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7 - Operation
M
onitoring and data transmission
As a rule, the inverter operates automatically and does not require spe-
cial checks. When there is not enough solar radiation to supply power for
export to the grid (e.g. during the night), it disconnects automatically and
goes into stand-by mode.
The operating cycle is automatically restored when there is sufficient
solar radiation. At this point, the luminous LEDs on the LED panel will
indicate this state.
U
ser interface mode
The inverter is able to provide information about its operation through the
following instruments:
• Warning lights (luminous LEDs)
• LCD display for displaying operating data
• Data transmission on the dedicated RS-485
serial line. Data may be
collected by a PC or a data logger with an RS-485 port. Contact the ABB
support service with any queries about device compatibility.
T
ypes of data available
The inverter provides two types of data, which can be retrieved through
the special interface software and/or the display.
Real-time operating data
Real-time operating data can be transmitted on request through the com-
munication lines and are not recorded in the inverter.
Internally stored data
The inverter internally stores a set of data that are necessary for proces-
sing statistical data and an error log with time marking.
M
easurement tolerance
The data supplied by the inverter may differ from measurements taken
by certified measuring instruments (e.g. output meters, multimeters and
grid analysers); since the inverter
is not a measuring instrument
it has
wider tolerances for the measurements it makes.
The tolerances are generally:
±5% for real-time measurements with output power below 20%
±3% for real-time measurements with output power above 20%
±4% for all statistical data
