Hitachi SJ-FB - Manual (Page 22)

22
Chapter 6 OPERATION
(Note 6) : If satisfactory performance can not be obtained, adjust the motor constants for the
particular symptoms observed according to following table:
Inverter
Status
Symptom Observed Adjustment Guidelines
Parameter(s)
to Adjust
At starting
Shock occurs at
starting Set “Motor constant J” higher gradually, up to
1.2 times the initially preset (default) value.
H024/H034
Set the speed response lower. H005 At
deceleratio
n
Instability of motor
rotation
Set “Motor constant J” smaller than the
initially preset value.
H024/H034
During
torque limit
Insufficient torque
during torque limit
at low speed
Set overload restriction level lower than the
torque limit level(s). b022
b041-b044
At low
frequency
operation
Irregular rotation
Set “Motor constant J” higher than the initial
preset (default) value.
H024/H034