8.4.15 Low-pass filter limit frequency
There is a critically damped low-pass filter for suppressing faults. The diagram below shows the
step response of the filter (f
g
= 2 Hz). The entry "0" means that the filter is switched off. The
setting range of the limit frequency is 0.01 to 50.0 Hz.
Figure 8-2 Step response of the digital low-pass filter when f
g
= 2 Hz
When you define the limit frequency, it is extremely important for the suppression of faults.
Defining the limit frequency defines the "speed" of the scale's response to changes in the
measured value.
A value of 5 Hz, for example, results in a relatively rapid response to a change in weight. A value
of 0.5 Hz, for example, makes the scale "slower".
Note
Process values filtered with low-pass filter 1 are available at the SIMATIC I/O (DR 14) and in the
DR 30. Process values filtered with low-pass filter 2 can only be set to the SIMATIC I/O with the
corresponding selection in DR 14.
8.4.16 Low-pass filter number
The number of the filter defines the effect of damping. The values 2 and 4 can be set. The higher
the selected filter number, the higher the effect.
Scale parameters and functions
8.4 DR 3 calibration parameters
SIWAREX WP321
66 Operating Instructions, 08/2019, A5E33715669A-AD
To Next Page
Loading...
Need help?
General
