Startup Procedure and Test Run
6
6.10 Fine Tuning during Test Runs (Adjust the Control Function)
YASKAWA TOEPYAIGA8001B GA800 Drive Maintenance & Troubleshooting 505
Issue Parameter Number Possible Solutions Default Recommended Setting
Stalling or oscillation occurs when
you apply the load during constant
speed
n8-47 [Pull-in Current Comp Filter
Time]
Decrease the setting value in
increments of 0.2 s.
5.0 s -
n8-48 [Pull-in/Light Load Id
Current]
Increase the setting value in
increments of 5%.
30% -
n8-55 [Motor to Load Inertia
Ratio]
Increase the setting value.
Note:
When you operate a single
motor or with a minimum
quantity of inertia, if you set
this value too high, it can cause
motor oscillation.
0 Near the load inertia ratio.
Hunting or oscillation
n8-45 [Speed Feedback Detection
Gain]
Increase the setting value in
increments of 0.05.
0.80 -
The drive detects STPo [Motor
Step-Out Detected] fault when the
load is not too high.
• E5-09 [PM Back-EMF Vpeak
(mV/(rad/s))]
• E5-24 [PM Back-EMF L-L
Vrms (mV/rpm)]
• Adjust the setting value.
• Examine the motor code on the
motor nameplate or the data
sheet, then set correct values for
E5-09 or E5-24.
*1
• Yaskawa motor
Set the motor code from the
motor nameplate.
• Motor from another
manufacturer
Set the values from the test
report.
The drive detected stalling or STPo
[Motor Step-Out Detected] at high
speed and maximum output
voltage.
n8-62 [Output Voltage Limit
Level]
Set to a value lower than the actual
input voltage.
• 200.0 V
• 400.0 V
-
*1 The default setting changes when the settings for E5-01 [Motor Code Selection] and o2-04 [Drive Model (KVA) Selection] change.
◆ Advanced Open Loop Vector Control Method for PM Motors
Table 6.22 Parameters for Fine Tuning the Drive (A1-02 = 6 [AOLV/PM])
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]
• 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.
10.00 5.00 to 30.00
*1
• High speed
C5-02 [ASR Integral Time 1]
• Low speed
C5-04 [ASR Integral Time 2]
• 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
*1
The drive cannot find ASR
proportional gain or integral time
for low speed or high speed.
C5-07 [ASR Gain Switchover
Frequency]
Change the ASR proportional gain
and ASR integral time to conform
to the output frequency.
0.0% 0.0% to maximum rotation speed
Hunting or oscillation C5-06 [ASR Delay Time]
If the rigidity of the machine is
unsatisfactory and vibration is
possible, increase the setting value
in increments of 0.010.
0.016 s 0.016 s to 0.035 s
*1
Step-out
E1-xx parameters, E5-xx
parameters
Refer to the motor nameplate or
test report and set E1-xx or E5-xx
correctly.
- -
*1 The best values for a no-load operation are different than the best values for actual loading operation.
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