WAGO-ETHERNET-Zubehör 852
General
15
852-1112 8-Port 1000BASE-T-Industrial-Eco-Switch
Manual
Version 1.1.0FW/HW-Version 01/01
3.6
Switching, Filtering
Packets entering the Industrial Switch with source and destination addresses
belonging to the same port segment will be filtered, limiting those packets to one
port, and relieving the rest of the network from the need to process them. A packet
with a destination address served by another port segment will be forwarded to the
appropriate port, and will not be sent to the other ports where it is not needed.
Packets that are used to maintain network operations (such as the occasional multi
cast packet) are forwarded to all ports.
The Industrial Switch operates in the store and forward switching mode, which
eliminates bad packets and enables peak performance to be achieved when there is
heavy traffic on the network.
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3.7
Store-and-forward switching mode
The store-and-forward-switching mode is relay and transfer principle.
With this transfer principle the data packages or messages are relayed via
subsections from one network node to the next where they a buffered for a short
time.
Here they are checked for correctness and validity and then discarded or relayed
on to the final receiver.
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3.8
Line Depth in PROFINET
Line depth (cascading) is the number of all switches in a communication path.
The maximum line depth depends on the send cycle and the switch mode used.
Observe line depth!
Observe the maximum line depth for switches in Store-and-Forward mode
according to the “Topology Check” section of PI-PROFINET Commissioning
Guideline (PROFINET_Commissioning_8081) (
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3.9
Port Speed & Duplex Mode
After a cable is plugged into a specific port, the system uses auto negotiation to
determine the transmission mode for the new twisted pair connection:
If the connected device does not support auto negotiation or has auto negotiation
disabled, an auto sensing process is initiated to select the speed and set the duplex
mode to half duplex.
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