Rockwell-automation Ethernet Design Considerations Reference Manual Manual do Utilizador descarregar pdf (Página 32)

32 Rockwell Automation Publication ENET-RM002C-EN-P - May 2013

Chapter 3 Ethernet Infrastructure Features

Transmission Packets

Data is transmitted over the EtherNet/IP network in packets. There are

transmission methods for transporting data on the network.

Packet Type Destination Description

Unicast A single node Unicast connections are point-to-point transmissions between a source node and destination node on the network.

A frame is sent to a single destination.

Multicast Multiple nodes

simultaneously

Multicast connections deliver information from one sender to multiple receivers simultaneously.

Copies of a single frame are passed to a selected subset of possible destinations.

Broadcast All nodes Broadcast connections transmit information to every device on the network.

A frame is delivered to all hosts on the network.

1756 Controller

Stratix Switch

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Rockwell-automation Ethernet Design Considerations Reference Manual Manual do Utilizador Página 32