Safety master

Details Safety master Safety master

2011-04-26

2011-04-26

Decady, Albert (Department: 2121)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Plural processors

C709S208000, C710S110000, C712S031000

Reexamination Certificate

active

07933663

ABSTRACT:
A safety master configured to communicate with a plurality of safety slaves over a safety field network or with a plurality of safety local I/O units connected by a safety back plane bus of the safety master, wherein each of the plurality of safety slaves and safety local I/O units allow connection to safety I/O devices in a plurality of cell equipment, and wherein the safety master receives a status signal indicating a “safe state” or an “unsafe state” related to cell equipment from each of the corresponding plurality of safety slaves or safety local I/O units, and controls operation/stop of cell equipment by executing an interlock operation program with the received status signal as an input to output an operation instruction signal.

REFERENCES:
patent: 6618628 (2003-09-01), Davlin et al.
patent: 6711445 (2004-03-01), Heath et al.
patent: 6952618 (2005-10-01), Davlin et al.
patent: 7254452 (2007-08-01), Davlin et al.
patent: 7634320 (2009-12-01), Sakurai
patent: 7774074 (2010-08-01), Davlin et al.
patent: 11-242507 (1999-09-01), None

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