YASKAWA CR700 Technical Manual

Startup Procedure and Test Run
3
3.12 Controllability Problems and Possible Solutions
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 241
Problem Parameter Number Solution Default Recommended Value
Improve speed accuracy E2-02 [Motor Rated Slip]
• Decouple the motor and
machinery and perform
Rotational Auto-Tuning.
• If the actual motor speed is
slow, increase the value of E2-
02 in tiny increments (by
approximately 0.1% of the
default setting value).
• If the actual motor speed is
fast, decrease the value of E2-
02 in tiny increments (by
approximately 0.1% of the
default setting value).
*2
Adjust the value of E2-02 that was
automatically set as the result of
Rotational Auto-Tuning within a
range of ±5% of the current value.
• Torque, speed response is
slow.
• Hunting, oscillation
• High speed
C5-01 [ASR Proportional Gain
1]
• Low speed
C5-03 [ASR Proportional Gain
2]
*3
• Increase setting value in
increments of 5.00 when
torque, speed response is slow.
• If hunting, oscillation occurs,
decrease the setting value.
20.00 10.00 to 50.00
• High speed
C5-02 [ASR Integral Time 1]
• Low speed
C5-04 [ASR Integral Time 2]
*3
• Decrease setting value when
torque, speed response is slow.
• If hunting, oscillation occurs,
increase the setting value.
0.500 s 0.300 s to 1.000 s
Speed response cannot be secured
for low speed or high speed.
• C5-07 [ASR Gain Switchover
Frequency]
*4
• High speed
C5-01 [ASR Proportional Gain
1]
C5-02 [ASR Integral Time 1]
• Low speed
C5-03 [ASR Proportional Gain
2]
*3
C5-04 [ASR Integral Time 2]
Change the ASR proportional
gain and ASR integral time in
accordance with the output
frequency.
0.0 Hz
0.0 Hz to maximum output
frequency
Hunting, oscillation C5-06 [ASR Delay Time]
*4
• Decrease setting value in
increments of 0.010 when
torque, speed response is slow.
• Increase setting value when
vibration is likely to occur due
to poor machine rigidity.
0.004 s 0.004 s to 0.020 s
*1 Differs depending on setting for o2-04 [Drive Model (KVA) Selection], when at default settings.
*2 Differs depending on setting for o2-04 [Drive Model (KVA) Selection], when at default settings.
*3 For more information about speed control (ASR), refer to the section where the C5 parameter is explained.
*4 The optimal values for a no-load operation can differ from the optimal values for actual loading operation.

YASKAWA CR700 Specifications

General

Brand	YASKAWA
Model	CR700
Category	DC Drives
Language	English