Monitoring 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 sufcient
solar radiation. At this point, the luminous LEDs on the LED panel will
indicate this state.
User interface mode
The inverter is able to provide information about its operation through the
following instruments:
• Warning lights (luminous LEDs)
• Data transmission on the dedicated RS485 serial line. The data can be
collected by a PC or a data logger equipped with an RS485 port. Contact
the ABB support service with any queries about device compatibility.
Types of data available
The inverter provides two types of data, which can be retrieved through
the special interface software.
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 is necessary for proces-
sing statistical data and an error log with time marking.
Measurement tolerance
The data supplied by the inverter may differ from measurements taken
by certied 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% of nomi-
nal power
±3% for real-time measurements with output power above 20% of nomi-
nal power
±4% for all statistical data.
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