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, setting the Drive enable = Off (0).

Autotune RFC-S mode There are three autotune tests available in RFC-S 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

•

The static autotune can be used when the motor is loaded and it is not possible to uncouple the load from the motor shaft. This test can be used

to measure all the necessary parameters for basic control. During the static autotune, a test is performed to locate the flux axis of the motor.

However this test may not be able to calculate such an accurate value for the A16 (Position Feedback Phase Angle C13) as compared to the

rotating autotune. The static test measures Stator Resistance (B34), Transient Inductance (B33), Maximum Deadtime Compensation (B46),

Current at Maximum Dead time Compensation (B47) and No Load Lq (B37). The stator resistance and the transient inductance are then used to

set-up the current loop gains. If sensorless mode is not selected then the position feedback phase angle is set-up for the position feedback

device. 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. This test can be used to measure all the necessary

parameters for the basic control. During the rotating autotune A18 (Motor Rated Current B02) is applied and the motor is rotated by 2 electrical

revolutions (i.e. up to 2 mechanical revolutions) in the required direction. If sensorless mode is not selected then the A16 (Position Feedback

Phase Angle C13) is set-up for the position feedback device. A static test is performed to measure Stator Resistance (B34), Transient Inductance

(B33), Maximum Deadtime Compensation (B46), Current at Maximum Dead time Compensation (B47) and No Load Lq (B37). The stator

resistance and transient inductance are used to set-up the current loop gains. This is only done once during the test so the user can make further

adjustments to the current controller gains if required. 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

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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

rotating test is performed in which the motor is accelerated with the currently selected ramps up to the currently selected speed reference, and

this speed is maintained for the duration of the test. The resultant motor and load inertia is stored in Inertia Compensation Total Inertia (E15). To

perform the autotune enter 3 (Inertia) into the parameter, followed by a Drive enable and run signal.

Following the completion of an autotune test the drive will go into the inhibit state. The drive must be disabled before it can be re-enabled and made

to run. The drive can be disabled by removing the Drive enable signal from control terminal 31, setting the Drive enable = Off (0).

A27 {B26}

Reverse Motor Phase Sequence

Bit

RFC-A

Off (0) On (1)

RFC-S

A27 (Reverse Motor Phase Sequence B26)

If reverse motor phase sequence = Off (0) the output motor phase sequence is U V W, when the output frequency is positive and W V U when the

output frequency is negative. If Reverse motor phase sequence = On (1) the output motor phase sequence is reversed so that the phase sequence is

W V U for positive output frequencies and U V W for negative output frequencies.

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