Parameters
vacon • 181
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
ognizes oscillation in DC voltage and quickly increases the voltage reference correction term. This
brings the panels back in “voltage source” branch.
P3.22.2.14 D
AMPING
SENSITIVITY
P3.22.2.14 parameter determines the amplitude of oscillation, to be recognized.
If the value is too low, normal variation in voltage level could be considered oscillation, and the DC
voltage reference incorrectly increased.
P3.22.2.15 D
AMPING
TIME
Oscillation is recognized when the logic sees three maximum and minimum point during the time
defined by P3.22.2.15.
If the time is too short, the logic could fail with slow oscillations.
If the time is too long, spaced and unrelated min and max points could be confused with an oscilla-
tion.
P3.22.2.16 M
INIMUM
DC V
OLTAGE
The value depends on the voltage range.
The value (+ 5 V) is also used as the minimum limit for the DC voltage related parameters P3.22.1.1,
P3.22.2.1, P3.22.2.2.
7.2.24
Dual supply parameters
Common settings
P3.24.1.1
AC V
OLTAGE
Nominal voltage of AC grid.
V3.24.1.2
N
OMINAL
DC V
OLTAGE
Monitor of calculated value of nominal DC voltage, when supply is from AC grid.
P3.24.1.3
D
UAL
S
UPPLY
M
ODE
0 - Always active
1 - Closed loop Irradiation
2 - Closed loop Sensorless
P3.24.1.4
DC O
FFSET
FOR
AC O
FF
Offset added to M3.24.1.1, as DC voltage threshold above which AC can be switched Off. If DC value
is above threshold, it means that the PV modules can sustain the full power, in present motor work-
ing condition.
Table 146.
Voltage range
Value
Default
230 VAC
230–300 V
230 V
400/500 VAC
300 (new xml)/410 (old xml)–600 V
410 V
525/690 VAC
530–800 V
530 V
