Interface module for use with a fieldbus device network and with internet and non-internet based process control networks
    42.
    发明授权
    Interface module for use with a fieldbus device network and with internet and non-internet based process control networks 有权
    接口模块,用于现场总线设备网络以及互联网和非互联网过程控制网络

    公开(公告)号:US07246194B2

    公开(公告)日:2007-07-17

    申请号:US10931165

    申请日:2004-08-31

    摘要: An interface module is operatively connected to a Fieldbus process control network and to at least one non-Fieldbus process control network to facilitate the exchange of process control information between the networks. The interface module stores a database in which the process control parameters of the function blocks in the field devices of the Fieldbus process control network are mapped to corresponding process control parameters of the non-Fieldbus process control network. Once the Fieldbus process control parameters are mapped to the non-Fieldbus process control parameters, the interface module is adapted to transmit request messages on the Fieldbus process control network to the Fieldbus field devices for the current values of the process control parameters, receive response messages from the Fieldbus field devices, and store the current values of the process control parameters in the database. The interface module may also function in the other direction to map non-Fieldbus process control parameters to corresponding Fieldbus process control parameters.

    摘要翻译: 接口模块可操作地连接到现场总线过程控制网络和至少一个非现场总线过程控制网络,以便于在网络之间交换过程控制信息。 接口模块存储一个数据库,其中现场总线过程控制网络的现场设备中的功能块的过程控制参数映射到非现场总线过程控制网络的相应过程控制参数。 一旦现场总线过程控制参数映射到非现场总线过程控制参数,接口模块就适用于将现场总线过程控制网络上的请求消息传送到现场总线现场设备,以了解过程控制参数的当前值,接收响应消息 从现场总线现场设备中,将过程控制参数的当前值存储在数据库中。 接口模块还可以在另一个方向上工作,将非现场总线过程控制参数映射到相应的现场总线过程控制参数。

    Error compensation for a process fluid temperature transmitter
    43.
    发明授权
    Error compensation for a process fluid temperature transmitter 有权
    过程流体温度变送器的误差补偿

    公开(公告)号:US06356191B1

    公开(公告)日:2002-03-12

    申请号:US09335212

    申请日:1999-06-17

    IPC分类号: G08B2300

    CPC分类号: G01K7/20 G08C19/02

    摘要: A process fluid temperature transmitter includes circuitry that improves compensation of error due to the presence of one or more non-associated voltage sources in a resistance temperature device (RTD) circuit. A method of compensating for such error is also provided.

    摘要翻译: 过程流体温度变送器包括改善由于在电阻温度器件(RTD)电路中存在一个或多个非相关电压源引起的误差补偿的电路。 还提供了补偿这种误差的方法。