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Safety
Product
Mechanical
information
information
installation
Autotune Open loop mode There are two autotunes available in open loop mode a static and rotating test. A rotating autotune should be used
whenever possible so the measured value of power factor of the motor can be used by the drive.
Value
0
1
2
•
A static autotune can be used when the motor is loaded where it is not possible to remove the load from the motor shaft. The static test measures
Stator Resistance (B34), Transient Inductance (B33), Maximum Deadtime Compensation (B46), Current At Maximum Deadtime Compensation
(B47), all of which are required for good performance in vector control modes. The static autotune does not measure the power factor of the
motor, so the value on the motor nameplate must be entered into the parameter Motor Rated Power Factor (B04). To perform the autotune enter
1 (Static) into the parameter followed by a Drive enable and run signal.
•
A rotating autotune should only be used if the motor is unloaded and the lift de-roped. A rotating autotune first performs a static autotune as
above, then a rotating autotune is performed where the motor is accelerated with the set ramps up to a frequency of A21 Motor Rated Frequency
(B06) x 2/3, and the frequency is maintained at that level for 4 seconds. Stator Inductance (B35) is measured and this value is used in conjunction
with other motor parameters to calculate the Motor Rated Power Factor (B04). To perform the autotune, enter 2 (Rotating) into the parameter
followed by a Drive enable and run signal.
When a rotating auto tune is being carried out it is the responsibility of the authorized person to ensure they have read the auto tune
instructions and are fully aware of its operation. Also ensure that it is safe to remove (lift) the motors brake with no risk of loss of control.
Ensure during this process there is no load on the motor (or the system is balanced to avoid uncontrolled operation) and there is sufficient
distance for the car to move within the lift shaft when the rotating auto tune is being carried out to avoid the risk of damage to the system.
WARNING
Following the completion of an autotune test, the drive will go into the inhibit state. The drive must be disabled before the drive can be re-enabled and
made to run. The drive can be disabled by removing the Drive enable signal from control terminal 31 by setting the Drive enable = Off (0).
Autotune RFC-A mode There are three autotunes available in RFC-A mode, a static test, a rotating test and a test to measure motor and load
inertia. A static autotune will give good performance and a rotating autotune will give improved performance as it measures the actual values of the
motor parameters required by the drive.
Value
0
1
2
3
NOTE
It is highly recommended that a rotating autotune is performed which will provide good performance. Before this is done, the motor should be
unloaded and the lift de-roped.
•
A static autotune can be used when the motor is loaded and it is not possible to remove the load from the motor shaft. The static autotune
measures the Stator Resistance (B34) and Transient Inductance (B33) of the motor, Maximum Deadtime Compensation (B46), Current At
Maximum Dead Time Compensation (B47). The stator resistance and transient inductance are then used to calculate the current loop gains, and
at the end of the test the current loop gains are updated. A static autotune does not measure the power factor of the motor, so the value on the
motor nameplate must be entered into Motor Rated Power Factor (B04). To perform a static autotune enter 1 (Static) into the parameter followed
by a Drive enable and run signal.
•
A rotating autotune should only be used if the motor is unloaded and the lift de-roped. A rotating autotune first performs a static autotune, a
rotating test is then performed where the motor is accelerated with the set ramps up to a frequency of A21 Motor Rated Frequency (B06) x
and the frequency is maintained at the level for up to 40 s. During the rotating autotune, the Stator Inductance (B35) and the motor saturation
breakpoints are modified by the drive. The power factor is also modified for user information only, but this is not used after this point as the stator
inductance is used in the vector control algorithm instead. To perform the autotune enter 2 (Rotating) into the parameter followed by a Drive
enable and run signal.
When a rotating auto tune is being carried out it is the responsibility of the authorized person to ensure they have read the auto tune
instructions and are fully aware of its operation. Also ensure that it is safe to remove (lift) the motors brake with no risk of loss of control.
Ensure during this process there is no load on the motor (or the system is balanced to avoid uncontrolled operation) and there is sufficient
distance for the car to move within the lift shaft when the rotating auto tune is being carried out to avoid the risk of damage to the system.
WARNING
•
The inertia autotune measures the mechanical characteristic of the motor and load by rotating the motor at the speed defined by the present
speed reference and injecting a series of speed test signals. This test should only be used provided all the basic control parameters have been
set-up correctly and the speed controller parameters should be set to conservative levels, such as the default values, so that the motor is stable
when it runs. The test measures the motor and load inertia, which can be used in producing a torque feed-forward term. If Mechanical Load Test
Level (B49) is left at its default value of zero then the peak level of the injection signal will be 1% of the maximum speed reference subject to a
maximum of 500 rpm. If a different test level is required then Mechanical Load Test Level (B49) should be set to a non-zero value to define the
level as a percentage of the maximum speed reference, again subject to a maximum of 500 rpm. The user defined speed reference which defines
the speed of the motor should be set to a level higher than the test level, but not high enough for flux weakening to become active. In some cases
however, it is possible to perform the test at zero speed provided the motor is free to move, but it may be necessary to increase the test signal
from the default value. The test will give the correct results when there is a static load applied to the motor and in the presence of mechanical
damping. This test should be not be used, however for sensorless mode, or if the speed controller cannot be set-up for stable operation. A
E300 Design Guide
Issue Number: 1
Electrical
Getting
User Menu
installation
started
A
Autotune
No autotune being requested
Static autotune
Rotating autotune
Autotune
No autotune being requested
Static autotune
Rotating autotune
Inertia autotune
Advanced
Commissioning
Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
2
/
,
3
141
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