Omron VARISPEED F7 User Manual page 113

Speed Search: b3
Name
Param-
eter
Num-
Display
ber
Speed
search
selection
(current
detection or
speed cal-
culation)
b3-01
SpdSrch at
Start
5
Speed
search
operating
current
b3-02
(current
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 cal-
culation)
Search
Delay
Speed
Search
Compensa-
tion Gain
(speed cal-
b3-10
culation
only)
Srch Detect
Comp
12
5-
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 per-
formed 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 or the maxi-
mum frequency. The speed is
detected by observing the cur-
rent.
Sets the speed search operation
current 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 decel-
eration time during speed search
in 1-second units.
Sets the time for deceleration
from the maximum output fre-
quency to the minimum output
frequency.
When a speed search is per-
formed 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
output side of the inverter set
this parameter to the contactor
delay time or more.
Sets the gain, which is applied to
the estimated speed before the
motor is restarted.
Change
Setting Factory during
Range Setting Opera-
V/f
tion
* 1
0 to 3 No A
2
* 2
0 to
100%
No A
200
0.1 to
2.0 s No A
10.0
0.0 to
0.2 s No A
20.0
1.00 to
1.10 No A
1.20
Control Methods
MEMO-
V/f Open Closed
BUS
with Loop Loop
Register
PG Vector Vector
A A No 191H
No A No 192H
No A No 193H
A A A 195H
No No No 19AH
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