Siemens SIMOVERT MASTERDRIVES Manual page 963

Band-Stop Gain
0.0 ... 150.0 %
P251 (100.0)
Src Band-Stop
P252 (0)
KK
Qty Band-Stop
0.0 ... 3.0
P253.1 (0.0)
Filter frequency
1.0 ... 500.0
P254.1 (50.0)
Filter adaptation 1
0.000 ... 100.000 %
P257.1 (0.000)
Filter adaptation 2
0.000 ... 100.000 %
P258.1 (100.000 %)
Please keep in mind that the resolution of the output variable diminishes as a smaller and
smaller filter frequency (P254) is selected.
This effect does not disturb as much if the filters are connected
- to the system deviation of the speed controller at P238 = 0 (PI controller)
(P252 = KK0152, P228 = KK0158)
- or to the output of the speed controller at P238 = 1 (reference model)
(P252 = K0153 , P260 = KK0158).
In addition, the calculation sequence must be adapted in both cases
(e.g. U963.42 = 5, U963.43 = 2, U963.45 = 3).
Only values in the range of 0 to 20 may be entered in U953.41...45.
1 2
Speed filter
Filter character
0 .. 3
P256.1 (1)
0
1
2
P254 3
P253
1
.7
P257
0
P254 f
1
.7
0
f
P254
P254
P253
1
.7
P258
P257
0
f
P254
Filter 1
3 4
Filter character
0 .. 3
P256.2 (0)
Qty Band-Stop Qty Band-Stop
0.0 ... 3.0
P253.2 (0.0) P253.3 (0.0)
Filter frequency Filter frequency
1.0 ... 500.0 1.0 ... 500.0
P254.2 (50.0) P254.3 (50.0)
Filter adaptation 1 Filter adaptation 1
0.000 ... 100.000 % 0.000 ... 100.000 %
P257.2 (0.000) P257.3 (0.000)
Filter adaptation 2 Filter adaptation 2
0.000 ... 100.000 % 0.000 ... 100.000 %
P258.2 (100.000 %) P258.3 (100.000 %)
Filter 2
The diagrams show examples of typical filter amplitude responses. The exact
bode diagram depends on the choosen parameters.
Transfer function for filter with 2nd order numerator denominator polynomial
for P256 = 1/3 :
2
2 d s
Z
1 s
2
Z Z
F
2
2 d s
N
1 s
2
N N
s j
5 6
V2.4
fp_mc_361_e.vsd
02.02.04
Filter character
U953.42 = P357
0 .. 3
P256.3 (0)
n(Band-Stop)
KK0158
0.0 ... 3.0
Filter 3
2 P254
Z
P258 , , for P256 = 1
N Z N Z
1 P257
d
Z
2 P253
1
d
N
2 P253
7 8
Function diagram
MASTERDRIVES MC
- 361 -