Hitachi SJ-FB manual Operation

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	Symptom Observed				Adjustment Guidelines	Parameter(s)
Status						to Adjust
At starting	Shock	occurs		at	Set “Motor constant J” higher gradually, up to	H024/H034
	starting				1.2 times the initially preset (default) value.
At	Instability of		motor		Set the speed response lower.	H005
deceleratio	rotation				Set “Motor constant J” smaller than the	H024/H034
n					initially preset value.
During	Insufficient		torque		Set overload restriction level lower than the	b022
torque limit	during	torque		limit	torque limit level(s).	b041-b044
	at low speed
At low	Irregular rotation				Set “Motor constant J” higher than the initial	H024/H034
frequency
operation					preset (default) value.

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