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5.3 C: Tuning
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
225
5
Figure 5.40
Figure 5.40 ASR Proportional Gain Switch
ASR Gain Tuning (C5-01, C5-03)
The higher this setting, the faster is the speed response. Too high of a setting can lead to oscillation. In general, this
setting should be increased with larger loads in order to minimize the speed deviation.
ASR Integral Time Tuning (C5-02, C5-04)
Determines how fast a continuous speed deviation problem is eliminated. Too long of an integral time makes the speed
control less responsive, while a too short of an integral time can cause oscillation.
■
C5-05: ASR Limit
Sets the ASR output limit as a percentage of the maximum output frequency (E1-04). If the motor rated slip is high, the
setting might need to be increased to provide proper motor speed control. Use the ASR output monitor U6-04 to
determine if ASR is working at the limit set in C5-05. If so, make sure the PG 1 pulses per revolution (F1-01), PG 1 gear
teeth 1 and 2 (F1-12, F1-13), and the PG signal are set correctly before making further changes to C5-05.
■
C5-06: ASR Primary Delay Time Constant
This parameter rarely requires adjustment. This parameter sets the filter time constant for the time from the speed loop to
the torque command output.
Increase this setting gradually in increments of 0.01 for loads with low rigidity, or when oscillation is a problem.
■
C5-07: ASR Gain Switching Frequency
Sets the frequency where the drive should switch between ASR proportional gain 1 and 2 (C5-01, C5-03) as well as
between integral time 1 and 2 (C5-02, C5-04).
Note:
A multi-function input set for the ASR gain switch (H1-
= 77) takes priority over the ASR gain switching frequency.
Switching the proportional gain and integral time in the low or high speed range can help stabilize operation and avoid
resonance problems. A good switching point is about 80% of the frequency where oscillation occurs, or at 80% of the
target speed. Refer to
C5-01, C5-03/C5-02, C5-04: ASR Proportional Gain 1, 2 / ASR Integral Time 1, 2 on page 224
■
C5-08: ASR Integral Limit
Sets the upper limit for ASR as a percentage of the rated load.
■
C5-12: Integral Operation during Accel/Decel (V/f w/PG)
Enables integral operation during acceleration and deceleration. Integral operation should be used when driving a heavy
load or a high inertia load, but can cause problems with overshoot at the end of acceleration and deceleration. Refer to
ASR Setup Problems and Corrective Actions on page 223
No.
Parameter Name
Setting Range
Default
C5-05
ASR Limit
0.0 to 20.0%
5.0%
No.
Parameter Name
Setting Range
Default
C5-06
ASR Primary Delay Time Constant
0.000 to 0.500 s
Determined by A1-02
No.
Parameter Name
Setting Range
Default
C5-07
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed as a percent (0.0 to 100.0%) instead of in Hz.
ASR Gain Switching Frequency
0.0 to 400.0 Hz
Determined by A1-02
No.
Parameter Name
Setting Range
Default
C5-08
ASR Integral Limit
0 to 400%
400%
C5-02
C5-02
OFF
ON
ASR Gain Switch signal
(Digital input)
C5-03 gain setting
Proportional gain (P)
Proportional gain
determined
by motor speed.
SIEP_C710636_02B_1_0.book 225 ページ 2015年11月25日 水曜日 午後4時56分