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    • 3. 发明授权
    • Process I/O to fieldbus interface circuit
    • 对现场总线接口电路进行I / O处理
    • US5764891A
    • 1998-06-09
    • US602712
    • 1996-02-15
    • Jogesh Warrior
    • Jogesh Warrior
    • G05B19/418H04L12/40G06F17/00
    • G05B19/4185H04L12/40G05B2219/31126H04L2012/40221Y02P90/18
    • 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.
    • 诸如过程控制系统中的发射机的现场设备包括耦合在现场总线接口电路和发射机接口电路之间的转换电路。 发射器包括用于感测过程变量并提供换能器输出的换能器。 测量电路耦合到传感器输出,处理传感器输出并提供测量输出。 发射机接口电路耦合到测量电路,并提供表示测量输出的接口输出。 此外,发射机接口电路接收发射机命令并根据发射机命令进行响应。 现场总线接口电路适于耦合到根据现场总线标准进行操作的过程控制回路。