4-45
4-2 Function Mode
4
Functions
Note 1: You can allocate the momentary power interruption signal (IP: 08) and the undervoltage signal (UV: 09)
to any of multi-function output terminals 11 to 15 selection (C021 to C025) or the relay output terminal
(C026).
Note 2: If power interruption is retained for 1 second or longer, refer to the reset description ("Reset" (page 4-87)).
Restarting Procedure
•Frequency matching restart
This method restarts the Inverter by detecting frequency and rotation direction based on the
motor's residual voltage.
•Active Frequency Matching restart
The Inverter starts output at the frequency set in starting frequency selection b030, and searches
for a point where frequency and voltage are balanced to restart the Inverter, while holding current
at the Active Frequency Matching restart level (b028).
If the Inverter trips with this method, reduce the b028 set value.
(Example 8) b004: 00
Power supply
RUN command
Inverter output
Alarm
Signal during momentary
power interruption (IP)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Inverter is stopped
Power supply
RUN command
Inverter output
Alarm
Signal during momentary
power interruption (IP)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Inverter is running
(Example 9) b004: 01
Power supply
RUN command
Inverter output
Alarm
Signal during momentary
power interruption (IP)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Inverter is stopped
Power supply
RUN command
Inverter output
Alarm
Signal during momentary
power interruption (IP)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Inverter is running
(Example 10) b004: 02
Power supply
RUN command
Inverter output
Alarm
Signal during momentary
power interruption (IP)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Inverter is stopped
Power supply
RUN command
Inverter output
Alarm
Signal during momentary
power interruption (IP)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Inverter is running
OFF
Undervoltage
b003
Inverter
output frequency
Output current
FW
FRS
b028
Decelerates according to b029
Frequency selected in b030
Motor rotation
speed
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