Input/output device with configuration, fault isolation and redundant fault assist functionality
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United States of America Patent
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Aug 13, 2013
Grant Date -
Jan 19, 2012
app pub date -
Sep 23, 2011
filing date -
May 31, 2001
priority date (Note) -
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Abstract
A process control system is provided having a plurality of I/O devices in communication using a bus. A primary redundant I/O device and a secondary redundant I/O device are coupled to the bus, where the secondary redundant I/O device is programmed to detect a primary redundant I/O device fault. The secondary redundant I/O device, upon detecting the primary redundant I/O device fault, publishes a primary redundant I/O device fault message on the bus. The controller may deactivate the primary redundant I/O device and activate the secondary redundant I/O device responsive to the primary redundant I/O device fault message.
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