B2: Acceleration
4.2 Functions
Basic Functions
246
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
• "Real bandstop filter":
When identical numerator and denominator natural frequencies are selected (=blocking frequency). If you
select (numerator) damping setting zero, the blocking frequency is equivalent to complete attenuation.
In this case the 3 dB bandwidth is determined on the following basis:
f
bandwidth
= 2 * f
block.
If instead of complete attenuation, a reduction by a factor of k is all that is required, then the numerator
damping should be selected in accordance with k.
• "Bandstop filter with additional amplitude response increase/decrease at high frequencies":
In this case, the numerator and denominator natural frequencies are set to different values. The numerator
natural frequency determines the blocking frequency. By selecting a lower (higher) denominator natural
frequency than the numerator natural frequency, you can increase (decrease) the amplitude response at high
frequencies. An amplitude response increase at high frequencies can be justified in most cases, as the
controlled system generally possesses a lowpass characteristic itself, i.e., the amplitude response drops at
high frequencies anyway.
4.2.19.2
Parameterization
Activation
The jerk filter is activated using the machine data:
MD32400 $MA_AX_JERK_ENABLE = TRUE
The jerk filter is active in all operating modes and with all types of interpolation.
Filter mode
The mode is selected using the machine data:
MD32402 $MA_AX_JERK_MODE =
mode
Mode = 1
(2nd-order filter)
Mode = 2
(Sliding mean value generation)
Mode = 3
(Bandstop filter)
