Aros NETMAN204 SOLAR, Installation And User Manual

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It’s easy to adapt virtually to any external RS-485 device, as you can change the register address,
the number of words necessary to get the value, the endianness and the divider. You can also select
the power reduction function; this will allow the user to scan the network and look for inverters in the
same plant to make the external measure drive them all as a whole.
Let’s make an example.
If we have three inverters on a network and they have the same plant name, they will be found by the
master device (the one that has the external measure).
Once the master has defined:
1. The inverters in the same plant
2. The total power of the plant
it will send the percentage of power that each inverter has to inject to the grid to fulfill the requested
power from the external measure. The percentage of power is sent on the LAN ten (10) times each
second, so that the slave inverters can almost instantly adapt to the conditions required.
To activate the Power Reduction Function, the user has to select “Power Reduction” checkbox and
hit the Apply button. A Radar button is now present on the screen, pressing this one the user can
access the scan function:
The user has to press the scan button on the right to activate this function (button with magnifying
lens).
In this simple case, only one inverter has been found. If more inverters have the same plant name,
they will appear in the list and the sum of the total power will be shown.
From this moment on, this scan will be done by the master automatically in background; this means
that if in the future a new inverter is added and has the same plant name, the total power is
recalculated on the fly and the value of the percentage will be adequately broadcasted.
Likewise, if an inverter is shut down or has its plant name changed, the master will change the
percentage to face the new situation. See the Power Reduction Kit manual for the details.