JPH11167404A - Numerical controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerical controller which analyzes the cause of a trouble when the trouble occurs and restores a control system at an early stage. SOLUTION: Processing information transmitted among the respective modules of a system control part 121, an analysis part 122, an operation control part 123 and a PLC part 124 or information on an operation result which the respective modules output are recorded in a memory 125 for the respective modules and for the respective operation units of the modules. When the trouble occurs, information which are recorded in the memory 125 through a man machine interface part and correspond to the respective modules are associated each other and are outputted or information stored in the memory 125 are transmitted to an outer unit 104 through a driver part when the trouble occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller for controlling the movement of a machine tool or the like, and more particularly to a man-machine interface, an operating system, a driver, an interpreter, a servo / spindle pulse generator, and a program logic. In a module-incorporated numerical controller equipped with a module such as a controller, the internal data of each module is recorded for each operation unit unique to the module, and these are output in association with each other. The present invention relates to a numerical control device that outputs more appropriate and more information even when a trouble occurs, and enables analysis of a cause of the trouble when trouble occurs and early recovery of the control system.

[0002]

2. Description of the Related Art Conventional numerical control (NC: Numerical Control)
Roller devices include, for example, those shown in FIG. In FIG. 1, a numerical controller 202 of the conventional example is shown.
Is connected to the display / operation panel 201, controls a man-machine interface, performs communication (data transfer) with other external devices, and controls a system control unit 221 that controls each module in the numerical control device 202. An analyzing unit (interpreter) 222 for sequentially interpreting an NC program supplied through the system control unit 221 and converting the NC program into an NC command; and a command pulse to a servo mechanism (servo amplifier, spindle amplifier, etc.) based on the NC command. An operation control unit 223 that generates and drives and controls the machine tool 203 via the servo mechanism; and a PLC (program logic controller) unit 224 that activates a ladder program or the like corresponding to the NC command and controls the machine tool 203. It is provided with. Such a numerical control device 202 has been created and developed as a device for operating a machine tool 203 or the like on behalf of a human to produce a homogeneous product faster and cheaper. In order to improve product productivity, In particular, it is important to analyze the cause of a trouble and to quickly recover the control system when the trouble occurs, and it has been regarded as an important function of the numerical controller or a control system including the same. For example, in the "failure diagnosis device" disclosed in Japanese Utility Model Laid-Open No. 5-2205, when a failure of the numerical control device occurs, the state of the numerical control device before and after the failure occurred is reproduced, and the failure is easily performed. In order to be able to analyze the situation, the upper controller can stop sampling the internal data of the numerical controller when an alarm or other trouble occurs, and the sampled internal data of the numerical controller is sent to the numerical controller. By sending
There has been proposed an apparatus in which a numerical controller can reproduce a numerical control state at the time of sampling.

[0003]

However, in the above-mentioned conventional numerical controller, the data sampled as internal data of the numerical controller is, in the configuration of FIG. Numerical control devices that control the machine 203 (command pulses to the servo mechanism) and control information of the PLC unit 224 on the machine tool 203 and perform more advanced numerical control analyze the cause of failure from only these internal data. Has a problem that the numerical control is complicated and requires skill. In addition, even if an attempt is made to reproduce the numerical control state at the time of occurrence of a failure in the numerical control device, when a failure that cannot be reproduced occurs,
There was also a problem that the cause of the failure could not be clarified. These problems are remarkable especially in troubles with extremely low frequency of occurrence. The present invention has been made in view of the above-mentioned conventional problems, and includes modules such as a man-machine interface unit, an operating system unit, a driver unit, an interpreter unit, a servo / spindle pulse generation unit, and a program logic controller unit. In a module embedded type numerical control device, by recording internal data of each module for each operation unit unique to the module and outputting them in association with each other, even when a trouble or the like with extremely low frequency of occurrence occurs, It is an object of the present invention to provide a numerical control device capable of outputting more appropriate and more information to enable analysis of a cause of a trouble and early recovery of the control system when the trouble occurs.

[0004]

