Siemens SCALANCE X-400 Operating Instructions Manual page 129

Figure 6-11
Note
If there is a link fault and the type of transmission is fixed (autonegotiation off), in DMode C,
the desired status, in other words the set type of transmission (full or half duplex) continues
to be displayed. If there is a link fault and autonegotiation is active, the port LED goes off.
Port statuses in DMode D
In display mode D, you can see whether or not the port is monitored.
Port
P1
P2
P3
P4
Figure 6-12
SCALANCE X-400
Operating Instructions, 06/2015, C79000-G8976-C186-12
Mode display (full, half duplex) of port 1
Color Status Meaning
off The port is not monitored; in other words, if a link is not established at
the port, this does not trigger the signaling contact.
Green on Port is monitored; in other words, if there is no link established at the
port (for example cable not plugged in or connected device turned off),
this triggers the signaling contact and the fault state is adopted.
Example: Monitoring of port 1 is "on"
Configuration / project engineering
6.5 LED display
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