Parameter Details
11
11.4 C: Tuning
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 769
■ C5-25: Motor 2 ASR Limit
No.
(Hex.)
Name Description
Default
(Range)
C5-25
(035A)
Motor 2 ASR Limit
Sets the ASR output limit for motor 2 as a percentage of E1-04 [Maximum
Output Frequency].
5.0%
(0.0 - 20.0%)
If the motor rated slip is high, it could be necessary to increase the setting to provide correct motor speed control.
Use U6-04 [ASR Output] to make sure that ASR is operating at the limit set in this parameter. When ASR is
operating at the limit, correctly set the PG signal and these parameters before you make changes to C5-25:
• F1-31 [Encoder 2 Pulse Count (PPR)]
• F1-33 [Encoder 2 Gear Teeth 1]
• F1-34 [Encoder 2 Gear Teeth 2]
■ C5-26: Motor 2 ASR Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C5-26
(035B)
Motor 2 ASR Delay
Time
Sets the filter time constant for the time from the speed loop to the torque
command output for motor 2. Usually it is not necessary to change this
setting.
Determined by E3-01
(0.000 - 0.500 s)
If you have a load with low rigidity or if oscillation is a problem, increase this setting in 0.01 unit increments.
■ C5-27: Motor 2 ASR Gain Switchover Freq
No.
(Hex.)
Name Description
Default
(Range)
C5-27
(035C)
Motor 2 ASR Gain
Switchover Freq
Sets the frequency where the drive will switch between these parameters:
C5-21 and C5-23 [Motor 2 ASR Proportional Gain 1/2]
C5-22 and C5-24 [Motor 2 ASR Integral Time 1/2]
0.0
(0.0 - 400.0)
Switching the proportional gain and integral time in the low or high speed range can help operation become
stable. A good switching point is 80% of the frequency where oscillation occurs or at 80% of the maximum output
frequency.
Note:
An MFDI set for H1-xx = 77 [MFDI Function Select = ASR Gain (C5-03) Select] will have priority over the ASR gain switching
frequency.
■ C5-28: Motor 2 ASR Integral Limit
No.
(Hex.)
Name Description
Default
(Range)
C5-28
(035D)
Motor 2 ASR Integral
Limit
Sets the upper limit for ASR for motor 2 as a percentage of the rated load.
400%
(0 - 400%)
■ C5-29: Speed Control Response
No.
(Hex.)
Name Description
Default
(Range)
C5-29
(0B18)
Expert
Speed Control
Response
Sets the level of speed control responsiveness. Usually it is not necessary to
change this setting.
0
(0, 1)
If a high level of speed control responsiveness is necessary, set C5-29 = 1,then adjust the speed control (ASR)
parameter.
0 : Standard
1 : High Performance 1
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