FUNCTION CODES
Chap 5
■ Restart mode after momentary power failure (Restart timer) (H13) (Exclusive to V/f control for IM)
H13 set the time until restart is performed after momentary power failure occurred. (At auto-searching setting,
use H46 (auto search holding time 2)).
Restarting at the state when residual voltage of the motor is high, inrush current becomes greater or temporarily
becomes at regeneration state, and overcurrent alarm may occur. For security reason, in order to restart after
residual voltage is reduced to some extent, adjust H13. Even if auto-restarted, restart cannot be performed until the
holding time (H13) elapses.
Factory default: At the factory default state, setting is performed so that it is appropriate to the standard motor
(refer to “5.2.3 Factory default value per applicable electric motor capacitance“). Basically, there
is no need to modify the default setting. However, when problems occur due to the long holding
time or decrease in flow rate of pump becomes significant, change to about half of the standard
value and make sure that alarm etc. will not occur.
■ Restart Mode after Momentary Power Failure (H14)(Exclusive to V/f control for IM)
At momentary power failure restart operation, when inverter output frequency and motor rotation speed does not
synchronize, overcurrent occurs and current limiter will operate. when current limit is detected, automatically
decrease the output frequency and synchronize with the motor rotation speed. H14 sets the slope of lowering
output frequency (frequency lowering rate in Hz/s).
H14 data Output frequency lowering operation
0.00 Decrease by the selected deceleration time.
0.01 to 100.00 (Hz/s) Decrease by the lowering rate that is set by H14.
999
Depending on the PI regulator of current limiting processing (PI constant is
fixed value within the inverter), the rate will decrease.
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