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1. 发明申请

WO1996012993A1 APPARATUS FOR PROVIDING ACCESS TO FIELD DEVICES IN A DISTRIBUTED CONTROL SYSTEM 审中-公开
标题翻译：用于在分布式控制系统中提供对现场设备的访问的装置
公开(公告)号：WO1996012993A1
公开(公告)日：1996-05-02
申请号：PCT/US1995013150
申请日：1995-10-20
申请人： FISHER-ROSEMOUNT SYSTEMS, INC.
发明人： FISHER-ROSEMOUNT SYSTEMS, INC. , TAPPERSON, Gary , BOYD, Thomas, Andrew
IPC分类号： G05B19/418
CPC分类号： G05B19/4185 , G05B2219/31122 , G05B2219/31162 , G05B2219/31251 , Y02P90/18
摘要： 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 accessed 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.
摘要翻译：用于访问分布式控制系统中的现场设备的设备为由控制室控制的多个现场设备提供非冗余二次访问。一种装置还提供冗余无线以访问分布式控制系统中的现场设备，该分布式控制系统具有主要访问由现场设备提供的现场设备，该现场设备将现场设备耦合到控制室。现场设备耦合到现场总线控制网络。在第一实施例中，每个现场设备设置有无线手持单元或无线终端可访问的无线现场总线端口。在第二实施例中，每个现场总线控制网络设置有具有无线现场总线端口的现场模块，其允许连接到现场总线控制网络的所有设备由无线手持单元或无线终端接入。在第三实施例中，H2到H1现场总线桥（其可以服务多个H1控制网络）设置有无线现场总线端口，其允许连接到H1到H1桥服务的H1控制网络的所有现场总线设备由无线终端的无线手持单元访问。在第四实施例中，桥/转换器提供较老的模拟控制室部件和较新的现场总线现场设备之间的接口。

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