YASKAWA GA800

Startup Procedure and Test Run
4
4.10 Fine Tuning during Test Runs (Adjust the Control Function)
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 229
Issue Parameter Number Possible Solutions Default Recommended Setting
Speed precision is unsatisfactory. C3-01 [Slip Compensation Gain]
• If speed is too slow, increase the
setting value in increments of
0.1.
• If speed is too fast, decrease the
setting value in increments of
0.1.
1.0
*2
0.5 - 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.
1 (2 kHz)
*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 the setting value is set too
high, a large torque reference
may be output even with light
loads.
• E1-08: 11.0 V
*2
• E1-10: 2.0 V
*2
Default setting +/- 2 V
*4
*1 The default setting changes when the settings forA1-02 [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 the drive detects oC [Overcurrent] or ov [Overvoltage] during speed search after the drive
restores power after a momentary power loss, 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
◆ Closed Loop Vector Control Method
Table 4.19 Parameters for Fine Tuning the Drive (CLV)
Issue Parameter Number Possible Solutions Default Recommended Setting
• Unsatisfactory motor torque
and speed response
• Hunting or oscillation
• High speed
C5-01 [ASR Proportional Gain
1]
• Low speed
C5-03 [ASR Proportional Gain
2 (P)]
*1
• If torque or speed response are
slow, increase the setting value
in increments of 5.00.
• If hunting or oscillation occur,
decrease the setting value.
20.00 10.00 - 50.00
• High speed
C5-02 [ASR Integral Time 1]
• Low speed
C5-04 [ASR Integral Time 2
(I)]
*1
• If torque or speed response are
slow, decrease the setting value.
• If hunting or oscillation occur,
increase the setting value.
0.500 s 0.300 s to 1.000 s
The drive cannot find ASR
proportional gain or integral time
for low speed or high speed.
C5-07 [ASR Gain Switchover
Frequency]
*1
Change the ASR proportional gain
and ASR integral time to conform
to the output frequency.
0.0 Hz
0.0 Hz to maximum output
frequency
Hunting or oscillation C5-06 [ASR Delay Time]
*1
• If torque or speed response are
slow, decrease the setting value
in increments of 0.010.
• If the rigidity of the machine is
unsatisfactory and vibration is
possible, increase the setting
value.
0.004 s 0.004 s to 0.020 s
• The volume of the motor
excitation sound is too high.
• Hunting or oscillation at low
speeds (3 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.
1 (2.0 kHz)
*2
2.0 kHz to upper limit value
*1 Refer to the section on C5-xx parameters for more information about speed control (ASR).