Settings; Fig. 39 Typical Attenuation Curve Of Notch Filter At 50 Hz - Beckhoff EP3744-0041 Documentation

Commissioning/Configuration
Index F80F AI Vendor data Reference
Index (hex) Name
F80F:0 AI Vendor data Refer-
ence
F80F:01 Calibration offset
pressure
F80F:02 Calibration gain pres-
sure
F80F:03 Calibration offset
temp
F80F:04 Calibration gain temp
4.5

Settings

FIR and IIR filter
The EP3744 Box is equipped with a digital filter which, depending on its settings, can adopt the
characteristics of a Finite Impulse Response filter (FIR filter), or an Infinite Impulse Response filter (IIR filter).
The filter can also be deactivated.
The filter characteristics are set via index 0x8020:15
The filter frequencies are set centrally for all channels of the EP3744 Box via index 0x8020:15
(channel 1). The corresponding indices 0x80n0:15 [} 48] of the other channels have no parameteri-
zation function.
FIR filter
The filter works as a notch filter and determines the conversion time of the box. It is parameterized via the
index 0x8020:15 [} 48]. The higher the filter frequency, the faster the conversion time. A 50 Hz and a 60 Hz
filter are available.
Notch filter means that the filter has zeros (notches) in the frequency response at the filter frequency and
multiples thereof, i.e. it attenuates the amplitude at these frequencies.
The FIR filter functions as a non-recursive filter, which can be adjusted by the parameterization of the object
0x8020:15 [} 48].
Fig. 39: Typical attenuation curve of notch filter at 50 Hz
62
Meaning
Version: 2.2
Data type Flags Default
UINT8 RO 0x04 (4
INT32 RW 0x00000000
(0
dec
INT16 RW 0x4000
(16384
INT32 RW 0x00000000
(0
dec
INT16 RW 0x0000 (0
EP3744-0041 and EP3744-1041
)
dec
)
)
dec
)
)
dec