20 Analog input module XN-322-4AI-PTNI
20.6 Filters
142
XN300 slice modules
06/16 MN050002 EN
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If the measuring range is exceeded or fallen below, but the reading still falls
within the limits for range diagnostics, the fact that the permissible measur-
ing range has been exceeded/fallen below will be indicated by setting the
range diagnostics' (measuring range diagnostics) status to "TRUE." In this
case, the open wire diagnostics will remain "FALSE," and a reading will be
shown.
If the reading exceeds or falls below the limits for range diagnostics, the
device will be unable to perform a measurement, just like in the event of an
cable break. In this case, the cable break diagnostics will signal the fault by
having their status set to "TRUE," while the range diagnostics will keep a sta-
tus of "FALSE." When this occurs, a value of "-30000" will be shown as the
reading.
If a channel is disabled, there will not be any measurements, and the open
wire diagnostics will indicate this with the "TRUE" status.
20.6 Filters
The low-pass cutoff frequency can be configured for each input channel
using the appropriate register. This cutoff frequency is specified in Hz with-
out any decimal places.
Example: 50 Hz low-pass cutoff frequency; register value: 50
dec
/ 32
hex
The following settings are valid:
→
Range and open wire diagnostics must be taken into account in
order to ensure that the reading shown is being interpreted cor-
rectly.
Low-pass cut-off frequency
Register value
Filter disabled (default)
0x0000
10 Hz
0x000A
25 Hz
0x0019
50 Hz
0x0032
100 Hz
0x0064
Содержание XN300
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