YASKAWA GA700 Series Technical Manual page 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.
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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.
Speed response is slow.
Overshoot or undershoot occurs at the end of acceleration
or deceleration.
Vibration and oscillation occur at constant speed.
Speed accuracy is unsatisfactory when you operate a
motor that has a large quantity of rated slip in Closed
Loop V/f Control.
When C5-12 = 1 or C5-32 = 1 [Enabled] in Closed Loop
V/f Control, over/undershoot occurs if you change
speeds.
Oscillation at low speed and response is too slow at high
speed.
Oscillation at high speed and response is too slow at low
speed.
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C5-01: ASR Proportional Gain 1
No.
Name
(Hex.)
C5-01 ASR Proportional Gain 1
(021B)
RUN
A higher gain provides a higher speed response. Usually, the gain increases with larger loads. Too much gain will
cause vibration.
YASKAWA SIEPC71061705H GA700 Series Technical Manual
Table 12.37 ASR Response and Possible Solutions
Problem
-
-
V/f CL-V/f OLV CLV AOLV
Sets the gain to adjust ASR response.
• Increase C5-01/C5-03 [ASR Proportional Gain].
• Decrease C5-02/C5-04 [ASR Integral Time].
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
• Increase C5-06 [ASR Delay Time].
• 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.
• Decrease C5-01/C5-03.
• Increase C5-02/C5-04.
• Decrease the value set to C5-05.
• 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.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
12.4 C: Tuning
Possible Solutions
Default
(Range)
Determined by A1-02
(0.00 - 300.00)
707
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