Beckhoff EP31 Series

Configuration
EP31xx 83Version: 2.4
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.
Through the synchronization mode FreeRun the IIR filter operates with an internal cycle time of 180µs (1 or
2 channels) or 500µs (4 channels).
Filter characteristics for IIR filters
IIR filter -3 dB cut-off frequency with 500µs sampling time
IIR 1 400Hz
IIR 2 220Hz
IIR 3 100Hz
IIR 4 50Hz
IIR 5 24Hz
IIR 6 12Hz
IIR 7 6.2Hz
IIR 8 3.0Hz
4.7 Data stream
The following flow chart illustrates the data stream of the EPI31xx (processing of raw data).
Fig.64: Diagram showing the data stream in the EP31xx