January 2012 6.16 The Control Loop 861
6.16.11 Filter order for separate low-pass filter in the speed controller on the CC 61xx and
CC 424:
Application If a low-pass filter is used with the CC 61xx or CC 424, the filter order of the
low-pass filter can be set in MP_vCtrlEncInputFilt. Enter
MP_vCtrlEncInputFilt=0 under standard conditions.
Spindle: High-frequency spindles often cause considerable current noise
(shown by I nom or Utilization on the oscilloscope). The optimization goal is
as little current noise as possible at high spindle speeds.
MP_vCtrlEncInputFilt = 10 to 20 should be used as a starting value.
Axes: The low-pass filter should be used if the actual speed has "a lot of noise,"
for example MP_vCtrlEncInputFilt = 1 or 2. If there is no improvement, set
MP_vCtrlEncInputFilt = 0.
For adjustment of the filters, see "Filters in the speed controller and position
controller when using the CC 61xx and CC 424" on page 857.
Machine
parameters
MP_vCtrlEncInputFilt
Filter order of the FIR filter (low-pass filter)
Available from NCK software version: 597 110-01.
Format: Numerical value
Input: 0 to 20
0: No low-pass filter
1: 1st-order low-pass filter
. . .
20: 20th-order low-pass filter
Default: 0
Access: LEVEL3
Reaction: RUN
Settings in the configuration editor MP number
Axes
ParameterSets
[Key name of the parameter set]
CfgSpeedControl
vCtrlEncInputFilt 400906
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