Fuji Electric FRENIC-Lift LM2 Series - UNDERSHOOT FROM HIGH SPEED TO CREEP SPEED; HIT AT STOPPING

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TROUBLESHOOTING (Stopping)
HIT AT
STOPPING
CAUSE
ACTION
Early brake closing
Increase L83
Max. L83=F22 - Brake reaction time
DC brake reaction too
strong
Reduce F21
Min. F21=50%
Deceleration ramp too
fast
Increase deceleration ramp (i.e. E15)
The maximum value depends on the lift magnets
Not related to inverters
setting
Check security chain
Check brake operation
ROLLBACK
CAUSE
ACTION
Late brake closing
Reduce L83
DC brake reaction too
soft
Increase F21
Max. F21=90%
Check F22≠0.00s
Insufficient torque
Increase P06
P06= 30~70% of P03
Increase F09
Max. F09=5.0 %
Not related to inverters
setting
Check security chain operation (EN signal)
Check brake operation
LANDING
ACCURACY
(STOPPING
DEPENDING
ON THE
LOAD)
CAUSE
ACTION
Incorrect slip frequency
Perform Auto tuning (P04=2)
Calculate slip frequency manually
)(_
_))(_)(_(
12
rpmspeedsSynchronou
FrequencyNomrpmspeedRatedrpmspeedsSynchronou
P


Insufficient torque
Increase P06
P06=30~70% of P03
Different landing
accuracy (braking,
driving)
Stopping too early (driving mode): Increase P09
Stopping too late (driving mode): Decrease P09