Method for intercontroller communications in a safety instrumented system or a process control system
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United States of America Patent
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Jan 4, 2011
Issued Date -
N/A
app pub date -
Sep 29, 2006
filing date -
Jan 28, 2003
priority date (Note) -
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Abstract
The claimed system provides an I/O card that is used to interface two process controllers over a communication line that is separate from a primary communication line connecting the two process controllers to a workstation. The process controllers can access the I/O cards in a similar manner to I/O cards used to connect to field devices. In this manner, the physical hardware and software architecture does not need to be modified for inter-controller communications. Inter-controller communications can be programmed as general I/O communication.
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