SMA Sunny Boy Control - Manual (Page 83)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC-14:NE0206 79
Bus and string addresses
All devices in the system share the same bus and string addresses, which can be
changed for all devices simultaneously by changing them for the Sunny Boy Control
(select “SC” in Fig. 6.18). The default bus and string addresses are “00/00”. Chang-
ing the bus and string addresses is only necessary in the following cases.
•
Interference from a neighboring PV system
If you detect units from other systems in the neighborhood, you should change
the bus address of your system to make identification of your devices easier and
avoid interference from the other systems.
•
Managing a large system
If your PV system consists of several strings controlled by several Sunny Boy
Controls, each string must have a different address.
Device address
Each device in your system must have a unique device address to prevent confusion
and data errors. During device detection, the Sunny Boy Control automatically as-
signs device addresses while trying to preserve previously assigned addresses. If a
new device has the same address as another registered device, the new device is
assigned a different address.