Startup Procedure and Test Run
3
3.7 Fine Tuning during Test Runs (Adjust the Control Function)
YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING 483
Issue Parameter Number Possible Solutions Default Recommended Setting
• Unsatisfactory motor torque
and speed response
• Hunting or oscillation
C4-02 [Torque Compensation
Delay Time]
• If torque or speed response are
slow, decrease the setting value
in 2 ms increments.
• If hunting or oscillation occur,
increase the setting value in 10
ms increments.
Note:
Make sure that this parameter
setting is: C4-02 ≤ C4-06
[Motor 2 Torque Comp Delay
Time].
When you adjust C4-02, you
must also increase the n2-02
[Automatic Freq Regulator
Time 1] value by the same
ratio.
20 ms
*1
20 ms - 100 ms
*1
• Speed response is slow.
• Speed is not stable.
C3-02 [Slip Compensation Delay
Time]
• If speed response is slow,
decrease the setting value in 10
ms increments.
• If speed is not stable, increase
the value in 10 ms increments.
200 ms
*1
100 ms to 500 ms
Speed precision is unsatisfactory. C3-01 [Slip Compensation Gain]
• If speed is too slow, increase the
setting value in 0.1 unit
increments.
• If speed is too fast, decrease the
setting value in 0.1 unit
increments.
1.0
*2
0.5 to 1.5
• The volume of the motor
excitation sound is too high.
• Hunting or oscillation at low
speeds (10 Hz or lower)
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 speeds, decrease the carrier
frequency.
7 (Swing PWM1)
*3
0 to upper limit value
• 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.
• E1-08 [Mid Point A Voltage]
• E1-10 [Minimum Output
Voltage]
• If torque or speed response are
slow, increase the setting value.
• If there is large initial vibration
at start up, decrease the setting
value
Note:
If you set the value too high,
the drive can output a large
torque reference although the
load is light.
• E1-08: 12.0 V
*2
• E1-10: 2.5 V
*2
Default setting +/- 2 V
*4
*1 The default setting changes when the settings for A1-02 [Control Method 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 The default setting changes when the settings for C6-01 [Normal / Heavy Duty Selection] and o2-04 change.
*4 Recommended settings are for 200 V class drives. Multiply the voltage by 2 for 400 V class drives.
■ Precaution When You Use IE3 Premium Efficiency Motors
IE3 motors have different motor characteristics from IE1 and other motors. Set the parameters as specified by the
motor characteristics. If you have a momentary power loss, and the drive detects oC [Overcurrent] or ov
[Overvoltage] during speed search after it restores power, set these parameters:
• b3-03 [Speed Search Deceleration Time] = default value × 2
• L2-03 [Minimum Baseblock Time] = default value × 2
• L2-04 [Powerloss V/f Recovery Ramp Time] = default value × 2
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