Unicast or Multicast Connection
During module configuration, you must configure the Connection over EtherNet/IP
parameter. The configuration choice dictates how input data is broadcast over the
network.
The PointMax I/O modules use one of the following methods to broadcast data:
- Multicast - Multicast connections deliver information from one sender to multiple receivers simultaneously. Copies of one transmission are passed to a selected subset of possible destinations.
- Unicast - Unicast connections are point-to-point transmissions between a source node and destination node on the network. A transmission is sent to one destination controller.
IMPORTANT:
Unicast is the default setting. Use Unicast
because it reduces network bandwidth usage. However, if you are using a ControlLogix
5580 controller in a high availability system, you must use Multicast.
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