11.2 A: Initialization Parameters
690 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Table 11.19 Adjustment of Drive Control (V/f Control and Closed Loop V/f Control Methods)
Adjustment
description
Parameter Number Solution Default Setting Suggested Setting
• Prevent hunting and
oscillation at middle-
range speeds (10 Hz to
40 Hz)
n1-02 [Hunting
Prevention Gain Setting]
• If the torque is not
sufficient with heavy
loads, decrease the
setting.
• If there is hunting or
oscillation with light
loads, increase the
setting.
1.00 0.50 - 2.00
• Increasing motor
excitation sound
• Hunting and oscillation
suppression at low
speeds and middle-
range speeds
C6-02 [Carrier Frequency
Selection]
• If there is a loud motor
excitation sound,
increase the setting
value.
• If there is hunting or
oscillation at low
speeds or middle-range
speeds, decrease the
setting value.
*1
1 - F
• Increase torque at low
speeds (10 Hz or lower)
• Prevent hunting and
oscillation
C4-01 [Torque
Compensation Gain]
• If the torque is not
sufficient at low speeds,
increase the setting
value.
• If there is hunting or
oscillation with light
loads, decrease the
setting value.
1.00 0.50 - 1.50
• Increase torque at low
speeds
• Prevent shock during
start up
E1-08 [Mid Point A
Voltage]
• If the torque is not
sufficient at low speeds,
increase the setting
value.
• If there is a large shock
during start up,
decrease the setting
value.
15.0 V
*2 *3
13.0 V to 16.0 V
*3
E1-10 [Minimum Output
Voltage]
9.0 V
*2 *3
7.0 V to 10.0 V
*3
*1 The default setting changes when the settings for C6-01 [Normal / Heavy Duty Selection] and o2-04 [Drive Model (KVA) Selection]
change.
*2 The default setting changes when the settings for A1-02 [Control Method Selection] and E1-03 [V/f Pattern Selection] change.
*3 This is the setting for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
Open Loop Vector Control Method
Do not adjust parameter C4-01 [Torque Compensation Gain]. Keep this parameter at its default setting.
If you cannot get speed accuracy during regeneration, set C3-04 = 1 [Slip Compensation at Regen = Enabled
Above 6Hz]. If you cannot get speed accuracy at high speeds, set C3-05 = 1 [Output Voltage Limit Selection =
Enabled].
Table 11.20 Adjustment of Drive Control (Open Loop Vector Control Method)
Adjustment
description
Parameter Number Solution Default Setting Suggested Setting
• Torque, increase speed
response
• Prevent hunting and
oscillation at middle-
range speeds (10 Hz to
40 Hz)
n2-01 [Automatic Freq
Regulator Gain]
• If torque and speed
response are slow,
decrease the setting
value.
• If there is hunting or
oscillation, increase the
setting value.
1.00 0.50 - 2.00
• Torque, increase speed
response
• Prevent hunting and
oscillation
C4-02 [Torque
Compensation Delay
Time]
*1
• If torque and speed
response are slow,
decrease the setting
value.
• If there is hunting or
oscillation, increase the
setting value.
20 ms 20 - 100 ms
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