Moeller DF51 - Suppressing Frequency Ranges

Setting parameters
10/05 AWB8230-1541GB
96
Suppressing frequency ranges
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. 96), 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 0.5 Hz in the example.
The jump width (PNU A064) is the range above and below the
selected frequency value (PNU A063). With PNU A063 set to 1 Hz
and A064 to 15 Hz the range from 14.5 Hz to 15.5 Hz is
suppressed.
In this example, the drive can be operated in the following
frequency ranges:
• 0 to 14.5 Hz.
• 15.5 to 24.5 Hz.
• 25.5 to 34.5 Hz.
• 35.5 to f
max
.
Static operation in the suppressed frequency ranges is not
possible.
Figure 96: Frequency jumps
a Acceleration
b Deceleration
0
15
25
35
f
t
[Hz]
f
max
A067
A065
A063
A064
A064
a
b
PNU Name RUN b031
= 10
Value Function DS
A063 Frequency
jump (1)
– j 0 – 400 Hz This function can be deactivated by entering 0.0 0.0
A064 Frequency
jump (1) –
jump width
0 – 10 Hz 0.5
A065 Frequency
jump (2)
0 – 400 Hz 0.0
A066 Frequency
jump (2) –
jump width
0 – 10 Hz 0.5
A067 Frequency
jump (3)
0 – 400 Hz 0.0
A068 Frequency
jump (3) –
jump width
0 – 10 Hz 0.5