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    PROCESS VARIABLE TRANSMITTER WITH TWO-WIRE PROCESS CONTROL LOOP DIAGNOSTICS
    1.
    发明申请
    PROCESS VARIABLE TRANSMITTER WITH TWO-WIRE PROCESS CONTROL LOOP DIAGNOSTICS 审中-公开

    公开(公告)号：WO2011005938A3

    公开(公告)日：2011-01-13

    申请号：PCT/US2010/041338

    申请日：2010-07-08

    Applicant: ROSEMOUNT INC. ,  LECUYER, Gregory, J. ,  WEHRS, David, L. ,  LO, Jessica ,  MCCOY, Steven, J. ,  WESTFIELD, Brian, L.

    Inventor： LECUYER, Gregory, J. ,  WEHRS, David, L. ,  LO, Jessica ,  MCCOY, Steven, J. ,  WESTFIELD, Brian, L.

    IPC: G01D21/00 ,  G05B19/042 ,  G08C19/02 ,  G05B23/02

    Abstract: A two-wire process variable transmitter (12) for use in an industrial process, including a process variable sensor (14) configured to sense a process variable of a fluid of the industrial process. Output circuitry (36) is configured to provide an output on a two-wire process control loop (18) which is related to the sensed process variable. Loop current measurement circuitry (36) measures a loop current flowing through the two-wire process control loop (18) and terminal voltage measurement circuitry (36) measures a voltage related to a terminal voltage of the process variable transmitter (12). The terminal voltage can be a voltage measured across an electrical connection of the two-wire process variable transmitter (12) to the two-wire process control loop (18). Input circuitry (36) is configured to receive a diagnostic command from the two-wire process control loop (18). A microprocessor (30) configured to perform loop diagnostics on the two-wire process control loop (18) based upon the measured loop current and terminal voltage in response to receipt of a diagnostic command from the two-wire process control loop (18).

    PROCESS VARIABLE TRANSMITTER WITH TWO-WIRE PROCESS CONTROL LOOP DIAGNOSTICS
    2.
    发明公开
    PROCESS VARIABLE TRANSMITTER WITH TWO-WIRE PROCESS CONTROL LOOP DIAGNOSTICS 审中-公开
    PROZESSVERNDNDERLICHER SENDER MIT ZWEIDRAHT-PROZESSSTEUERKREISDIAGNOSTIK

    公开(公告)号：EP2452163A2

    公开(公告)日：2012-05-16

    申请号：EP10736901.9

    申请日：2010-07-08

    Applicant: Rosemount, Inc.

    Inventor： LECUYER, Gregory, J. ,  WEHRS, David, L. ,  LO, Jessica ,  MCCOY, Steven, J. ,  WESTFIELD, Brian, L.

    IPC: G01D18/00

    CPC classification number: G01D21/00 ,  G05B19/0423 ,  G05B2219/24069

    Abstract: A two-wire process variable transmitter for use in an industrial process, including a process variable sensor configured to sense a process variable of a fluid of the industrial process. Output circuitry is configured to provide an output on a two-wire process control loop which is related to the sensed process variable. Loop current measurement circuitry measures a loop current flowing through the two-wire process control loop and terminal voltage measurement circuitry measures a voltage related to a terminal voltage of the process variable transmitter. The terminal voltage can be a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. Input circuitry is configured to receive a diagnostic command from the two-wire process control loop. A microprocessor configured to perform loop diagnostics on the two-wire process control loop based upon the measured loop current and terminal voltage in response to receipt of a diagnostic command from the two-wire process control loop.

    Abstract translation: 一种用于工业过程的二线过程变量变送器，包括被配置为感测工业过程流体的过程变量的过程变量传感器。 输出电路被配置为在与所感测的过程变量相关的二线过程控制回路上提供输出。 回路电流测量电路测量流过两线制过程控制回路的回路电流，并且端子电压测量电路测量与过程变量变送器的端子电压相关的电压。 端子电压可以是两线过程变量变送器与两线过程控制回路的电气连接测量的电压。 输入电路被配置为从两线制过程控制回路接收诊断命令。 微处理器被配置为响应于从两线制过程控制回路接收到诊断命令，基于所测量的回路电流和端子电压在两线制过程控制回路上执行循环诊断。

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