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5
-10
Speed Search: b3
User constants for the speed search are shown in the following table.
Constant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control
Methods
MEMOBUS
Register
Open-
loop
Vector
Flux
Vector
Display
b3-01
Speed search
election (current
detection or speed
calculation)
Enables/disables the speed
search function for the Run
Command and sets the speed
search method.
0: Disabled, speed calculation
1: Enabled, speed calculation
2: Disabled, current detection
3: Enabled, current detection
Speed Calculation:
When the search is started, the
motor speed is calculated and
acceleration/deceleration is
performed from the calculated
speed to the specified
frequency (motor direction is
also searched).
Current Detection:
The speed search is started
from the frequency when
power was momentarily lost
and the maximum frequency,
and the speed is detected at the
search current level.
0 to 3
0
*
No
A
A
1C0H
SpdSrch at Start
b3-02
Speed search
operating current
(current detection)
Sets the speed search operation
current as a percentage, taking
the Inverter rated current as
100%.
Not usually necessary to set.
When restarting is not possible
with the factory settings, reduce
the value.
0 to
200
30%
*
No
A
No
1C1H
SpdSrch Current
b3-03
Speed search
deceleration time
(current detection)
Sets the output frequency
deceleration time during speed
search in 1-second units.
Set the time for deceleration
from the maximum output fre-
quency to the minimum output
frequency.
0.1 to
10.0
2.0 s
No
A
No
1C2H
SpdSrch Dec Time
b3-05
Speed search wait time
(current detection or
speed calculation)
Sets the magnetic contactor
operating delay time when
there is a magnetic contactor on
the output side of the Inverter.
When a speed search is per-
formed after recovering from a
momentary power loss, the
search operation is delayed by
the time set here.
0.0 to
20.0
0.2 s
No
A
A
1C4H
Search Delay