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5 Basic Settings
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
5-8 Reset Method Settings
5
5-8-2 Restart after Resetting
(Example 1) Frequency matching restart
Setting Reset Restart Selection (C103) to 01 (Frequency matching restart) causes the inverter
to perform frequency matching restart also after the power supply is turned off and then on
again.
Also, when it is set to 00 (0-Hz restart), the Restart Standby Time (b003) will be ignored.
However, even when the Setting Reset Restart 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).
(Example 2) Frequency pull-in restart
When the set Restart Standby Time (b003) elapses, the inverter starts output at the frequency
set in the Starting Frequency Selection at Frequency Pull-in Restart (b030).
Then, the inverter decelerates the motor according to the Frequency Pull-in Restart Parameter
(b029) setting, while suppressing the output current to the value set in the Frequency Pull-in
Restart Level (b028).
When the current decreases to or below the Frequency Pull-in Restart Level (b028), the inverter
accelerates the motor again to return to the original frequency.
If this method causes an overcurrent trip, decrease the value set in the Frequency Pull-in Restart
Level (b028).
Power supply
FW
Motor rotation speed
Free running
Frequency matching
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