Emerson Unidrive HS72 - Page 38

38 Unidrive M702 / HS72 Control Getting Started Guide
Issue Number: 2
6.2.3 RFC-A mode (Sensorless control)
Induction motor with sensorless control
Action Detail
Before
power-up
Ensure:
• The drive enable signal is not given (terminal 31)
• Run signal is not given
• Motor is connected
Power-up the
drive
Verify that RFC-A mode is displayed as the drive powers up. If the mode
is incorrect see section 4.7 Changing the operating mode on page 19.
Ensure:
Drive displays ‘Inhibit’
Select RFC-A
(Sensorless
control) mode
•Set Pr 03.024 = 1 or 3 to select RFC-A Sensorless mode
•Set Pr 03.040 = 0000 to disable the wire break
Motor
thermistor
set-up
If a thermistor is connected to terminal 8, then the Analog Input 3 Mode
(07.015) parameter must be set to Thermistor Short Cct (7), Thermistor
(8) or Therm No Trip (9).
Enter motor
nameplate
details
• Motor rated frequency in Pr 00.047 (Hz)
• Motor rated current in Pr 00.046 (A)
• Motor rated speed in Pr 00.045 (rpm)
• Motor rated voltage in Pr 00.044 (V) - check if or connection
Set max
speed
Enter:
• Maximum frequency in Pr 00.002 (rpm)
Set accel. /
decel. rates
• 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).
Select or
deselect
catch a
spinning
motor mode
If catch a spinning motor mode is not required then set Pr 06.009 to 0.
If catch a spinning motor mode is required then leave Pr 06.009 at the
default of 1, but depending on the size of the motor the value in
Pr 05.040 may need to be adjusted.
Pr 05.040 defines a scaling function used by the algorithm that detects
the speed of the motor. The default value of Pr 05.040 is 1 which is
suitable for small motors (<4 kW). For larger motors the value in
Pr 05.040 will need to be increased.
The thermistor input will be disabled until Pr 07.015 is set to
one of the above.
NOTE
Mot X XXXXXX XXX
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
100Hz
0.03
t
0.04
Unidrive M702_HS72 Control GSG Iss2.book Page 38 Friday, December 12, 2014 1:05 PM