JVL Industri Elektronik A/S - User Manual - Ethernet for MAC and MIS motors
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6.4
Ethernet switch
6.4.1
Selecting an Ethernet Switch
Depending on the network topology and size a suitable switch can be used. Also if mul-
tiple separated networks need to be connected a switch is used.
Depending on the actual size of the network different requirements needs to be met.
It is absolutely mandatory that every switch device or other device acting as a
switch complies with the Profinet RT protocol (LLDP and PN_PTCP frames
must be recognized).
Otherwise the net might very well get congested; because non-Profinet conforming
switches will broadcast messages not intended for broadcast.
Besides the Port mirroring function for network analyzing and troubleshooting purposes,
can be advantages. This feature makes it possible to route traffic out on a separate port
connected to a network analyser for debugging purposes and general performance mon-
itoring.
The JVL Profinet module has build in 2 port switch useful if a limited amount of motors
is connected in a daisy chaining topology. This switch is Profinet-IRT capable and will of
cause obey the above mentioned demands.
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