Process control system with improved fault isolation

Details Process control system with improved fault isolation Process control system with improved fault isolation

1982-08-17

1985-07-02

Atkinson, Charles E.

Excavating

364184, 364186, G06F 922, G06F 1100

Patent

active

045272719

ABSTRACT:
A process control system includes redundant digital controllers and a plurality of input/output (I/O) modules for interfacing with remote field sensors and actuators. Bi-directional communication between controllers and I/O modules is achieved by a parallel-wired, process I/O bus. Failures within the system, including the bus structure itself, that continually keep the bus active (i.e., in a low state) are isolated by a combination of software diagnostic routines for performing bus checkout and a unique quick disconnect feature that readily isolates the fault condition first between the I/O module nest area and the controllers, then, if necessary, to individual I/O modules. During fault isolation procedures, individual I/O modules may be disconnected from the bus while the values of field signals are simultaneously maintained to provide minimum process upset.

REFERENCES:
patent: 3997879 (1976-12-01), Markley et al.
patent: 4107253 (1978-08-01), Borg et al.
patent: 4118792 (1978-10-01), Struger et al.
patent: 4195769 (1980-04-01), Elias et al.
patent: 4322847 (1982-03-01), Dodge et al.
patent: 4351023 (1983-09-01), Richer

Affiliated with

Also associated with

Rating

Process control system with improved fault isolation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process control system with improved fault isolation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process control system with improved fault isolation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-385578