Omron VARISPEED G7 Instruction Manual page 118

Speed Search: b3
User constants for the speed search are shown in the following table.
Name
Con-
stant
Display
Number
Speed Enables/disables the speed
search search function for the run
selection command and sets the speed
(current search method.
detection or 0: Disabled, speed calculation
speed calcu- 1: Enabled, speed calculation
lation) 2: Disabled, current detection
3: Enabled, current detection
Speed Calculation:
When the search is started, the
motor speed is calculated and
b3-01 acceleration/deceleration is
performed from the calculated
speed to the specified
frequency (motor direction is
SpdSrch at
also searched).
Start
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.
Speed Sets the speed search operation
search oper- current as a percentage, taking
ating current the Inverter rated current as
(current 100%.
b3-02
detection) Not usually necessary to set.
When restarting is not possible
SpdSrch
with the factory settings,
Current
reduce the value.
Speed
Sets the output frequency
search
deceleration time during speed
decelera-
search in 1-second units.
tion time
b3-03 Set the time for deceleration
(current
from the maximum output fre-
detection)
quency to the minimum output
SpdSrch
frequency.
Dec Time
Speed
Sets the contactor operating
search wait
delay time when there is a con-
time (cur-
tactor on the output side of the
rent detec-
Inverter. When a speed search
tion or
b3-05
is performed after recovering
speed calcu-
from a momentary power loss,
lation)
the search operation is delayed
Search
by the time set here.
Delay
* The factory setting will change when the control method is changed. (Open-loop vector 1 factory settings are given.)
Setting Factory
Description
Range Setting
0 to 3
0 to
100%
200
0.1 to
10.0
0.0 to
20.0
Control Methods
Change
Open
during
V/f Loop
Opera-
V/f with Vec-
tion
PG tor
1
*
No A A A
2
*
No A No A
2.0 s No A No A
No A A A
0.2 s
User Constant Tables
MEMO
Open
BUS
Flux Loop
Page
Regis-
Vec- Vec-
ter
tor tor
2
No A 191H 6-56
No A 192H 6-56
No No 193H 6-56
A A 195H 6-56
5-
13