SMA SC 500HE-20 - Manual (Page 39)

SMA Solar Technology AG 5 SC-COM Communication
Operating Manual SCxxxHE-20-BE-BEN111210 39
5.4.6 Setting the Tolerance
You can use the tolerance to set the sensitivity of the string current monitoring. The tolerance is
included in the calculation of the error sum.
Since only a clear deviation of a measuring channel from a mean value is an indication of a faulty
string, the tolerance value should be set accordingly high. Minor deviations are considered normal.
1. Select a Sunny Central String-Monitor Controller "SCSMC" from the device list.
2. Select the "Parameters" tab.
3. Enter the tolerance value in percent for the groups in the parameter fields "SMU_tolerance grp1"
to "SMU_tolerance grp3".
4. Confirm entry with [Save].
5.5 Reading the Measured Values
5.5.1 Reading the Measured Values of the Groups
1. Access the SC-COM interface.
2. Enter the installer password in the appropriate field on the homepage and press [Login].
3. Select a Sunny Central String-Monitor Controller from the device list.
4. Read off the mean values for the groups on the "Spot values" tab.
5.5.2 Reading the Measured Values for the Individual Measuring
Channels
1. Access the SC-COM interface.
2. Enter the installer password in the appropriate field on the homepage and press [Login].
3. Select a Sunny String-Monitor from the list of devices.
4. Read the mean values for the individual measuring channels on the "Spot values" tab.