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1. 发明授权

US5745708A Method for and apparatus for operating a local communications module in arbitrating for mastership of a data transfer across a back plane bus in industrial automation controller 失效
标题翻译：用于操作本地通信模块的方法和装置，用于在工业自动化控制器中通过背板总线仲裁数据传输
公开(公告)号：US5745708A
公开(公告)日：1998-04-28
申请号：US536535
申请日：1995-09-29
申请人： Robert C. Weppler , Timothy J. Murphy , Margarita M. Hutz , Alan C. Cribbs , Kendal R. Harris
发明人： Robert C. Weppler , Timothy J. Murphy , Margarita M. Hutz , Alan C. Cribbs , Kendal R. Harris
IPC分类号： G06F13/374 , G06F13/36
CPC分类号： G06F13/374
摘要： A bus structure for interconnecting the modules of an industrial automation controller includes DATA lines and associated control lines that enable interface circuits on each module to send and receive frames of data. An arbitration circuit in each module employs arbitration lines in the bus structure to conduct a two phase competition to determine which module receives the next bus mastership. The arbitration lines include a set of wired-or weight code lines and a single arbitration strobe line. Modules desiring control of the bus structure assert a local weight code onto the weight code lines and determine which module is asserting the numerically greatest local weight code. Arbitration is conducted separately on the bus structure and a winning module is ready to transfer its data frame as soon as the previous winner completes its transfer and relinquishes control of the bus structure. The winning weight code identifies both the source address of the winning module and the priority of the data frame to be sent, and is latched by all modules on the backplane bus as an arbitration vector to provide advance identification of the next module to transmit and the priority of the message.
摘要翻译：用于互连工业自动化控制器的模块的总线结构包括DATA线和相关联的控制线，其使每个模块上的接口电路能够发送和接收数据帧。每个模块中的仲裁电路在总线结构中使用仲裁线进行两阶段竞争，以确定哪个模块接收下一个总线主管。仲裁线包括一组有线或重量码线和单个仲裁选通线。期望控制总线结构的模块将局部权重代码置于权重码线上，并确定哪个模块正在声明数值最大的本地权重码。仲裁在总线结构上分开进行，一旦获胜者完成传输并放弃对总线结构的控制，获胜模块就可以随时传输数据帧。获胜权重码识别获胜模块的源地址和要发送的数据帧的优先级，并且由背板总线上的所有模块锁存作为仲裁向量，以提供下一个要发送的模块的提前识别，并且消息的优先级。

2. 发明授权

US5764927A Backplane data transfer technique for industrial automation controllers 失效
标题翻译：工业自动化控制器的背板数据传输技术
公开(公告)号：US5764927A
公开(公告)日：1998-06-09
申请号：US536533
申请日：1995-09-29
申请人： Timothy J. Murphy , Alan C. Cribbs , Robert C. Weppler , Margarita M. Hutz , Kendal R. Harris , Jack D. Calderon , David A. Karpuszka
发明人： Timothy J. Murphy , Alan C. Cribbs , Robert C. Weppler , Margarita M. Hutz , Kendal R. Harris , Jack D. Calderon , David A. Karpuszka
IPC分类号： G05B19/042 , G06F13/40 , H01J13/00
CPC分类号： G06F13/409 , G05B19/0423
摘要： A bus structure for interconnecting the modules of an industrial automation controller includes DATA lines and associated control lines that enable interface circuits on each module to transfer frames of data. Modules connected to the bus structure support data transfers of differing widths and differing speeds, and interface circuits within each module automatically adapt to data width and speed differences between communicating modules. During a first bus cycle of each transfer, sending and receiving modules negotiate a bus width and clock speed to be used for the transfer by asserting their respective width and speed codes onto a set of wired-or status lines. After the first bus cycle, the status lines are then used for communicating alternate functions between the participating modules.
摘要翻译：用于互连工业自动化控制器的模块的总线结构包括DATA线和相关联的控制线，其使每个模块上的接口电路能够传输数据帧。连接到总线结构的模块支持不同宽度和不同速度的数据传输，每个模块内的接口电路自动适应通信模块之间的数据宽度和速度差异。在每个传输的第一个总线周期期间，发送和接收模块通过将其各自的宽度和速度代码断言到一组有线或状态线来协商用于传输的总线宽度和时钟速度。在第一个总线周期之后，状态线用于在参与模块之间传递备用功能。

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