a numerical control system is configured including these. Recently, there is a numerical control system in which the MMC is replaced with a personal computer (personal computer). MMC and personal computers are data processing devices that have a separate processor from the numerical control device. In the following description, a numerical control system having MMC will be described as an example.

The MMC can input and output data interactively, and can incorporate various special programs (hereinafter referred to as applications) for the user to operate the numerical control system. Users can arbitrarily create applications to improve system operability. The user can access various data stored in the internal memory of the CNC or PC by issuing a command through the application. Access to the internal memory of the CNC or PC from the application is made possible by using the data window. The data window is a library function that provides a data communication function between the CNC and the MMC, and is provided in both the CNC and the MMC. When an application in the MMC outputs an access request according to the rules of this function, the request is passed from the data window of the MMC to the data window of the CNC, and the CNC side Data windows perform access as requested. The DataWindow offers a very wide range of features to increase application flexibility.

At the same time, there are some data in the CNC that can be freely rewritten by the user without any problem. Important data that would cause the entire system to malfunction if it was poorly rewritten. is there. If such important data can be freely accessed from the application, the operation of the system may be stopped due to an erroneous operation or erroneous input. There is a risk of serious failure.

Conventionally, applications on the MMC side have eliminated access requests for such important data. In other words, the programmer programmed the application so that it did not include access to the inside of the CNC that would adversely affect the system. And while an application is required to include sufficient specifications for its intended use, Care was taken not to include extra functions. As a result, failures such as a system stop due to an erroneous operation of the operator or an erroneous input were prevented.

However, since many applications are created according to the purpose of use, it is necessary for programmers to take great care to ensure that each one does not adversely affect the CNC. Increased the burden on employees.

Even if an application is created to deny access requests for important data in the CNC, a bug in the application will adversely affect the operation of the CNC. For this reason, misses when creating an application in the MMC may significantly disrupt the operation of the CNC. To prevent this, it is necessary to pay close attention to the parts other than the original purpose when creating an application.

Moreover, in general, it is the CNC manufacturer that creates the important programs inside the CNC, and the application is created by the user who purchases the CNC and builds a numerically controlled machine tool. . Therefore, it is desirable for users to be able to create applications without being aware of the internal configuration of CNC.

Disclosure of the invention

The object of the present invention has been made in view of the above points, and it is possible to request access to the CNC from the application on the data processing device side only within a limited range. Another object of the present invention is to provide a numerical control device control system including the data processing device and the CNC.

In order to achieve the above object, according to the present invention, a numerical control system capable of accessing the internal memory of a numerical control device from a data processing device having individual processing functions is provided by Access permission / non-permission information storage means for storing access permission / non-permission information indicating whether access to arbitrary data in the internal memory is permitted; and an access request to the internal memory in the data processing device. Is output, the access permission / inhibition determining means for referring to the access permission / inhibition information to determine whether or not access to the data to be accessed is permitted, and the access permission / inhibition determination means If it is determined that the access is permitted, the access request fulfills the access to the internal memory according to the access request. It has a means and a means.

As described above, according to the present invention, the access permission information is stored in advance in the access permission information storage means in the data processing device, and the access request from the data processing device to the internal memory of the numerical control device is transmitted. When this occurs, the access permission / inhibition information is referred to to determine whether or not the access is permitted. If the access is not permitted, the access request is rejected. Important data in the numerical control unit is not destroyed by erroneous operation of the user who operates the processing unit or bugs in the application. Become. As a result, when creating an application, programming can be performed without being conscious of the memory configuration in the numerical control device, and the speed of application development and the reliability of the entire system can be improved. The performance is improved.

Brief explanation of drawings

FIG. 1 is a block diagram showing a schematic configuration of a numerical control system according to the present invention.

Fig. 2 is a block diagram showing the configuration of a numerical control system for implementing the present invention.

FIG. 3 is a diagram showing an internal configuration of a data window provided with a function for determining whether access is possible.

FIG. 4 is a flowchart showing the processing procedure of the numerical control system when an access request to the RAM of the CNC is generated in the MMC.

Figure 5 shows a block diagram of the storage function of access permission information.

BEST MODE FOR CARRYING OUT THE INVENTION First, an outline of a configuration of a numerical control system according to the present invention will be described with reference to a block diagram of FIG.

The numerical control system includes a numerical control device 2 and a data processing device 1. The data processing device 1 has its own processor and can incorporate an application la created by the user. As the data processing device 1, a man-machine controller (MMC) or a small computer is used. The data processing device 1 includes access permission / inhibition determining means lb and access permission / inhibition information storage means lc. The access permission / non-permission information storage means 1c includes information as to whether access to the data in the internal memory 2b of the numerical controller 2 is permitted or not permitted from the data processing device. It is stored as information.

