9
Closed LoopStart-up continued
•A stationary autotune can be used when the motor is loaded
and it is not possible to remove the load from the motor
shaft.A stationary autotune does not measure the power
factor of the motor so the value on the motor nameplate
must be entered into Pr 0.43
•A rotating autotune should only be used if the motor is
unloaded or the load is uncoupled
To perform an autotune:
•Set Pr 0.40 = 1 for a stationary autotune or set Pr 0.40 = 2
for a rotating autotune
•Close the Drive Enable signal (terminal 31).The drive will
display‘rdY’
•Close the run signal (terminal 26 or 27).The lower display
will flash‘Auto’ and‘tunE’ alternatively, while the drive is
performing the autotune.
•Wait for the drive to display‘rdY’ and for the motor to come
to a standstill
Remove the run signal from the drive.
Run
•Drive is now ready to run
Set acceleration/deceleration rates
•Acceleration rate in Pr 0.03 (s/1000rpm)
•Deceleration rate in Pr 0.04 (s/1000rpm) (If braking resistor
fitted, set Pr 0.15 = FAST.)
Autotune
Unidrive 6is able to perform either a stationary or a rotating
autotune.The motor must be at a standstill before an autotune is
enabled.A rotating autotune should be used wherever possible.
WARNING: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 run
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.
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