According to a first aspect of the present invention, there is provided a numerical control apparatus comprising: a man-machine interface unit; an operating system unit; a driver unit; an interpreter unit; Unit, a numerical controller for numerically controlling a machine tool or the like including a module such as a program logic controller unit, the processing information transmitted between the respective modules or information such as the operation results output by the respective modules, and the like, each module Storage means for recording, for each predetermined operation unit of the module. The numerical controller according to claim 2 is the numerical controller according to claim 1, wherein the man-machine interface unit transmits information corresponding to each module recorded in the storage unit when a trouble occurs. It is output in association. The numerical control device according to claim 3 is the numerical control device according to claim 1 or 2.
Wherein the driver unit transmits information stored in the storage unit to an external device when a trouble occurs. In the numerical control device according to the present invention, processing information transmitted between modules such as a man-machine interface unit, an operating system unit, a driver unit, an interpreter unit, a servo / spindle pulse generation unit, and a program logic controller unit is stored in the storage unit. Or, information such as the operation results output by each module
For each module, the information is recorded for each predetermined operation unit of the module, and when a trouble occurs, information corresponding to each module recorded in the storage means is output in association with each other via a man-machine interface unit, or a driver The information stored in the storage means is transmitted to an external device via the unit. In this way, by recording the internal data of each module for each operation unit peculiar to the module and correlating them for display output or transmission output, even if a trouble or the like with extremely low frequency of occurrence occurs, it becomes more appropriate. More information can be obtained, and when a trouble occurs, analysis of the cause of the trouble and early recovery of the control system can be performed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the numerical controller according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram of a numerical control device according to an embodiment of the present invention. In the figure, the numerical controller 102 according to the present embodiment
Is a display / operation panel 1 as input and display output means.
01, for numerically controlling the machine tool 103, a system control unit 121, an analysis unit (interpreter)
122, each module of an operation control section 123 and a PLC (program logic controller) section 124, and a memory 125 as storage means.
The system control unit 121 is connected to the display / operation panel 101 and controls a man-machine interface unit, and communicates with other external devices 104 connected to the driver unit by an internal driver unit (serial communication, network communication). Communication and data transfer to and from an external storage device), and other modules in the numerical controller 102 are controlled by an operating system unit (preferably a real-time OS) provided therein. The programming of the NC program b and the input of data and operation instructions a from the display / operation panel 101 are performed via the man-machine interface. The analysis unit 222 sequentially interprets the NC program b supplied via the system control unit 121, performs shape analysis, trajectory generation, and the like, and converts the NC program into an NC command. That is, the input of the numerical control device 102 is a language that describes a numerical control operation for describing all information such as a tool path and a processing condition necessary for the processing with respect to a given drawing of the workpiece. The analysis unit 222 sequentially interprets (interprets) this and converts it into an NC command c. The operation control unit 123 includes a servo mechanism such as a servo amplifier and a spindle amplifier, a servo / spindle pulse generator, and the like. Based on the NC command c supplied from the analysis unit 222, the servo mechanism (servo amplifier, spindle amplifier, etc.) , And drive-controls the machine tool 103 via the servo mechanism. That is, the machine tool 1
A control amount di such as feedback information and monitor information from the control unit 03 is input, and while reflecting these in numerical control, a servo mechanism such as a servo amplifier and a spindle amplifier is controlled to output an operation amount do to the machine tool 103. . PLC unit 1
24 activates a ladder program or the like corresponding to the NC command c and controls the operation of the machine tool 103. A signal processing program created by a ladder tool or the like is prepared in advance, a ladder program or the like corresponding to the NC command c is started, and a control amount fi such as feedback information or monitor information from the machine tool 103 is input. Then, the operation amount fo is output to the machine tool 103 while reflecting these in the signal processing. Further, the memory 125 stores processing information transmitted between the modules or information (b, c, do, di, e, fo, fi) such as an operation result output by each module for each module. Is recorded for each predetermined operation unit.
That is, for example, the NC program b, the NC command c, the operation amount do of the operation control unit 123, the control amount di to the operation control unit 123, the NC command e to the PLC unit 124, the PLC unit 12
4, a storage area is provided for each of the operation amount fo of FIG. 4 and the control amount fi to the PLC unit 124, and in each storage area, for each program unit, for each block unit having a functional unit of the NC command, Recording is performed for each unit of operation having a unity or for each sampling time of a predetermined cycle. still,
If the storage capacity of the memory 125 is limited, the F
It is desirable to record sequentially in the IFO format.

Next, the operation of the numerical controller 102 according to the present embodiment will be described. First, the operator displays /
Data and an operation instruction a are input via the operation panel 101 and the man-machine interface of the system control unit 121, and the NC program b is programmed. The created NC program b is supplied to the analysis unit 222, and is sequentially interpreted by the analysis unit 222 and converted into the NC command c. In the operation control unit 123, based on the NC command c supplied from the analysis unit 222, the servo mechanism (servo amplifier,
Command pulse to the main spindle amplifier, etc.
The operation amount do is output to 3 and drive control is performed. When the feedback control is performed, the feedback control is performed while reflecting a control amount di such as feedback information or monitor information from the machine tool 103 in the numerical control. Also, the PLC unit 124
Then, a ladder program or the like corresponding to the NC command c is started, and the operation amount fo is output to the machine tool 103 while the control amount fi such as feedback information or monitor information from the machine tool 103 is reflected in the signal processing. Control the operation. In the above operation flow, the NC program b is
The NC command c and the NC command e to the PLC unit 124 are recorded in the NC program storage area and the PLC command 124 for each block unit having a functional unit of the NC command. , The operation amount do of the operation control unit 123, the control amount di of the operation control unit 123, the operation amount fo of the PLC unit 124, and the control amount f of the PLC unit 124.
i is an operation control unit operation amount storage area, an operation control unit control amount storage area, a PLC unit operation amount storage area, and a PLC unit control amount storage area for each operation unit having a functional unity or for each sampling time of a predetermined cycle. Will be recorded. When a trouble occurs, information corresponding to each module recorded in each storage area of the memory 125 is output to the display / operation panel 101 in association with each other via the man-machine interface unit of the system control unit 121. Accordingly, the operation amount do of the operation control unit 123 at the time of occurrence of the trouble, the control amount di for the operation control unit 123, and the PLC unit 12
4 and the control amount fi to the PLC unit 124.
Can be recognized in association with the NC command or the statement of the NC program, and it is possible to immediately determine at which operation control the trouble occurred.
Further, even when a trouble or the like having a very low frequency of occurrence occurs, the operation amount do of the operation control unit 123 and the operation control unit 12
3, the control amount di for the PLC unit 124, the operation amount fo of the PLC unit 124, and the control amount fi for the PLC unit 124 are correlated with the NC command or the statement of the NC program, and are sequentially traced back (traced) in time. It is also possible to immediately determine whether the occurrence is caused by an operator's mistake or misunderstanding, a mechanical system problem, or a problem of the numerical controller 102 itself. . Further, the information stored in the memory 125 is transmitted to a higher-level information processing device (external device) 104 such as a host via a driver unit of the system control unit 121,
A debugger prepared in advance in the information processing device 104,
More detailed troubleshooting is possible with tools such as a tracer and a failure diagnosis program.

