5-43
D Adjusting ASR Integral Time 1 (C5-02)
This
parameter sets the speed control loop’
s
integral time. Lengthening the integral time lowers the re
-
sponsiveness,
and weakens the resistance to external influences. V
ibration will occur if this setting is
too short.
The following diagram shows changes that occur in the response when the ASR integral time is
changed.
Motor speed
Short integral time
Time
Long integral time
H Different Gain Settings for Low-speed/High-speed
Switch
between low-speed and high-speed gain when vibration occurs because of resonance with
the
mechanical system at low speed or high speed.
D Setting the Gain Switching Frequency (C5-07)
Set
the switching frequency to about 80% of the motor
’
s operating frequency
or the frequency at which
vibration occurs.
D Low-speed Gain Adjustments (C5-03 and C5-04)
• Connect the actual load and adjust these parameters at zero-speed.
• Increase ASR proportional gain 2 (C5-03) until there is no vibration.
• Decrease ASR integral time 2 (C5-04) until there is no vibration.
D High-speed Gain Adjustments (C5-01 and C5-02)
• Adjust these parameters at normal operating speed.
• Increase ASR proportional gain 1 (C5-01) until there is no vibration.
• Decrease ASR integral time 1 (C5-02) until there is no vibration.
• Refer
to
Fine
Adjustments
on page
5-41 for details on making fine adjustments of high-speed opera
-
tion.
Basic Operation Chapter
5
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