Meaning in display mode B
LED color LED status Meaning
- off Port operating at 10 Mbps.
green on Port operating at 100 Mbps.
orange on Port operating at 1000 Mbps.
If there is a problem on the connection and the type of transmission is fixed (autonegotiation 
off), the desired status, in other words the set transmission speed (1000 Mbps, 100 Mbps, 10 
Mbps) continues to be displayed. If there is a problem on the connection and autonegotiation 
is active, the port LED goes off.
Meaning in display mode C
LED color LED status Meaning
- off Port operating in half duplex.
green on Port operating in full duplex.
Meaning in display mode D
LED color LED 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 The port is monitored, in other words, if no connection was 
established at the port (for example no cable inserted), this 
triggers the signaling contact and an error state results.
orange on The port is monitored, in other words, when a valid con‐
nection exists at the port (for example non-permitted cable 
inserted), this triggers the signaling contact and an error 
state results.
Device description
4.4 LED display
SCALANCE X-300
38 Compact Operating Instructions, 11/2019, A5E00982643-18