03/12 EM-ABS-01 for ACU 103
• Set parameter Current limit 728 of the speed controller to a lower current val-
ue
(e. g. 10% of rated motor current). In this way it is made sure that there
are no excessive currents of the offset is set incorrectly.
• Turn motor shaft manually. Check the sense of rotation of the encoder via the
actual value of parameter
Encoder 2 Frequency 219. In the case of a clock-
wise rotation of the motor shaft, positive values are displayed for the actual
frequency value. If the displayed sense of rotation does not correspond to the
actual sense of rotation, change the connections of tracks A and B.
The Offset 1188 must be between 0° and 360°, divided by the number of motor pole
pairs. The possible range is between 0° and max. Offset.
pairs poleMotor
360
Offset Max.
°
=
If the adjusted value is changed by the max. Offset, this does not affect the Flux-
orming Voltage 235.
• Adjust a low reference speed value (approx. 10% lower than the Frequency
Switch-Off limit
417), and enable the frequency inverter via controller release
and S2IND (start clock-wise operation) in order to accelerate the motor.
• If an overcurrent is detected or a fault messa
e is issued due to an overload,
the
uided commissionin
(setup) will start first. Confirm the machined data
values. After completion of the guided commissioning, adjust the parameter
Current Limit 728 to a low value a
ain because this value was overwritten
during the guided commissioning.
Depending on the behavior of the motor after start, carry out the following steps:
− Motor does not turn, or the motor shaft only turns to a new position and
stops again:
• Check if parameter No. of Pole Pairs 373 has been set correctly for the motor.
If these values are ad
usted correctly, take the followin
measures complyin
with the
safety instructions.
Warning! When the frequency inverter is disconnected from power supply, the
mains, DC-link volta
e and motor terminals may still be live for some
time. Wait for some minutes until the DC link capacitors have dischar
ed
before starting to work at the unit.
• Before electrical installation work, de-ener
ize the frequency inverter and take
appropriate precautions to make sure it is not re-ener
ized unintentionally.
Make sure that the frequency inverter is discharged.
• Exchange two motor phases (e.g. U and V) at the frequency inverter terminals
because the senses of rotation of the motor and the encoder do not corres-
pond to each other.
• Switch on the power supply again.
• As described above, adjust a low speed reference value and start the motor.
If the motor does not start despite the phase exchange:
• Increase the parameter value for Offset 1188 by 90°, divided by the no. o
motor pole pairs.
If the motor still does not turn, exchange the two motor phases (e.g. U and V) again.
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