24 • vacon
Description of parameters
Tel. +358 (0)201 2121 • Fax +358 (0)201 212 205
EXAMPLE:
What changes are required to start with load from 0 Hz?
First set the motor nominal values (Parameter group 2.1).
Option 1: Activate the Automatic torque boost.
Option 2: Programmable U/f curve
To get torque you need to set the zero point voltage and midpoint voltage/frequency (in
parameter group 2.6) so that the motor takes enough current at low frequencies.
First set par.
Programmable U/f curve
(value 2). Increase zero point voltage (
get enough current at zero speed. Set then the midpoint voltage (
) to 1.4142*ID606 and
midpoint frequency (
) to value ID606/100%*ID111.
NOTE!
In high torque – low speed applications – it is likely that the motor will
overheat. If the motor has to run a prolonged time under these condi-
tions, special attention must be paid to cooling the motor. Use external
cooling for the motor if the temperature tends to rise too high.
110
Nominal
voltage
of
motor
(2.1.6)
Find this value U
n
on the rating plate of the motor. This parameter sets the voltage at the field
weakening point (
) to 100% * U
nMotor
. Note also used connection Delta/Star.
111
Nominal
frequency
of
motor
(2.1.7)
Find this value f
n
on the rating plate of the motor. This parameter sets the field weakening point
) to the same value.
112
Nominal
speed
of
motor
(2.1.8)
Find this value n
n
on the rating plate of the motor.
113
Nominal
current
of
motor
(2.1.9)
Find this value I
n
on the rating plate of the motor.
115
Parameter
conceal
With this parameter you can hide all other parameter groups except the basic parameter group
(P2.1).
Note! The factory default of this parameter is 1, i.e. all parameter groups except P2.1 are
hidden. The other parameter groups cannot be browsed or edited before the value of this
parameter is set to 0.
0 = Disabled (all parameter groups can be browsed with the keypad)
1 = Enabled (only the basic parameters, P2.1, can be browsed with the keypad)
