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Buffer memory If the USB stick is unplugged (e.g. for data backup purposes), the logging data is written to
a buffer memory in the inverter.
As soon as the USB stick is plugged in again, the data is copied automatically from the buff-
er memory to the stick.
The buffer memory can store a maximum of six logging points. Data is only logged while
the inverter is running (output greater than 0 W). The logging interval is permanently set at
30 minutes. Data can be recorded on the buffer memory for a three-hour time period as a
result.
When the buffer memory is full, the oldest data in the memory will be overwritten by the
next batch of data.
IMPORTANT! The buffer memory requires a permanent power supply.
If there is a power failure while the inverter is in operation, all the data in the buffer memory
will be lost. To avoid losing data during the night, the automatic night switch-off facility must
be deactivated (switch the "Night Mode" setup parameter to ON - see the Datamanager
2.0 Operating Instructions, section "Setting and displaying the menu items", "Viewing and
adjusting parameters in the DATCOM menu item").
On the Fronius Eco or Fronius Symo 15.0-3 208, the buffer memory also functions with just
a DC supply.
Suitable USB
flash drives
Due to the variety of USB flash drives available on the market, it cannot be guaranteed that
every USB flash drive will be detected by the inverter.
Fronius recommends that only certified, industry-grade USB flash drives are used (look out
for the USB-IF logo).
The inverter supports USB flash drives with the following file systems:
- FAT12
- FAT16
- FAT32
Fronius recommends that the USB flash drives employed should only be used for record-
ing logging data or updating the inverter software. The USB flash drives should not contain
any other data.
USB symbol on the inverter display, e.g. in display mode 'NOW':
If the inverter detects a USB flash drive,
the USB symbol will appear in the top right
corner of the display.
When inserting a USB flash drive, check
whether the USB symbol is displayed (it
may also flash).
AC Output Power
NOW
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