Two components connected to a link segment can exchange information about the data
transfer and can adapt their settings to each other. The mode with the highest possible speed
is set.
Note
Setting ports with a fixed configuration
Devices not supporting autonegotiation must be set permanently to 100 Mbps half duplex or
10 Mbps half duplex.
Auto polarity exchange
If the pair of receiving cables is connected incorrectly (RD+ and RD- interchanged), the polarity
is adapted automatically.
Note
The SCALANCE X-000 IE switches are plug-and-play devices that require no settings during
commissioning.
MDI / MDI-X autocrossover function
With the MPI/MDI-X autocrossover function, the send and receive contacts of an Ethernet port
are assigned automatically. The assignment depends on the cable with which the
communications partner is connected. This means that it does not matter whether the port is
connected using a patch cable or crossover cable. This prevents malfunctions resulting from
mismatching send and receive lines. This makes installation much easier for the user.
The SCALANCE X-000 devices support the MDI / MDI-X autocrossover function.
Insulation between the TP ports
NOTICE
Formation of loops
Note that the direct connection of two ports or accidental connection over several switches
causes an illegal loop that can cause network overload and failure.
Devices with port groups
On the following devices, the ports are divided into port groups.
● SCALANCE X005
6GK5 005-0BA00-1AA3
● SCALANCE X005TS
6GK5 005-0BA00-1CA3
Description of the device
4.3 TP ports (twisted pair)
SCALANCE X-000
18
Operating Instructions, 12/2018, C79000-G8976-C344-03
Summary of Contents for SIMATIC NET SCALANCE X-000 Series
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Page 10: ...Safety notices SCALANCE X 000 10 Operating Instructions 12 2018 C79000 G8976 C344 03 ...
Page 12: ...Network topologies SCALANCE X 000 12 Operating Instructions 12 2018 C79000 G8976 C344 03 ...
