WO1990002366A1

WO1990002366A1 - System for diagnosing cnc

Info

Publication number: WO1990002366A1
Application number: PCT/JP1989/000838
Authority: WO
Inventors: Jiro Kinoshita
Original assignee: Fanuc Ltd
Priority date: 1988-08-29
Filing date: 1989-08-16
Publication date: 1990-03-08
Also published as: JPH0262606A

Abstract

A CNC diagnosing system for diagnosing defect of a numerical controller (CNC). In case a defect generates in any one of the numerical controllers (20, 30 and 40), a host computer (11) loads down onto the numerical controller a diagnosis program for diagnosing defect, and executes the diagnosis of defect. Required data are then transferred from the numerical controller to the host computer (11). Therefore, a service engineer can diagnose the defect on the numerical controller based on data displayed on the screen of the host computer (11).

Description

Specification

C NC diagnostic method

The present invention relates to a remote diagnosis method of a CNC for diagnosing failure of a numerical control device (CNC), and more particularly to a diagnosis method of a CNC which performs a diagnosis by connecting a numerical control device and a host computer via a network. . Background technology

Numerical controllers have become more complex and sophisticated with the development of semiconductor technology and software technology, including microprocessors. The failure rate of such numerical control devices has been improved with the improvement of reliability technology, but when a failure occurs, it becomes extremely difficult to identify the cause. '

Many numerical control machines are installed in the field, and these numerical control machines are connected to the host computer in the field, and the data is sent from the host computer. It has been transferred to the numerical controller.

However, when a failure occurs in the numerical control device, the service engineer goes to the corresponding numerical control device, examines the content of the failure, and performs repair. On the other hand, numerical controllers are becoming more complicated, and it is often difficult to find faults easily, and service engineers often use numerical controllers and service in factories. Less likely to reciprocate between centers, etc.

The present invention has been made in view of such a point, and an object of the present invention is to provide a diagnostic method of CNC by connecting a numerical controller and a host computer via a network.

In the present invention, in order to solve the above problems,

According to the CNC diagnosis method for diagnosing failure of a numerical control device (CNC), a host computer and a numerical control device are connected via a network, and a failure diagnosis program is provided by the host computer. The present invention provides a CNC diagnostic method characterized in that the numerical control device is downloaded to the numerical control device and a failure diagnosis of the numerical control device is performed.

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

The service engineer diagnoses the failure of the numerical controller from the data displayed on the host computer. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of a CNC diagnostic method according to the present invention. FIG. 2 is a block diagram of a numerical controller according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of the CNC diagnostic method according to the present invention. In the figure, 10 is a host computer section, 11 is a host computer, and 12 is a communication port. 5 1 is modeled.

Numerals 20, 30, and 40 are numerical control units (CNCs) coupled to the numerical control machine, and coupled to modems 52, 53, and 54, respectively, to provide communication lines 55, 56, and 54. It is connected to the modem 51 of the host computer via 57. In the figure, for the sake of simplicity, three sets of numerical controllers are shown, but in fact, a large number of numerical controllers are combined.

The network between the host computer and the numerical controller uses the MAP (ManufactuirngAutomationdProtocoll) which is currently in use. The communication lines 55, 56, and 57 that make up the network use wire, and coaxial cables use optical fibers. For the modem 51 and the like, a combined machine may be used.

Here, when a failure occurs in the numerical control unit (CNC) 20 or 30 at 40, a failure diagnosis program is downloaded from the host computer 10 to the corresponding numerical control unit. Then, data required for diagnosis is transferred to the host computer.

These data are selected as necessary from the data that can be displayed on the screen of the numerical controller. Specifically, the position and coordinate values of each axis of the numerical controller are determined by the contents of the RAM, input / output states, etc.

The service engineer transfers these data to the host computer screen. You can request a special data transfer if necessary.

FIG. 2 shows a block diagram of the numerical control device of the present invention. In the figure, reference numeral 20 denotes a numerical controller (CNC), and reference numeral 61 denotes a processor that controls the numerical controller. 62 is R 0 M in which the system program is stored, and 63 is R AM in which the system program is loaded and other data is stored. Reference numeral 64a denotes an operation key, reference numeral 64b denotes a display device, and reference numeral 65 denotes a CM0S constituting a battery-packed nonvolatile memory.

66 a is a PMC (programmable machine 'controller) built in the numerical controller 20 and controls the machine side with a sequence program created in ladder format. 6 6b is obtained from the IZO unit, and the power board on the machine side is an interface for input and output to the operation panel.

Reference numeral 67 denotes a processor for failure diagnosis. Reference numeral 68 denotes a RAM for storing a failure diagnosis program. At the time of failure diagnosis, the processor 67 is used in accordance with the diagnostic program stored in the RAM 68. Perform a diagnosis. This is because, when a failure occurs, the failure cause may be found in the processor 63 or the RAM 63 or the like, and therefore, a processor and a RAM dedicated to failure diagnosis are provided. 69 is a communication port, receives a diagnostic program, and converts it into an internal signal. 52 is a modem, and 55 and 56 are communication lines.

71 to 75 are axis control circuits for controlling the position of each axis. The servo amplifiers 81 to 85 drive the servo motors 91 to 95. As described above, according to the present invention, the host computer and the numerical control device are connected to each other via a network to perform fault diagnosis. Diagnosis can be performed, failure recovery time is reduced, and cost is reduced.

Claims

The scope of the claims

1. Diagnosis of failure of numerical control unit (CNC)

A host computer and a numerical control device are connected via a network, and the host computer and the failure diagnosis program are downloaded to the numerical control device;

A CNC diagnosis method for performing a failure diagnosis of the numerical controller.

2. The CNC diagnostic system according to claim 1, wherein the S network is composed of MAP (ManufactuT AuRing AuTomiotiOnProtoColl).

3. The CNC diagnosis method according to claim 1, wherein the failure diagnosis program is downloaded to a failure diagnosis RAM and executed by a failure diagnosis processor.