YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 101

Speed Search: b3
Con-
stant
Number
Speed search
selection (current
b3-01
detection or speed
calculation)
Speed search
b3-02 operating current
(current detection)
Speed search
b3-03 deceleration time
(current detection)
Speed search wait
time (current
b3-05
detection or speed
calculation)
Bi-directional
b3-14 speed search
selection
-14
5
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Name Description
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 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.
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.
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.
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
Change
Access
during
Setting Factory
Range Setting Level
Opera-
tion
0 to 3 2 No A
0 to
120% No A
200
0.1 to
2.0 s No A
10.0
0.0 to
0.2 s No A
20.0
0 or 1 1 No A
MEMO-
BUS
Page
Regis-
ter
191H 6-39
192H 6-39
193H 6-39
195H 6-39
19EH 6-39