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    • 5. 发明授权
    • Local area method arrangement
    • 局域方法安排
    • US5920253A
    • 1999-07-06
    • US793851
    • 1997-03-10
    • Seppo Laine
    • Seppo Laine
    • H04B3/54H04L12/28H04L12/403H04L29/12H05B37/02H04B1/00H04L27/00
    • H05B37/0263H04B3/54H04L12/40032H04L12/403H04L29/12254H04L29/12801H04L61/2038H04L61/6004H04B2203/542H04L12/2803H04L12/2838
    • A local area network arrangement is taught for implementing a control system. The local area network arrangement includes a low-voltage bus composed of a cable pair, functioning as a common transmission path of the network, a plurality of connection units connecting the bus to operating devices to be controlled by the network, and a control unit common to the operating devices, connected to the bus, for controlling the operating devices. Data is transmitted in the network both from the control unit to the connection units, and from the connection units to the control unit. More particularly, the control units send to the bus a constant-frequency carrier signal whereby a number of cycles of the carrier signal form a transmission frame, in which each connection unit corresponds to a particular cycle of the frame. Also, for at least part of the cycles of the transmission frame, one half of each cycle is used for transmitting data to one specific connection unit, and the other half is used for transmitting power to all connection units.
    • PCT No.PCT / FI95 / 00489 Sec。 371日期1997年3月10日 102(e)1997年3月10日PCT PCT 1995年9月5日PCT公布。 公开号WO96 / 08096 日期1996年3月14日教授实施控制系统的局域网安排。 局域网布置包括由作为网络的公共传输路径的电缆对组成的低压总线,将总线连接到要由网络控制的操作设备的多个连接单元,以及控制单元公共 连接到总线的操作设备,用于控制操作设备。 数据在网络中从控制单元传输到连接单元,并从连接单元传输到控制单元。 更具体地,控制单元向总线发送恒定频率载波信号,由此载波信号的多个周期形成传输帧,其中每个连接单元对应于帧的特定周期。 此外,对于传输帧的至少部分周期,每个周期的一半用于将数据发送到一个特定连接单元,另一半用于向所有连接单元发送功率。