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 - 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
13.0 V to 16.0 V
E1-10 [Minimum Output
Voltage]
9.0 V
7.0 V to 10.0 V
*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]
•
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