Process I/O to fieldbus interface circuit
First Claim
1. A transmitter in a process control system, comprising:
- a transducer for sensing a process variable and providing a transducer output;
measurement circuitry coupled to the transducer output to process the transducer output and provide a measured output;
transmitter interface circuitry coupled to the measurement circuitry adapted to provide an interface output representative of the measured output and to receive a transmitter command and respond in accordance with the transmitter command;
Fieldbus interface circuitry adapted to couple to a process control loop operating in accordance with the Fieldbus standard, the Fieldbus interface circuitry coupled to I/O registers supporting Read, Write, Control and Event data, the Fieldbus interface circuitry responsively writing Fieldbus data received from the process control loop into the I/O registers and responsively transmitting Fieldbus data on the process control loop data read from the I/O registers; and
conversion circuitry coupled between the Fieldbus interface circuitry and the transmitter interface circuitry adapted to write data into the I/O registers, related to the interface output received from the transmitter interface circuitry.
1 Assignment
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Accused Products
Abstract
A field device such as a transmitter in a process control system includes conversion circuitry coupled between Fieldbus interface circuitry and transmitter interface circuitry. The transmitter includes a transducer for sensing a process variable and providing a transducer output. Measurement circuitry couples to the transducer output, processes the transducer output and provides a measurement output. The transmitter interface circuitry couples to the measurement circuitry and provides an interface output representative of the measurement output. Further, the transmitter interface circuitry receives a transmitter command and responds in accordance with the transmitter command. The Fieldbus interface circuitry is adapted to couple to a process control loop which operates in accordance with the Fieldbus standard.
268 Citations
24 Claims
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1. A transmitter in a process control system, comprising:
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a transducer for sensing a process variable and providing a transducer output; measurement circuitry coupled to the transducer output to process the transducer output and provide a measured output; transmitter interface circuitry coupled to the measurement circuitry adapted to provide an interface output representative of the measured output and to receive a transmitter command and respond in accordance with the transmitter command; Fieldbus interface circuitry adapted to couple to a process control loop operating in accordance with the Fieldbus standard, the Fieldbus interface circuitry coupled to I/O registers supporting Read, Write, Control and Event data, the Fieldbus interface circuitry responsively writing Fieldbus data received from the process control loop into the I/O registers and responsively transmitting Fieldbus data on the process control loop data read from the I/O registers; and conversion circuitry coupled between the Fieldbus interface circuitry and the transmitter interface circuitry adapted to write data into the I/O registers, related to the interface output received from the transmitter interface circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 22)
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11. A field device in a process control system, comprising:
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a control element for receiving a control input and responsively controlling a process; control circuitry coupled to the control input to control the process in response to a command input; field device interface circuitry coupled to the control circuitry adapted to provide the command input in response to a field device command; Fieldbus interface circuitry adapted to couple to a process control loop operating in accordance with the Fieldbus standard, the Fieldbus interface circuitry coupling to I/O registers supporting Read, Write, Control, and Event data, the Fieldbus interface circuitry responsively writing Fieldbus data received from the process control loop into the I/O registers and responsively transmitting Fieldbus data on the process control loop data read from the I/O registers; and conversion circuitry coupled between the Fieldbus interface circuitry and the field device interface circuitry adapted to data read from the I/O registers and responsively provides the field device command to the field device interface circuitry. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24)
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Specification