3.6.10.3.1.2 Secure Non-Detection Of A Discrepancy Timeout; Table 25: Tgand : Offset Defined By Smoothing And Sampling - WAGO 753-668/000-004 Manual

WAGO-I/O-SYSTEM 750
753-668/000-004 4FAI 0/4-20 mA Diff PROFIsafe

3.6.10.3.1.2 Secure Non-Detection of a Discrepancy Timeout

The following formula can be used to calculate the maximum actual discrepancy
time between two input signals Tn
certainly report no discrepancy error.
��
Factor
T
nD,max
Discrepancy Time
Discrepancy Factor 0.98767
T
GAnD
Table 25: T
GAnD
T
GAnD
Note the suitability of the parameter combinations!
If T ≤ 0, then the selected parameter combination is unsuitable because
nD,max
irrespective of its duration a discrepancy of the input signals can potentially lead
to a discrepancy error.
= Discrepancy Time × ��. ���������� + ��
nD,max
Value
Maximum actual discrepancy time between two input
signals
Configured discrepancy time
Offset defined by smoothing and sampling – see table
below for exact values
: Offset Defined by Smoothing and Sampling
100
−6 ms
1
2 1 ms
4 17 ms
8
48 ms
16 111 ms
32
236 ms
64 486 ms
as a result of which the F-AI module will
D,max
Sampling Frequency in Hz
60
−8 ms
3 ms
28 ms
79 ms
179 ms
378 ms
779 ms
Version 1.0.0, valid from HW/SW Version 01/01
Device Description
GAnD
50
−8 ms −31 ms
6 ms 46 ms
37 ms 203 ms
100 ms 516 ms
225 ms 1142 ms
476 ms 2394 ms
977 ms 4899 ms
Manual
45
10