Measurement filtering. Schneider Electric Software PLC Application-Specific Functions, Micro/Junior/Pro, 4.5
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Measurement filtering
At a Glance
Filter values
The system uses first order filtering.
The filtering coefficient can be modified (See Modification of the Filtering Value,
p. 247) from the PL7 screen or via the program.
At configuration, the user selects the filter value from seven possible values (0 to 6).
The filter values are as follows:
Required efficiency
No filtering
Low filtering
Medium filtering 3
4
High filtering 5
6
1
2
Value to be selected
0 0
α
corresponding
0,750
0,875
0,937
0,969
0,984
0,992
Filter response time
Cut-off frequency
(Hz)
0
1.81 s
3.89 s
8.06 s
16.4 s
33 s
66.3 s
Hardware filtering
0,0879
0,0409
0,0197
0,0097
0,0048
0,0024
Note: Measurement filtering is suspended when execution of the MAST task is interrupted at a breakpoint (in the debugging phase). When the breakpoint is cleared, filtering restarts without recognizing the inputs acquired during the stopped period.
200
TLX DS 37 PL7 xxE
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