Digital Signal Filters - Siemens SIMATIC ET 200SP Operating Instructions Manual

Parameter assignment/addressing
6.5 DR03 Calibration parameters
Stability weight 2 [stabilityWeight2]
The parameter defines the permissible deviation (+/-) at which the weight is allowed to fluctuate
within the stability time to detect stability. The input is made in the unit of weight.
Stability time 2 (s) [stabilityTime2]
Defines the time window in which the current weight value may fluctuate only within the stability
weight (+/-) to report stability.
Maximum waiting time for stability 2 (s) [maximumWaitingTimeStability2]
This parameter defines a maximum waiting time for stability on start of a command which
depends on stability. If the command could not be started during the waiting time due to a lack
of stability, a technology message is generated by the electronic weighing system. If the
parameter is set to 0 , a data/operating error is directly reported in the event of a lack of stability.
Delay time before stability 2 (s) [delayTimeBeforeStability2]
Defines a delay time which expires before a check for stability is performed. In the case of
stability 2, this time can be used, for example, to slowly capture material still flowing after
closing of the dosing elements.
6.5.24

Digital signal filters

Filter 1 [filter1Period] and 2 period[filter2Period]
Defines in seconds the periods of the filters 1 and 2 to selectively filter out interference
frequencies.
If the period is set to 0.1 s, for example, this has a suppression effect on interference
frequencies comprising multiples of 10 Hz. If no other interference frequencies are known apart
from the local network frequencies, we recommend leaving both periods at the default value
(0.1 s).
Characteristic low pass filter [characteristicLowPassFilter]
Defines the characteristic of the low-pass filter. You have the following choices:
Selection code
0
1
Ordinal number low pass filter [ordinalNumberLowPassFilter]
Defines the effect of damping.
Selection code
2, 4, 6, 8 add 10
0
68
Characteristics
Critically dampened
Bessel
The higher the selected filter number, the higher
the effect.
Filter deactivated
Technology module TM SIWAREX WP351 HF
Operating Instructions, 01/2020, A5E47521010-AA