Parameter description
vacon • 76
Service support: find your nearest Vacon service center at www.vacon.com
4
4.13
Solar
4.13.1
Start Settings
P14.1 S
TART
DC V
OLTAGE
Start enable from solar condition needs that the DC voltage is above the threshold in P14.1.1
(at least for 5s).
P14.2 S
HORT
RESTART
DELAY
The drive starts and tries to reach minimum frequency. If this doesn't happen within a defined
time, the drive will stop and retry only after the short delay time P14.1.2 has elapsed.
P14.3 S
HORT
RESTART
DELAY
TRIES
P14.4 L
ONG
RESTART
DELAY
After a certain number of failed attempts (P14.1.3), the time between start attempts will
change to long delay time P14.1.4.
If the drive can run continuously for the same long delay time, next start attempts will begin
with short delay again. The same sequence is applied in case a running drive stops because of
a temporary decrease in solar power.
Note!
If the drive is supplied by mains, the drive is always enabled to start from external com-
mand.
4.13.2
MPPT
Generally, the MPP voltage of a panel is higher when the available power is high (good irradi-
ation, low temperature).
The output power to the motor is considered an indicator of the panel state: if the drive can pro-
gressively increase motor speed and get a good amount of power, it means that the panel has
basically “high” MPP voltage.
The DC voltage reference for the regulator is automatically changed by the MPP Tracker.
It results from four parallel algorithms:
-Feed-forward controller
-Correction controller
-Oscillation damping regulator
-Local Maxima logic
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