Description of the device
4.3 LED display
SCALANCE W778-1 /W738-1
24
Operating Instructions, 07/2020, C79000-G8976-C450-06
4.3
LED display
Information on operating status and data transfer
On the front of the housing, several LEDs provide information on the operating status of
the device:
LED
Color
Meaning
L1
Off
Power supply L1 too low.
Green
Power supply L1 is applied
L2
Off
Power supply L2 too low
Green
Power supply L2 is applied
PoE
Off
The device is not supplied using PoE.
Green
The device is supplied using PoE.
P1
Off
There is no connection over the Ethernet port P1.
Green
There is a connection over the Ethernet port P1 (link).
Flashing green
and yellow
Data transfer over the Ethernet interface P1.