Distributed control system having central control providing oper

Details Distributed control system having central control providing oper Distributed control system having central control providing oper

1997-01-09

1997-10-28

Lee, Thomas C.

Telephonic communications

Special services

Anonymous party

39520001, 379 58, A06F 1300

Patent

active

056824769

ABSTRACT:
An apparatus provides redundant wireless to access field devices in a distributed control system having primary access to the field devices provided by hard-wired media that couples the field devices to the control room. The field devices are coupled to a Fieldbus control network. In a first embodiment, each field device is provided with a wireless Fieldbus port that is accessible by a wireless terminal. In a second embodiment, each Fieldbus control network is provided with a field module having a wireless Fieldbus port that allows all devices connected to the Fieldbus control network to be accessed by a wireless terminal. In a third embodiment, an H2-to-H1 Fieldbus bridge (which may service a plurality of H1 control networks) is provided with a wireless Fieldbus port that allows all Fieldbus devices connected to H1 control networks serviced by the H2-to-H1 bridge to be accessed by a wireless handheld unit of a wireless terminal. The redundant wireless access provided by the present invention allows a control room operator to access field devices in the event of failure or unavailability of the hard-wired media that provides primary access to the field devices.

REFERENCES:
patent: 4726017 (1988-02-01), Krum et al.
patent: 4729091 (1988-03-01), Freeman et al.
patent: 4916441 (1990-04-01), Gombrich
patent: 5099444 (1992-03-01), Wilson et al.
patent: 5142550 (1992-08-01), Tymes
patent: 5239662 (1993-08-01), Danielson et al.
patent: 5374231 (1994-12-01), Obrist
patent: 5400246 (1995-03-01), Wilson et al.
patent: 5451923 (1995-09-01), Seberger et al.
patent: 5493569 (1996-02-01), Buchholz et al.
patent: 5495482 (1996-02-01), White et al.
patent: 5495484 (1996-02-01), Self et al.

Affiliated with

Also associated with

Rating

Distributed control system having central control providing oper does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Distributed control system having central control providing oper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distributed control system having central control providing oper will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1031572