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Customizing for Your Application 8-15
8.7 Speed Search
The following table shows 4 types of Speed search selections.
H23: Limits current during Speed search. Set as a percentage of H33.
H24, H25: Speed search is activated via PI control. Adjust P gain and I gain
corresponding to the load characteristics.
t32, t33: Signal of active Speed search is given to external sequence via Multi-function
output terminal (MO) and Multi-function relay output (3ABC).
Group Display Parameter Name Setting Range Default Unit
Function
group 2
H22 [Speed Search Selection] - 0 to 15 0
H23 [Current Level] - 80 to 200 100 %
H24 [Speed Search P Gain] -
0 to 9999
100
H25 [Speed Search I Gain] - 200
I/O group
t32 [Multi-function Output
Terminal Selection]
15
0 to 18
12
t33 [Multi-function Relay Selection] 15 17
This is used to prevent possible faults from occurring if the inverter outputs the voltage during operation
after the load is removed.
The inverter estimates the motor rpm based on output current. Therefore, detecting exact speed is
difficult.
H22
Speed Search
During
H20[Power ON
Start]
Speed Search
During Instant
Power Failure
Restart
Speed Search
During
H21[Restart After
Fault Reset]
Speed Search
During
Acceleration
Bit 3Bit 2Bit 1Bit 0
0- - - -
1- - -
2- - -
3- -
4- --
5-
-
6- -
7-
8 ---
9
--
10 - -
11
-
12 --
13
-
14 -
15