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公开(公告)号：DE69721478T2
公开(公告)日：2004-04-08
申请号：DE69721478
申请日：1997-09-17
Applicant: ROSEMOUNT INC
Inventor： ANDERSON D , JOHNSON L , JUNK S , ORMAN A , SCHNAARE H , TETZLAFF E
Abstract: A field instrument includes an input circuit having a transistor bridge rectifier which is couplable to a power supply. The transistor bridge rectifier is configured to provide power from the power supply to a remainder of the field instrument.
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公开(公告)号：DE69721478D1
公开(公告)日：2003-06-05
申请号：DE69721478
申请日：1997-09-17
Applicant: ROSEMOUNT INC
Inventor： ANDERSON D , JOHNSON L , JUNK S , ORMAN A , SCHNAARE H , TETZLAFF E
Abstract: A field instrument includes an input circuit having a transistor bridge rectifier which is couplable to a power supply. The transistor bridge rectifier is configured to provide power from the power supply to a remainder of the field instrument.
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公开(公告)号：DE69735555D1
公开(公告)日：2006-05-18
申请号：DE69735555
申请日：1997-09-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E , WARRIOR JOGESH , MAALOUF GABRIEL A
IPC: G05B19/418 , G05B15/02 , G05B19/042
Abstract: The present invention includes a process control instrument (100) having an improved data bus protocol for facilitating communications between master and slave nodes. The process control instrument (100) includes a microprocessor (200) operating in accordance with the SPI data bus protocol, first and second peripheral devices (204,206), and a data bus (220) coupled to the microprocessor and the first and second peripheral devices. The improved data bus protocol used in the process control instruments of the present invention provides numerous advantages such as reduced printed circuit board space requirements and greater interchangeability of peripheral and master node components.
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公开(公告)号：DE69728644D1
公开(公告)日：2004-05-19
申请号：DE69728644
申请日：1997-09-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E , WARRIOR JOGESH , MAALOUF A
IPC: G05B15/02 , G05B19/042 , G05B19/418
Abstract: The present invention includes a process control instrument (100) having an improved data bus protocol for facilitating communications between master and slave nodes. The process control instrument (100) includes a microprocessor (200) operating in accordance with the SPI data bus protocol, first and second peripheral devices (204,206), and a data bus (220) coupled to the microprocessor and the first and second peripheral devices. The improved data bus protocol used in the process control instruments of the present invention provides numerous advantages such as reduced printed circuit board space requirements and greater interchangeability of peripheral and master node components.
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公开(公告)号：DE69816455D1
公开(公告)日：2003-08-21
申请号：DE69816455
申请日：1998-02-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E , ROSS P
Abstract: A transmitter for use in a process control setting includes a sensor adapted to couple to a process and provide a sensor output related to a parameter of the process. A modulator coupled to the sensor output responsively provides a digital bit stream output representative of the sensor output. A filter provides a current decimation output. A comparator compares a previous decimation output with the current decimation output. Circuitry is provided for transmitting an output related to the parameter based upon the current decimation.
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Patent Agency Ranking
公开(公告)号：DE69735555T2
公开(公告)日：2007-01-18
申请号：DE69735555
申请日：1997-09-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E , WARRIOR JOGESH , MAALOUF GABRIEL A
IPC: G05B19/418 , G05B15/02 , G05B19/042
Abstract: The present invention includes a process control instrument (100) having an improved data bus protocol for facilitating communications between master and slave nodes. The process control instrument (100) includes a microprocessor (200) operating in accordance with the SPI data bus protocol, first and second peripheral devices (204,206), and a data bus (220) coupled to the microprocessor and the first and second peripheral devices. The improved data bus protocol used in the process control instruments of the present invention provides numerous advantages such as reduced printed circuit board space requirements and greater interchangeability of peripheral and master node components.
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公开(公告)号：DE69728644T2
公开(公告)日：2005-05-25
申请号：DE69728644
申请日：1997-09-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E , WARRIOR JOGESH , MAALOUF A
IPC: G05B15/02 , G05B19/042 , G05B19/418
Abstract: The present invention includes a process control instrument (100) having an improved data bus protocol for facilitating communications between master and slave nodes. The process control instrument (100) includes a microprocessor (200) operating in accordance with the SPI data bus protocol, first and second peripheral devices (204,206), and a data bus (220) coupled to the microprocessor and the first and second peripheral devices. The improved data bus protocol used in the process control instruments of the present invention provides numerous advantages such as reduced printed circuit board space requirements and greater interchangeability of peripheral and master node components.
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公开(公告)号：DE69729629T2
公开(公告)日：2004-11-18
申请号：DE69729629
申请日：1997-09-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E
Abstract: An apparatus for and method of serially transmitting a message between first and second devices coupled to a data or clock line in a process control device is disclosed. A first transition of the data or clock signal is generated during a signal cycle. A second transition of the signal is generated during the first signal cycle in order to control the duty cycle of the signal during the first signal cycle. If the duty cycle of the signal during the first signal cycle has a first value, then the first signal cycle is representative of a first data state transmitted between the first and second devices. If the duty cycle of the signal during the first signal cycle has a second value, then the first signal cycle is representative of a second data state transmitted between the first and second devices.
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公开(公告)号：DE69729629D1
公开(公告)日：2004-07-29
申请号：DE69729629
申请日：1997-09-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E
Abstract: An apparatus for and method of serially transmitting a message between first and second devices coupled to a data or clock line in a process control device is disclosed. A first transition of the data or clock signal is generated during a signal cycle. A second transition of the signal is generated during the first signal cycle in order to control the duty cycle of the signal during the first signal cycle. If the duty cycle of the signal during the first signal cycle has a first value, then the first signal cycle is representative of a first data state transmitted between the first and second devices. If the duty cycle of the signal during the first signal cycle has a second value, then the first signal cycle is representative of a second data state transmitted between the first and second devices.
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公开(公告)号：DE69816455T2
公开(公告)日：2004-04-15
申请号：DE69816455
申请日：1998-02-23
Applicant: ROSEMOUNT INC
Inventor： TETZLAFF E , ROSS P
Abstract: A transmitter for use in a process control setting includes a sensor adapted to couple to a process and provide a sensor output related to a parameter of the process. A modulator coupled to the sensor output responsively provides a digital bit stream output representative of the sensor output. A filter provides a current decimation output. A comparator compares a previous decimation output with the current decimation output. Circuitry is provided for transmitting an output related to the parameter based upon the current decimation.
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