Santerno Sinus M, User Manual

Page: 128 / 219

10-28
10.11 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 occurring if the inverter supplies a load in movement
(For example if the inverter is disabled, the motor idles; if the inverter is enabled when the
motor is idling, it will search the motor speed).

The inverter estimates the motor rpm based on output current when speed search is
active.

The following table shows 4 types of Speed search selection.
H22 Speed search H20
is set 1 [Power ON
start]
Speed search after
Instant Power
Failure restart
Speed search if
H21 is set 1
[Restart after fault
reset]
Speed search
during Acceleration
Bit 3 Bit 2 Bit 1 Bit 0
0 - - - -
1 - - -

2 - -

-
3 - -
 
4 -

- -
5 -

-

6 -
 
-
7 -
  
8

- - -
9

- -

10

-

-
11

-
 
12
 
- -
13
 
-

14
  
-
15
   

H23: Limits current during Speed search. Set as the percent of H33.

H24, H25: Speed search is managed by a PI control. Adjust P gain and I gain corresponding to the load
characteristics.

I54, I55: Signal of active Speed search is given to Multi-function output terminal (MO) and Multi-function
relay output (3ABC).