SMA Sunny Boy Control - Manual (Page 139)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC - 14 : NE0206 135
9.2 Troubleshooting Powerline Communication
Powerline communication with Sunny Boy inverters is based on the “frequency shift
keying” principle, according to which digital information is coded by shifting the fre-
quency.
-400
-300
-200
-100
0
100
200
300
400
0 5 10 15 20
t[ms]
U[V]
1
0
Grid voltage (e. g. 230 V / 50 Hz)
Resulting digital signal
Fig. 9.8: Principle of Powerline communication