Sequence of events system using a redundant analog I/O board sys

Details Sequence of events system using a redundant analog I/O board sys Sequence of events system using a redundant analog I/O board sys

1994-09-23

1996-02-13

Beausoliel, Jr., Robert W.

39518210, G06F 1120

Patent

active

054917921

ABSTRACT:
In a sequence-of-events system for a distributed process control system, unfiltered changes in process element status are initially stored at each remote site along with a time tag. Each remote site has an I/O manager board to which are connected a number of individual I/O boards. Each I/O board in turn has connected to it process signal inputs from a number of process elements (e.g., 16), which can be in an "on" or "off" state. Each I/O board includes a change-of-state detector to which the process signal inputs are coupled. The change-of-state detector detects a change of state of any process input and generates an interrupt signal, which is coupled to a microprocessor also located on the I/O board. The microprocessor reads the status of all the process element inputs coupled to the scanner and also the output of a local clock on the I/O board. The microprocessor records in a sequence-of-events memory on the I/O manager board the status of all process signal inputs to the change-of-state detector at the time of a change in any input, along with the relative time at which the change occurred.

REFERENCES:
patent: 4303973 (1981-12-01), Williamson et al.
patent: 4304001 (1981-12-01), Cope
patent: 4500951 (1985-02-01), Sugimoto et al.
patent: 4667323 (1987-05-01), Engdahl et al.
patent: 4680581 (1987-07-01), Kozlik et al.
patent: 4775976 (1988-10-01), Yokoyama
patent: 4847837 (1989-07-01), Morales et al.
patent: 4890222 (1989-12-01), Kirk
patent: 4939753 (1990-07-01), Olson
patent: 5008805 (1991-04-01), Fiebig et al.
patent: 5012468 (1991-04-01), Siegel et al.
patent: 5016244 (1991-05-01), Massey et al.
patent: 5185708 (1993-02-01), Hall et al.
patent: 5225975 (1993-07-01), Gates et al.
patent: 5251302 (1993-10-01), Weigl et al.
patent: 5253252 (1993-10-01), Tobol
patent: 5268907 (1993-12-01), Suzuki et al.
patent: 5270917 (1993-12-01), Kimura
patent: 5272702 (1993-12-01), Snowbarger et al.
patent: 5289469 (1994-02-01), Tanaka
patent: 5319574 (1994-06-01), Ikeda

Affiliated with

Also associated with

Rating

Sequence of events system using a redundant analog I/O board sys does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sequence of events system using a redundant analog I/O board sys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sequence of events system using a redundant analog I/O board sys will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-246220