Unidrive M702 / HS72 Control Getting Started Guide 39
Issue Number: 4
Safety information Introduction Control connections Getting started
Basic parameters
(Menu 0)
Running the motor Further information
Motor
Thermistor
Set-up
The motor thermistor connection may be made either:
Through the drive encoder port (terminal 15)
• Select thermistor type in P1 Thermistor Type (03.118)
•Set P1 Thermistor Fault Detection (
03.123
) to either Temperature (1) or
Temp or Short (2)
Through terminal 8 (Digital Input 5 / Analog Input 3) of the control terminals
(requires a drive with date code 1710 or later and control firmware
V01.13.00.00 or later).
• Change Analog Input 3 Mode (07.015) from Disable (0) to either Therm
Short Cct (7) or Thermistor (8).
• Select the thermistor type in Analog Input 3 Thermistor Type (07.046)
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 Pr00.040 = 1 for a stationary auto-tune or set Pr 00.040 = 2 for a
rotating auto-tune
• Close the drive enable signal (terminal 11 and 13). The drive will display
‘Ready’.
• Close the run signal (terminal 7 or 8). 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
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.
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