Setting Parameters
01/02 AWB8230-1413GB
114
Operating frequency range
You can limit the frequency range specified under PNU b082
(starting frequency) and PNU A004 (end frequency) with
PNU A061 and A062 (
a
fig. 112). As soon as the frequency
inverter receives a start command, it applies the frequency set
under PNU A062.
To prevent resonances occurring in the drive system, you can, in
addition, program three frequency jumps under PNU A063 to
A068. In the example (
a
fig. 113), the first frequency jump
(PNU A063) is at 15 Hz, the second (PNU A065) at 25 Hz and the
third (PNU A067) at 35 Hz. The jump widths (adjustable under
PNU A064, A066 and A068) are set to 1 Hz in the example.
Figure 112: Upper frequency limit (PNU A061) and lower frequency
limit (PNU A062)
PNU A062
PNU b082
0
10
PNU A061
PNU A004
f
U
[V]
[Hz]
Figure 113: Frequency jumps
0
15
25
35
f
t
0.5 Hz
0.5 Hz
15 Hz
PNU A064
[Hz]
>
<
>
<
PNU
Name
Adjustable in RUN mode
Value
Function
WE
Normal
Extended
A061
A261
Maximum operating
frequency
–
j
0 to 400 Hz
This function can be deactivated by entering 0.0
0.0
A062
A262
Minimum operating
frequency
0 to 400 Hz
0.0
A063
First frequency jump
0 to 400 Hz
0.0
A064
First jump width
0 to 10 Hz
0.5
A065
Second frequency jump
0 to 400 Hz
0.0
A066
Second jump width
0 to 10 Hz
0.5
A067
Third frequency jump
0 to 400 Hz
0.0
A068
Third jump width
0 to 10 Hz
0.5
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