5-94
5-8 Restart Functions
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
5
Functions
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.
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.
Functions relating to frequency
matching restart and frequency
pull-in restart
Description
Default
setting
Unit
b001
Retry Selection
→Refer to 5-96 page.
Selection of restart method upon cutoff of
output after detection of momentary power
interruption/undervoltage
00 −
b008
Overvoltage/Overcurrent
Restart Selection
→Refer to 5-97 page.
Selection of restart method upon cutoff of
output after detection of overvoltage/
overcurrent
00 −
C103
Reset Restart Selection
→Refer to 5-101 page.
Selection of restart method upon reset
00 −
b088
Free-run Stop Selection
→Refer to 5-103 page.
Selection of restart method after
cancellation (turning ON and OFF) of free-
fun stop input
00 −
okokoko
Frequency matching restart Frequency pull-in restart
Function
This method restarts the Inverter by
detecting frequency based on the motor's
residual voltage.
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.
Advantages
The Inverter can be restarted smoothly. The Inverter can be restarted regardless of
whether or not there is residual voltage.
Disadvantages
The Inverter cannot be restarted if the
residual voltage is at a certain level or
below (in which case the Inverter restarts
at 0 Hz).
Shock may occur upon restart.
(The current may surge. If an overcurrent trip
occurs, also use Overcurrent Suppression
Function b027.)
To Next Page
Loading...
