Omron Q2A Series Technical Manual page 156

4.8 Fine Tuning during Test Runs (Adjust the Control Function)
Table 4.18 Parameters for Fine Tuning the Drive (Open Loop Vector Control Method)
Issue
• Torque or speed response are
slow.
• Hunting or oscillation at mid-
range speeds (10 Hz to 40 Hz)
ov [overvoltage] occurs when the
drive stops accelerating, starts to
decelerate, or when there are large
changes in the load.
• Torque or speed response are
slow.
• Hunting or oscillation
• Speed response is slow.
• Speed is not stable.
Speed precision is unsatisfactory.
• The volume of the motor
excitation sound is too high.
• Hunting or oscillation at low
speeds (10 Hz or lower)
• Torque at low speeds (10 Hz or
lower) is not sufficient. speed
response is slow.
• Speed response is slow.
• Large initial vibration at start up.
*1 Default value changes when A1-02 [Control Method] and o2-04 [Drive KVA Selection] values change.
*2 Default value changes when A1-02 [Control Method] and E1-03 [V/f Pattern Selection] values change.
*3 Default value changes when Drive KVA Selection and ND/HD Duty Selection values change.
*4 Recommended settings are for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
156
Parameter Number
• To increase the speed of torque or speed response,
decrease the setting value in increments of 0.05.
n2-01 [AFR Gain]
• If hunting or oscillation occur, decrease the setting
value in increments of 0.05.
• To increase the speed of torque or speed response,
decrease the setting value in increments of 10 ms
and examine the response.
• If hunting or oscillation occur or if the load inertia is
too much, increase the setting value in increments of
50 ms and examine the response.
n2-02 [AFR Time 1]
Note:
Make sure that this parameter setting is: n2-02 ≤
n2-03 [AFR Time 2] holds true.
When you adjust n2-02, you must also increase
theC4-02 [Trq Comp Delay Time] value by the
same ratio.
• If ov occurs, increase the setting value in increments
of 50 ms and examine the response.
• If the response is not sufficient, decrease the setting
value in increments of 10 ms and examine the
response.
n2-03 [AFR Time 2]
Note:
Make sure that this parameter setting is: n2-02
[AFR Time 1] ≤ n2-03. When you adjust n2-03 you
must also increase the C4-06 [M2 Trq Comp Delay
Time] value by the same ratio.
• If ov occurs, increase the setting value in increments
of 10 ms and examine the response.
• If the response is not sufficient, decrease the setting
value in increments of 2 ms and examine the
response.
C4-06 [M2 Trq Comp Delay
Time] Note:
Make sure that this parameter setting is: C4-02 [Trq
Comp Delay Time] ≤ C4-06.
When you adjust C4-06, you must also increase the
n2-03 [AFR Time 2] value by the same ratio.
• If torque or speed response are slow, decrease the
setting value in increments of 2 ms.
• If hunting or oscillation occur, increase the setting
value in increments of 10 ms.
C4-02 [Trq Comp Delay
Note:
Time]
Make sure that this parameter setting is: C4-02 ≤
C4-06 M2 Trq Comp Delay Time.
When you adjust C4-02, you must also increase the
n2-02 AFR Time 1 value by the same ratio.
• If speed response is slow, decrease the setting value
in increments of 10 ms.
C3-02 [Slip Comp Delay
Time]
• If speed is not stable, increase the value in
increments of 10 ms.
• If speed is too slow, increase the setting value in
increments of 0.1.
C3-01 [Slip Comp Gain]
• If speed is too fast, decrease the setting value in
increments of 0.1.
• If the volume of the motor excitation sound is too
high, increase the carrier frequency.
C6-02 [Carrier Frequency
Selection]
• If hunting or oscillation occur at low speeds,
decrease the carrier frequency.
• If torque or speed response are slow, increase the
setting value.
• E1-08 [Mid A Voltage] • If there is large initial vibration at start up, decrease
the setting value
• E1-10 [Min Output
Voltage] Note:
If the setting value is set too high, a large torque
reference may be output even with light loads.
Solution
1.00
50 ms
750 ms
150 ms
20 ms
200 ms
1.0
1 (2 kHz)
• E1-08: 11.0
• E1-10: 2.0
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Default Recommended Setting
Setting
0.50 - 2.00
50 - 2000 ms
750 - 2000 ms
150 - 750 ms
*1 *1
20 - 100 ms
*1
100 - 500 ms
*2
0.5 - 1.5
*3
0 to upper limit value
*2
Default setting +/- 2 V
*2
*4