Parameters
vacon • 177
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
7.2.23
Solar
7.2.23.1
Start Settings
P3.22.1.1 S
TART
DC V
OLTAGE
Start enable from solar condition needs that the DC voltage is above the threshold in P3.22.1.1 (at
least for 5s).
P3.22.1.2 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 P3.22.1.2 has elapsed.
P3.22.1.3 S
HORT
RESTART
DELAY
TRIES
P3.22.1.4 L
ONG
RESTART
DELAY
After a certain number of failed attempts (P3.22.1.3), the time between start attempts will change
to long delay time P3.22.1.4.
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 tempo-
rary decrease in solar power.
Note!
If the drive is supplied by mains, the drive is always enabled to start from external command.
7.2.23.2
MPPT
Generally, the MPP voltage of a panel is higher when the available power is high (good irradiation,
low temperature).
The output power to the motor is considered an indicator of the panel state: if the drive can progres-
sively 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
