X20 system modules • Analog input modules • X20AI4222
X20 system User's Manual 3.10
263
Input ramp limitation is well suited for suppressing disturbances (spikes). The following examples show the function
of the input ramp limitation based on an input jump and a disturbance.
Example 1
The input value jumps from 8,000 to 17,000. The diagram shows the adjusted input value with the following settings:
Input ramp limitation = 4 = 0x07FF = 2047
Filter level = 2
0
8000
17000
t [ms]
Input jump
1
2
3
4
5
6
7
8
Input value
Internally adjusted input value before filtering
Figure 98: Adjusted input value for input jump
Example 2
A disturbance interferes with the input value. The diagram shows the adjusted input value with the following settings:
Input ramp limitation = 4 = 0x07FF = 2047
Filter level = 2
0
8000
16000
t [ms]
1
2
3
4
5
6
7
8
Disturbance (spike)
Input value
Internally adjusted input value before filtering
Figure 99: Adjusted input value for disturbance
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