Boots – shoes – and leggings
Patent
1997-06-13
1999-10-12
Grant, William
Boots, shoes, and leggings
364133, 364134, 364186, 364187, G05B 1500
Patent
active
059663014
ABSTRACT:
An industrial controller provides a primary controller and a redundant secondary controller and allows switchover between the controllers in the event of a failure in the primary controller. The process of qualification of the secondary controller in which its programming is made to match the primary controller may be inhibited to permit the secondary controller to maintain a clean version of an upgraded program executing on the primary controller. The clean program may be reverted to in the event an upgrading of the program in the primary controller is unsuccessful. Switchover is permitted even though the qualification of the secondary controller is not enabled.
REFERENCES:
patent: 5136498 (1992-08-01), Mclaughlin et al.
patent: 5142470 (1992-08-01), Bristow et al.
patent: 5313386 (1994-05-01), Cook et al.
patent: 5515501 (1996-05-01), Laberge et al.
patent: 5530643 (1996-06-01), Hodorowski
Bittorf Bradley J.
Cook William B.
Flood Mark A.
Richter Steven P.
Taylor Mark E.
Allen-Bradley Company LLC
Baxter Keith M.
Grant William
Horn John J.
Miller John M.
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