N: Special Adjustments - YASKAWA FSDrive-MV1S Instructions Manual

N: Special Adjustments

The following settings are made with the special adjustments constants (N constants): Speed feedback detec-
tion control.
Speed Feedback Detection Control Functions: n2
User constants for speed feedback detection control functions are shown in the following table.
Name
Constant
Number
Display
Speed feedback
detection control
(AFR) gain
n2-01
AFR Gain
Speed feedback
detection control
n2-02
(AFR) time constant
AFR Time
Speed feedback
detection control
n2-03 (AFR) time constant 2
AFR Time 2
Starting gain for AFR
gain change
n2-05
AFR G of Start
Setting
Description
Range
Set the internal speed feedback
detection control gain using the
multiplication function.
Normally, there is no need to
make this setting.
Adjust this constant as follows:
0.00 to
• If hunting occurs, increase
10.00
the set value.
• If response is low, decrease
the set value.
Adjust the setting by 0.05 at a
time, while checking the
response.
Set the time constant to decide
the rate of change in the speed
2000
feedback detection control.
Increase the setting if overvolt-
age (OV) failures occur at the
completion of acceleration or
2000
when the load changes radi-
cally.
Set the gain to the AFR gain in
0 Hz.
0.00 to
The hunting by AFR is con-
trolled at the time of a low
speed (0-12 Hz).
User Constant Tables
Change
Factory
during
Open-
Setting
Operation
loop
Vector
2.00 No A
0 to
250 ms No A
0 to
750 ms No A
0.20 No A
2.00
Control
Methods
MEMOBUS
Register
Flux
Vector
No 5D0H
No 5D1H
No 5D2H
No 5D4H
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