IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 117
5.3.4.1
Adjusting the ASR Parameters in FLV
The VFD is preset to use ASR settings D04-01/D04-02 over the entire speed range in Flux Vector. If required by
the application, a second set of ASR parameters (D04-03/D04-04) can be automatically activated depending on
the motor speed or by using a digital input.
Perform the following steps for adjusting ASR parameters:
1. Run the motor at zero speed and increase the ASR gain (D04-01) as much as possible without oscillation.
2. Run the motor at zero speed and decrease the ASR integral time (D04-02) as much as possible without
oscillation.
3. Run at the normal operating speed. Check for over/undershoot when changing speed and for any oscillation.
4. If problems occur in step 3, increase the integral time and reduce the gain.
Alternatively, use different ASR settings for high and low speed. Set the values from step 1 and 2 to parameters
D04-03 and D04-04, then set an ASR switching frequency in parameter D04-07. Run the motor at a speed higher
than D04-07 and repeat step 3 while adjusting D04-01 and D04-02.
5.3.4.2
Solving Problems During ASR Setup
Use
when making adjustments to ASR.
Table 5-47: ASR Setup Problems and Corrective Actions
Problem
Possible Solutions
Slow response to speed changes or speed
deviation lasts for too long
•
Increase the ASR gain.
•
Decrease the integral time.
Overshoot or undershoot at the end of
acceleration or deceleration
•
Decrease the ASR gain.
•
Increase the integral time.
Vibration and oscillation occur at constant
speed
•
Decrease the ASR gain.
•
Increase the integral time.
•
Increase the ASR delay time (D04-06).
Oscillation at low speed and response is
too slow at high speed (or vice versa)
-
•
FLV: Use D04-01, D04-02, D04-03,
and D04-04 to define optimal ASR
settings for high and low speed. Use
D04-07 to define a switching frequency.
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