User guide
62 Unidrive SP Short Form Guide
www.controltechniques.com Issue Number: 2
7.2.3 Closed loop vector mode
Induction motor with incremental encoder feedback
For simplicity only an incremental quadrature encoder will be considered here. For
information on setting up one of the other supported speed feedback devices, refer to
Setting up a feedback device in the Unidrive SP User Guide on the CD Rom supplied
with the drive.
Action Detail
Before
power-up
Ensure:
• Drive Enable signal is not given (terminal 31)
• Run signal is not given
• Motor and feedback device are connected
Power-up
the drive
Verify that Closed Loop mode is displayed as the drive powers up. If
the mode is incorrect see section 5.6 Changing the operating
mode
on page 45.
If a motor thermistor is not connected and the drive trips on ‘th’ set
Pr 0.21 = VOLt and press the red reset button.
Ensure:
• Drive displays ‘inh’
If the drive trips, see Chapter 10 Diagnostics on page 107.
Size 0 only: If no internal braking resistor is installed then the drive will
trip ‘br.th’. If no internal braking resistor is required then set Pr 0.51 to 8
to disable the trip.
Set motor
feedback
parameters
Incremental encoder basic set-up
Enter:
• Drive encoder type in Pr 3.38 = Ab (0): Quadrature encoder
• Encoder power supply in Pr. 3.36 = 5V (0), 8V (1) or 15V (2)
• Drive encoder Lines Per Revolution (LPR) in Pr 3.34 (set
according to encoder)
• Drive encoder termination resistor setting in Pr. 3.39:
0 = A-A\, B-B\, Z-Z\ termination resistors disabled
1 = A-A\, B-B\, termination resistors enabled, Z-Z\ termination
resistors disabled
2 = A-A\, B-B\, Z-Z\ termination resistors enabled
Enter motor
nameplate
details
Enter:
• Motor rated frequency in Pr 0.47 (Hz)
• Motor rated current in Pr 0.46 (A)
• Motor rated speed (base speed - slip speed) in Pr 0.45 (rpm)
• Motor rated voltage in Pr 0.44 (V) - check if or connection
Set
maximum
speed
Enter:
• Maximum speed in Pr 0.02 (rpm)
Set
acceleration
/
deceleration
rates
Enter:
• Acceleration rate in Pr 0.03 (s/1000rpm)
• Deceleration rate in Pr 0.04 (s/1000rpm) (If braking resistor
installed, set Pr 0.15 = FAST. Also ensure Pr 10.30 and Pr 10.31
are set correctly, otherwise premature ‘It.br’ trips may be seen.)
Setting the encoder voltage supply too high for the
encoder could result in damage to the feedback device.
CAUTION
Mot X XXXXXXXXX
No XXXXXXXXXX kg
IP55 I.cl F C 40 s S1
°
VHzmin
-1
kW cos
φ
A
230
400
50 1445 2.20 0.80 8.50
4.90
CN = 14.5Nm
240
415
50 1445 2.20 0. 76 8.50
4.90
CN = 14.4Nm
CTP- VEN 1PHASE 1=0,46A P=110W R.F 32MN
I.E.C 34 1(87)
0.02
t
1000rpm
0.03
t
0.04