Description   
2.4 LED displays 
  SCALANCE W788-xPRO/RR / SCALANCE W74x-1PRO/RR 
84  Operating Instructions (Compact), Release 08/2007, A5E00413342-05 
LED  Color  Meaning 
Green flashing 
quickly 
W788-xPRO/RR in access point mode:
 
With 802.11h, the channel is scanned for one minute for primary users 
before the channel can be used for data traffic. 
W788-xPRO/RR in client mode or W74x-1PRO/RR:
 
The LED is always off because the 2nd interface is not available in client 
mode. 
Flashing yellow  PRESET-PLUG detected. 
Yellow/green  PRESET function completed successfully. 
L1  Green  Power supply over the M12 connector (X2). 
F  Red  An error has occurred during operation of the SCALANCE W788-
xPRO/RR or W74x-1PRO/RR.