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Chapter 6 - Parameter Description [FU2]
6-19
This function is used to permit automatic restarting after
Power ON, Fault Reset, and Instant Power Failure without
waiting for the motor to stop.
The speed search gain should be set after considering the
inertia moment (GD
2
) and magnitude of torque of the load.
FU2-37 [Load Inertia] must be set at the correct value to
make this function operate correctly.
FU2-22 [Speed Search Select]
Setting Range
4
th
bit 3
rd
bit 2
nd
bit 1
st
bit
Description
0 0 0 0 Speed search function does not work
0 0 0 1 Speed search during Accelerating
0 0 1 0
Speed search during a Fault Reset
restarting (FU2-21) and Auto restarting
(FU2-26)
0 1 0 0
Speed search during Instant Power
Failure restarting.
1 0 0 0
Speed search during Power ON
starting (FU2-20)
When FU2-22 is set to ‘1111’, Speed Search works for all
conditions.
FU2-22 [Speed Search Selection] selects the speed
search function.
FU2-23 [Current Limit Level] is the current that the inverter
limits its current rise during speed searching. (The set
value is the percentage of FU2-33 [Rated Motor Current])
FU2-24 [P Gain] is the proportional gain used for speed
search. Set this value according to load inertia set in FU2-
37.
FU2-25 [I Gain] is the Integral gain used for speed search.
Set this value according to load inertia set in FU2-37.
[Speed Search Operation]
FU2-26: Number of Auto Restart Attempt
FU2-27: Delay Time Before Auto Restart
Input Power
Time
Motor Speed
Time
Output Frequency
Output Voltage
Time
Time
Input Power loss
FU2
►
SS Sup-Curr
23 100 %
100 23
Factory Default: 100 % 100
FU2
►
SS P-gain
24 100
100 24
Factory Default: 100 100
FU2
►
SS I-gain
25 1000
1000 25
Factory Default: 1000 100
FU2
►
Retry number
26 0
0 26
Factory Default: 0 0
FU2
►
Retry delay
27 1.0 sec
1.0 27
Factory Default: 1.0 sec 1.0
Related Functions: FU2-20 [Power ON Start]
FU2-21 [Restart after Fault Reset]
FU2-26 ~ FU2-27 [Auto Restart]
FU2-30 ~ FU2-37 [Motor Parameters]