Control Techniques Modbus TCP, Руководство пользователя

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Network Design Modbus TCP Module
10.3 Ring Topology
In a ring topology network, the controller connects to the first module, via a network switch.
The second Ethernet port of the module connects to another device, which in turn connects
to another device until all devices are connected. The final device connects back to the
switch.
The device supports beacon based ring node configuration.
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6.
A
NOTE
The network switch must support loss of line detection.
10.4 Combined Topologies
A single network can include both star and line components.
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0.
A
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