Safety controller providing rapid recovery of safety program...

Details Safety controller providing rapid recovery of safety program... Safety controller providing rapid recovery of safety program...

2006-04-11

2006-04-11

Patel, Ramesh (Department: 2121)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Sequential or selective

C700S018000, C700S023000, C700S079000, C700S087000, C700S088000, C700S086000, C713S168000, C713S173000, C713S175000, C713S180000, C717S114000, C717S127000, C717S168000, C717S172000, C717S173000

Reexamination Certificate

active

07027880

ABSTRACT:
Re-certification of a control program loaded in a safety controller is avoided through the use of a digital snapshot and digital signature, the snapshot providing a rapidly loadable memory image file and the signature providing a confirmation that the file loaded matches a previously certified copy so as to avoid the need for time consuming re-certification.

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