Title:
NUMERICAL CONTROL UNIT
Document Type and Number:
WIPO Patent Application WO/1998/044397
Kind Code:
A1
Abstract:
A numerical control unit which can accurately judge whether or not parameters for keeping the safety of a machine are read in the RAM properly. A first parameter set for a CPU (8) for CNC and a second parameter set for a CPU (2) for monitoring are stored in an SRAM (9) (the contents of the first and the second parameter set being the same). The first parameter set is loaded in a RAM (7) of the CPU (8) for CNC and the second parameter set is loaded in a RAM (1) of the CPU (2) for monitoring, both by an initialization process. Whether or not the first parameter set stored in the RAM (7) and the second parameter set stored in the RAM (1) agree with each other is judged by each of the CPU (8) for CNC and the CPU (2) for monitoring. Only when their agreement is confirmed, a system operation program is activated.
Inventors:
MURAOKA YUTAKA (JP)
KOIKE TAKESHI (JP)
KOIKE TAKESHI (JP)
Application Number:
PCT/JP1998/001412
Publication Date:
October 08, 1998
Filing Date:
March 27, 1998
Export Citation:
Assignee:
FANUC LTD (JP)
MURAOKA YUTAKA (JP)
KOIKE TAKESHI (JP)
MURAOKA YUTAKA (JP)
KOIKE TAKESHI (JP)
International Classes:
G05B19/18; G05B19/406; G05B19/408; G05B19/414; (IPC1-7): G05B19/406; G05B19/18
Foreign References:
| JPH0232408A | 1990-02-02 | |||
| JPH05177503A | 1993-07-20 | |||
| JPS62298810A | 1987-12-25 | |||
| JPH0561527A | 1993-03-12 | |||
| JPH04174007A | 1992-06-22 |
Attorney, Agent or Firm:
Takemoto, Shoji (23-10 Toranomon 1-chom, Minato-ku Tokyo, JP)
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