Process control interface system having triply redundant remote field units
A process control interface system (10) having a rietwork of distributed triply redundant input/output field computer units (12). The system includes a plurality of self-contained remotely located triply redundant field computer units (12) connected to decision making redundant process control compu...
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| creator | LOWELL V. THOMAS ROBERT J. HOZESKA JOSEPH SHEEHAN ROBERT S. HOY TIMOTHY J. GRAI DEAN W. GAUDREAU GREGORY J. GAVIT DONALD J. GRINWIS ROBERT S. GLASER G. PAUL FERNANDEZ |
| description | A process control interface system (10) having a rietwork of distributed triply redundant input/output field computer units (12). The system includes a plurality of self-contained remotely located triply redundant field computer units (12) connected to decision making redundant process control computers (14) through a bi-directional communication network having at least two concurrently active communication channels (46, 48). Each of the field computer units include a set of at least three redundant field computers (92, 94, 96) for arbitrating both input and output signals. The field computer units also include individual abort circuits (510, 606) for each output signal to be transmitted to a device (84, 86) which affects the operation of the physical process. These abort circuits effectively enforce the output value signals arbitrated independently through each of the three redundant field computers using a voting procedure. |
| format | Patent |
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HOZESKA ; JOSEPH SHEEHAN ; ROBERT S. HOY ; TIMOTHY J. GRAI ; DEAN W. GAUDREAU ; GREGORY J. GAVIT ; DONALD J. GRINWIS ; ROBERT S. GLASER ; G. PAUL FERNANDEZ</creatorcontrib><description>A process control interface system (10) having a rietwork of distributed triply redundant input/output field computer units (12). The system includes a plurality of self-contained remotely located triply redundant field computer units (12) connected to decision making redundant process control computers (14) through a bi-directional communication network having at least two concurrently active communication channels (46, 48). Each of the field computer units include a set of at least three redundant field computers (92, 94, 96) for arbitrating both input and output signals. The field computer units also include individual abort circuits (510, 606) for each output signal to be transmitted to a device (84, 86) which affects the operation of the physical process. 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| subjects | CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING |
| title | Process control interface system having triply redundant remote field units |
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