发明名称 |
Apparatus for providing access to field devices in a distributed control system |
摘要 |
<p>An apparatus for accessing field devices in a distributed control system provides non-redundant secondary access to a plurality of field devices that are controlled by a control room. An apparatus also provides redundant wireless to access field devices in a distributed control system having primary access to the field devices provided by hard-wired media that couples the field devices to the control room. The field devices are coupled to a Fieldbus control network. In a first embodiment, each field device is provided with a wireless Fieldbus port that is accessible by a wireless handheld unit or wireless terminal. In a second embodiment, each Fieldbus control network is provided with a field module having a wireless Fieldbus port that allows all devices connected to the Fieldbus control network to be accessed by a wireless handheld unit or a wireless terminal. In a third embodiment, an H2-to-H1 Fieldbus bridge (which may service a plurality of H1 control networks) is provided with a wireless Fieldbus port that allows all Fieldbus devices connected to H1 control networks serviced by the H2-to-H1 bridge to be access by a wireless handheld unit of a wireless terminal. In a fourth embodiment, a bridge/converter provides an interface between older analog control room components and newer Fieldbus field devices.</p> |
申请公布号 |
AU702269(B2) |
申请公布日期 |
1999.02.18 |
申请号 |
AU19950039553 |
申请日期 |
1995.10.20 |
申请人 |
FISHER-ROSEMOUNT SYSTEMS, INC. |
发明人 |
GARY TAPPERSON;THOMAS ANDREW BOYD |
分类号 |
G05B15/02;G05B19/418;(IPC1-7):G05B19/418 |
主分类号 |
G05B15/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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