The numerical control device 2 includes access request execution means 2a and internal memory 2b.

When an access request to the internal memory 2b of the numerical controller 2 is output from the application 1a, the access availability determination means 1b refers to the access availability information in the access availability information storage means 1c. Then, it is determined whether or not access is permitted. The access request execution means 2a in the numerical controller 2 executes access to the internal memory 2b only when access is permitted.

In this way, by denying access to data that should not be freely accessed by the user, etc., the data processing device denies access to that data. be able to. Therefore, important data in the numerical control device is not destroyed by a user's erroneous operation or a bug in the application. In FIG. 1, the access permission / non-permission determining means 1 b and the access permission / non-permission information storage means 1 c are provided in the data processing device 1. These may be provided in the numerical control device 2.

Next, a numerical control system for implementing the present invention will be described. The configuration will be described with reference to the block diagram in FIG.

The processor 11 is connected to the ROM 19, RAM I3, nonvolatile memory 14, axis control circuit 21 and PMC (programmable 23, and the input / output interface X-source 46 are connected respectively. Note that PMC is a type of PC (programmable controller).

The processor 11 controls the entire interactive numerical controller according to the system program stored in the ROM 12. EPOM or EPROM is used for R0M12. For RAM I 3, SRAM or the like is used to store various data or input / output signals. The non-volatile memory 14 uses a CMOS that has been picked up by a not-shown notch, and the parameters and pitches that should be retained even after the power is turned off. Stores error correction amount and tool correction amount. The NC machining program is stored in this non-volatile memory 14.

The axis control circuit 21 receives an axis movement command from the processor 11 and outputs the axis command to the servo amplifier 22. Upon receiving the movement command, the servo amplifier 22 drives the servomotor of the machine tool 50. When executing the NC program, the PMC 23 receives T function signals (tool selection commands), etc., processes these signals with a sequence program, and outputs signals as operation commands Then, the machine tool 50 is controlled. PMC 23 is a status signal from machine tool 50 Then, it performs the sequence processing and transfers the necessary input signal to the processor 11.

In addition, the input / output interface 46 is used to transfer NC data to and from external devices, such as a floppy disk drive (FDD), printer, or PTR (paper tape reader). It controls the input and output of data including.

Note that all of the above components are connected to each other by a bus 19, and this bus 19 has a processor for dialogue, which is separate from the processor 11 for the NC. 31 is connected by bus 29.

The interactive processor 31 has a bus 39, a ROM 32, a RAM 33, a non-volatile memory 34, a VRAM (video RAM) 35, and a graphic control circuit 3. 6 is fired.

The processor 31 executes the interactive processing program stored in the ROM 32, and the work or data that can be set on the interactive data input screen is described later in a menu format. Display on the display device 4 3. In addition, a machining program is created from the data input in this manner, and the entire operation trajectory of the tool is displayed as a back ground animation. The ROM 32 stores an input screen and the like for the interactive data processing in addition to the interactive processing program. An SRAM or the like is used as the RAM 33 to store various data for conversation. Non-volatile memory 34 was knocked up by a battery not shown CMOS is used to store program data, machining programs, and information on whether or not access is possible in the CNC, which should be retained even after the power is turned off. The VR AM 35 is a RAM that can be accessed at high speed, and performs a cutting simulation of the machine tool 50 based on the machining program stored in the nonvolatile memory 34 as an NC statement. At this time, a graphic image for displaying the animation is stored. The graphic control circuit 36 converts the graphic data stored in the VRAM 35 into a signal for display and outputs it.

In addition, a CRT / MDI (cathode ray tube / manual data input) is used as a human interface with the operating system. The panel 40 is connected to a bus 19, and a graphic control circuit 41, a switch 42, a display device 43, a keyboard 44, and a software key 45 are provided.

The graphic control circuit 41 converts a digital signal output from the processor 11 or the like into a signal for display and outputs the signal. The switch 42 switches the display signal output from the graphic control circuit 36 or the graphic control circuit 41 and supplies the signal to the display device 43. As the display device 43, a CRT or a liquid crystal display device is used. Keyboard 4 4 symbolic Kuki, Ri Do from the numerical keys and the like, necessary graphic data, _c source oice c d ackee 4 5 the Isseki NC de entered using these keys in the system program, etc. This is a command key whose function changes, and the function name and the like are displayed at a predetermined screen position of the display device 43. In order to display the knock-ground animation, the program data is processed into display data by the interactive processor 31 and displayed by the graphic control circuit 36. And is displayed on the display device 43. Similarly, when a machining program is created interactively, the shape, the machining conditions, and the like are converted into signals for display by the graphic control circuit 41 and displayed on the display device 43.

