公开(公告)号：DE69423105D1

公开(公告)日：2000-03-30

申请号：DE69423105

申请日：1994-08-12

Applicant: ROSEMOUNT INC

Inventor： BRODEN A ,  ORTH M ,  BORGESON W ,  LANCTOT B ,  VOEGELE D

IPC: G08C19/02

Abstract: In this invention, a multivariable transmitter providing an output representative of mass flow has a dual microprocessor structure. The first microprocessor compensates digitized process variables and the second microprocessor computes the mass flow as well as arbitrating communications between the transmitter and a master. In a second embodiment of the present invention, a first microprocessor compensates digitized process variables, a second microprocessor computes an installation specific physical parameter such as mass flow and a third microprocessor arbitrates real-time communications between the transmitter and a master.

公开(公告)号：DE69429008T2

公开(公告)日：2002-07-11

申请号：DE69429008

申请日：1994-08-15

Applicant: ROSEMOUNT INC

Inventor： VOEGELE D ,  LANCTOT B ,  WESTFIELD L

IPC: G01R27/14 ,  G01R31/28

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 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：DE69429008D1

公开(公告)日：2001-12-13

申请号：DE69429008

申请日：1994-08-15

Applicant: ROSEMOUNT INC

Inventor： VOEGELE D ,  LANCTOT B ,  WESTFIELD L

IPC: G01R27/14 ,  G01R31/28

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 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：DE69423105T2

公开(公告)日：2000-11-09

申请号：DE69423105

申请日：1994-08-12

Applicant: ROSEMOUNT INC

Inventor： BRODEN A ,  ORTH M ,  BORGESON W ,  LANCTOT B ,  VOEGELE D

IPC: G08C19/02

Abstract: In this invention, a multivariable transmitter providing an output representative of mass flow has a dual microprocessor structure. The first microprocessor compensates digitized process variables and the second microprocessor computes the mass flow as well as arbitrating communications between the transmitter and a master. In a second embodiment of the present invention, a first microprocessor compensates digitized process variables, a second microprocessor computes an installation specific physical parameter such as mass flow and a third microprocessor arbitrates real-time communications between the transmitter and a master.