Operation of the Sunny Central String-Monitor
SMA Solar Technology AG
60
SSMUS-TUS094511
Technical Description
11 Operation of the Sunny Central String-Monitor
The Sunny Central String-Monitor cannot be operated unless there is a Sunny WebBox connected to
the Sunny Central.
11.1 Terms and Definitions
Accuracy
Adjusting sensitivity by varying the triggering threshold:
• sensitiv
• regular
• insensitiv
Creating Groups
A group is made up of several PV strings. For instance, you can create a group of PV strings connected
to inverters which are shaded during the morning. This will result in similar measurements for the whole
group.
Communication Period
Time period during which the Sunny Central String-Monitor Controller communicates with the Sunny
Central String-Monitors. Upon leaving our factory, the default communication period is set from
10:00 hours (10:00 a.m.) to 15:00 hours (3:00 p.m.). The Sunny Central String-Monitors are
supplied with energy from the PV panel. If, for example, the Sunny Central String-Monitor Controller
tries to communicate with the Sunny Central String-Monitors during the night, they will be unable to
respond. The Sunny Central String-Monitor Controller will generate an error report.
Monitoring Period
Time period during which the Sunny Central String-Monitor Controller monitors the Sunny Central
String-Monitors. Upon leaving our factory, the default monitoring period is set from 10:00 hours
(10:00 a.m.) to 15:00 hours (3:00 p.m.). At night, when the PV plant is not producing any power,
the Sunny Central String-Monitor Controller and the Sunny Central String-Monitors are unable to
communicate with each other.
You will find operating instructions for the Sunny WebBox in the technical description of
the Sunny WebBox.
