Restart Functions; Frequency Matching Restart And Frequency Pull-In Restart - Omron SYSDRIVE MX2 SERIES User Manual

5-8 Restart Functions

The following explains the operations performed upon restart.

Frequency Matching Restart and Frequency Pull-in Restart

The 3G3MX2 provides two restart methods, frequency matching restart and frequency pull-in
restart, which can be selected using the functions described below.
Functions relating to frequency
matching restart and frequency
pull-in restart
b001
→Refer to 5-96 page.
Overvoltage/Overcurrent
b008
→Refer to 5-97 page.
Reset Restart Selection
C103
→Refer to 5-101 page.
Free-run Stop Selection
b088
→Refer to 5-103 page.
Both the frequency matching restart and frequency pull-in restart functions are provided to
allow for restart without stopping the motor running freely. The Digital Operator displays
until restart, after output is shut off.
okokoko
This method restarts the Inverter by
detecting frequency based on the motor's
residual voltage.
Function
The Inverter can be restarted smoothly.
Advantages
The Inverter cannot be restarted if the
residual voltage is at a certain level or
Disadvantages
below (in which case the Inverter restarts
at 0 Hz).
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Selection of restart method upon cutoff of
Retry Selection
output after detection of momentary power
interruption/undervoltage
Selection of restart method upon cutoff of
Restart Selection output after detection of overvoltage/
overcurrent
Selection of restart method upon reset
Selection of restart method after
cancellation (turning ON and OFF) of free-
fun stop input
Frequency matching restart

5-8 Restart Functions

Description
Frequency pull-in restart
The Inverter starts output at the frequency set
in Starting Frequency (b030), and searches
for a point where the frequency and voltage
are balanced, while holding the current at the
setting of Restart Current Level (b028), to
restart itself.
If the Inverter trips with this method, reduce
the b028 set value.
The Inverter can be restarted regardless of
whether or not there is residual voltage.
Shock may occur upon restart.
(The current may surge. If an overcurrent trip
occurs, also use Overcurrent Suppression
Function b027.)
Default
Unit
setting
−
00
00 −
−
00
5
00 −
5-94