Safety communication on a single backplane

Details Safety communication on a single backplane Safety communication on a single backplane

2005-06-21

2005-06-21

Patel, Ramesh (Department: 2121)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Having protection or reliability feature

C700S021000, C700S009000, C700S080000, C700S081000, C700S082000, C709S224000, C709S249000, C710S104000, C714S004110, C714S006130

Reexamination Certificate

active

06909923

ABSTRACT:
Safety level error detection comparable to that provided by redundant wired safety relays is obtained on a backplane of a programmable logic controller or the like by a combination of error detection methods that in sum provide the requisite level of error detection required without necessitating a particular hardware requirement or duplicative message transmissions.

REFERENCES:
patent: 5099449 (1992-03-01), Dombrosky et al.
patent: 6154683 (2000-11-01), Kessler et al.
patent: 6549034 (2003-04-01), Pietrzyk et al.
patent: 6555935 (2003-04-01), Maskovyak et al.
patent: 6759767 (2004-07-01), Maskovyak et al.
patent: 000883043 (1998-09-01), None

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