Invention Application
- Patent Title: TWO-WIRE PROCESS CONTROL LOOP DIAGNOSTICS
- Patent Title (中): 双线工艺控制环路诊断
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Application No.: PCT/US2007/021242Application Date: 2007-10-03
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Publication No.: WO2008045258A2Publication Date: 2008-04-17
- Inventor: HUISENGA, Garrie, D. , LONGSDORF, Randy, J. , LATTIMER, Donald, R.
- Applicant: ROSEMOUNT INC. , HUISENGA, Garrie, D. , LONGSDORF, Randy, J. , LATTIMER, Donald, R.
- Applicant Address: 12001 Technology Drive Eden Prairie, MN 55344 US
- Assignee: ROSEMOUNT INC.,HUISENGA, Garrie, D.,LONGSDORF, Randy, J.,LATTIMER, Donald, R.
- Current Assignee: ROSEMOUNT INC.,HUISENGA, Garrie, D.,LONGSDORF, Randy, J.,LATTIMER, Donald, R.
- Current Assignee Address: 12001 Technology Drive Eden Prairie, MN 55344 US
- Agency: CHAMPLIN, Judson, K. et al.
- Priority: US11/543,349 20061005
- Main IPC: H04L1/24
- IPC: H04L1/24
Abstract:
A diagnostic device (50) for coupling to a process control loop (18) includes digital communication circuitry (52) configured to receive a digital communication signal from the process control loop (18). The digital communication signal is a digitally modulated analog signal on the process control loop (18) which is modulated to a plurality of discrete analog signal levels representative of digital values. Diagnostic circuitry (54) diagnoses operation of the process control loop (18) which may include field devices of the process control loop based upon the digitally modulated analog signal.
Information query
