EM15 User’s Manual
5. Description of Function Codes
73
bb-19
Detection value of too large speed deviation
Default
20.0%
Setting Range
0.0%~50.0% (maximum frequency)
bb-20
Detection time of too large speed deviation
Default
5.0s
Setting Range
0.0s~60.0s
This function is valid only when the frequency inverter runs in the VC+PG mode.
If the frequency inverter detects the deviation over than bb-19 between the actual motor rotational and the setting
motor frequency, and the duration time exceeds the value of bb-20, the frequency inverter reports Err42 and act
according to the selected fault protection action.
If bb-20 (Detection time of too large speed deviation) is 0.0s, this function is disabled.
bb-21
Action selection at instantaneous power failure
Default
0
Setting
Range
0
Invalid
1
Decelerate
2
Decelerate to stop
bb-22
Judging voltage of instantaneous power failure restoring
Default
85.0%
Setting Range
60.0%~100.0%(standard bus voltage)
bb-23
judging time of Instantaneous power rise
Default
0.50s
Setting Range
0.00s~100.00s
bb-24
Judging voltage of instantaneous power failure
Default
80.0%
Setting Range
60.0%~100.0% (standard bus voltage)
Of instantaneous power failure or sudden voltage dip, the DC bus voltage of the Frequency inverter reduces. This
function enables the Frequency inverter to compensate the DC bus voltage reduction with the load feedback
energy by reducing the output frequency so as to keep the Frequency inverter running continuously.
⚫
If bb-21 = 1, when instantaneous power failure or sudden voltage dip, the frequency inverter decelerates until
DC bus voltage restore to normal, the frequency inverter accelerates to the set frequency. If the DC bus voltage
remains normal for the time exceeding the value set in bb-22, it is considered that the DC bus voltage restores
to normal.
⚫
If bb-21 = 2, when instantaneous power failure or sudden voltage dip, the frequency inverter decelerates to
stop.
