YASKAWA Varispeed G7 Series Instruction Manual page 146

Speed Search: b3
User constants for the speed search are shown in the following table.
Con-
stant
Number
Speed
search
selection
(current
detection or
speed calcu-
lation)
b3-01
SpdSrch at
Start
Speed
search oper-
ating current
(current
b3-02
detection)
SpdSrch
Current
Speed
search
decelera-
tion time
b3-03
(current
detection)
SpdSrch
Dec Time
Speed
search wait
time (cur-
rent detec-
tion or
b3-05
speed calcu-
lation)
Search
Delay
-14
5
Name
Description
Display
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.
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.
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.
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 performed after recovering
from a momentary power loss,
the search operation is delayed
by the time set here.
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
*1
0 to 3 No A
2
0 to
*1
No A
100%
200
0.1 to
2.0 s No A
10.0
0.0 to
0.2 s No A
20.0
MEMO-
Open Open
BUS
V/f Loop Flux Loop
Regis-
with Vec- Vec- Vec-
ter
PG tor tor tor
1 2
A A No A 191H
No A No A 192H
No A No No 193H
A A A A 195H
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