Boots – shoes – and leggings
Patent
1982-03-05
1985-04-16
Ruggiero, Joseph F.
Boots, shoes, and leggings
364131, 364187, 364474, 371 9, G06F 1546, G06F 1116
Patent
active
045119821
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
BACKGROUND OF THE INVENTION
This invention relates to a numerical control device which, in addition to a main processor which executes data processing for numerical control, is equipped with a separate service processor for system diagnosis.
A numerical control device (referred to as an NC device hereinafter) generally is provided with various diagnostic functions for precluding and detecting malfunctions due to hardware failures or the like, and is constructed so that diagnosis of, for example, an NC control panel abnormality or hardware failure, can be executed on-line and off-line. Conventionally, however, such diagnosis is performed by having the main processor, which carries out the data processing for numerical control, execute a diagnostic program which has been stored in the main memory. This has a disadvantage in that it becomes impossible to carry out the malfunction diagnosis when the main processor fails.
SUMMARY OF THE INVENTION
The present invention seeks to improve upon the disadvantages encountered in the prior art. The object of the present invention is to make diagnosis possible even in the event of, for example, a failure in the main processor, by providing a service processor for system diagnosis that is separate from the main processor which executes the data processing for numerical control, and by arranging it so that system diagnosis can be carried out independently of the main processor.
Specifically, in the present invention a main bus of an NC device is provided with a switching circuit, which NC device includes, connected to the switching circuit, a main processor for carrying out numerical control and for diagnosing failures in hardware and the like, and a main memory into which the diagnostic program for the main processor is written in addition to the program for numerical control. Also included are a tape reader, an NC control panel, a position control circuit and the like, and a service processor for diagnosing failures all connected to the switching circuit. The service processor for failure diagnosis has, with respect to the peripheral circuitry connected to the main bus of the main processor, a control capacity substantially equivalent to that of the main processor, and additionally possesses a function which stops the main processor from executing an instruction. Furthermore, the service processor is provided with a service memory into which the diagnostic program for the service processor is written. If for some reason an abnormality should develop in the main processor and make it impossible for the main processor to execute a failure diagnosis operation, the service processor is connected to the main bus by means of the bus switching circuit and the execution of instructions by the main processor is halted, whereupon the service processor diagnoses failures in the NC device through a method which is the same as that followed by the main processor.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram showing the principal portions of a device embodying the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
An embodiment of the present invention will now be described in conjunction with the accompanying drawing while making a comparison with a prior-art device in order to describe the present invention in greater detail.
FIG. 1 is a block diagram showing the principal portions of a device embodying the present invention, in which numeral 1 denotes a main processor, 2 a bus switching circuit, 3 a main bus, 4 a main memory, 4a a diagnostic program for the main processor written into the main memory 4, 5 a tape reader, 6 an NC control panel, 7a through 7n position control circuits, 8 a service processor, 9 a service processor bus, 10 a service memory, 10a a diagnostic program for the service processor written into the service memory 10, 11 a control panel, and 12 a display device such as a CRT.
In FIG. 1, the main processor 1 carries out data processing for numerical control. Specifically, input data from the tape reader 5 connected
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patent: 3636331 (1972-01-01), Amrehn
patent: 3786430 (1974-01-01), Hajdu et al.
patent: 4032757 (1977-06-01), Eccles
patent: 4117317 (1978-09-01), Dooley, Jr. et al.
patent: 4281379 (1981-07-01), Austin
patent: 4351023 (1982-09-01), Richer
Fujitsu Fanuc Limited
Ruggiero Joseph F.
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