Next, the case where the present invention is implemented by the hardware numerical control system as described above will be described in detail.

In this numerical control system, the MMC as a data processing device accesses the internal memory of the CNC using a data window. In this case, by providing the data window in the MMC with a function for determining whether or not access is possible, it is possible to reject access from the MMC to important data in the CNC.

Next, the internal configuration of a data window provided with a function of determining whether access is possible will be described with reference to FIG.

As the components of the access permission / non-permission determination function, the MMC 30 has an application 30a, a data window 37, and a nonvolatile memory for storing the access permission / prohibition information. Re 34 is provided. Further, a display device 43 is connected to the MMC 30. On the other hand, the CNC 10 is provided with a data window 15 and a RAM I 3.

The data window 37 on the MMC 30 side determines whether the access request is a read request or a write request. Read / write discriminator 37a, access permission / non-permission discriminator 37b that determines whether an access request can be executed. An access request output part 3 7c for outputting an access request, and an error message output part 3 for outputting an error message to the display device 43 when the access is impossible. Has 7 d.

In this example, of the data stored in RAM 10 of CNC 10, the system program cannot read and write data from MMC 30, and the data A can be read from MMC 30. Data can be read / written by MMC30, and data can be read / written. At this time, the storage area of the system program (A000 to AFFF) cannot be read / written to the non-volatile memory 34 in the MMC 30 and the storage area of the data A (B000 To BFFF) can be read. Z-write cannot be performed. Data B storage area. Stores access enable / disable information that allows (C000 to CFFF) to be read-write. The method of storing this access availability information will be described later.

In the above configuration, when an application 30a outputs an access request to the RAM 10 of the CNC 10 from the application 30a, the access request is processed in the data window 37. . The data window 37 determines whether the access request is a read request or a write request. Based on the result, the access permission / non-permission judging part 37 b is configured to store the key in the nonvolatile memory 34. Referring to the access permission information, it is determined whether or not the access request can be executed. In other words, in the case of a read request, the system program (address: A000 to AFFF) cannot be accessed. In the case of a write request, the system program (address: A000 to AFFF) and data overnight A (address: B000 to BFFF) cannot be accessed.

If access is possible, a signal indicating access permission is output from the access permission / inhibition judging section 37b to the access request output section 37c. Upon receiving the access permission signal, the access request output unit 37c outputs the access request output by the application to the CNC 10 when the access permission signal is received. The access request is received by the data window 15 on the CNC 10 side. Then, the overnight window 15 executes access to the RAM 3 according to the access request.

If the access determination section 37b determines that access is not possible, a signal indicating this is output to the error message output section 37d. When the error message output section 37 d receives the access-disabled signal, the error message output section 37 d outputs a message to the effect that access has been denied to the display device 43. By confirming this message, the user knows that the instruction issued to the application 30a caused access to the CNC 10 important data and was rejected.

Next, the MMC process, which is started when an access request to the RAM 13 of the CNC occurs in the MMC, The processing procedure of the sensor will be described with reference to the flowchart of FIG. When there is an access request for specific data or a program stored in the RAMI 3 of the CNC by the operator's operation, the access request is first a read request or a light request. Is determined (step S 1).

If it is a write request, it is determined whether the data or the program to which the write request is applied is previously identified as writable (step S2). As a result, if writing is possible, a command is issued to the CNC processor to execute the writing request (step S4), and this processing ends. On the other hand, if writing is not possible, an indication that writing is not possible is output (step S3), and this processing ends.

If the determination in step S1 is a read request, it is determined whether the data or the program targeted by the read request has been identified in advance as readable. Judgment is made (step S5). As a result, if the read is possible, a command is issued to the CNC processor to execute the read request (step S6), and this processing ends. On the other hand, if reading is not possible, an indication that reading is not possible is output (step S3), and this processing ends.

In this way, the access availability information regarding the CNC internal information is stored in the MMC in advance, and when the MCC issues a request for access to the CNC internal memory. In addition, access to important data in the CNC can be restricted by referring to the access availability information. Therefore, there is no need to include a function to deny access to important data in CNC in applications to be incorporated into MMC. In other words, when creating an application, there is no need to be aware of the configuration of the CNC memory space. This improves work efficiency when creating applications. Also, even if there is a bug in the application, it is not possible to access the area where access is not allowed, so the possibility that the numerical controller malfunctions due to a bug in the application is reduced. .

Finally, the storage function of the access permission / inhibition information to the MMC will be described with reference to the block diagram in FIG.

