Safety network using phantom address information

Details Safety network using phantom address information Safety network using phantom address information

2006-07-11

2006-07-11

Lamarre, Guy (Department: 2138)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

Reexamination Certificate

active

07076715

ABSTRACT:
Messages in a high reliability industrial control system are associated with safety addresses preventing errors caused by misdirected messages. The safety address, however, is not transmitted with the message, but instead only the data of the message and an error detecting code based on a combination of the data and the safety address is sent. At a receiving node, an expected safety address is concatenated to the data of the message and the transmitted error correcting code compared against this combination to confirm proper addressing of the message. Network capacity is thus improved.

REFERENCES:
patent: 4932023 (1990-06-01), Geyer et al.
patent: 6598454 (2003-07-01), Brazier et al.
patent: 2003/0134591 (2003-07-01), Roberts et al.
patent: 2003/0147168 (2003-08-01), Galbraith et al.
IBM International Technical Support Organization: “TCP/IP Tutorial and Technical Overview”, (IBM Redbooks) 7th Edition, Aug. 2001, Chapter 21.2.4.

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