EM-RES-03 10/0764
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 the parameters No. of Pole Pairs 373 for the motor and No. of Pole
Pairs
381 for the resolver are set correctly.
If these values are adjusted correctly, take the following measures complying with
the safety instructions.
Warning! The mains, direct voltage and motor sockets can be live with dangerous
voltage after disconnection of the frequency inverter. Work only on the
device after a waiting period of some minutes until the DC link capacitors
have discharged.
• Before electrical installation work, de-energize the frequency inverter and take
appropriate precautions to make sure it is not re-energized unintentionally.
Make sure that the frequency inverter is de-energized.
• Exchan
e two motor phases (e.
. U and V) at the frequency inverter sockets
because the senses of rotation of the motor and the resolver do not corre-
spond 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 382 by 90°, divided by the no. of mo-
tor pole pairs.
If the motor still does not turn, exchange the two motor phases (e.g. U and V)
again.
− The motor turns and accelerates until it reaches the Frequency Switch-Of
Limit 417:
• Check the resolver lines and check the resolver connection contacts.
• In the case of fault messa
e "Overfrequency" F1100: increase the paramete
value for Offset 382 by 180°, divided by the no. of motor pole pairs.
− If the motor turns at the adjusted speed and in the right direction, carry
out the fine adjustment of the offset:
• Adjust the parameter value for Offset 382 in small steps (e.
. 2.5°) until the
flux-forming voltage 235 is approximately 0.
− In case the flux-forming voltage deviates from 0 si
nificantly, ad
ust the offse
in bigger steps.
− In the case of a positive flux-forming voltage, increase the offset.
− In the case of a negative flux-forming voltage, reduce the offset.
• Adjust parameters Frequency Switch-Off Limit 417 and Current Limit 728 to
the required values.
• Repeat the fine adjustment of the offset at 50% of the rated frequency.
This completes the offset adjustment.
• Start the guided commissioning. This is required for optimum current control.
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