Fronius Agilo 75.0 - Manual (Page 28)

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Data communication and Solar Net
Solar Net and
data interface
Overcurrent and
undervoltage cut-
out The data communications electronics have a cut-out function that interrupts the power sup-
ply in the Fronius Solar Net:
-
in response to overcurrent, e.g. in the event of a short circuit
- in response to undervoltage
The overcurrent and undervoltage cut-out does not depend on the current flow direction. If
the Fronius Solar Net measures a current flow > 3 A or a voltage < 6.5 V, the power supply
in the Fronius Solar Net is interrupted.
The power supply is restored automatically.
Description of the
'Fronius Solar
Net' LED The 'Fronius Solar Net' LED is on:
the power supply for data communication within the Fronius Solar Net is OK
The 'Fronius Solar Net' LED is off:
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)
- 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
external power unit to one of the DATCOM components.
To detect the presence of an undervoltage, check some of the other DATCOM com-
ponents as required.
The 'Fronius Solar Net' LED flashes briefly every 5 seconds:
following a shutdown as the result of an overcurrent or undervoltage, the inverter attempts
to restore the power supply to the Fronius Solar Net every 5 seconds while the fault per-
sists.
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 more than one inverter to be linked up using system add-ons.
It is a bus system. A single cable is all that is required for one or more inverters to com-
municate with all the system add-ons.
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 - Solar Electronics / Info & Support / Document downloads / Op-
erating instructions / System monitoring / Fronius DATCOM cabling guide.