公开(公告)号：EP2294765B1

公开(公告)日：2017-01-18

申请号：EP09767062.4

申请日：2009-06-17

Applicant: Rosemount Inc.

Inventor： KIELB, John, A. ,  WESTFIELD, Brian, L.

IPC: H04L12/40 ,  G05B19/418

CPC classification number: H04L12/40045 ,  G05B19/0423 ,  G05B2219/25191 ,  G05B2219/25196 ,  H04L12/40176 ,  H04L2012/4026 ,  Y10T307/445

公开(公告)号：EP1307792B1

公开(公告)日：2010-10-27

申请号：EP01952634.2

申请日：2001-07-12

Applicant: ROSEMOUNT INC.

Inventor： ROPER, Weston, R. ,  TYSON, David, G. ,  WESTFIELD, Brian, L. ,  GABOURY, Michael, J.

IPC: G05B19/042

CPC classification number: G05B19/4142 ,  G05B19/0423 ,  G05B2219/31121 ,  G05B2219/31126 ,  G05B2219/33197 ,  G05B2219/34309

Abstract: A two-wire industrial process control transmitter includes a sensor (14), at least two integrated circuits (70, 72), and a level shift circuit (48). The first integrated circuit (70) contains the analog measurement circuit that includes a sensor detection circuit (16) and the analog portion (44) of a digital-to-analog convertor. The second integrated circuit (72) contains the digital system circuit that includes a modem (78) and the digital portion (46) of the analog-to-digital convertor. The first and second Ics may be powered at different voltage levels (Vdda, Vddd) to maximize the power of the analog circuit and improve resolution. Alternatively, the Ics may be powered at the same voltage level (Vddd), but the digital circuits are divided among several stacked dies (120, 122) to minimize the voltage for each digital circuit. In either case, the level shifting circuit (48) shifts the voltage level between the analog and digital circuits.

公开(公告)号：EP0830646A1

公开(公告)日：1998-03-25

申请号：EP96920591.0

申请日：1996-05-31

Applicant: ROSEMOUNT INC.

Inventor： WESTFIELD, Brian, L. ,  ANDERSON, Stephen, D. ,  LOUWAGIE, Bennett, L. ,  PIECHOWSKI, Todd, A.

IPC: G05B11 ,  G05B19 ,  H04L25

CPC classification number: G05B19/0423 ,  G05B19/4185 ,  G05B2219/25189 ,  G05B2219/25191 ,  G05B2219/31121 ,  G05B2219/31126 ,  G05B2219/31135 ,  G05B2219/33197 ,  Y02P90/18

Abstract: Conversion circuitry (40) for use in a process control system (10) is adapted for coupling to a primary process control loop (26). Digital receiver circuitry (46, 52) in the conversion circuitry (40) receives a digital signal transmitted over the primary process control loop (26) from a field transmitter (22) and responsively provides a digital output. A microprocessor (50) receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry (62) for coupling to a secondary process control loop (58) receives the secondary loop control output from the microprocessor (50) and responsively controls current flowing through the secondary process control loop (58). The current flowing through the secondary process control loop (58) is related to the digital signal transmitted by the field transmitter (22).

公开(公告)号：EP0719417A1

公开(公告)日：1996-07-03

申请号：EP94925278.0

申请日：1994-08-15

Applicant: ROSEMOUNT INC.

Inventor： VOEGELE, Kevin, D. ,  LANCTOT, Jane, B. ,  WESTFIELD, Brian, L.

IPC: G01R27 ,  G01R31

CPC classification number: G01R27/14 ,  G01R31/2829

Abstract: An improved error detection for microprocessor-based transmitters in two-wire process control loops operating in the process control industry. In particular, techniques are shown which are useful in solving malfunctions or failures of microprocessor-based transmitters. When the transmitter (6) is energized, the impedance of the process loop cabling is resolved and stored, displayed or transmitted as desired. The loop impedance is used to calculate potential of a power supply used to power the control loop. This information is used in testing the two-wire loop.

公开(公告)号：EP1177484B1

公开(公告)日：2008-07-16

申请号：EP00926425.0

申请日：2000-04-27

Applicant: ROSEMOUNT INC.

Inventor： WESTFIELD, Brian, L. ,  ROPER, Weston, T. ,  TYSON, David, G.

IPC: G05B19/418 ,  G05B19/042

CPC classification number: G05B19/042 ,  G05B19/4185

Abstract: A process transmitter (100) suitable for coupling to a process loop (120) is disclosed. The process transmitter (100) includes a power regulator (210) adapted to receive a power signal on the process loop (120) and to provide a first signal (215) having a first voltage. Digital components (220) of the process transmitter (100) are electrically coupled to the power regulator (210) to receive power from the first signal (215). A step-up converter (230) is electrically coupled to the power regulator (210) and receives the first signal (215). The step-up converter (230) outputs a second signal (235) having a second voltage larger than the first voltage. Analog components (240) of the process transmitter (100) are electrically coupled to the step-up converter (230) to receive power from the second signal (235).

公开(公告)号：EP1776621A2

公开(公告)日：2007-04-25

申请号：EP05810421.7

申请日：2005-06-21

Applicant: Rosemount, Inc.

Inventor： KARSCHNIA, Robert, J. ,  WILLCOX, Charles, R. ,  BRODEN, David, A. ,  WESTFIELD, Brian, L. ,  ORTH, Kelly, M.

