Setting Parameters
01/02 AWB8230-1415GB
172
X
Then, under PNU H003, enter the motor rating and under
PNU H004 the number of motor poles.
X
Under PNU A001, enter the value 02, so that the setpoint
frequency can be set using PNU A020.
X
Under PNU A003, enter the base frequency (default: 50 Hz) and
then, under PNU A020, the setpoint frequency. If this para-
meter is set to 0 Hz, autotuning can not be carried out.
X
Under PNU A082, enter the motor voltage for the AVR function.
X
Because DC braking must not be used, enter the value 00 under
PNU A051.
X
Under PNU H001, select the autotuning mode: If the motor can
be run to determine the autotuning data, enter 01 here (during
autotuning, the motor is accelerated up to 80 % of its base
frequency); if autotuning is to be carried out without running
the motor, enter 02.
To start autotuning, issue the start signal (for example with the ON
key). To determine the motor data, autotuning first applies AC and
DC voltage to the stationary motor.
If you have entered 02 under PNU H001, two further autotuning
runs with motor operation are carried out: First, the motor is acce-
lerated to 80 % of the base frequency specified under PNU A003
and decelerated again to standstill; then, the motor is accelerated
again, but this time to the setpoint frequency entered under
PNU A020.
If autotuning is interrupted during data acquisition because of
• power failure,
• operation of the Off key, or
• interruption of the On signal,
the frequency inverter has to be reset to its default settings
(
a
Section “Initialization“, Page 165).
Under PNU H002, specify whether you want to use the standard
motor data, the standard autotuning data or the adaptive autotu-
ning data.
Standard autotuning
Autotuning is carried out once after the start signal is issued and
the corresponding values are written to PNU H030 to H034 (or
PNU H230 to H234 if PNU H002 is set to 01).
Adaptive autotuning
Due to the heat generated by the motor during operation, the
motor constants
R
1
may change. With this function, these
constants can be re-read when the motor is at standstill. This is
achieved by applying a DC voltage to two motor windings for up
to five seconds. If a start signal is received during that time, this
has priority over the adaptive autotuning procedure.
X
Carry out standard autotuning once.
X
Activate adaptive autotuning by entering 02 Under PNU H002.
X
Deactivate standard autotuning by entering 00 under
PNU H001.
X
Issue a start signal (for example with the ON key).
Let the motor run until it has reached its operating temperature.
X
Issue a stop signal (for example with the OFF key) and wait five
seconds before issuing another command.
If you are actuating an external brake, adaptive autotuning is
carried out only after actuation of the brake.
The running characteristics of unstable motors can be improved
with PNU H006. If the motor is running unstably, check first
whether the set motor rating (PNU H003) and the set number of
poles (PNU H004) corresponds with the connected motor. If the
rating of the connected motor exceeds the output power of the
frequency inverter, reduce the stability constant. If the motor is
running poorly, you can also reduce the pulse frequency
(PNU b083) or change the output voltage (PNU A045).
Warning!
Make sure that it is admissible to run the motor. The
frequency inverter runs the motor for a few seconds in
both directions without torque limitation.
h
You should activate adaptive autotuning only after you
have carried out standard autotuning.
h
If a new start signal is issued after the five seconds, adap-
tive autotuning is terminated. No new message appears
on the display and the data for the last acquisition
remains saved.
Once autotuning is completed
successfully, the following
message appears on the LED
display:
If an error has occurred during
autotuning, the following is
displayed:
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