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Data communication and Solar Net
Fronius Solar Net
and data interface
Description of the
'Fronius Solar
Net' LED
The 'Solar Net' LED is on:
the power supply for data communication within the Fronius Solar Net / interface protocol
is OK
The 'Solar Net' LED flashes briefly every 5 seconds:
data communication error in the Fronius Solar Net
-
Overcurrent (current flow > 3 A, e.g. resulting from a short circuit in the Fronius Solar
Net ring)
-
Undervoltage (not a short circuit, voltage in Fronius Solar Net < 6.5 V, e.g. if there are
too many DATCOM components on the Fronius Solar Net and not enough electrical
power is available)
In this case, power for the DATCOM components must be supplied by connecting an
additional power supply to one of the DATCOM components.
To detect the presence of an undervoltage, check some of the other DATCOM com-
ponents for faults as required.
After cutting out because of overcurrent or undervoltage, the inverter attempts to restore
the power supply in the Fronius Solar Net every 5 seconds while the fault is still present.
Once the fault is rectified, power to the Fronius Solar Net will be restored within 5 seconds.
Fronius Solar Net was developed to make system add-ons flexible and capable of being
used in a wide variety of different applications. Fronius Solar Net is a data network that
enables multiple inverters to be linked up using system add-ons.
It is a bus system that uses a ring topology. One cable is sufficient for communication be-
tween one or several inverters that are connected on the Fronius Solar Net using a sys-
tem add-on.
Fronius Solar Net automatically recognises a wide variety of system add-ons.
In order to distinguish between several identical system add-ons, each one must be as-
signed a unique number.
Similarly, every inverter on the Fronius Solar Net must be assigned a unique number.
Refer to the section entitled 'The Setup menu' for instructions on how to assign a unique
number.
More detailed information on the individual system add-ons can be found in the relevant
operating instructions or on the internet at http://www.fronius.com.
More detailed information on cabling DATCOM components can be found at:
http://www.fronius.com/QR-link/4204101938
