Beckhoff EP3744-0041 Documentation page 63

Filter data FIR filter (1-4-channel boxes)
Filter
50 Hz FIR
60 Hz FIR
Filter data FIR filter (8-channel boxes)
Filter
50 Hz FIR
60 Hz FIR
IIR filter
The filter with IIR characteristics is a discrete time, linear, time invariant filter that can be set to eight levels
(level 1 = weak recursive filter, up to level 8 = strong recursive filter).
The IIR can be understood to be a moving average value calculation after a low-pass filter.
By means of the synchronization mode FreeRun, the IIR filter works with an internal cycle time of 500 µs (1,
2 or 4 channels) or 1 ms (8 channels).
Filter data for IIR filter
IIR filter
IIR 1
IIR 2
IIR 3
IIR 4
IIR 5
IIR 6
IIR 7
IIR 8
Conversion time & FIR and IIR filters, index 0x80n0:06 [} 48]
The typical conversion time and trigger mode depend on
• the selected filter setting (default: 50 Hz)
• the setting in the CoE register 0x1C33:01 [} 57]
◦ by manual parameterization in the System Manager. CAUTION: Enter any changes made in the
StartUp list!
◦ by the StartUp list as an automatic parameter download during the EtherCAT start phase.
CAUTION: Entries are implemented only after activation of the configuration!
The conversion time is the time interval in which the EP3744 makes a new measured value available. A new
measured value is displayed by toggling "TxPDO Toggle" (index 0x60n0:10 [} 58]).
Limit 1 and Limit 2, Index 0x80n0:13 [} 48], Index 0x80n0:14 [} 48]
If the limits of the values that can be entered in indices 0x80n0:13 [} 48] and 0x80n0:14 [} 48] are violated,
the bits in indices 0x60n0:03 [} 59] and 0x60n0:05 [} 59] are set accordingly (see sample below). The indices
0x80n0:07 [} 48] or 0x80n0:08 [} 48] serve to activate the limit value monitoring.
Output limit n (2-bit):
• 0: not active
EP3744-0041 and EP3744-1041
Attenuation
> 50 dB
> 40 dB
Attenuation
> 50 dB
> 50 dB
Limit frequency with internal box cycle time 1 ms (-3 dB)
168 Hz
88 Hz
43 Hz
21 Hz
10.5 Hz
5.2 Hz
2.5 Hz
1.2 Hz
Version: 2.2
Commissioning/Configuration
Limit frequency (-3 dB)
22 Hz
26 Hz
Limit frequency (-3 dB)
23 Hz
27 Hz
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