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특허 상세정보

Local device and process diagnostics in a process control network having distributed control functions

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G05B-019/418   
미국특허분류(USC) 702/182 ; 364/138 ; 364/140 ; 364/188
출원번호 US-0167766 (1998-10-07)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Marshall, O'Toole, Gerstein, Murray & Borun
인용정보 피인용 횟수 : 180  인용 특허 : 29
초록

A field device for use in a process control network having a plurality of devices communicatively coupled by a two-wire, all-digital communication bus includes a connector that connects the field device to the two-wire, all-digital bus to enable all-digital communication over the bus, a memory that stores a diagnostic test routine having a series of device or process diagnostic test instructions, and a controller that performs the device or process diagnostic test instructions stored in the memory to implement a device or process diagnostic test using th...

대표
청구항

[ What is claimed is:] [1.] A field device for use in a process control system including a plurality of field devices mutually coupled by a two-wire, digital, powered bus, the bus supplying a field device control signal to the field device, the field device comprising:a pneumatically operated fluid control valve having an actuator connected to a pneumatic pressure line, wherein said actuator is adapted to cause the fluid control valve to move to a position ranging from an open position to a closed position;a position sensor coupled to the fluid control v...

이 특허에 인용된 특허 (29)

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