Emerson UNIDRIVE M600 - Page 60

60 Unidrive M600 Getting Started Guide
Issue Number: 2
Autotune
The drive is 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 whenever
possible so the measured value of power factor of the motor is
used by the drive.
• A stationary autotune can be used when the motor is
loaded and it is not possible to uncouple the load from the
motor shaft. A stationary autotune measures stator
resistance and transient inductance of the motor and values
relating to deadtime compensation from the drive. These
are required for good performance in vector control modes.
A stationary autotune does not measure the power factor of
the motor so the value on the motor nameplate must be
entered into Pr 00.043.
• A rotating autotune should only be used if the motor is
uncoupled. A rotating autotune first performs a stationary
autotune before rotating the motor at
2
/
3
base speed in the
direction selected. The rotating autotune measures the
power factor of the motor.
To perform an autotune:
•Set Pr 00.040 = 1 for a stationary autotune or set Pr 00.040
= 2 for a rotating autotune
• Close the Drive Enable signal (terminal 31). The drive will
display ’Ready’.
• Close the run signal (terminal 26 or 27). The upper row of
the display will flash ’Auto Tune’ while the drive is
performing the autotune.
• Wait for the drive to display ’Ready’ or ‘Inhibit’ and for the
motor to come to a standstill.
• Remove the drive enable and run signal from the drive.
Save
parameters
Select 'Save Parameters' in Pr mm.000 (alternatively enter a
value of 1000 in Pr mm.000) and press the red reset
button or toggle the reset digital input.
Run Drive is now ready to run
Action Detail
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.
WARNING
cos ∅
σ L
S
R
S
Unidrive M600 Getting Started Guide English Iss1.book Page 60 Friday, April 25, 2014 2:08 PM