Meaning in display mode D
In display mode D, the "L1" and "L2" LEDs indicate whether the power supply is monitored.
L1/L2 LED L1/L2 connector
LED color LED status
- O Power supply is not monitored.
If the power supply falls below 17 V, the signaling contact does not
respond.
Green On Power supply is monitored.
If the power supply falls below 17 V, the signaling contact responds.
4.7.7 Port LEDs
The port LEDs "P1", "P2" etc. show information about the corresponding ports.
The meaning of the Port LEDs depends on the set display mode, see section "LEDs "DM1" and
"DM2" (Page 34)".
Meaning in display mode A
In display mode A, the port LEDs indicate whether a valid link exists.
LED color LED status Meaning
- O No valid link to the port (for example communications part‐
ner turned o or cable not connected).
Green On Link exists and port in normal status. In this status, the port
can receive and send data.
Flashes once per period* Link exists and port in "Blocking" status. In this status, the
port only receives management data (no user data).
Flashes three times per pe‐
riod*
Link exists and port turned o by management. In this sta‐
tus, no data is sent or received via the port.
Flashes four times per pe‐
riod*
Link exists and is in the "Monitor Port" status. In this status,
the data trac of another port is mirrored to this port.
Yellow Flashing / lit Receiving data at port
* 1 period ≙ 2.5 seconds
Meaning in display mode B
In display mode B, the port LEDs indicate the transmission speed.
LED color LED status Meaning
- O Port operating at 10 Mbps
Green On Port operating at 100 Mbps
Orange On Port operating at 1000 Mbps
Green Flashing Port operating at 10 Gbps
If there is a connection problem and the type of transmission is xed (auto negotiation o), the
desired status, in other words the set transmission speed (10 Gbps, 1000 Mbps, 100 Mbps, 10
Description of the device
4.7 LED display
SCALANCE XM-400
36 Operating Instructions, 03/2021, C79000-G8976-C306-10
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