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    • 62. 发明授权
    • Custom function blocks for use with process control systems
    • 用于过程控制系统的自定义功能块
    • US07822495B2
    • 2010-10-26
    • US10123822
    • 2002-04-15
    • Mark J. NixonKen BeoughterBrandon HiebTerrence L. BlevinsDennis L. Stevenson
    • Mark J. NixonKen BeoughterBrandon HiebTerrence L. BlevinsDennis L. Stevenson
    • G05B13/02G05B15/00G05B9/02G06F9/44G06F3/00
    • G05B19/0426G05B2219/23258G05B2219/25232G05B2219/25428G06F8/10G06F8/30G06F8/33G06F8/40G06F8/70
    • A system and method for creating and incorporating a function block within a process control system enables a user of the process control system to generate a function block by combining a plurality of files selected from a group of files provided by the manufacturer of the process control system to form a source code file associated with the function block. The user can modify the function block source code file to include a procedure, routine or algorithm that is not provided by the manufacturer and can send the modified source code file to the manufacturer for validation. If the function block source code file is validated, a security measure such as a digital signature is provided to the user that enables the user to incorporate the function block within the process control system. The function blocks can be used to incorporate a new function into a process control application or to operatively integrate a data source external to a process control application with the process control application via data mapping functions performed by the function blocks.
    • 用于在过程控制系统内创建和结合功能块的系统和方法使得过程控制系统的用户能够通过组合从由过程控制系统的制造商提供的一组文件中选择的多个文件来生成功能块 以形成与功能块相关联的源代码文件。 用户可以修改功能块源代码文件,以包括制造商不提供的过程,例程或算法,并将修改的源代码文件发送给制造商进行验证。 如果功能块源代码文件被验证,则向用户提供诸如数字签名的安全措施,使用户能够将功能块并入过程控制系统内。 功能块可用于将新功能并入过程控制应用程序中,或者可以通过由功能块执行的数据映射功能将过程控制应用程序外部的数据源与过程控制应用程序进行操作。
    • 64. 发明申请
    • Non-Periodic Control Communications in Wireless and Other Process Control Systems
    • 无线和其他过程控制系统中的非周期控制通信
    • US20090299495A1
    • 2009-12-03
    • US12537778
    • 2009-08-07
    • Terrence L. BlevinsDeji ChenMark J. NixonGregory K. McMillan
    • Terrence L. BlevinsDeji ChenMark J. NixonGregory K. McMillan
    • G05B13/02
    • G05B11/42G05B2219/31121G05B2219/33192G05B2219/34306Y02P70/163
    • Disclosed is a controller having a processor and a control module adapted for periodic execution by the processor and configured to be responsive to a process variable to generate a control signal for a process. An iteration of the periodic execution of the control module involves implementation of a routine configured to generate a representation of a process response to the control signal. The routine is further configured to maintain the representation over multiple iterations of the periodic execution of the control module and until an update of the process variable is available. In some cases, the update of the process variable is made available via wireless transmission of the process signal. In those and other cases, the controller may be included within a process control system having a field device to transmit the process signal indicative of the process variable non-periodically based on whether the process variable has changed by more than a predetermined threshold. In some embodiments, the field device also transmits the process signal if a refresh time has been exceeded since a last transmission.
    • 公开了一种具有处理器和控制模块的控制器,该处理器和控制模块适于由处理器进行周期性执行,并被配置为响应于过程变量以产生用于过程的控制信号。 控制模块的周期性执行的迭代涉及被配置为生成对控制信号的过程响应的表示的例程的实现。 该例程还被配置为通过控制模块的周期性执行的多次迭代来维持表示,并且直到过程变量的更新可用。 在某些情况下,过程变量的更新可通过过程信号的无线传输获得。 在这些和其他情况下,控制器可以被包括在具有现场设备的过程控制系统中,该现场设备基于过程变量是否已经改变超过预定阈值来发送指示过程变量非周期性的过程信号。 在一些实施例中,如果自上次发送以来已经超过了刷新时间,则现场设备还发送处理信号。
    • 68. 发明授权
    • Increasing reliability and reducing latency in a wireless network
    • 在无线网络中增加可靠性并减少延迟
    • US08798084B2
    • 2014-08-05
    • US12100927
    • 2008-04-10
    • Wallace A. Pratt, Jr.Mark J. NixonEric D. RotvoldRobin S. PramanikTomas P. LennvallTerrence L. Blevins
    • Wallace A. Pratt, Jr.Mark J. NixonEric D. RotvoldRobin S. PramanikTomas P. LennvallTerrence L. Blevins
    • H04L12/56
    • G01D21/00H04W24/00H04W56/0015H04W56/002H04W80/00
    • A mesh communication network for use in, for example, process control plants includes a plurality of network devices transmitting and receiving data according to a network schedule defined as a set of concurrent overlapping superframes, and along a set of graphs defining communication paths between pairs of network devices. A network manager residing in or outside the communication network develops a routing scheme for the network by analyzing the topology of the network and defining a set of graphs for use in routing or transmitting data between various nodes of the network, each graph including one or more communication paths between pairs of network devices. Concurrently or consequently, the network manager defines the network schedule in view of at least transmission requirements, power availability, and signal quality at each network device. If desired, the network manager may begin to define the network schedule upon completing the definition of the graphs of the communication network, so that the network manager may define the network schedule in view both the defined graphs and the transmission, power, etc. parameters associated with each network device.
    • 用于例如过程控制设备的网状通信网络包括多个网络设备,其根据定义为一组并发重叠超帧的网络调度,以及沿着一组图形定义通信路径 网络设备。 驻留在通信网络中或外部的网络管理器通过分析网络的拓扑并定义用于在网络的各个节点之间路由或传输数据的图形集合来开发网络的路由方案,每个图包括一个或多个 网络设备对之间的通信路径。 鉴于至少传输要求,功率可用性和每个网络设备的信号质量,网络管理器同时或因此定义网络调度。 如果需要,网络管理器可以在完成通信网络的图形的定义时开始定义网络调度,使得网络管理员可以在定义的图形和传输,功率等参数中定义网络调度 与每个网络设备相关联。