Omron Q2V Series Technical Manual page 440

12.1 A: INITIALIZATION
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Adjustments Relating to Control
When there is oscillation, rollback, or other control problems, adjust the parameters as specified by the control
method.
V/f Control on page 440
Note:
Torque and speed response for high-resistance and high-slip motors are slow. Adjust the torque and speed response to increase them.
Low impedance (low-slip) motors will hunt and oscillate. Adjust the torque and speed response to increase them.
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V/f Control
When you use V/f Control, do not use C3-01 [Slip Comp Gain].
Adjustment Description
Prevent hunting and oscillation at
middle-range speeds (10 Hz to 40 n1-02 [HuntPrev Gain Setting]
Hz)
• Increasing motor excitation
sound
C6-02 [Carrier Frequency
• Hunting and oscillation
Selection]
suppression at low speeds and
middle-range speeds
• Increase torque at low speeds
(10 Hz or lower)
C4-01 [Trq Comp Gain]
• Prevent hunting and
oscillation
E1-08 [Mid A Voltage]
• Increase torque at low speeds
• Prevent shock during start up
E1-10 [Min Output Voltage]
*1 The default setting changes when the settings for C6-01 [ND/HD Duty Selection] and o2-04 [Drive KVA Selection] change.
*2 The default setting changes when the settings for A1-02 [Control Method] 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.
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Open Loop Vector Control Method
Do not adjust parameter C4-01 [Trq Comp Gain]. Keep this parameter at its default setting.
If you cannot get speed accuracy during regeneration, set C3-04 = 1 [Slip Comp@Regen = Enable>6 Hz]. If you
cannot get speed accuracy at high speeds, set C3-05 = 1 [Vout Limit Selection = Enabled].
Table 12.5 Adjustment of Drive Control (Open Loop Vector Control Method)
Adjustment description
• Torque, increase speed
response
n2-01 [AFR Gain]
• Prevent hunting and
oscillation at middle-range
speeds (10 Hz to 40 Hz)
• Torque, increase speed
response
C4-02 [Trq Comp Delay Time]
• Prevent hunting and
oscillation
• Increase speed response
C3-02 [Slip Comp Delay Time]
• Increase speed stability
• Improve speed accuracy
C3-01 [Slip Comp Gain]
• Increasing motor excitation
sound
C6-02 [Carrier Frequency
• Prevent hunting and
Selection]
oscillation at low-range speeds
(10 Hz to or lower)
E1-08 [Mid A Voltage]
• Increase torque and speed
response at low speeds
• Prevent shock during start up
E1-10 [Min Output Voltage]
*1 If the value for C4-02 [Trq Comp Delay Time] is high, the current can increase during start up. Adjust and check the current during
start up.
440
shows only the frequently adjusted parameters.
Table 12.4 Adjustment of Drive Control (V/f Control)
Parameter Number
• If the torque is not sufficient with heavy loads, decrease the
setting.
• If there is hunting or oscillation with light loads, increase the
setting. Set n1-01 = 1 [HuntPrev Selection = Enabled].
• 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.
• 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.
• 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.
Parameter Number
• If torque and speed response are slow, decrease the setting value.
• If there is hunting or oscillation, increase the setting value.
• If torque and speed response are slow, decrease the setting value.
*1
• If there is hunting or oscillation, increase the setting value.
• When speed response is slow, decrease the setting value.
• If speed is not stable, increase the setting value.
• If speed is too slow, increase the setting value.
• If speed is too fast, decrease the setting value.
• If there is a loud motor excitation sound, increase the setting value.
• If there is hunting or oscillation at low speeds, decrease the setting
value.
• If the torque and speed response are slow, increase the setting
value.
• If there is a large shock during start up, decrease the setting value.
Possible Solutions
Possible Solutions
SIEPCYEUOQ2V01A Q2V Technical Manual
Default Recommen
ded Setting
1.00 0.50 - 2.00
*1
1 - F
1.00 0.50 - 1.50
13.0 V to 16.0
*2 *3
15.0 V
*3
V
*2 *3
9.0 V 7.0 V to 10.0 V
*3
Default Recommen
ded Setting
1.00 0.50 - 2.00
20 ms to 100
20 ms
ms
100 ms to 500
200 ms
ms
1.0 0.5 - 1.5
*2
1 - F
12.0 V to 13.0
*3
11.0 V
*3
V
2.0 V to 3.0 V
*3
2.0 V
*3