FREQUENCY JUMP SETTING
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Frequency jump
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to •I •I
A range of frequency, which causes resonance
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with vibration specific to the associated
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machine system, can be jumped over.
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A maximum of three frequency ranges can 0’
be specified for frequency jump.
Frequency reference signal
To specify jump frequency range, start frequency and end frequency range can be set.
When frequency reaches any one of the frequency, jump ranges, frequency is
clamped at point ” 1 A ” , ” 2 A ” or ” 3 A ” shown above.
Note: When ” 9999 ” (initial setting) is set, frequency jump control does not operate.
REGENERATIVE BRAKE DUTY (%ED) SETTING
Regenerative brake duty @J •!
Duty imposed on discharge resistor for regenerative braking can be set.
For exceptionally arduous duty, use of resistors having a larger capacity should
be considered.
Initial setting: (1) ZOOV class
Models smaller than 3.7K . . . 3 %
Models 5.5K and 7.5K . . . 2 %
Models larger than 11K . . . 0 %
(2) 400V
class
Models 2.2K to 7.5K . . . . 2 %
Note: For models larger than llK, setting is ignored.
STALL PREVENTION LEVEL SETTING
Stall prevention level [21
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When a small-capacity motor (as compared with capacity of inverter) is driven
by a large-capacity inverter, overload (excessively large torque) can be prevented
by changing current level at which the stall preventive function is activated.
-107-
.
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