2. Preparing for commissioning
2-3
Festo CPX-FB36-EN en 1611a English
2.1 EtherNet/IP protocol
EtherNet/IP is an industrial Ethernet protocol, which is pre
dominantly used in automation technology.
The EtherNet/IP protocol is activated with DIL switch 1.2 in
the OFF position (è Tab. 1/2).
The bus node is then identified with the designation
“FB36 - EtherNet IP Remote-IO”.
After switching the protocol, the following unmodified para
meters are available:
– IP address
– Diagnostics mode
– System parameters
The DIL switch function remains unchanged.
Retentive bus-specific parameters are only active if the relev
ant protocol is selected (è section 1.2.4).
Parameterisation examples can be found in the appendix
(è C.5).
2.1.1 “Multicast” telegram
EtherNet/IP uses “IP Multicast” telegrams as standard for
transferring process data. The advantage of “Multicast” com
pared to “Unicast” is that a telegram can be received by mul
tiple participants.
Simple switches, however, cannot distinguish to which parti
cipant a “Multicast” telegram is to be transferred. Therefore,
these switches send the “Multicast” telegrams to all devices
in the network.
This results in an EtherNet/IP participant receiving numerous
unnecessary telegrams, which must then be discarded from
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