Installation and commissioning
DIGIDRIVE
Variable speed drive
Réf. 3218 GB - 4.33 / d - 02.02
LEROY-SOMER
67
:Switching frequency
Adjustment range : 3 Hz
6 kHz
12 kHz
Factory setting : 6 kHz
Sets the PWM switching frequency.
CAUTION:
• If the temperature of the heatsink or the
IGBTs is too high, the drive
automatically reduces the switching
frequency.
• A high switching frequency reduces
the magnetic noise, however it
increases the motor temperature rise
and the level of radio frequency
interference emission, and reduces the
starting torque.
:Selection of autocalibration
Adjustment range : 0 to 2
Factory setting : 0
0: no autocalibration
1: measurement of the motor
characteristics at standstill (stator
resistance and voltage offset).
Procedure:
- Check that the motor parameters have
been programmed (see section 4.7.2).
- Unlock the drive (close terminal 9).
- Give a jog command (close then open
terminal 11 or 12). The right-hand display
indicates "Auto" and "tunE" alternately.
Wait for the display to stabilise on "0
0
.
.
0
0
".
The motor is then ready to operate
normally.
Parameter 3
3
8
8
returns to 0 as soon as
autocalibration has been completed.
CAUTION:
This autocalibration is performed
automatically even though 3
3
8
8
= 0, in the
following cases:
- initial commissioning of the drive
- return to factory settings, after the
drive has been unlocked (terminal 9
closed) and a run command given.
2: measurement of the motor
characteristics during rotation (stator
resistance, voltage offset, magnetising
current, leakage inductance and power
factor). This mode gives optimum
performance levels.
Procedure:
- Check that the motor parameters have
been programmed (see section 4.7.2).
- Unlock the drive (close terminal 9).
- Give a jog command (close then open
terminal 11 or 12).
The motor performs one FWD rotation
(even if a REV command has been given),
then stops. During autocalibration, the
right-hand display indicates "Auto" and
"tunE" alternately. Wait for the display to
stabilise on "0
0
.
.
0
0
". The motor is then ready
to operate normally.
Parameter 3
3
8
8
returns to 0 as soon as
autocalibration has been completed.
• Measurements taken when 3
3
8
8
= 2
must be performed with the motor
uncoupled as the drive drives the
motor at 2/3 its rated speed.
Check that this operation does not
present any safety risks, and ensure
that the motor is stopped before the
autocalibration procedure.
• After modifying the motor
parameters, repeat autocalibration.
:Motor rated frequency
Adjustment range : 0 to 1000.0 Hz
Factory setting : Eur = 50.0 Hz
USA = 60.0 Hz
This is the point at which motor operation
changes from constant torque to constant
power.
During standard operation, it is the
frequency indicated on the motor
nameplate.
3
3
7
7
3
3
8
8
3
3
9
9
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