Mitsubishi Electric FR-A700 Technical Manual page 261

2.9.7 Notch filter [Pr. 862, 863]
You can reduce the response level of speed control in the
resonance frequency band of the mechanical system to
avoid mechanical resonance.
[Pr. ] Name
862 Notch filter time constant
863 Notch filter depth
(1) Notch filter time constant [Pr. 862]
If you do not know the mechanical resonance
frequency, decrease notch frequency gradually from
the highest value. The point at which the smallest
vibration is generated is the notch frequency setting.
Machine characteristic can be obtained beforehand
with machine analyzer
Necessary notch frequency can be determined from
this.
[Pr. 862]
Frequency
Setting
0 Invalid
1 1000
2 500
3 333.3
4 250
5 200
6 166.7
7 142.9
8 125
9 111.1
10 100
11 90.9
12 83.3
13 76.9
14 71.4
15 66.7
16 62.5
17 58.8
18 55.6
19 52.6
20 50
21 47.6
22 45.5
23 43.5
24 41.7
25 40
26 38.5
27 37
28 35.7
29 34.5
A700
(A700)
Initial Value Setting Range
0
0
by FR Configurator.
[Pr. 862]
Frequency
Setting
30 33.3
31 32.3
32 31.3
33 30.3
34 29.4
35 28.6
36 27.8
37 27.0
38 26.3
39 25.6
40 25.0
41 24.4
42 23.8
43 23.3
44 22.7
45 22.2
46 21.7
47 21.3
48 20.8
49 20.4
50 20.0
51 19.6
52 19.2
53 18.9
54 18.5
55 18.2
56 17.9
57 17.5
58 17.2
59 16.9
60 16.7
295
0 to 60 Refer to the following table
0 to 3
0 (deep) 3 (shallow)
(2) Notch filter depth [Pr. 863]
The notch filter with deeper depth has an effect on
minimizing mechanical resonance. However, large
vibration may be generated adversely due to
substantial phase delay. Adjust notch depth from the
shallower depth.
Setting 3
Depth Shallow
-
Gain 4dB
PARAMETER
Description
2 1 0
Deep
- - -
8dB 14dB 40dB
2