5-14
Speed Search: b3
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
MEMO-
BUS
Regis-
ter
Page
b3-01
Speed search
selection (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 2 No A 191H 6-39
b3-02
Speed search
operating current
(current detection)
Sets the speed search operation cur-
rent as a percentage, taking the
Inverter rated current as 100%.
Usually not necessary to set. When
restarting is not possible with the
factory settings, reduce the value.
0 to
200
120% No A 192H 6-39
b3-03
Speed search
deceleration time
(current detection)
Sets the output frequency decelera-
tion time during speed search in 1-
second units.
Sets the time for deceleration from
the maximum output frequency to
the minimum output frequency.
0.1 to
10.0
2.0 s No A 193H 6-39
b3-05
Speed search wait
time (current
detection or speed
calculation)
When a speed search is performed
after recovering from a momentary
power loss, the search operation is
delayed for the time set here.
If e.g. a contactor is used at the out-
put side of the inverter set this con-
stant to the contactor delay time or
more.
0.0 to
20.0
0.2 s No A 195H 6-39
b3-14
Bi-directional
speed search
selection
Can be used to turn off the bi-direc-
tional capabilities of the speed cal-
culation form of speed search.
Then speed search will only be per-
formed in the last known direction.
0: Disabled
1: Enabled
0 or 1 1 No A 19EH 6-39
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