YASKAWA Varispeed f7

User Constant Tables
5-13
Speed Search: b3
User constants for the speed search are shown in the following table.
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Page
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
b3-01
Speed
search
selection
(current
detection or
speed calcu-
lation)
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
*1
No A A A No 191H 6-68
b3-02
Speed
search oper-
ating cur-
rent (current
detection)
Sets the speed search opera-
tion current as a percentage,
taking the Inverter rated cur-
rent as 100%.
Not usually necessary to set.
When restarting is not possi-
ble with the factory settings,
reduce the value.
0 to
200
120%
*1
No A No A No 192H 6-68
b3-03
Speed
search
decelera-
tion 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
frequency to the minimum
output frequency.
0.1 to
10.0
2.0 s No A No A No 193H 6-68