User guide
50 Unidrive M700 Getting Started Guide
Issue Number: 5
Set
acceleration
/
deceleration
rates
Enter:
• Acceleration rate in Pr 00.003 (s/1000 rpm)
• Deceleration rate in Pr 00.004 (s/1000 rpm) (If braking resistor
installed, set Pr 00.015 = FAST. Also ensure Pr 10.030, Pr 10.031
and Pr 10.061 are set correctly, otherwise premature ‘Brake R Too
Hot’ trips may be seen).
Autotune
The drive is able to perform either a stationary or a rotating auto-tune.
The motor must be at a standstill before an auto-tune is enabled. A
stationary auto-tune will give moderate performance whereas a rotating
auto-tune will give improved performance as it measures the actual
values of the motor parameters required by the drive.
• A stationary auto-tune can be used when the motor is loaded and it
is not possible to uncouple the load from the motor shaft. The
stationary auto-tune measures the stator resistance and transient
inductance of the motor. These are used to calculate the current
loop gains, and at the end of the test the values in Pr 00.038 and Pr
00.039 are updated. A stationary auto-tune 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 auto-tune should only be used if the motor is uncoupled.
A rotating auto-tune first performs a stationary auto-tune before
rotating the motor at
2
/
3
base speed in the direction selected. The
rotating auto-tune measures the stator inductance of the motor and
calculates the power factor.
To perform an auto-tune:
•Set Pr 00.040 = 1 for a stationary auto-tune or set Pr 00.040 = 2 for
a rotating auto-tune
• Close the drive enable signal (terminal 31). The drive will display
’Ready’.
• Close the run signal (terminal 26 or 27). The lower display will flash
‘Autotune’ while the drive is performing the auto-tune.
• 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 red reset button or toggle the reset
digital input.
Run Drive is now ready to run
Action Detail
1000rpm
0.03
t
0.04
A rotating auto-tune 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
T
Nm
N rpm
saturation
break-
points
R
S
L
S