In the configuration shown in FIG. 5, an access permission information setting section 37 e is provided in the data window 37. The access permission information setting section 37 e writes the data accessed by the access request output from the access request output section 37 c to the access permission information in the non-volatile memory 34. Set as data that permits access. That is, by outputting an access request for predetermined data in the CNC, the operator can teach that the data is data to be permitted to sum access. After this, this data can be accessed. In other words, this means that the teaching function is incorporated. In order to execute this teaching function, the key is used. The condition is that MMC can access the data for which access is not set. That is, in this case, the access permission / non-permission judging section 37b (shown in FIG. 3) judges that data other than the data which is not "accessible" is "accessible". Alternatively, teaching can be performed while the function of the access permission / non-permission determining unit 37b is stopped.

In this example, an access availability information editing function unit 38 is further provided. The access permission / inhibition information editing function section 38 outputs an access permission / inhibition information editing screen to the display device 43, and changes the content of the access permission / inhibition information in accordance with the operation of the keyboard 44. Using this editing function, it is possible to freely set which area is accessible and which area is inaccessible. In addition, using both the above-mentioned teaching function and the editing function, the access permission / prohibition information may be first stored by the teaching, and then the detailed setting change may be performed by the editing function. It is possible.

Claims

The scope of the claims

In a numerical control system that can access the internal memory of a numerical control device from a data processing device with individual processing functions,

Arbitrary data in the internal memory from the data processing device

-When an access request to the internal memory is output in the data processing apparatus, the access permission / inhibition information storage means storing access permission / inhibition information indicating whether or not access to the terminal is permitted. Access availability determining means for referring to the access availability information to determine whether access to the data to be accessed is permitted; and

Access request execution means for executing access to the internal memory in accordance with the access request when the access permission / non-permission judgment means determines that access is permitted;

A numerical control system characterized by having:

The numerical value according to claim 1, wherein said access permission / inhibition information storage means stores access permission / inhibition information corresponding to each of a read request and a write request. Control system.

Claims are characterized by further comprising an error message display means for displaying an error message on a display device when the access permission / non-permission judgment means determines that the access is not permitted. Numerical control described in item 1 of the range system.

In a state where access to the undetermined data of the internal memory for which access permission is not set is enabled from the data processing device, access to the undetermined data is executed from the data processing device. In this case, the apparatus further comprises access permission information setting means for setting the accessed undetermined data as the access permission information in the access permission information. Numerical control system according to the paragraph.

5. Displaying the access permission / inhibition information editing screen on the display device, and further having access permission / inhibition information editing means for changing the content of the access permission / inhibition information in accordance with an input signal from the input device. The numerical control system according to claim 1, wherein the numerical control system is characterized in that:

6. In a numerical control system that combines a data processing device and a numerical control device,

The data processing device,

A means to incorporate application programs created by users,

Access permission / non-permission information storage means for storing information on data stored in the internal memory of the numerical control device, the information being classified into those which are permitted and those which are not permitted from the data processing device;

The target data to be accessed is stored in the internal memory of the numerical controller. Access permission / non-permission determining means for determining whether or not access is permitted by referring to the access permission / prohibition information storage means; and

The numerical control device includes:

An internal memory that stores various data,

Upon receiving information from the above-mentioned access availability determining means that the data to be accessed is one for which access is permitted, the access to the data stored in the internal memory is made. Access request execution means to be executed, and

The above numerical control system.

In a numerical control system that combines a data processing device and a numerical control device,

The data processing device includes means for incorporating an application program created by a user, and the numerical control device includes:

Internal memory for storing various data,

Access permission / non-permission information storage means for storing information on data stored in the internal memory of the numerical control device that is classified into those permitted and those not permitted to access from the data processing device; ,

For the data stored in the internal memory of the numerical controller, refer to the above-mentioned access permission / non-permission information storage means to determine whether the target data to be accessed is permitted access. Access judgment Means,

Upon receiving information from the above-mentioned access availability determining means that the data to be accessed is one for which access is permitted, an access request to execute access to the data stored in the above-mentioned internal memory is received. Means of execution and

The above numerical control system.

. In a numerical control system that combines a data processing device and a numerical control device,

The data processing device,

An access determination unit that determines whether an access request to data stored in the internal memory of the numerical controller is executable from the data processing device, and the access determination unit executes the access request. An access request is output to the numerical controller only when it is determined that the access is possible.

Access permission / inhibition information storage means for storing access permission / inhibition information for programs and data stored in predetermined areas of internal memory of the numerical controller, respectively;

The numerical control device includes:

Including an internal memory for storing programs and data in a predetermined area, and a data window for receiving an access request issued by the data processing device. The above numerical control system.

The data window in the data processing device described above further includes a read / write determination unit that determines whether the access request is a read request or a write request. The access permission / non-permission information storage means is provided inside the numerical control device, and stores information on read / write permission and write permission / non-permission of programs and data stored in predetermined areas of the memory. 9. The numerical control system according to claim 8, wherein the numerical control system stores the numerical control system.