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7 Detailed Functions
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
7-4 Detailed Functions (Group b)
7
Parameter
No.
Function name Data Default data Unit
b088 Free-run Stop Selection
00: 0-Hz restart
01: Frequency matching restart
02: Frequency pull-in restart
00 –
b003 Restart Standby Time 0.3 to 100.0 1.0 Hz
b007
Frequency Matching Lower
Limit Frequency
0.00 to 99.99
100.0 to 400.0
0.00 s
b028
Frequency Pull-in Restart
Level
Heavy
load (CT)
0.20 x Rated current to
2.00 x Rated current
(0.4 to 55 kW)
Rated current
value
A
0.20 x Rated current to
1.80 x Rated current
(75 to 132 kW)
Light load
(VT)
0.20 x Rated current to
1.50 x Rated current
Rated current
value
b029
Frequency Pull-in Restart
Parameter
0.10 to 30.00 0.50 s
b030
Starting Frequency Selection
at Frequency Pull-in Restart
00: Frequency at shutoff 00 –
(Example 1) 0-Hz restart (b088 = 00) (Example 2) Frequency matching restart (b088 = 01)
• The inverter restarts at 0 Hz independent of the
motor rotation speed.
The Restart Standby Time setting will be ignored
during 0-Hz restart.
• If the inverter starts at 0 Hz at a high motor rotation
speed, an overcurrent trip may occur.
• When the restart standby time elapses after the
FRS terminal is turned OFF, the inverter pulls in the
motor frequency to execute the frequency matching
restart function without stopping the motor rotation.
If an overcurrent trip occurs during a frequency
matching restart, increase the restart standby time.
• Even when the Free-run Stop Selection is set to 01
(Frequency matching start), the inverter may restart
at 0 Hz in the following cases.
• The output frequency is equal to or lower than 1/2
of the base frequency.
• The motor induction voltage decreases quickly.
• The inverter recognizes that the detected
frequency is equal to or less than the value set in
the Frequency Matching Lower Limit Frequency
(b007).
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