N700 Operating Instructions and Parts Manual
8. Explanation of b-Group
74
Code
Function name
Initial
value
Unit
Setting
range
Contents
trip. (Ex.2)
b018 Retry wait time
1.0
Sec. 0.3~100.0 Delay before motor restart time.
0
Invalid : Trip isn't caused and alarm isn't output
1
Valid : Trip is caused and alarm is output
2
Invalid : Trip isn't caused and alarm isn't output
during stop and deceleration by stop command.
b019
Instantaneous
power
failure/under-
voltage trip
during stop
0 -
3
Always Invalid : Trip isn’t caused and alarm isn’t
output during use DC power source at P-N terminal.
(Applicable only instantaneous power failure)
b020
Frequency
setting to
match
0.00 Hz
0.00~400.
0
When the frequency of the motor during free-run is
less than this set frequency, restart with 0Hz is
caused.(Ex. 3,4)
Table 8- 15 Instantaneous power failure restart (b016~b020)
Frequency matching start
:
The inverter reads the motor RPM and direction and restarts
the inverter to match these readings without motor stop.
NOTE 1)
When trip of the over voltage or over current occurs in the deceleration time, an
instantaneous power failure (E016) is displayed and the inverter goes into free-
run. In this case, make the deceleration time long.
If the code b006 is set “1”, the inverter free-run stops after frequency maching.
NOTE 2)
When the overvoltage or overcurrent trip is occur, please increase the retry wait
Time (b018).
Invariable case (b018) : Under 2sec.(22~55kW) / Under 5sec.(75~132kW)
④
When a retry function (b016) value is set to 2, the timing chart is following.
t0 : Instantaneous stop power failure
t1 : Allowable under-voltage power failure time(b017)
t2: Retry wait time(b018)
Fig. 8- 2 Example of frequency matching start
