Parameter Details
12
12.4 C: Tuning
YASKAWA SIEPC71061705H GA700 Series Technical Manual 707
• Terminal FM: Outputs the output frequency after SFS in a -10 V to +10 V (-100% to +100%) range.
• Terminal AM: Outputs the motor speed in a -10 V to +10 V (-200% to +200%) range.
Yaskawa recommends that you monitor the output frequency after SFS and the motor speed for delays in response
and differences in reference values.
■ Adjust ASR Parameters
Use Table 12.37 to adjust ASR. The table lists parameters for motor 1. You can make the same changes to motor 2
parameters when you run a second motor.
Note:
When adjusting the proportional gain and integral time, adjust the proportional gain first.
Table 12.37 ASR Response and Possible Solutions
Problem Possible Solutions
Speed response is slow.
• Increase C5-01/C5-03 [ASR Proportional Gain].
• Decrease C5-02/C5-04 [ASR Integral Time].
Overshoot or undershoot occurs at the end of acceleration
or deceleration.
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
Vibration and oscillation occur at constant speed.
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
• Increase C5-06 [ASR Delay Time].
Speed accuracy is unsatisfactory when you operate a
motor that has a large quantity of rated slip in Closed
Loop V/f Control.
• Examine the pulse number set to F1-01 [Encoder 1
Pulse Count (PPR)] and the gear ratio to F1-12
[Encoder 1 Gear Teeth 1] and F1-13 [Encoder 1 Gear
Teeth 2].
• Make sure that you correctly set the pulse signal from
the encoder.
• Examine U6-04 [ASR Output] to make sure that the
ASR operates at its output limit set to C5-05 [ASR
Limit]. If the ASR is at the output limit, increase C5-
05.
When C5-12 = 1 or C5-32 = 1 [Enabled] in Closed Loop
V/f Control, over/undershoot occurs if you change
speeds.
-
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
• Decrease the value set to C5-05.
Oscillation at low speed and response is too slow at high
speed.
Oscillation at high speed and response is too slow at low
speed.
-
• Closed Loop V/f Control Mode:
Use C5-03 and C5-04 at maximum speed and C5-01
and C5-02 at minimum speed to set different ASR
settings.
• Closed Loop Vector Control, PM Advanced Open
Loop Vector Control, and PM Closed Loop Vector
Control:
Use C5-01 to C5-04 to set the best ASR settings for
high and low speed. Use C5-07 [ASR Gain Switchover
Frequency] to switch the ASR proportional gain and
ASR integral time as specified by the output
frequency.
■ C5-01: ASR Proportional Gain 1
No.
(Hex.)
Name Description
Default
(Range)
C5-01
(021B)
RUN
ASR Proportional Gain 1
Sets the gain to adjust ASR response.
Determined by A1-02
(0.00 - 300.00)
A higher gain provides a higher speed response. Usually, the gain increases with larger loads. Too much gain will
cause vibration.
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