Control Techniques Commander SE11200025 Guia Del Usuario página 62

Parameter 06 - motor rated current
Parameter 07 - motor rated speed
Before a rotating autotune is carried out, additional parameters should be correctly set
(this is only true if the motor is not a standard 50/60Hz motor).
Parameter 39 - motor rated frequency Parameter 02 - maximum speed
Although parameter 38 is defaulted to 'no autotune', on the very first power up, Enable
and Run command of the drive after delivery from the factory, the drive will initiate a
non-rotating static autotune. After this test, the autotune will be dependent on the value
set in parameter 38. The results of this test will depend on what is connected to the
drive's motor terminals.
When default parameters are set (see parameter 29) the first time the drive is given
NOTE
an Enable and Run command, a non-rotating autotune will be initiated.
No motor connected
With no motor connected, the drive will trip on 'rS' which indicates a stator resistance
measurement failure. This will be stored in the drive as zero ohms. The trip can be reset
and the drive run as normal. If the drive is powered down and then back up, after an
enable and run signal, it will again perform a non-rotating static autotune and trip on 'rS'.
Motor connected but stator resistance higher than allowable value
The drive will again trip on 'rS' if the stator resistance being measured is greater than
the drive's internal maximum limit. This can happen if a star connected motor is
connected to a 200V Commander SE or a motor of a lower kW rating is connected to a
larger kW Commander SE. In this case, the drive will store the maximum allowable
stator resistance for that size of drive. If the drive is powered down and then back up,
after an enable and run signal, it will not perform another autotune.
Motor connected but current levels required for successful autotune not reached
The drive will trip on 'rS' if the current levels required to measure the stator resistance
are not reached in the allowable test time. This will be stored in the drive as zero ohms.
This can occur because a combination of stator resistance and motor voltage prevents
the required current levels being reached. If the drive is powered down and then back
up, after an enable and run signal, it will again perform a non-rotating static autotune.
The current levels required for a successful autotune are both half and full motor rated
current (parameter 06). Two measurements are taken to ensure accurate results.
Important Notes:
It is important to ensure that the motor wiring configuration is correct (i.e. Star /
NOTE
Delta) before performing an autotune.
If any changes are made to the drive's motor map parameters, system wiring,
NOTE
motor wiring configuration or motor type, the drive must be re-autotuned to the
motor. Not performing another autotune will result in poor motor performance,
OI.AC or It.AC trips.
No. Function
Rated
39
frequency
Enter the motor rated frequency (taken from motor rating plate).
Defines the voltage to frequency characteristic applied to the motor.
62
Type Limitations
RW U
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Parameter 08 - motor rated voltage
Parameter 09 - motor power factor
Range Units
0 - 1000.0 Hz
Commander SE User Guide
Defaults
50.0 EUR
60.0 USA
Issue Number 9