Emerson Unidrive HS72 Control Getting Started Manual page 39

Action
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
stationary autotune will give moderate performance whereas a rotating
autotune will give improved performance as it measures the actual
values of the motor parameters required by the drive.
NOTE
WARNING
Autotune
To perform an auto-tune:
• 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' or 'Inhibit'.
• Close the run signal (terminal 26 or 27). The lower display will flash
'Autotune' 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.
Select 'Save Parameters' in Pr mm.000 (alternatively enter a value of
Save
1000 in Pr mm.000) and press red
parameters
digital input.
Run Drive is now ready to run
Unidrive M702 / HS72 Control Getting Started Guide
Issue Number: 2
It is highly recommended that a rotating autotune is performed
(Pr 00.040 set to 2).
A rotating autotune will cause the motor to accelerate up to
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.
Detail
reset button or toggle the reset
2
/
3
cos ∅
R
S
σL
S
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