Multiplex communications – Communication techniques for information carried in plural... – Adaptive
Reexamination Certificate
2005-05-10
2005-05-10
Pezzlo, John (Department: 2662)
Multiplex communications
Communication techniques for information carried in plural...
Adaptive
C370S476000, C370S490000
Reexamination Certificate
active
06891850
ABSTRACT:
A highly reliable industrial control system is produced using a network running a standard serial protocol. A safety protocol is embedded within the standard serial protocol by adding to special error detecting data redundant with the protocol of the standard serial network. In addition an overarching protocol involving timing of messages is imposed to provide the necessary level of reliability in the standard serial network. This approach allows the safety protocol to be used with a wide variety of commercially available serial communication standards without modification of the media or the specialized integrated circuits used for that communication. Safety protocol may be implemented in an additional level for integrated circuits or through firmware changes in programmable aspects of the industrial controller components.
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Hall Kenwood H.
Lenner Joseph A.
Vandesteeg Kerry W.
Vasko David A.
Pezzlo John
Quarles & Brady LLP
Rockwell Automation Technologies Inc.
Speroff R. Scott
Tsegaye Saba
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