34 Unidrive M100-101 Quick Start Guide
Issue Number: 6
Defines the maximum switching frequency that can be used by the drive.
See the Drive User Guide for drive derating data.
Defines the auto-tune test to be performed.
There are two autotune tests available in open loop mode, a stationary and a rotating test. A rotating
autotune should be used whenever possible so the measured value of power factor of the motor is
used by the drive.
1. A stationary autotune can be used when the motor is loaded and it is not possible to remove the
load from the motor shaft. To perform a Stationary autotune, set Pr 00.038 to 1,
2. A rotating autotune should only be used if the motor is unloaded. A rotating autotune first
performs a stationary autotune, as above, then a rotating test is performed in which the motor is
accelerated with currently selected ramps up to a frequency of Rated Frequency (00.039) x 2/3,
and the frequency is maintained at that level for 4 seconds. To perform a Rotating autotune, set
Pr 00.038 to 2.
Following the completion of an autotune test the drive will go into the inhibit state. The drive must be
placed into a controlled disable condition before the drive can be made to run at the required
reference. The drive can be put in to a controlled disable condition by removing the signal from
terminal 11, setting the Drive Enable to OFF (0). For further information, refer to the Drive User Guide
00.037 {05.018} Maximum Switching Frequency
RW Txt US
OL
Ú
0.667 (0), 1 (1), 2 (2), 3 (3), 4 (4),
6 (5), 8 (6), 12 (7), 16 (8) kHz
Ö
3 (3) kHz
Pr 00.037 Text Description
0 0.667 667 Hz switching frequency
1 1 1 kHz switching frequency
2 2 2 kHz switching frequency
3 3 3 kHz switching frequency
4 4 4 kHz switching frequency
5 6 6 kHz switching frequency
6 8 8 kHz switching frequency
7 12 12 kHz switching frequency
8 16 16 kHz switching frequency
00.038 {05.012} Autotune
RW Num NC US
OL
Ú
0-2
Ö
0
A rotating autotune will cause the motor to accelerate up to 2/3 base speed in the
direction selected regardless of the reference provided. Once complete the motor will
coast to a stop. The enable signal must be removed before the drive can be made to run
at the required reference.The drive can be stopped at any time by removing the run
signal or removing the drive enable.
Unidrive M100 101 Quick Start Guide English Iss6.book Page 34 Wednesday, September 9, 2015 4:07 PM
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