1996-11-20
1998-11-03
Beausoliel, Jr., Robert W.
395182, 395 22, 39518319, G06F 1100
Patent
active
058321950
ABSTRACT:
A method and apparatus to be used with a peer-to-peer network including a plurality of separate controllers which can control each other, the method and apparatus to be used to determine when a fault conditions occurs when one controller which has controlled a different controller is rendered incapable of network communication. In the present invention, each individual controller includes a control list which tracks all of the other controllers that have controlled the individual controller. When one of the controllers on a control list is rendered incapable of communicating with the individual controller, the controller that is incapable of communicating is cleared from the control list associated with the individual controller and the tools associated with the individual controller are forced into safe fault operation until controlled by an other controller.
REFERENCES:
patent: 4610013 (1986-09-01), Long et al.
patent: 5390326 (1995-02-01), Shah
patent: 5461608 (1995-10-01), Yoshiyama
patent: 5483520 (1996-01-01), Eychenne et al.
patent: 5483535 (1996-01-01), McMillen et al.
patent: 5544332 (1996-08-01), Chen
Braun Scott D.
Rustad James S.
Siegler David W.
Allen-Bradley Company LLC
Baderman Scott T.
Beausoliel, Jr. Robert W.
Horn John J.
Jaskolski Michael A.
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