51
G
G
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Programming
0255
0255 CONF. F
MIN
Operation at minimum frequency
f -> 0
Possible settings: f->0 or f->f
min
f->0: After reaching the required pressure with no demand the frequency drops to the selected MINIMUM
FREQUENCY [0250] and the HYDROVAR will continue to run for the selected F
MIN
TIME [0260]. After this
time the HYDROVAR will stop automatically.
f->f
min
: The pump will never stop automatically. The frequency will only drop down to the selected MINI-
MUM FREQUENCY [0250]. To stop the pump the external ON/OFF (E-stop) must be opened or the ▼ (Stop)
button must be pressed.
Applications: circulation systems
Caution: The setting f->f
min
can overheat the pump if there is no flow through the pump.
Use when there is a bypass line for circulation pumps!
0260
0260 F
MIN
TIME
Delay time before shut off below MIN. FREQ.
0 s
Possible settings: 0 – 100 sec
After running below MIN. FREQ.for this selected time, the pump will stop if parameter CONFIG. FMIN
[0255] is set to f -> 0.
0265
0265 BOOST
Motor starting voltage in % of connected supply voltage
5 %
Possible settings: 0 – 25% of the input voltage
This parameter determines the characteristics of the voltage/frequency curve. In particular, it refers to the
voltage increase during startup as a percentage of the nominal voltage. This setting should be kept as low
as possible to protect the motor from thermal overload at lower frequencies. If the boost is set too low, a
failure (OVERLOAD) may occur because the starting current is too high.
0270
0270 KNEE FRQ.
Knee frequency
60.0 Hz
Possible settings: 30.0 – 90.0 Hz
This parameter determines the frequency at which the HYDROVAR generates its maximum output voltage
(value of the connected input voltage). For standard applications this frequency should be set to MAX.
FRQ. [0245] (Default Setting 60Hz).
Caution
This parameter should rarely be adjusted! Incorrect setting can cause an overload
error and damage to the motor. Contact factory before changing.
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