User guide

Mode 1 Characteristic (FIR-Filter)
FL Settling time to
0.1%
(ms)
3dBCut-off
(Hz)
20 dB damping
at frequency
(Hz)
40 dB damping
at frequency
(Hz)
Dampinginthe
stopband
(dB)
Stopband
(Hz)
Output rate
max.
(samples/s)
0 no filtering ** 600
1 47 19.7 48 64 >90 >80 600
2 93 9.8 24 32 >90 >40 300
3 140 6.5 16 21 >90 >26 200
4 187 4.9 12 16 >90 >20 150
5 233 3.9 10 13 >90 >16 120
6 280 3.2 8 11 >90 >13 100
7 327 2.8 7 9 >90 >11 85.7
8 373 2.5 6 8 >90 >10 75
** Antialiasing filter 17 Hz @ 60 dB/decade
Attention:
In mode 1 the output rate is dependant on the selected filter level (FL).
UR Set the update rate (average building)
This command will define over how many measurements, from the preceeding IIR or FIR filter, an average
will be calculated. The average will be calculated over 2
UR
samples. Permitted values 0...7 (see table below)
UR 01234567
numberofsamples1248163264128
Check / adjustment update rate:
Master ( PC / PLC ) sends LDU XX.X responds Result
UR¿
U+0001
Request: average over 2 samples
UR_4¿
OK
Setting: average over 16 samples
Factory default: 0 [no average, = 600 samples/s]
Remark to Mode 1
Dependency Output Rate - averaging UR - Filter FL
UR Output Rate samples/s
FL 0 FL 1
19.7 Hz
FL 2
9.8 Hz
FL 3
6.5 Hz
FL 4
4.9 Hz
FL 5
3.9 Hz
FL 6
3.2 Hz
FL 7
2.8 Hz
FL 8
2.5 Hz
0 600 600 300 200 150 120 100 85.7 75
1 300 300 150 100 75 60 50 42.85 37.5
2 150 150 75 50 37,5 30 25 21.42 18.75
3 75 75 37.5 25 18.75 15 12.5 10.71 9.38
4 37.5 37.5 18.75 12.5 9.38 7.5 6.25 5.36 4.69
5 18.75 18.75 9.38 6.25 4.69 3.75 3.13 2.68 2.34
6 9.38 9.38 4.69 3.13 2.34 1.88 1.56 1.34 1.17
7 4.69 4.69 2.34 1.56 1.17 0.94 0.78 0.67 0.59
Manual DAS 72.1 Page 39