Beckhoff EP3751-0160 Documentation page 31

5.2.4.2 Configure
In parameters 80n00:15 "Filter settings" you can choose between several predefined filter configurations.
The factory setting is "IIR1".
Possible values for "Filter settings":
Value Filter configuration
0 50Hz FIR
1 60Hz FIR
2 IIR1 (factory setting)
3 IIR2
4 IIR3
5 IIR4
6 IIR5
7 IIR6
8 IIR7
9 IIR8
For a description of the FIR and IIR filter categories, see the chapter Filter categories FIR and IIR [} 31].
5.2.4.3 Filter categories FIR and IIR
FIR filter
The FIR filter is a non-recursive notch filter. A notch filter has zeros (notches) in its frequency response at the
filter frequency and multiples of the filter frequency. These frequencies are therefore attenuated in amplitude.
Example of a typical attenuation curve of a notch filter with 50 Hz filter frequency:
0
-10
-20
-30
-40
-50
-60
1
10
IIR filter
The IIR filters are low-pass filters.
IIR1 has the highest cut-off frequency, IIR8 has the lowest cut-off frequency.
EP3751-0160
Frequency [Hz]
Version: 1.0
Commissioning and configuration
2
10
31