8-16
8.11 Speed search
Group Display Parameter Name Setting Range Default Unit
Function
group 2
H22 [Speed search select] -
0 ~ 15 0
H23 [Current level] - 80 ~ 200 100 %
H24 [Speed search P gain] -
0 ~ 9999
100
H25 [Speed search I gain] - 200
I/O group I54
[Multi-function output
terminal select]
15
0 ~ 18
12
I55 [Multi-function relay select] 15 17
This is used to prevent possible fault 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.
The following table shows 4 types of Speed search selection.
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 3 Bit 2 Bit 1 Bit 0
0 - - - -
1 - - -
9
2 - -
9
-
3 - -
9 9
4 -
9
- -
5 -
9
-
9
6 -
9 9
-
7 -
9 9 9
8
9
- - -
9
9
- -
9
10
9
-
9
-
11
9
-
9 9
12
9 9
- -
13
9 9
-
9
14
9 9 9
-
15
9 9 9 9
H23: Limits current during Speed search. Set as the percent of H33.
H24, H25: Speed search is activated via PI control. Adjust P gain and I gain corresponding to
the load characteristics.
I54, I55: Signal of active Speed search is given to external sequence via Multi-function output
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