IMPULSE®•G+ & VG+ Series 4 Instruction Manual – February 2017
5-58
Adjusting the ASR Parameters in FLV
The drive is preset to use ASR settings D04-01/02 over the entire speed range in FLV. If required by
the application, a second set of ASR parameters (D04-03/04) can be automatically activated
depending on the motor speed or by using a digital input. Refer to the description in D04-01/D04-02
and D04-03/D04-04 on page 5-59.
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.
Solving Problems During ASR Setup
Use Table 5-46 when making adjustments to ASR.
Table 5-46: 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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