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IMPULSE®•G+ & VG+ Series 4 Instruction Manual – February 2017
5-67
Hunting Prevention
Occasionally, in an application, resonance between the internal control system and the mechanical
system causes instability. This is called hunting, and may cause a crane to vibrate at a lower speed
(up to 30 Hz) and/or with a light load. The hunting prevention function monitors the motor flux and
uses a special control circuit to “smooth out” any peaks in the output current wave form.
Increase the set value of D11-02 when hunting is present while driving a light load. Decrease the set
value of D11-02 when the motor vibrates or stalls while driving a heavy load.
Table 5-53: Hunting Prevention Parameter Settings
Parameter Display
Function
Range
Default
Control
Method
Model
D11-01
Hunt Prev Select
Enable/Disable Hunt
Prevention function
0, 1
1
V/f
G+
0
Disabled
1
Enabled
D11-02
Hunt Prev Gain
Hunting Prevention Gain
0.00–2.50
1.00
V/f
G+
D11-03
Hunt Prev Time
Hunting Prevention Time
Constant
0–500ms
10
V/f
G+
D11-05
Rev Hunt Prev Gn
Reverse Hunting Prevention
Gain
0.00–2.50
0.00
V/f
G+
Summary of Contents for Impulse G+ series 4
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Page 13: ...C h a p t e r 1 Introduction...
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Page 27: ...C h a p t e r 2 Installation...
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Page 41: ...C h a p t e r 3 Wiring...
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Page 67: ...C h a p t e r 4 Getting Started...
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Page 87: ...C h a p t e r 5 Programming Advanced Features...
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Page 223: ...C h a p t e r 6 Troubleshooting...
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Page 255: ...a p p e n d i x A IMPULSE G VG Series 4 Parameter Listing...
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