Omron Q2V Series, Техническое руководство

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4.11 Fine Tuning during Test Runs (Adjust the Control Function)
132 SIEPCYEUOQ2V01A Q2V Technical Manual
4.11 Fine Tuning during Test Runs (Adjust the Control
Function)
This section gives information about the adjustment procedures to stop hunting or oscillation errors caused by the
control function during a test run. Adjust the applicable parameters as specified by your control method and drive
status.
Note:
This section only lists frequently adjusted parameters. If you must adjust parameters that have a higher degree of precision, contact the
manufacturer.
◆
V/f Control
Table 4.17 Parameters for Fine Tuning the Drive ( A1-02 = 0 [V/f Control] )
Issue Parameter Number Possible Solutions Default Recommended
Setting
Hunting or oscillation at mid-range speeds
(10 Hz to 40 Hz)
n1-02 [HuntPrev Gain Setting]
• If torque is not sufficient with heavy
loads, decrease the setting value.
•
If hunting or oscillation occur with light
loads, increase the setting value.
• If hunting occurs with a low-inductance
motor, for example a motor with a
larger frame size or a high-frequency
motor, lower the setting value. Set
n1-
01 = 1 [HuntPrev Selection =
Enabled]
.
1.00 0.10 - 2.00
• The volume of the motor excitation
sound is too high.
• Hunting or oscillation at low speeds (10
Hz or lower), or at mid-range speeds
(10 Hz to 40 Hz)
C6-02 [Carrier Frequency Selection]
•
If the volume of the motor excitation
sound is too high, increase the carrier
frequency.
•
If hunting or oscillation occur at low or
mid-range speeds, decrease the carrier
frequency.
1 (2 kHz)
*1
1 to upper limit
value
•
Unsatisfactory motor torque and speed
response
• Hunting or oscillation
C4-02 [Trq Comp Delay Time]
• If torque or speed response are slow,
decrease the setting value.
•
If hunting or oscillation occur, increase
the setting value.
200 ms
*2
100 ms to 1000 ms
•
Torque at low speeds (10 Hz or lower)
is not sufficient.
• Hunting or oscillation
C4-01 [Trq Comp Gain]
• If torque at low speeds (10 Hz or lower)
is not sufficient, increase the setting
value.
• If hunting or oscillation occur with light
loads, decrease the setting value.
1.00 0.50 - 1.50
• If you use the drive with an IE3 high
efficiency motor, the current that is
more than the motor rated current will
flow and trip at overload. Hunting or
oscillation.
C4-01 [Trq Comp Gain]
Decrease the setting value in these
conditions:
•
Drive trips at overload.
•
Hunting or oscillation.
1.00 0.00 - 1.00
•
Torque at low speeds (10 Hz or lower)
is not sufficient.
• Large initial vibration at start up.
• E1-08 [Mid A Voltage]
•
E1-10 [Min Output Voltage]
• If torque at low speeds (10 Hz or lower)
is not sufficient, increase the setting
value.
• If there is large initial vibration at start
up, decrease the setting value
• E1-08: 16.0 V
*3
•
E1-10: 12.0 V
*3
Default s/- 5
V
*4
Speed precision is unsatisfactory. C3-01 [Slip Comp Gain]
Set E2-01 [Mot Rated Current (FLA)], E2-
02 [Mot Rated Slip], and E2-03 [Mot No-
Load Current]
, then adjust C3-01 .
0.0 (no slip
compensation)
0.5 - 1.5
*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 o2-04 change.
*3 The default setting changes when the settings for A1-02 and E1-03 [V/f Pattern Selection] change.
*4 Recommended settings are for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
◆
Open Loop Vector Control Method
In Open Loop Vector Control, keep C4-01 [Trq Comp Gain] at its default setting (1.00).
If you cannot get speed precision during regeneration in Open Loop Vector Control, set C3-04 = 1 [Slip
Comp@Regen = Enable>6 Hz] .