Finally, the numerical controller 102 of the present embodiment
The features and effects of the numerical control device 102 according to the present embodiment will be clarified by showing a specific example of the occurrence of a trouble and the troubleshooting for the trouble. Here, a phenomenon in which a shock occurs in the machine tool 103 during movement of the servo axis will be described as an example of a trouble. The servo axis movement is performed when the numerical control device 102 notifies the machine tool 103 of the payout movement amount per unit time. In order to solve such a case, it is necessary to isolate the problem of the numerical controller 102 or the problem of the machine tool 103. First, the movement amount per unit time is created by the operation control unit 123. The created movement amount can be referred to by the operation amount do stored in the memory 125, and by this reference, it can be determined whether or not an abnormal payout has been made. In addition, here, it is conceivable that a large movement amount is suddenly instructed to the machine tool 103 from the operation control unit 123 in the abnormal payout when the shock occurs in the machine tool 103.
Therefore, if no abnormality is found in the operation amount do stored in the memory 125, it can be said that the problem is with the machine tool 103.
In this case, by further referring to the control amount di stored in the memory 125 on the display / operation panel 101, it can be determined whether the servo motor has been normally driven according to the operation amount do. Machine tool 103
It is possible to discriminate the factor as to whether the problem is a structural problem or a servo motor problem.
On the other hand, if there is an abnormality in the manipulated variable do, it can be said that the numerical controller 102 has a problem. In this case, the data stored in the memory 125, the operation instruction a, the NC program b, and the NC are further considered from the viewpoint of investigating the reason why the operation control unit 123 has performed an abnormal payout.
By referring to the command c on the display / operation panel 101, it is possible to extract the condition of the occurrence of the phenomenon. As described above, in the numerical controller 102 according to the present embodiment, even when a short-circuit deficiency such as a shock phenomenon in the machine tool 103 occurs, information corresponding to each module is displayed on the display / operation panel 101. Since these are output in association with each other, it is easy to investigate the cause of the trouble, and early problem solving can be expected.

[0008]

As described above, according to the numerical controller of the present invention, the storage means stores the man-machine interface, the operating system, the driver, the interpreter, the servo / spindle pulse generator, and the program logic controller. The processing information transmitted between each module such as the unit or the information such as the operation result output by each module is recorded for each module for each predetermined operation unit of the module. The information corresponding to each module recorded in the storage unit is output in association with each other, or the information stored in the storage unit is transmitted to an external device via a driver unit, thereby making the internal Data is recorded for each operation unit unique to the module, and these are correlated and displayed or output. By transmitting and outputting, even if a trouble with extremely low frequency of occurrence occurs, more appropriate and more information can be obtained, enabling analysis of the cause of the trouble when trouble occurs and early recovery of the control system. A numerical control device can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a numerical control device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a conventional numerical control device.

[Explanation of symbols]

101, 201 Display / operation panel 102, 202 Numerical control device 103, 203 Machine tool 104 External device 121, 221 System control unit 122, 222 Analysis unit (interpreter) 123, 223 Operation control unit 124, 224 PLC (program logic controller) Unit 125 memory (storage means) a data or operation instruction b NC program c NC command do operation amount of operation control unit 123 di control amount to operation control unit 123 e NC command to PLC unit 124 fo operation amount of PLC unit 124 fi Control amount to PLC section 124

Claims (3)

[Claims] 1. A numerical control device for numerically controlling a machine tool or the like including modules such as a man-machine interface unit, an operating system unit, a driver unit, an interpreter unit, a servo / spindle pulse generator, and a program logic controller. Numerical control apparatus comprising storage means for recording, for each module, processing information transmitted between the modules or information such as a calculation result output from each module for each predetermined operation unit of the module. . 2. The numerical controller according to claim 1, wherein the man-machine interface unit outputs information corresponding to each module recorded in the storage unit in association with each other when a trouble occurs. . 3. The driver unit, when a trouble occurs,
3. The numerical control device according to claim 1, wherein the information stored in the storage unit is transmitted to an external device.