Frequency Pull-In Restart - Omron MX2 Series User Manual

7 Other Functions

Frequency pull-in restart

Frequency pull-in restart causes the inverter to restart by outputting the starting frequency set in the
Starting Frequency Selection at Frequency Pull-in Restart (b030) to the motor in a free-run stop
state and re-accelerating when the Frequency Pull-in Restart Level (b028) is reached.
This enables a smooth restart independent of the voltage between motor terminals.
Use this setting when the inverter is in free-run state for a long time due to a large load inertia.
In the PM motor mode, the inverter does not display "Frequency pull-in restart" for selection func-
tions.
FW input
(Forward)
Power supply
Output current
Inverter output
frequency
Motor rotation
speed
The main parameters associated with frequency matching restart and frequency pull-in restart are as
shown in the table below.
For details on free-run stop, refer to 5-7-2 Free-run Stop Selection on page 5-39.
Parameter
No.
b003 Restart Standby Time
Frequency Matching
b007
Lower Limit Frequency
Frequency Pull-in Restart
b028
Level
Frequency Pull-in Restart
b029
Parameter
Starting Frequency Selec-
b030 tion at Frequency Pull-in
Restart
7 - 62
b003
Function name
0.3 to 100.0
Set the wait time until the inverter restarts.
0.00 to 400.0
The inverter will restart from 0 Hz if the fre-
quency when the motor is in a free-run state
drops to the b007 value or lower.
0.20 × Rated current to 2.00 × Rated current
0.1 to 999.9
1000. to 3000.
Set the deceleration rate for the output fre-
quency during frequency pull-in restart.
Set the deceleration time from the maximum
frequency to 0 Hz.
00:
01:
02:
Decelerates according to b029
b028
Frequency selected in b030
Data
Frequency at shutoff
Maximum frequency
Set frequency (Frequency reference)
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Default
Unit
data
1.0 s
0.00 Hz
Rated
current of A
inverter
0.5 s
−
00