JPH0262606A - Cnc diagnosing system - Google Patents

Abstract

PURPOSE:To enable a service engineer to diagnose the trouble in a control room, etc., of a plant by connecting a host computer to a numerical controller via a network and down-loading a trouble diagnosing program into the numerical controller from the host computer to diagnose the trouble of the numerical controller. CONSTITUTION:When the numerical controllers 20-40 have troubles, the host computer 10 down-loads a trouble diagnosing program into the corresponding numerical controller. Then the data necessary for diagnosis are transferred to the computer 10. A service engineer confirms those data on the screen of the computer 10 to diagnose the trouble and requests the transfer of special data as necessary.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a CN system for diagnosing failures in numerical control equipment (CNC).
The present invention relates to a CNC remote diagnosis method, and particularly relates to a CNC diagnosis method in which a numerical control device and a host computer are connected via a network for diagnosis.

[Conventional technology]

Numerical control devices have become more complex and sophisticated due to the development of semiconductor technology, including microprocessors, and software technology. Although the failure rate of such numerical control devices has been improved by improvements in reliability technology, once a failure occurs, it is extremely difficult to determine its cause.

On the other hand, a large number of numerically controlled machine tools have been introduced into a processing factory, and these numerically controlled machine tools are connected to a host computer in the factory, and machining data etc. are transferred from the host computer to the numerical control device.

[Problem to be solved by the invention]

However, when a failure occurs in a numerical control device, a service engineer goes to the relevant numerical control device, investigates the nature of the failure, and repairs it. On the other hand, as numerical control devices are becoming more complex, it is often difficult to easily detect failures, and service engineers often have to go back and forth between numerical control devices and service centers within factories. There are many cases.

The present invention has been made in view of these points, and it is an object of the present invention to provide a CNC diagnostic method that performs diagnosis by connecting a numerical control device and a host computer via a network.

A CNC diagnostic method, characterized in that a host computer and a numerical control device are connected via a network, a fault diagnosis program is downloaded from the host computer to the numerical control device, and a fault diagnosis of the numerical control device is executed. is provided.

[Effect]

When a failure occurs in the numerical control device, the host computer downloads a diagnostic program for failure diagnosis to the numerical control device, executes the failure diagnosis, and transfers necessary data to the host computer.

The service engineer diagnoses the failure of the numerical control device from the data displayed on the host computer.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a numerical control device (
DESCRIPTION OF THE PREFERRED EMBODIMENTS [Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of an embodiment of the CNC diagnosis method of the present invention. In the figure, 10 is a host computer section,
11 is a host computer, and 12 is a communication boat. 51 is a modem.

20.30 and 40 are numerical control units (CNC) coupled to numerically controlled machine tools, each with a modem 52.5
3 and 54, and is connected to the modem 51 of the host computer via communication lines 55, 56, and 57. In the figure, three numerical control devices are shown for simplicity, but in reality, a larger number of numerical control devices are combined.

The network between these host computers and numerical control devices is based on MAP (Manufac), which is currently in use.
turing automation.

n Protocol) is used. For the communication lines 55, 56 and 57 that make up the network, pair wires, coaxial cables, optical fibers, or the like are used. A coupler may be used as the modem 51 or the like.

Here numerical control device (CNC) 20.30 or 40
When a failure occurs, a failure diagnosis program is downloaded from the host computer 10 to the corresponding numerical control device, and data necessary for diagnosis is transferred to the host computer.

These data are selected as necessary from data that can be displayed on the screen of the device (numerical value side <n). Specifically, the information includes the position of each axis of the numerical control device, coordinate values, contents of RAM, input/output status, etc.

The service engineer can check this data on the host computer screen, perform fault diagnosis, and request the transfer of special data if necessary.

FIG. 2 shows a block diagram of the numerical control device of the present invention. In the figure, 20 is a numerical control device (CNC), and 61
is a processor that controls the numerical control device. A ROM 62 stores a system program, and a RAM 63 loads the system program and stores other data. 64a is an operation key, 64b is a display device, and 65 is a CMO 3 constituting a battery-backed nonvolatile memory.

66a is a PMC (programmable machine controller) built into the numerical control device 20, and controls the machine side using a sequence program created in a ladder format. Reference numeral 66b is an I10 unit, which is an input/output interface to a power panel or operation panel on the machine side.

67 is a processor for fault diagnosis, and 68 is a RAM that stores a fault diagnosis program.
The processor 67 performs diagnosis using the diagnostic program stored in the AM6B. This is because when a failure occurs, the cause of the failure may be in the processor 61 or the RAM 63, so a processor and RAM dedicated to failure diagnosis are provided.

69 is a communication port, which receives the diagnostic program,
Convert to internal signal. 52 is a modem, and 55 and 56 are communication lines.

Axis control circuits 71 to 75 control the position of each axis. 81 to 85 are servo amplifiers, and servo motor 91
~95 is driven.

〔Effect of the invention〕

As explained above, in the present invention, a host computer and a numerical control device are connected through a network to perform failure diagnosis, so a service engineer can perform the diagnosis in a factory control room, etc., and the time required to recover from a failure is time is shortened and costs are also reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the CNC diagnosis method of the present invention, and FIG. 2 is a block diagram of a numerical control device of the present invention. 0--1--・--1-～--Host computer section 0・
・−・−・−・−Numerical controller 0・・・−・−・・−・−・−Numerical controller 0・−・−
・−・−・−Numerical control device 4・・−・・−・−・−Modem 7−・・−・・・−Communication line 1−−−−−・−・−・−・−Processor 67・・・・・・
---1-----Diagnostic processor 68--
・−・−RAM 69・−・・−・・−1−−−−−Communication port patent applicant FANUC Co., Ltd. agent Patent attorney Takeshi Hattori Figure 1

Claims (3)

[Claims] (1) CNC that diagnoses failures in numerical control equipment (CNC)
In the diagnosis method, a host computer and a numerical control device are connected via a network, a fault diagnosis program is downloaded from the host computer to the numerical control device, and a fault diagnosis of the numerical control device is executed. CNC diagnostic method. (2) The network is a MAP (Manufacturer)
ringAutomationProtocol) according to claim 1.
NC diagnosis method. (3) C according to claim 1, wherein the fault diagnosis program is downloaded to a RAM for fault diagnosis and executed by a processor for fault diagnosis.
NC diagnosis method.