SMA Sunny Boy Control - Manual (Page 73)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC-14:NE0206 69
6.2.4 Tolerances
In the “TOLERANCES” menu, you can set the thresholds that will cause the Sunny Boy
Control to generate messages for a device (refer to section “6.3.3 Alarm Contact”).
[ TOLERANCES ]
‡Warning Time…
………………15min Timespan before generating a warning message
Warning Rate
………………100% Percentage how long the failure appears within the indecated timespan
Offline… Š
………………30min
Maximum timespan during which a device may not be reached
Energy…
………………50% Percentage yield expected of a device compared with the average
Communication…
………………50% Expected communication quality
RIso Failure…
……………500kOhm Minimum insulation resistance
Fig. 6.8: Adjusting tolerances
Once a warning or error message has been generated for a device, you can use the
diagnostic functions to troubleshoot the problem (refer to section 5).
The time value under “Warnings” indicates how long a failure must be present be-
fore the Sunny Boy Control generates a warning message.
The time value under “Offline” indicates how long in a day a device may not be
accessible during operating hours (i.e., between the time the device was switched on
and the time the last device is switched off). The smallest offline setting is 15 minutes.
The percentage under “Energy” indicates the minimum daily energy yield expected
of a device compared with the average of all other similar devices. Since the daily
energy data of the system becomes available only at the end of the day, this com-
parison can take place only at that time. If the daily energy yield of the device falls
short of the set percentage, an error message will be generated for the device. This
allows you to check whether the devices are operating well enough. It is advisable
not to set the energy tolerance percentage too high, since deviations in the yield of
arrays placed in different locations are normal. To obtain meaningful energy yield
comparisons, the compared devices must be of the same type.