SMA SSM16-11 - Manual (Page 51)

SMA Solar Technology AG 9 Configuring the Sunny String-Monitor via Sunny Central Control
Installation Guide SSM16-24-IA-IEN105120 51
9.3.3 Setting the Tripping Time
Using the tripping time, you can set the sensitivity of the string current monitoring, since it is included
in the calculation of the error sum. The tripping time is set to 180 minutes as default.
1. Select Device Set-up > SMUs > Parameters.
2. In the Error Report Time submenu, set the value in minutes.
9.3.4 Setting the Tolerance
You can use the tolerance to set the sensitivity of the string current monitoring, since it is included in
the calculation of the error sum. The tolerance is set to 10% as default.
Since only a clear deviation of a measuring channel from a mean value is an indication of a faulty
string, whereas minor deviations can be considered normal, the tolerance value must be set
accordingly high.
1. Select Device Set-up > SMUs > Parameters
2. In the submenu tolerance grp, set the value per group.
9.3.5 Setting the Monitoring Period
You can define a monitoring period for each individual measuring channel on the Sunny String-
Monitor. This allows you to filter out temporary effects such as shading on individual strings.
Under Monitoring On and Monitoring Off, one can set a specific time window for all measuring
channels of the Sunny String-Monitor for string current monitoring.
1. Select Device Set-up > SMUs > Devices > Parameters.
2. Select the String Monitor Unit you want.
3. In the submenu Monitoring (X) On and Monitoring (X) Off, one can set a specific time
window per measuring channel or for all the measuring channels of the Sunny String-Monitor.
9.3.6 Setting the Nighttime Deactivation
Nighttime deactivation in the Sunny Central is activated by default. Thus, the power supply to the
Sunny String-Monitors is deactivated in the Sunny Central as soon as the PV voltage has been under
250 V for one hour. The supply voltage switches itself on as soon as the PV voltage reaches 250 V.
If nighttime deactivation is deactivated, the supply voltage to the Sunny String-Monitor remains on at
night. This means that theft protection can be activated and evaluated, see section 9.3.7 ”Setting the
Theft Protection”, page 52.
1. Select Device Set-up > SMUs > Parameters.
2. In the submenu SMU Overn. Shut, set the nighttime disconnection.