IPC: G05B19/418

CPC classification number: G05B19/4185 ,  G05B2219/33192 ,  Y02P90/18 ,  Y02P90/86

Abstract: A field device (14) for use in an industrial process control or monitoring system (10) connects to a two-wire process control loop (16). The loop (16) carries data and provides power to the field device (14). RF circuitry (22) in the field device (14) is provided for radio frequency communication. A power supply (18) powers the RF circuitry (22) using power received from the two-wire process control loop (16).

公开(公告)号：EP1307792A2

公开(公告)日：2003-05-07

申请号：EP01952634.2

申请日：2001-07-12

Applicant: ROSEMOUNT INC.

Inventor： ROPER, Weston, R. ,  TYSON, David, G. ,  WESTFIELD, Brian, L. ,  GABOURY, Michael, J.

IPC: G05B19/042

CPC classification number: G05B19/4142 ,  G05B19/0423 ,  G05B2219/31121 ,  G05B2219/31126 ,  G05B2219/33197 ,  G05B2219/34309

Abstract: A two-wire industrial process control transmitter includes a sensor (14), at least two integrated circuits (70, 72), and a level shift circuit (48). The first integrated circuit (70) contains the analog measurement circuit that includes a sensor detection circuit (16) and the analog portion (44) of a digital-to-analog convertor. The second integrated circuit (72) contains the digital system circuit that includes a modem (78) and the digital portion (46) of the analog-to-digital convertor. The first and second Ics may be powered at different voltage levels (Vdda, Vddd) to maximize the power of the analog circuit and improve resolution. Alternatively, the Ics may be powered at the same voltage level (Vddd), but the digital circuits are divided among several stacked dies (120, 122) to minimize the voltage for each digital circuit. In either case, the level shifting circuit (48) shifts the voltage level between the analog and digital circuits.

公开(公告)号：EP2294488A2

公开(公告)日：2011-03-16

申请号：EP09767061.6

申请日：2009-06-17

Applicant: Rosemount, Inc.

Inventor： KIELB, John, A. ,  WESTFIELD, Brian, L. ,  ORTH, Kelly, M.

IPC: G05B19/418 ,  H04L12/56

CPC classification number: G05B19/4185 ,  G01D21/00 ,  G05B2219/31121 ,  G05B2219/33192 ,  G05B2219/34313 ,  G08C17/02 ,  Y02P80/114 ,  Y02P90/18 ,  Y02P90/86

Abstract: An adapter (300) for coupling to a process control transmitter (308) of the type used to monitor a process variable in an industrial process includes a first connection configured to couple to a first side of a two wire process control loop (302), a second connection configured to couple to a second side of the two wire process control loop (302) and in series with a first connection to a process control transmitter (308), and a third connection configured to couple to a second connection of the process control transmitter (308). Wireless communication circuitry is coupled to at least the third connection and is configured to provide wireless communication for the process control transmitter (308). Intrinsic safety circuitry (460) coupled to at least one of the first, second and third connections is configured to limit transfer of electrical energy to a value which is less than an intrinsic safety value.

公开(公告)号：EP0606260B1

公开(公告)日：1997-10-08

申请号：EP92919210.2

申请日：1992-08-20

Applicant: ROSEMOUNT INC.

Inventor： Anderson, Stephen D. ,  FRICK, Roger, L. ,  MONZO, Glen, E. ,  WESTFIELD, Brian, L.

IPC: G08C19/00 ,  G08C19/02

CPC classification number: G08C19/02

Abstract: A three wire transmitter (50) bidirectionally communicates AC signals to and from a first external device (59) and sends DC signals to a second external device (59). The transmitter (50) includes a sensor circuit (52) and a communication circuit (70), both energized from power (66) and common (69) terminals of the transmitter (50). The communication circuit (70) receives a sensor output indicating a sensed process variable and provide DC and AC signals to a signal terminal (68) which connects to both external devices (59), and also receives AC signals from the first external device (59). The DC signal is representative of the sensed process variable and the AC signal is digitally representative of the sensed process variable and of transmitter data selected by the received AC signal.

公开(公告)号：EP0419562B1

公开(公告)日：1996-04-17

申请号：EP89907550.1

申请日：1989-06-08

Applicant: ROSEMOUNT INC.

Inventor： SCHULTE, John, P. ,  ORTH, Kelly, M. ,  FRICK, Roger, L. ,  WESTFIELD, Brian, L. ,  PASCHKE, Randy, K.

IPC: G01D5/24 ,  G01R27/26 ,  G01L9/12

CPC classification number: G01L9/12 ,  G01D5/24 ,  G01R27/2605

Abstract: A charge balanced feedback type transmitter (10) generates charge packets representative of a sensed parameter. Improved performance is achieved by the addition of resistance (R1), (R2) connected between a charge packet generating reactance (C1), (C2), (CL1), (CL2) and an integrator (30) to reduce the effects of noise caused by switching transients and by ground noise which is coupled to the charge packet generating circuitry (12) by stray capacitance. The charge packets are integrated by the integrator (30), and the integrator output is supplied from a selective basis to the input of a comparator (32). The output of the comparator (32) is used to control the application of balance. The input of the comparator (32) is selectively connected to the output of the integrator (30), to a first supply voltage, or to a second supply voltage to ensure a stable output of the comparator (32) at a critical time when charge is being supplied to the integrator (30).