Skip Frequency - Bosch rexroth EFC 610 Series Operating Instructions Manual

Rexroth Frequency Converter EFC x610
Series

12.8.14 Skip Frequency

This function is implemented to define a few skip frequencies to avoid the me-
chanical resonance . If the running frequency is in the hysteresis range of de-
fined skip frequency, the frequency is set to the upper/lower limit automatically
to skip this frequency area.
Code Name
E0.70 Skip frequency 1
E0.71 Skip frequency 2
E0.72 Skip frequency 3
E0.73 Skip frequency range
Skip window accelera-
E0.74
tion factor
The setting ranges of the three skip frequencies are shown in the figure below:
Fig. 12-68: Skip frequency 1
Skip frequency points are defined by parameters E0.70...E0.72. Skip frequency
range or boundaries are defined by parameter E0.73 as listed below:
[Upper boundary frequency] = [Skip frequency] + [E0.73]/2
●
[Lower boundary frequency] = [Skip frequency] - [E0.73]/2
●
If the current 'Output frequency' is higher than the 'Upper boundary frequency',
and the target 'Setting frequency' is within the 'Skip frequency range', the actual
output frequency will be limited to 'Upper boundary frequency'.
If the current 'Output frequency' is lower than the 'Lower boundary frequency',
and the target 'Setting frequency' is within the 'Skip frequency range', the actual
output frequency will be limited to 'Lower boundary frequency'.
If the current 'Output frequency' is within the 'Skip frequency range' and the tar-
get 'Setting frequency' is also within the range, the actual output frequency is
previous output frequency.
Setting range
0.00...[E0.09] Hz
0.00...[E0.09] Hz
0.00...[E0.09] Hz
0.00...30.00 Hz
1...100
R912005854_Edition 09 Bosch Rexroth AG
Functions and Parameters
Default Unit Step
0.00 Hz 0.01
0.00 Hz 0.01
0.00 Hz 0.01
0.00 - 0.01
1 -
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Attri.
Stop
Stop
Stop
Stop
1 Stop