Setting The Groups; Setting The Tripping Time - SMA SUNNY STRING-MONITOR Technical Description

8 Function of the String Current Monitoring
1. Select Device Setup > SMUs > Devices > Parameters.
2. Select Sunny String-Monitor.
3. In the submenu No. Of Strings or No. of Str. All set the number of strings connected per
measuring channel used.
8.3.2 Setting the Groups
With Sunny Central Control one can subdivide the individual measuring channels of the connected
measuring boards into 3 groups, to make it possible to compare only the measuring channels which
have the same properties. The groups are monitored independently of each other, and each
individual measuring channel can be allocated freely to any group. An individual group must include
at least 4 measuring channels.
TIP:
In the Group all chan. all the measuring channels of the measuring circuit board can be assigned
to a group.` This avoids having to allocate the individual measuring channels to a group as this then
occurs automatically for all the individual measuring channels.
If you wish not to include individual channels from the measuring board in the string current
monitoring, these should be assigned to the 0 group, since string monitoring is deactivated for this
group. This way, this measuring channel is not included in the average value calculation.
1. Select Device Setup > SMUs > Devices > Parameters.
2. Select Sunny String-Monitor.
3. In the Group channel or Group all chan. submenu, set the group numbers for the measuring
channels.
8.3.3 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 (see chapter 8.2 "Functionality of the String Current
Monitoring", page 48).
1. Select Device Set-up > SMUs > Parameters.
2. In the Error report time submenu, set the value in minutes.
52 SSM-TEN103132
SMA Solar Technology AG
Technical Description