Omron SYSDRIVE 3G3FV - Hunting-Prevention Function

6-14
Timing Chart
Run command
Energy-saving command
Output frequency
Output voltage
Frequency reference ≥ b8-02
E1-03 to E1-10 setting × Energy Save Gain (B8-01)
L2-04
OFF
OFF
ON
ON
6-2-3 Hunting-prevention Function
The hunting-prevention function suppresses hunting when the motor is operating with a light load. This
function is valid with V/f control and V/f with PG control. Parameters C7-01 and C7-02 cannot be
changed during operation.
Parameter Display name Setting Units Default
Valid access levels
number
py
g
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
C7-01 Hung Prev Select 0, 1 --- 1 Advanced Not applicable.
C7-01 Settings
Setting Function
0 Disables the hunting-prevention function.
1 Enables the hunting-prevention function.
Parameter Display name Setting Units Default
Valid access levels
number
py
g
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
C7-02 Hung Prev Gain 0.00 to 2.50 Factor 1.00 Advanced Not applicable.
Normally it isn’t necessary to change these parameters. Adjust these parameters as follows if hunting
occurs with a light load.
• Increase the setting in C7-02 if vibration occurs when operating with a light load.
(If the setting is increased too much, the current can fall to the point where stalling occurs.)
• Decrease the setting in C7-02 if stalling occurs.
• Disable the hunting-prevention function (C7-01 = 0) if high responsiveness is more important than
suppressing vibration.
Advanced Operation Chapter 6