YASKAWA Varispeed F7 Instruction Manual page 121

Speed Search: b3
User constants for the speed search are shown in the following table.
Con-
Name
stant
Number
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
search Speed Calculation:
selection When the search is started,
b3-01 (current the motor speed is
detection or calculated and acceleration/
speed calcu- deceleration is performed
lation) 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.
Sets the speed search opera-
tion current as a percentage,
Speed
taking the Inverter rated cur-
search oper-
rent as 100%.
b3-02 ating cur-
Not usually necessary to set.
rent (current
When restarting is not possi-
detection)
ble with the factory settings,
reduce the value.
Sets the output frequency
Speed deceleration time during
search speed search in 1-second
decelera- units.
b3-03
tion time Set the time for deceleration
(current from the maximum output
detection) frequency to the minimum
output frequency.
Setting
Description
Range
0 to 3
0 to
200
0.1 to
10.0
Control Methods
Change
Open
Factory during
V/f
Loop
Setting Opera-
V/f with
Vec-
tion
PG
*1
No A A
2
120%
No A No
*1
2.0 s No A No
User Constant Tables
MEMO
BUS
Flux Page
Regis-
Vec-
ter
tor
tor
A No 191H 6-68
A No 192H 6-68
A No 193H 6-68
5-
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